Table of Contents

PIMCO ETF TRUST

Semiannual Report

December 31, 2021

Index Exchange-Traded Funds

PIMCO 25+ Year Zero Coupon U.S. Treasury Index Exchange-Traded Fund | ZROZ | NYSE Arca

PIMCO 1-5 Year U.S. TIPS Index Exchange-Traded Fund | STPZ | NYSE Arca

PIMCO 15+ Year U.S. TIPS Index Exchange-Traded Fund | LTPZ | NYSE Arca

PIMCO Broad U.S. TIPS Index Exchange-Traded Fund | TIPZ | NYSE Arca

PIMCO 0-5 Year High Yield Corporate Bond Index Exchange-Traded Fund | HYS | NYSE Arca

PIMCO Investment Grade Corporate Bond Index Exchange-Traded Fund | CORP | NYSE Arca

Actively-Managed Exchange-Traded Funds

PIMCO Active Bond Exchange-Traded Fund | BOND | NYSE Arca

PIMCO Enhanced Low Duration Active Exchange-Traded Fund | LDUR | NYSE Arca

PIMCO Enhanced Short Maturity Active ESG Exchange-Traded Fund | EMNT | NYSE Arca

PIMCO Enhanced Short Maturity Active Exchange-Traded Fund | MINT | NYSE Arca

PIMCO Intermediate Municipal Bond Active Exchange-Traded Fund | MUNI | NYSE Arca

PIMCO Municipal Income Opportunities Active Exchange-Traded Fund | MINO | NYSE Arca

PIMCO Short Term Municipal Bond Active Exchange-Traded Fund | SMMU | NYSE Arca

Table of Contents

Table of Contents

This material is authorized for use only when preceded or accompanied by the current PIMCO ETF Trust prospectus.

Table of Contents

Dear Shareholder,

We hope that you and your family are remaining safe and healthy during these challenging times. We continue to work tirelessly to navigate markets and manage the assets that you have entrusted to us. Following this letter is the PIMCO ETF Semiannual Report, which covers the six-month reporting period ended December 31, 2021. On the subsequent pages, you will find specific details regarding investment results and a discussion of the factors that most affected performance during the reporting period.

For the six-month reporting period ended December 31, 2021

The global economy continued to be affected by the COVID-19 pandemic (“COVID-19”) and its variants. Looking back, second quarter 2021 U.S. annualized gross domestic product (“GDP”) was 6.7%. Growth then moderated to 2.3% during the third quarter of the year. Finally, the Commerce Department’s initial estimate for fourth quarter annualized GDP growth — released after the reporting period ended — was 6.9%.

In the U.S., while the Federal Reserve Board (the “Fed”) maintained the federal funds rate at an all-time low of a range between 0.00% and 0.25%, it took a step toward tightening its monetary policy. At its meeting in early November 2021, the Fed began reducing the monthly pace of its net asset purchases of Treasury securities and agency mortgage-backed securities. At its meeting in mid-December, the Fed further reduced the monthly pace of its purchases. At the current pace, the U.S. central bank will conclude its asset purchases in mid-March 2022, and could raise interest rates during its March 2022 meeting.

Economies outside the U.S. also continued to be impacted by COVID-19. In its October 2021 World Economic Outlook, the International Monetary Fund (“IMF”) said it expects U.S. GDP growth to be 6.0% in 2021, compared to a 3.4% contraction in 2020. Elsewhere, the IMF expects 2021 GDP growth in the eurozone, U.K. and Japan will be 5.0%, 6.8% and 2.4%, respectively. For comparison purposes, the GDP of these economies contracted by -6.3%, -9.8% and -4.6%, respectively, in 2020.

The Bank of England (the “BoE”) also tightened its monetary policy, while several other developed country central banks maintained their accommodative stances. In December 2021, the BoE surprised the market and raised rates for the first time since COVID-19 began. The BoE cited underlying inflation pressures and expects inflation to remain high in the coming months. In contrast, the European Central Bank (the “ECB”) diverged from the Fed and the BoE, as President Christine Lagarde said, “It is very unlikely that we will raise interest rates in the year 2022.” The eurozone economy is still below its pre-pandemic level and the Omicron variant is threatening growth in the region. Elsewhere, the Bank of Japan (the “BoJ”) pared back its emergency pandemic funding in late 2021, but maintained its loose monetary policy. The BoJ appears likely to remain accommodative in the near future given the headwinds facing its economy.

Both short- and long-term U.S. Treasury yields moved higher during the reporting period. The yield on the benchmark 10-year U.S. Treasury note was 1.52% at the end of the reporting period, versus 1.45% on June 30, 2021. The Bloomberg Global Treasury Index (USD Hedged), which tracks fixed-rate, local currency government debt of investment-grade countries, including both developed and emerging markets, returned 0.16%. Meanwhile, the Bloomberg Global Aggregate Credit Index (USD Hedged), a widely used index of global investment-grade credit bonds, returned 0.10%. Riskier fixed income asset classes, including high yield corporate bonds and emerging market debt, produced mixed returns. The ICE BofAML Developed Markets High Yield Constrained Index (USD Hedged), a widely used index of below-investment-grade bonds, returned 1.36%, whereas emerging market external debt, as represented by the JPMorgan Emerging Markets Bond Index (EMBI) Global (USD Hedged), returned -0.52%. Emerging market local bonds, as represented by the JPMorgan Government Bond Index-Emerging Markets Global Diversified Index (Unhedged), returned -5.56%.

Amid periods of volatility, global equities posted mixed results. All told, U.S. equities, as represented by the S&P 500 Index, returned 11.67%, fueled by strong investor demand and growth in the economy. Global equities, as

Table of Contents

represented by the MSCI World Index, gained 7.76%, whereas emerging market equities, as measured by the MSCI Emerging Markets Index, returned -0.52%. Meanwhile, Japanese equities, as represented by the Nikkei 225 Index (in JPY), returned 0.82% and European equities, as represented by the MSCI Europe Index (in EUR), gained 8.48%.

Commodity prices were volatile and generated positive results. When the reporting period began, Brent crude oil was approximately $75 a barrel. Brent crude oil ended the reporting period at roughly $78 a barrel. We believe that a driver of the uptick in oil price was stronger demand as global growth improved. Elsewhere, copper and gold prices also moved higher.

Finally, there were also periods of volatility in the foreign exchange markets, in our view due to economic growth expectations, changing central bank monetary policies, rising inflation, COVID-19 variants, and several geopolitical events. The U.S. dollar strengthened against several major currencies. For example, the U.S. dollar returned 4.12%, 2.16% and 3.45% versus the euro, the British pound and the Japanese yen, respectively.

Thank you for the assets you have placed with us. We deeply value your trust, and we will continue to work diligently to meet your broad investment needs. For any questions regarding the PIMCO ETF Trust, please contact your financial adviser, or call one of our shareholder associates at (888) 400-4ETF. We also invite you to visit our website at www.pimco.com to learn more about PIMCO ETFs.

		Sincerely,     Peter G. Strelow Chairman of the Board PIMCO ETF Trust

Past performance is no guarantee of future results. Unless otherwise noted, index returns reflect the reinvestment of income distributions and capital gains, if any, but do not reflect fees, brokerage commissions or other expenses of investing. It is not possible to invest directly in an unmanaged index.

Table of Contents

Table of Contents

The following table discloses the inception dates of each Fund along with each Fund’s diversification status as of period end:

Table of Contents

Table of Contents

Table of Contents

PIMCO 25+ Year Zero Coupon U.S. Treasury Index Exchange-Traded Fund

Cumulative Returns Through December 31, 2021

$10,000 invested at the end of the month when the Fund commenced operations.

Allocation Breakdown as of December 31, 2021^†§

Average Annual Total Return for the period ended December 31, 2021
				6 Months*				1 Year				5 Year				10 Years				Fund Inception (10/30/2009)
		PIMCO 25+ Year Zero Coupon U.S. Treasury Index Exchange-Traded Fund (Based on Net Asset Value)			6.33%				(4.96)%				9.40%				6.01%				8.93%
		PIMCO 25+ Year Zero Coupon U.S. Treasury Index Exchange-Traded Fund (At Market Price)(1)			6.20%				(5.24)%				9.37%				5.97%				8.90%
		The ICE BofAML Long U.S. Treasury Principal STRIPS Index±			6.50%				(4.74)%				9.61%				6.26%				9.11%

All Fund returns are net of fees and expenses and include applicable fee waivers and/or expense limitations. Absent any applicable fee waivers and/or expense limitations, performance would have been lower and there can be no assurance that any such waivers or limitations will continue in the future.

* Cumulative return.

Market Returns do not include brokerage commissions that may be payable on secondary market transactions. If brokerage commissions were included, market returns would be lower. Market and NAV returns assume that dividends and capital gain distributions have been reinvested in the Fund at market price and NAV, respectively.

^± The ICE BofAML Long US Treasury Principal STRIPS Index is an unmanaged index comprised of long maturity Separate Trading of Registered Interest and Principal of Securities (STRIPS) representing the final principal payment of U.S. Treasury bonds.

It is not possible to invest directly in an unmanaged index.

Performance quoted represents past performance. Past performance is not a guarantee or a reliable indicator of future results. Current performance may be lower or higher than performance shown. Investment return and the principal value of an investment will fluctuate. Shares may be worth more or less than original cost when redeemed by authorized participants. Returns shown do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption of Fund shares. Differences in the Fund’s performance versus the index and related attribution information with respect to particular categories of securities or individual positions may be attributable, in part, to differences in the pricing methodologies used by the Fund and the index. Performance data current to the most recent month-end is available at www.pimcoetfs.com or via (888) 400-4ETF.

The Fund’s total annual operating expense ratio in effect as of period end was 0.15%. Details regarding any changes to the Fund’s operating expenses, subsequent to period end, can be found in the Fund’s current prospectus, as supplemented.

Investment Objective and Strategy Overview

PIMCO 25+ Year Zero Coupon U.S. Treasury Index Exchange-Traded Fund seeks to provide total return that closely corresponds, before fees and expenses, to the total return of the ICE BofA Long US Treasury Principal STRIPS Index (the “Underlying Index”), by investing under normal circumstances at least 80% of its total assets (exclusive of collateral held from securities lending) in the component securities (“Component Securities”) of the Underlying Index. The Fund may invest the remainder of its assets in Fixed Income Instruments that are not Component Securities, but which PIMCO believes will help the Fund track its Underlying Index, as well as in cash and investment grade, liquid short-term instruments, forwards or derivatives, such as options, futures contracts or swap agreements, and shares of affiliated bond funds. “Fixed Income Instruments” include bonds, debt securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities. Fund strategies may change from time to time. Please refer to the Fund’s current prospectus for more information regarding the Fund’s strategy.

Fund Insights at NAV

The following affected performance (on a gross basis) during the reporting period:

Table of Contents

PIMCO 1-5 Year U.S. TIPS Index Exchange-Traded Fund

Cumulative Returns Through December 31, 2021

$10,000 invested at the end of the month when the Fund commenced operations.

Allocation Breakdown as of December 31, 2021^†§

Average Annual Total Return for the period ended December 31, 2021
				6 Months*				1 Year				5 Year				10 Years				Fund Inception (08/20/2009)
		PIMCO 1-5 Year U.S. TIPS Index Exchange-Traded Fund (Based on Net Asset Value)			2.49%				5.37%				3.27%				1.76%				2.35%
		PIMCO 1-5 Year U.S. TIPS Index Exchange-Traded Fund (At Market Price)(1)			2.71%				5.64%				3.31%				1.78%				2.37%
		The ICE BofAML 1-5 Year U.S. Inflation-Linked Treasury Index±			2.52%				5.50%				3.47%				1.97%				2.57%

All Fund returns are net of fees and expenses and include applicable fee waivers and/or expense limitations. Absent any applicable fee waivers and/or expense limitations, performance would have been lower and there can be no assurance that any such waivers or limitations will continue in the future.

* Cumulative return.

Market Returns do not include brokerage commissions that may be payable on secondary market transactions. If brokerage commissions were included, market returns would be lower. Market and NAV returns assume that dividends and capital gain distributions have been reinvested in the Fund at market price and NAV, respectively.

^± The ICE BofAML 1-5 Year US Inflation-Linked Treasury Index is an unmanaged index comprised of TIPS (Treasury Inflation Protected Securities) with a maturity of at least 1 year and less than 5 years.

It is not possible to invest directly in an unmanaged index.

Performance quoted represents past performance. Past performance is not a guarantee or a reliable indicator of future results. Current performance may be lower or higher than performance shown. Investment return and the principal value of an investment will fluctuate. Shares may be worth more or less than original cost when redeemed by authorized participants. Returns shown do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption of Fund shares. Differences in the Fund’s performance versus the index and related attribution information with respect to particular categories of securities or individual positions may be attributable, in part, to differences in the pricing methodologies used by the Fund and the index. Performance data current to the most recent month-end is available at www.pimcoetfs.com or via (888) 400-4ETF.

The Fund’s total annual operating expense ratio in effect as of period end was 0.20%. Details regarding any changes to the Fund’s operating expenses, subsequent to period end, can be found in the Fund’s current prospectus, as supplemented.

Investment Objective and Strategy Overview

PIMCO 1-5 Year U.S. TIPS Index Exchange-Traded Fund seeks to provide total return that closely corresponds, before fees and expenses, to the total return of the ICE BofA 1-5 Year US Inflation-Linked Treasury Index (the “Underlying Index”), by investing under normal circumstances at least 80% of its total assets (exclusive of collateral held from securities lending) in the component securities (“Component Securities”) of the Underlying Index. The Fund may invest the remainder of its assets in Fixed Income Instruments that are not Component Securities, but which PIMCO believes will help the Fund track its Underlying Index, as well as in cash and investment grade, liquid short-term instruments, forwards or derivatives, such as options, futures contracts or swap agreements, and shares of affiliated bond funds. “Fixed Income Instruments” include bonds, debt securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities. Fund strategies may change from time to time. Please refer to the Fund’s current prospectus for more information regarding the Fund’s strategy.

Fund Insights at NAV

The following affected performance (on a gross basis) during the reporting period:

Table of Contents

PIMCO 15+ Year U.S. TIPS Index Exchange-Traded Fund

Cumulative Returns Through December 31, 2021

$10,000 invested at the end of the month when the Fund commenced operations.

Allocation Breakdown as of December 31, 2021^†§

Average Annual Total Return for the period ended December 31, 2021
				6 Months*				1 Year				5 Year				10 Years				Fund Inception (09/03/2009)
		PIMCO 15+ Year U.S. TIPS Index Exchange-Traded Fund (Based on Net Asset Value)			8.35%				7.00%				9.75%				5.50%				7.37%
		PIMCO 15+ Year U.S. TIPS Index Exchange-Traded Fund (At Market Price)(1)			8.47%				7.01%				9.76%				5.51%				7.37%
		The ICE BofAML 15+ Year U.S. Inflation-Linked Treasury Index±			8.47%				7.19%				9.96%				5.71%				7.58%

All Fund returns are net of fees and expenses and include applicable fee waivers and/or expense limitations. Absent any applicable fee waivers and/or expense limitations, performance would have been lower and there can be no assurance that any such waivers or limitations will continue in the future.

* Cumulative return.

Market Returns do not include brokerage commissions that may be payable on secondary market transactions. If brokerage commissions were included, market returns would be lower. Market and NAV returns assume that dividends and capital gain distributions have been reinvested in the Fund at market price and NAV, respectively.

^± The ICE BofAML 15+ Year US Inflation-Linked Treasury Index is an unmanaged index comprised of TIPS (Treasury Inflation Protected Securities) with a maturity of at least 15 years.

It is not possible to invest directly in an unmanaged index.

Performance quoted represents past performance. Past performance is not a guarantee or a reliable indicator of future results. Current performance may be lower or higher than performance shown. Investment return and the principal value of an investment will fluctuate. Shares may be worth more or less than original cost when redeemed by authorized participants. Returns shown do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption of Fund shares. Differences in the Fund’s performance versus the index and related attribution information with respect to particular categories of securities or individual positions may be attributable, in part, to differences in the pricing methodologies used by the Fund and the index. Performance data current to the most recent month-end is available at www.pimcoetfs.com or via (888) 400-4ETF.

The Fund’s total annual operating expense ratio in effect as of period end was 0.20%. Details regarding any changes to the Fund’s operating expenses, subsequent to period end, can be found in the Fund’s current prospectus, as supplemented.

Investment Objective and Strategy Overview

PIMCO 15+ Year U.S. TIPS Index Exchange-Traded Fund seeks to provide total return that closely corresponds, before fees and expenses, to the total return of the ICE BofA 15+ Year US Inflation-Linked Treasury Index (the “Underlying Index”), by investing under normal circumstances at least 80% of its total assets (exclusive of collateral held from securities lending) in the component securities (“Component Securities”) of the Underlying Index. The Fund may invest the remainder of its assets in Fixed Income Instruments that are not Component Securities, but which PIMCO believes will help the Fund track its Underlying Index, as well as in cash and investment grade, liquid short-term instruments, forwards or derivatives, such as options, futures contracts or swap agreements, and shares of affiliated bond funds. “Fixed Income Instruments” include bonds, debt securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities. Fund strategies may change from time to time. Please refer to the Fund’s current prospectus for more information regarding the Fund’s strategy.

Fund Insights at NAV

The following affected performance (on a gross basis) during the reporting period:

Table of Contents

PIMCO Broad U.S. TIPS Index Exchange-Traded Fund

Cumulative Returns Through December 31, 2021

$10,000 invested at the end of the month when the Fund commenced operations.

Allocation Breakdown as of December 31, 2021^†§

Average Annual Total Return for the period ended December 31, 2021
				6 Months*				1 Year				5 Year				10 Years				Fund Inception (09/03/2009)
		PIMCO Broad U.S. TIPS Index Exchange-Traded Fund (Based on Net Asset Value)			4.08%				5.71%				5.31%				3.00%				4.29%
		PIMCO Broad U.S. TIPS Index Exchange-Traded Fund (At Market Price)(1)			4.29%				5.92%				5.29%				3.00%				4.30%
		The ICE BofAML U.S. Inflation-Linked Treasury Index±			4.30%				6.01%				5.53%				3.21%				4.49%

All Fund returns are net of fees and expenses and include applicable fee waivers and/or expense limitations. Absent any applicable fee waivers and/or expense limitations, performance would have been lower and there can be no assurance that any such waivers or limitations will continue in the future.

* Cumulative return.

Market Returns do not include brokerage commissions that may be payable on secondary market transactions. If brokerage commissions were included, market returns would be lower. Market and NAV returns assume that dividends and capital gain distributions have been reinvested in the Fund at market price and NAV, respectively.

^± The ICE BofAML US Inflation-Linked Treasury Index is an unmanaged index comprised of TIPS (Treasury Inflation Protected Securities).

It is not possible to invest directly in an unmanaged index.

Performance quoted represents past performance. Past performance is not a guarantee or a reliable indicator of future results. Current performance may be lower or higher than performance shown. Investment return and the principal value of an investment will fluctuate. Shares may be worth more or less than original cost when redeemed by authorized participants. Returns shown do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption of Fund shares. Differences in the Fund’s performance versus the index and related attribution information with respect to particular categories of securities or individual positions may be attributable, in part, to differences in the pricing methodologies used by the Fund and the index. Performance data current to the most recent month-end is available at www.pimcoetfs.com or via (888) 400-4ETF.

The Fund’s total annual operating expense ratio in effect as of period end was 0.20%. Details regarding any changes to the Fund’s operating expenses, subsequent to period end, can be found in the Fund’s current prospectus, as supplemented.

Investment Objective and Strategy Overview

PIMCO Broad U.S. TIPS Index Exchange-Traded Fund seeks to provide total return that closely corresponds, before fees and expenses, to the total return of the ICE BofA US Inflation-Linked Treasury Index (the “Underlying Index”), by investing under normal circumstances at least 80% of its total assets (exclusive of collateral held from securities lending) in the component securities (“Component Securities”) of the Underlying Index. The Fund may invest the remainder of its assets in Fixed Income Instruments that are not Component Securities, but which PIMCO believes will help the Fund track its Underlying Index, as well as in cash and investment grade, liquid short-term instruments, forwards or derivatives, such as options, futures contracts or swap agreements, and shares of affiliated bond funds. PIMCO uses an indexing approach in managing the Fund’s investments. “Fixed Income Instruments” include bonds, debt securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities. Fund strategies may change from time to time. Please refer to the Fund’s current prospectus for more information regarding the Fund’s strategy.

Fund Insights at NAV

The following affected performance (on a gross basis) during the reporting period:

Table of Contents

PIMCO 0-5 Year High Yield Corporate Bond Index Exchange-Traded Fund

Cumulative Returns Through December 31, 2021

$10,000 invested at the end of the month when the Fund commenced operations.

Allocation Breakdown as of December 31, 2021^†§

Average Annual Total Return for the period ended December 31, 2021
				6 Months*				1 Year				5 Year				10 Years				Fund Inception (06/16/2011)
		PIMCO 0-5 Year High Yield Corporate Bond Index Exchange-Traded Fund (Based on Net Asset Value)			0.73%				4.74%				4.50%				5.20%				4.92%
		PIMCO 0-5 Year High Yield Corporate Bond Index Exchange-Traded Fund (At Market Price)(1)			1.12%				4.76%				4.60%				5.11%				4.96%
		ICE BofAML 0-5 Year US High Yield Constrained Index±			1.25%				6.01%				5.18%				5.88%				5.53%

All Fund returns are net of fees and expenses and include applicable fee waivers and/or expense limitations. Absent any applicable fee waivers and/or expense limitations, performance would have been lower and there can be no assurance that any such waivers or limitations will continue in the future.

* Cumulative return.

Market Returns do not include brokerage commissions that may be payable on secondary market transactions. If brokerage commissions were included, market returns would be lower. Market and NAV returns assume that dividends and capital gain distributions have been reinvested in the Fund at market price and NAV, respectively.

^± The ICE BofAML 0-5 Year US High Yield Constrained Index tracks the performance of short-term U.S. dollar denominated below investment grade corporate debt issued in the U.S. domestic market with less than five years remaining term to final maturity, a fixed coupon schedule and a minimum amount outstanding of $250 million, issued publicly. Allocations to an individual issuer will not exceed 2%.

It is not possible to invest directly in an unmanaged index.

Performance quoted represents past performance. Past performance is not a guarantee or a reliable indicator of future results. Current performance may be lower or higher than performance shown. Investment return and the principal value of an investment will fluctuate. Shares may be worth more or less than original cost when redeemed by authorized participants. Returns shown do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption of Fund shares. Differences in the Fund’s performance versus the index and related attribution information with respect to particular categories of securities or individual positions may be attributable, in part, to differences in the pricing methodologies used by the Fund and the index. Performance data current to the most recent month-end is available at www.pimcoetfs.com or via (888) 400-4ETF.

The Fund’s total annual operating expense ratio in effect as of period end was 0.55%. Details regarding any changes to the Fund’s operating expenses, subsequent to period end, can be found in the Fund’s current prospectus, as supplemented.

Investment Objective and Strategy Overview

PIMCO 0-5 Year High Yield Corporate Bond Index Exchange-Traded Fund seeks to provide total return that closely corresponds, before fees and expenses, to the total return of the ICE BofA 0-5 Year US High Yield Constrained Index (the “Underlying Index”), by investing under normal circumstances at least 80% of its total assets (exclusive of collateral held from securities lending) in the component securities (“Component Securities”) of the Underlying Index. The Fund may invest the remainder of its assets in Fixed Income Instruments that are not Component Securities, but which PIMCO believes will help the Fund track its Underlying Index, as well as in cash and investment grade, liquid short-term instruments, forwards or derivatives, such as options, futures contracts or swap agreements, and shares of affiliated bond funds. “Fixed Income Instruments” include bonds, debt securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities. Fund strategies may change from time to time. Please refer to the Fund’s current prospectus for more information regarding the Fund’s strategy.

Fund Insights at NAV

The following affected performance (on a gross basis) during the reporting period:

Table of Contents

PIMCO Investment Grade Corporate Bond Index Exchange-Traded Fund

Cumulative Returns Through December 31, 2021

$10,000 invested at the end of the month when the Fund commenced operations.

Allocation Breakdown as of December 31, 2021^†§

Average Annual Total Return for the period ended December 31, 2021
				6 Months*				1 Year				5 Year				10 Years				Fund Inception (09/20/2010)
		PIMCO Investment Grade Corporate Bond Index Exchange-Traded Fund (Based on Net Asset Value)			0.04%				(1.08)%				5.21%				4.72%				4.75%
		PIMCO Investment Grade Corporate Bond Index Exchange-Traded Fund (At Market Price)(1)			0.00%				(1.18)%				5.17%				4.73%				4.73%
		ICE BofAML US Corporate Index±			0.04%				(1.03)%				5.28%				4.76%				4.83%

All Fund returns are net of fees and expenses and include applicable fee waivers and/or expense limitations. Absent any applicable fee waivers and/or expense limitations, performance would have been lower and there can be no assurance that any such waivers or limitations will continue in the future.

* Cumulative return.

Market Returns do not include brokerage commissions that may be payable on secondary market transactions. If brokerage commissions were included, market returns would be lower. Market and NAV returns assume that dividends and capital gain distributions have been reinvested in the Fund at market price and NAV, respectively.

^± ICE BofAML US Corporate Index is an unmanaged index comprised of U.S. dollar denominated investment grade, fixed rate corporate debt securities publicly issued in the U.S. domestic market with at least one year remaining term to final maturity and at least $250 million outstanding.

It is not possible to invest directly in an unmanaged index.

Performance quoted represents past performance. Past performance is not a guarantee or a reliable indicator of future results. Current performance may be lower or higher than performance shown. Investment return and the principal value of an investment will fluctuate. Shares may be worth more or less than original cost when redeemed by authorized participants. Returns shown do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption of Fund shares. Differences in the Fund’s performance versus the index and related attribution information with respect to particular categories of securities or individual positions may be attributable, in part, to differences in the pricing methodologies used by the Fund and the index. Performance data current to the most recent month-end is available at www.pimcoetfs.com or via (888) 400-4ETF.

The Fund’s total annual operating expense ratio in effect as of period end was 0.20%. Details regarding any changes to the Fund’s operating expenses, subsequent to period end, can be found in the Fund’s current prospectus, as supplemented.

Investment Objective and Strategy Overview

PIMCO Investment Grade Corporate Bond Index Exchange-Traded Fund seeks to provide total return that closely corresponds, before fees and expenses, to the total return of the ICE BofA US Corporate Index (the “Underlying Index”), by investing under normal circumstances at least 80% of its total assets (exclusive of collateral held from securities lending) in the component securities (“Component Securities”) of the Underlying Index. The Fund may invest the remainder of its assets in Fixed Income Instruments that are not Component Securities, but which PIMCO believes will help the Fund track its Underlying Index, as well as in cash and investment grade, liquid short-term instruments, forwards or derivatives, such as options, futures contracts or swap agreements, and shares of affiliated bond funds. “Fixed Income Instruments” include bonds, debt securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities. Fund strategies may change from time to time. Please refer to the Fund’s current prospectus for more information regarding the Fund’s strategy.

Fund Insights at NAV

The following affected performance (on a gross basis) during the reporting period:

Table of Contents

PIMCO Active Bond Exchange-Traded Fund

Cumulative Returns Through December 31, 2021

$10,000 invested at the end of the month when the Fund commenced operations.

Allocation Breakdown as of December 31, 2021^†§

Average Annual Total Return for the period ended December 31, 2021
				6 Months*				1 Year				5 Year				Fund Inception (02/29/2012)
		PIMCO Active Bond Exchange-Traded Fund (Based on Net Asset Value)			0.09%				(0.59)%				4.06%				4.18%
		PIMCO Active Bond Exchange-Traded Fund (At Market Price)(1)			0.08%				(0.77)%				4.07%				4.17%
		Bloomberg U.S. Aggregate Index±			0.06%				(1.54)%				3.57%				2.86%

All Fund returns are net of fees and expenses and include applicable fee waivers and/or expense limitations. Absent any applicable fee waivers and/or expense limitations, performance would have been lower and there can be no assurance that any such waivers or limitations will continue in the future.

* Cumulative return.

Market Returns do not include brokerage commissions that may be payable on secondary market transactions. If brokerage commissions were included, market returns would be lower. Market and NAV returns assume that dividends and capital gain distributions have been reinvested in the Fund at market price and NAV, respectively.

^± Bloomberg U.S. Aggregate Index represents securities that are SEC-registered, taxable, and dollar denominated. The index covers the U.S. investment grade fixed rate bond market, with index components for government and corporate securities, mortgage pass-through securities, and asset-backed securities. These major sectors are subdivided into more specific indices that are calculated and reported on a regular basis.

It is not possible to invest directly in an unmanaged index.

Performance quoted represents past performance. Past performance is not a guarantee or a reliable indicator of future results. Current performance may be lower or higher than performance shown. Investment return and the principal value of an investment will fluctuate. Shares may be worth more or less than original cost when redeemed by authorized participants. Returns shown do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption of Fund shares. Differences in the Fund’s performance versus the index and related attribution information with respect to particular categories of securities or individual positions may be attributable, in part, to differences in the pricing methodologies used by the Fund and the index. Performance data current to the most recent month-end is available at www.pimcoetfs.com or via (888) 400-4ETF.

The Fund’s total annual operating expense ratio in effect as of period end was 0.55%. Details regarding any changes to the Fund’s operating expenses, subsequent to period end, can be found in the Fund’s current prospectus, as supplemented.

Investment Objective and Strategy Overview

PIMCO Active Bond Exchange-Traded Fund seeks current income and long-term capital appreciation, consistent with prudent investment management, by investing under normal circumstances at least 80% of its assets in a diversified portfolio of Fixed Income Instruments of varying maturities, which may be represented by forwards or derivatives such as options, futures contracts, or swap agreements. “Fixed Income Instruments” include bonds, debt securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities. Fund strategies may change from time to time. Please refer to the Fund’s current prospectus for more information regarding the Fund’s strategy.

Fund Insights at NAV

The following affected performance (on a gross basis) during the reporting period:

Table of Contents

PIMCO Enhanced Low Duration Active Exchange-Traded Fund

Cumulative Returns Through December 31, 2021

$10,000 invested at the end of the month when the Fund commenced operations.

Allocation Breakdown as of December 31, 2021^†§

Average Annual Total Return for the period ended December 31, 2021
				6 Months*				1 Year				5 Year				Fund Inception (01/22/2014)
		PIMCO Enhanced Low Duration Active Exchange-Traded Fund (Based on Net Asset Value)			(0.54)%				(0.31)%				2.38%				2.35%
		PIMCO Enhanced Low Duration Active Exchange-Traded Fund (At Market Price)(1)			(0.65)%				(0.54)%				2.32%				2.33%
		ICE BofAML 1-3 Year U.S. Treasury Index±			(0.47)%				(0.55)%				1.61%				1.27%

All Fund returns are net of fees and expenses and include applicable fee waivers and/or expense limitations. Absent any applicable fee waivers and/or expense limitations, performance would have been lower and there can be no assurance that any such waivers or limitations will continue in the future.

* Cumulative return.

Market Returns do not include brokerage commissions that may be payable on secondary market transactions. If brokerage commissions were included, market returns would be lower. Market and NAV returns assume that dividends and capital gain distributions have been reinvested in the Fund at market price and NAV, respectively.

^± The ICE BofAML 1-3 Year U.S. Treasury Index is an unmanaged index comprised of U.S. Treasury securities, other than inflation-protection securities and STRIPS, with at least $1 billion in outstanding face value and a remaining term to final maturity of at least one year and less than three years.

It is not possible to invest directly in an unmanaged index.

Performance quoted represents past performance. Past performance is not a guarantee or a reliable indicator of future results. Current performance may be lower or higher than performance shown. Investment return and the principal value of an investment will fluctuate. Shares may be worth more or less than original cost when redeemed by authorized participants. Returns shown do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption of Fund shares. Differences in the Fund’s performance versus the index and related attribution information with respect to particular categories of securities or individual positions may be attributable, in part, to differences in the pricing methodologies used by the Fund and the index. Performance data current to the most recent month-end is available at www.pimcoetfs.com or via (888) 400-4ETF.

The Fund’s total annual operating expense ratio in effect as of period end was 0.49%. Details regarding any changes to the Fund’s operating expenses, subsequent to period end, can be found in the Fund’s current prospectus, as supplemented.

Investment Objective and Strategy Overview

PIMCO Enhanced Low Duration Active Exchange-Traded Fund seeks maximum total return, consistent with preservation of capital and prudent investment management, by investing under normal circumstances at least 80% of its net assets in a diversified portfolio of Fixed Income Instruments of varying maturities, which may be represented by forwards or derivatives such as options, futures contracts, or swap agreements. “Fixed Income Instruments” include bonds, debt securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities. Fund strategies may change from time to time. Please refer to the Fund’s current prospectus for more information regarding the Fund’s strategy.

Fund Insights at NAV

The following affected performance (on a gross basis) during the reporting period:

Table of Contents

PIMCO Enhanced Short Maturity Active ESG Exchange-Traded Fund

Cumulative Returns Through December 31, 2021

$10,000 invested at the end of the month when the Fund commenced operations.

Allocation Breakdown as of December 31, 2021^†§

Average Annual Total Return for the period ended December 31, 2021
				6 Months*				1 Year				Fund Inception (12/10/2019)
		PIMCO Enhanced Short Maturity Active ESG Exchange-Traded Fund (Based on Net Asset Value)			(0.03)%				0.20%				1.22%
		PIMCO Enhanced Short Maturity Active ESG Exchange-Traded Fund (At Market Price)(1)(2)			(0.04)%				0.18%				1.20%
		FTSE 3-Month Treasury Bill Index±			0.02%				0.05%				0.35%

All Fund returns are net of fees and expenses and include applicable fee waivers and/or expense limitations. Absent any applicable fee waivers and/or expense limitations, performance would have been lower and there can be no assurance that any such waivers or limitations will continue in the future.

* Cumulative return.

Market Returns do not include brokerage commissions that may be payable on secondary market transactions. If brokerage commissions were included, market returns would be lower. Market and NAV returns assume that dividends and capital gain distributions have been reinvested in the Fund at market price and NAV, respectively.

^± FTSE 3-Month Treasury Bill Index is an unmanaged index representing monthly return equivalents of yield averages of the last 3 month Treasury Bill issues.

It is not possible to invest directly in an unmanaged index.

Performance quoted represents past performance. Past performance is not a guarantee or a reliable indicator of future results. Current performance may be lower or higher than performance shown. Investment return and the principal value of an investment will fluctuate. Shares may be worth more or less than original cost when redeemed by authorized participants. Returns shown do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption of Fund shares. Differences in the Fund’s performance versus the index and related attribution information with respect to particular categories of securities or individual positions may be attributable, in part, to differences in the pricing methodologies used by the Fund and the index. Performance data current to the most recent month-end is available at www.pimcoetfs.com or via (888) 400-4ETF.

The Fund’s total annual operating expense ratio in effect as of period end was 0.36%. Details regarding any changes to the Fund’s operating expenses, subsequent to period end, can be found in the Fund’s current prospectus, as supplemented.

Investment Objective and Strategy Overview

PIMCO Enhanced Short Maturity Active ESG Exchange-Traded Fund seeks maximum current income, consistent with preservation of capital and daily liquidity, while incorporating PIMCO’s ESG investment strategy. The Fund seeks to achieve its investment objective by investing under normal circumstances at least 80% of its net assets in a diversified portfolio of Fixed Income Instruments of varying maturities, which may be represented by forwards. “Fixed Income Instruments” include bonds, debt securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities. The Fund will not invest in the securities of any non-governmental issuer determined by PIMCO to be engaged principally in the manufacture of alcoholic beverages, tobacco products or military equipment, the operation of gambling casinos, the production or trade of pornographic materials, or in the oil industry, including extraction, production, and refining or the production, distribution of coal and coal fired generation. To the extent possible on the basis of information available to PIMCO, an issuer will be deemed to be principally engaged in an activity if it derives more than 10% of its gross revenues from such activities. Fund strategies may change from time to time. Please refer to the Fund’s current prospectus for more information regarding the Fund’s strategy.

Fund Insights at NAV

The following affected performance (on a gross basis) during the reporting period:

Table of Contents

PIMCO Enhanced Short Maturity Active Exchange-Traded Fund

Cumulative Returns Through December 31, 2021

$10,000 invested at the end of the month when the Fund commenced operations.

Allocation Breakdown as of December 31, 2021^†§

Average Annual Total Return for the period ended December 31, 2021
				6 Months*				1 Year				5 Year				10 Years				Fund Inception (11/16/2009)
		PIMCO Enhanced Short Maturity Active Exchange-Traded Fund (Based on Net Asset Value)			(0.15)%				0.00%				1.70%				1.48%				1.39%
		PIMCO Enhanced Short Maturity Active Exchange-Traded Fund (At Market Price)(1)			(0.15)%				(0.03)%				1.70%				1.46%				1.39%
		FTSE 3-Month Treasury Bill Index±			0.02%				0.05%				1.11%				0.60%				0.51%¨

All Fund returns are net of fees and expenses and include applicable fee waivers and/or expense limitations. Absent any applicable fee waivers and/or expense limitations, performance would have been lower and there can be no assurance that any such waivers or limitations will continue in the future.

* Cumulative return.

^¨ Average annual total return since 11/30/2009.

Market Returns do not include brokerage commissions that may be payable on secondary market transactions. If brokerage commissions were included, market returns would be lower. Market and NAV returns assume that dividends and capital gain distributions have been reinvested in the Fund at market price and NAV, respectively.

^± FTSE 3-Month Treasury Bill Index is an unmanaged index representing monthly return equivalents of yield averages of the last 3 month Treasury Bill issues.

It is not possible to invest directly in an unmanaged index.

Performance quoted represents past performance. Past performance is not a guarantee or a reliable indicator of future results. Current performance may be lower or higher than performance shown. Investment return and the principal value of an investment will fluctuate. Shares may be worth more or less than original cost when redeemed by authorized participants. Returns shown do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption of Fund shares. Differences in the Fund’s performance versus the index and related attribution information with respect to particular categories of securities or individual positions may be attributable, in part, to differences in the pricing methodologies used by the Fund and the index. Performance data current to the most recent month-end is available at www.pimcoetfs.com or via (888) 400-4ETF.

The Fund’s total annual operating expense ratio in effect as of period end was 0.35%. Details regarding any changes to the Fund’s operating expenses, subsequent to period end, can be found in the Fund’s current prospectus, as supplemented.

Investment Objective and Strategy Overview

PIMCO Enhanced Short Maturity Active Exchange-Traded Fund seeks maximum current income, consistent with preservation of capital and daily liquidity, by investing under normal circumstances at least 80% of its net assets in a diversified portfolio of Fixed Income Instruments of varying maturities, which may be represented by forwards. “Fixed Income Instruments” include bonds, debt securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities. The Fund primarily invests in U.S. dollar-denominated investment grade debt securities, rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or equivalently rated by Standard & Poor’s Ratings Services (“S&P”) or Fitch, Inc. (“Fitch”), or, if unrated, determined by PIMCO to be of comparable quality. The Fund may invest, without limitation, in U.S. dollardenominated securities and instruments of foreign issuers. Fund strategies may change from time to time. Please refer to the Fund’s current prospectus for more information regarding the Fund’s strategy.

Fund Insights at NAV

The following affected performance (on a gross basis) during the reporting period:

Table of Contents

PIMCO Intermediate Municipal Bond Active Exchange-Traded Fund

Cumulative Returns Through December 31, 2021

$10,000 invested at the end of the month when the Fund commenced operations.

Allocation Breakdown as of December 31, 2021^†§

Average Annual Total Return for the period ended December 31, 2021
				6 Months*				1 Year				5 Year				10 Years				Fund Inception (11/30/2009)
		PIMCO Intermediate Municipal Bond Active Exchange-Traded Fund (Based on Net Asset Value)			0.08%				0.79%				3.66%				2.82%				3.26%
		PIMCO Intermediate Municipal Bond Active Exchange-Traded Fund (At Market Price)(1)			(0.08)%				0.68%				3.63%				2.80%				3.25%
		Bloomberg 1-15 Year Municipal Bond Index±			0.29%				0.86%				3.57%				3.05%				3.48%

All Fund returns are net of fees and expenses and include applicable fee waivers and/or expense limitations. Absent any applicable fee waivers and/or expense limitations, performance would have been lower and there can be no assurance that any such waivers or limitations will continue in the future.

* Cumulative return.

Market Returns do not include brokerage commissions that may be payable on secondary market transactions. If brokerage commissions were included, market returns would be lower. Market and NAV returns assume that dividends and capital gain distributions have been reinvested in the Fund at market price and NAV, respectively.

^± Bloomberg 1-15 Year Municipal Bond Index consists of a broad selection of investment grade general obligation and revenue bonds of maturities ranging from one year to 17 years. It is an unmanaged index representative of the tax exempt bond market.

It is not possible to invest directly in an unmanaged index.

Performance quoted represents past performance. Past performance is not a guarantee or a reliable indicator of future results. Current performance may be lower or higher than performance shown. Investment return and the principal value of an investment will fluctuate. Shares may be worth more or less than original cost when redeemed by authorized participants. Returns shown do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption of Fund shares. Differences in the Fund’s performance versus the index and related attribution information with respect to particular categories of securities or individual positions may be attributable, in part, to differences in the pricing methodologies used by the Fund and the index. Performance data current to the most recent month-end is available at www.pimcoetfs.com or via (888) 400-4ETF.

The Fund’s total annual operating expense ratio in effect as of period end was 0.35%. Details regarding any changes to the Fund’s operating expenses, subsequent to period end, can be found in the Fund’s current prospectus, as supplemented.

Investment Objective and Strategy Overview

PIMCO Intermediate Municipal Bond Active Exchange-Traded Fund seeks attractive tax-exempt income, consistent with preservation of capital, by investing under normal circumstances at least 80% of its assets in a diversified portfolio of debt securities whose interest is, in the opinion of bond counsel for the issuer at the time of issuance, exempt from federal income tax (“Municipal Bonds”). Municipal Bonds generally are issued by or on behalf of states and local governments and their agencies, authorities and other instrumentalities. The Fund does not intend to invest in Municipal Bonds whose interest is subject to the federal alternative minimum tax. The Fund may only invest in U.S. dollar-denominated investment grade debt securities, rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or equivalently rated by Standard & Poor’s Ratings Services (“S&P”) or Fitch, Inc. (“Fitch”), or, if unrated, determined by PIMCO to be of comparable quality. The Fund may invest 25% or more of its total assets in Municipal Bonds that finance similar projects, such as those relating to education, health care, housing, transportation, and utilities, and 25% or more of its total assets in industrial development bonds. Fund strategies may change from time to time. Please refer to the Fund’s current prospectus for more information regarding the Fund’s strategy.

Fund Insights at NAV

The following affected performance (on a gross basis) during the reporting period:

Table of Contents

PIMCO Municipal Income Opportunities Active Exchange-Traded Fund

Allocation Breakdown as of December 31, 2021^†§

A line graph is not included since the Fund has less than six months of performance.

All Fund returns are net of fees and expenses and include applicable fee waivers and/or expense limitations. Absent any applicable fee waivers and/or expense limitations, performance would have been lower and there can be no assurance that any such waivers or limitations will continue in the future.

* Cumulative return.

Market Returns do not include brokerage commissions that may be payable on secondary market transactions. If brokerage commissions were included, market returns would be lower. Market and NAV returns assume that dividends and capital gain distributions have been reinvested in the Fund at market price and NAV, respectively.

^± Bloomberg Municipal Bond Index consists of a broad selection of investment-grade general obligation and revenue bonds of maturities ranging from one year to 30 years. It is an unmanaged index representative of the tax-exempt bond market. The index is made up of all investment grade municipal bonds issued after 12/31/90 having a remaining maturity of at least one year.

It is not possible to invest directly in an unmanaged index.

Performance quoted represents past performance. Past performance is not a guarantee or a reliable indicator of future results. Current performance may be lower or higher than performance shown. Investment return and the principal value of an investment will fluctuate. Shares may be worth more or less than original cost when redeemed by authorized participants. Returns shown do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption of Fund shares. Differences in the Fund’s performance versus the index and related attribution information with respect to particular categories of securities or individual positions may be attributable, in part, to differences in the pricing methodologies used by the Fund and the index. Performance data current to the most recent month-end is available at www.pimcoetfs.com or via (888) 400-4ETF.

The Fund’s total annual operating expense ratio in effect as of period end was 0.54%. Details regarding any changes to the Fund’s operating expenses, subsequent to period end, can be found in the Fund’s current prospectus, as supplemented.

Investment Objective and Strategy Overview

PIMCO Municipal Income Opportunities Active Exchange-Traded Fund seeks current income exempt from federal income tax and long-term capital appreciation, by investing under normal circumstances at least 80% of its assets in debt securities whose interest is, in the opinion of bond counsel for the issuer at the time of issuance, exempt from federal income tax (“Municipal Bonds”). Municipal Bonds generally are issued by or on behalf of states and local governments and their agencies, authorities and other instrumentalities. Fund strategies may change from time to time. Please refer to the Fund’s current prospectus for more information regarding the Fund’s strategy.

Fund Insights at NAV

The following affected performance (on a gross basis) during the reporting period:

Table of Contents

PIMCO Short Term Municipal Bond Active Exchange-Traded Fund

Cumulative Returns Through December 31, 2021

$10,000 invested at the end of the month when the Fund commenced operations.

Allocation Breakdown as of December 31, 2021^†§

Average Annual Total Return for the period ended December 31, 2021
				6 Months*				1 Year				5 Year				10 Years				Fund Inception (02/01/2010)
		PIMCO Short Term Municipal Bond Active Exchange-Traded Fund (Based on Net Asset Value)			(0.09)%				0.27%				1.97%				1.25%				1.31%
		PIMCO Short Term Municipal Bond Active Exchange-Traded Fund (At Market Price)(1)			(0.16)%				0.17%				2.02%				1.25%				1.31%
		Bloomberg 1-Year Municipal Bond Index±			0.00%				0.31%				1.44%				1.03%				1.08%

All Fund returns are net of fees and expenses and include applicable fee waivers and/or expense limitations. Absent any applicable fee waivers and/or expense limitations, performance would have been lower and there can be no assurance that any such waivers or limitations will continue in the future.

^* Cumulative return.

Market Returns do not include brokerage commissions that may be payable on secondary market transactions. If brokerage commissions were included, market returns would be lower. Market and NAV returns assume that dividends and capital gain distributions have been reinvested in the Fund at market price and NAV, respectively.

^± The Bloomberg 1-Year Municipal Bond Index is the 1 Year (1-2) component of the Municipal Bond Index. The Index is a rules-based, market-value-weighted index engineered for the long term tax-exempt bond market. To be included in the Index, bonds must be rated investment-grade (Baa3/BBB- or higher) by at least two of the following ratings agencies: Moody’s, S&P and Fitch. If only two of the three agencies rate the security, the lower rating is used to determine index eligibility. If only one of the three agencies rates a security, the rating must be investment-grade. They must have an outstanding par value of at least $7 million and be issued as part of a transaction of at least $75 million. The bonds must be fixed rate, have a dated-date after December 31, 1990, and must be at least one year from their maturity date. Remarketed issues, taxable municipal bonds, bonds with floating rates, and derivatives, are excluded from the benchmark.

It is not possible to invest directly in an unmanaged index.

Performance quoted represents past performance. Past performance is not a guarantee or a reliable indicator of future results. Current performance may be lower or higher than performance shown. Investment return and the principal value of an investment will fluctuate. Shares may be worth more or less than original cost when redeemed by authorized participants. Returns shown do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or on the redemption of Fund shares. Differences in the Fund’s performance versus the index and related attribution information with respect to particular categories of securities or individual positions may be attributable, in part, to differences in the pricing methodologies used by the Fund and the index. Performance data current to the most recent month-end is available at www.pimcoetfs.com or via (888) 400-4ETF.

The Fund’s total annual operating expense ratio in effect as of period end was 0.35%. Details regarding any changes to the Fund’s operating expenses, subsequent to period end, can be found in the Fund’s current prospectus, as supplemented.

Investment Objective and Strategy Overview

PIMCO Short Term Municipal Bond Active Exchange-Traded Fund seeks attractive tax-exempt income, consistent with preservation of capital, by investing under normal circumstances at least 80% of its assets in a diversified portfolio of debt securities whose interest is, in the opinion of bond counsel for the issuer at the time of issuance, exempt from federal income tax (“Municipal Bonds”). Municipal Bonds generally are issued by or on behalf of states and local governments and their agencies, authorities and other instrumentalities. The Fund does not intend to invest in Municipal Bonds whose interest is subject to the federal alternative minimum tax. The Fund may only invest in U.S. dollar-denominated investment grade debt securities, rated Baa or higher by Moody’s Investors Service, Inc. (“Moody’s”), or equivalently rated by Standard & Poor’s Ratings Services (“S&P”) or Fitch, Inc. (“Fitch”), or, if unrated, determined by PIMCO to be of comparable quality. The Fund may invest 25% or more of its total assets in Municipal Bonds that finance similar projects, such as those relating to education, health care, housing, transportation, and utilities, and 25% or more of its total assets in industrial development bonds. Fund strategies may change from time to time. Please refer to the Fund’s current prospectus for more information regarding the Fund’s strategy.

Fund Insights at NAV

The following affected performance (on a gross basis) during the reporting period:

Table of Contents

Example

As a shareholder of a Fund, you incur two types of costs: (1) transaction costs, including brokerage commissions paid on purchases and sales of Fund shares and (2) ongoing costs, management fees and other Fund expenses. The Example is intended to help you understand your ongoing costs (in dollars) of investing in a Fund and to compare these costs with the ongoing costs of investing in other exchange-traded funds.

The Example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period indicated, which for all Funds is from July 1, 2021 to December 31, 2021 unless noted otherwise in the table and footnotes below.

Actual Expenses

The information in the table under the heading “Actual” provides information about actual account values and actual expenses. You may use this information, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.60), then multiply the result by the number in the column titled “Expenses Paid During Period” to estimate the expenses you paid on your account during this period.

Hypothetical Example for Comparison Purposes

The information in the table under the heading “Hypothetical (5% return before expenses)” provides information about hypothetical account values and hypothetical expenses based on a Fund’s actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund’s actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in a Fund and other exchange-traded funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of other exchange-traded funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as brokerage commissions paid on purchases and sales of shares of the Funds. Therefore, the information under the heading “Hypothetical (5% return before expenses)” is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different exchange-traded funds. In addition, if these transactional costs were included, your costs would have been higher.

Expense ratios may vary period to period because of various factors, such as an increase in expenses not covered by the management fees (such as expenses of the independent trustees and their counsel, extraordinary expenses and interest expense).