UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of Earliest Event Reported): November 6, 2015

HUBSPOT, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code (888) 482-7768

Not applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

On November 6, 2015 HubSpot, Inc. (the “Company”) as Guarantor and HubSpot Ireland Limited (“HubSpot Ireland”), a wholly owned subsidiary of the Company, as tenant, entered into an agreement to take an occupational lease from Hibernia REIT Plc (the “Landlord”) (the “Agreement for Lease”) with an agreed form of lease appended to it (the “Lease”) in respect of approximately 27,500 square feet of office space located at One Dockland Central, Guild Street, in Dublin Ireland (the “Premises”). The Agreement for Lease and Lease are together referred to as the “Lease Agreements.”

The Lease will become effective once certain Landlord works in the building have been completed, which is anticipated to occur in mid-December 2015. Once effective, the Lease will run for 20 years, subject to an option for HubSpot Ireland to terminate it early after 10  ¹⁄₂ years for a fee equal to six months’ basic rent.

The estimated initial annual basic rent for the Premises is approximately $1.4 million and is subject to adjustment in connection with rent reviews to be conducted every five years. HubSpot Ireland will receive six months basic rent free upon commencement of the Lease term and, prior to this, will be granted early access for fit out purposes. HubSpot Ireland will be obligated to pay certain costs, service charges and expenses related to the Premises.

The obligations of HubSpot Ireland under the Lease Agreements are guaranteed by the Company.

The foregoing is a brief description of certain of the terms of the Lease Agreements, does not purport to be complete and is qualified in its entirety by reference to the Lease Agreements that will be filed as an exhibit to our annual report on Form 10-K for the year ending December 31, 2015.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.