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Senti Biosciences (NASDAQ: SNTI) halves Alameda space and resets lease with GeneFab

Filing Impact
(High)
Filing Sentiment
(Neutral)
Form Type
8-K

Rhea-AI Filing Summary

Senti Biosciences, Inc. entered into a series of agreements to restructure its facility lease and related sublease for its Alameda, California premises. Effective September 1, 2025, the company will reduce its leased space from approximately 91,910 to 45,955 rentable square feet, cutting its proportionate share of operating expenses and taxes to 50% while keeping responsibility for all utilities until the surrendered space is re-let.

The amended lease sets stepped monthly base rent for the remaining premises, starting at $188,311 from September 1, 2025 through July 31, 2026 and rising over time to $293,010 for August 2022. As consideration for this rent reduction, the landlord may draw $2.0 million on the company’s existing $2.76 million letter of credit, after which the required letter of credit amount drops to $760,000.

The company also amended its sublease with GeneFab, LLC so the subleased space and GeneFab’s payment obligations mirror the amended lease economics, and entered into a consent and letter agreement. GeneFab will pay a $1.0 million reduction fee to the landlord and has $1,374,005 of outstanding base rent that can be satisfied through a prepayment credit for future work or services, with any unpaid portion due by September 1, 2026. GeneFab’s failure to perform on these obligations constitutes an immediate event of default under the amended sublease.

Positive

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Negative

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Insights

Senti restructures its Alameda facility lease, trading a letter-of-credit draw and fees for smaller space and matched sublease terms.

Senti Biosciences is halving its Alameda leased space to 45,955 rentable square feet effective September 1, 2025, with a corresponding reduction in its share of operating expenses and taxes to 50%. Monthly base rent for the remaining premises starts at $188,311 and increases in steps through August 2032, aligning facility costs with a smaller footprint.

In exchange for the rent reduction, the landlord can draw $2.0 million from an existing $2.76 million letter of credit, after which the required amount falls to $760,000. A separate consent and letter agreement tie GeneFab’s amended sublease directly to the amended lease economics, including a $1.0 million reduction fee and $1,374,005 of outstanding base rent handled via prepayment credits or cash by September 1, 2026. These structures shift some financial burden and performance risk to GeneFab while giving Senti more predictable occupancy costs.

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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): March 17, 2026
___________________________________
SENTI BIOSCIENCES, INC.
(Exact name of Registrant as specified in its charter)
___________________________________
Delaware001-4044086-2437900
(State or other jurisdiction
of incorporation)
(Commission
File Number)
(IRS Employer
Identification No.)
2 Corporate Drive, First Floor
South San Francisco, California 94080
(Address of principal executive offices including zip code)
Registrant’s telephone number, including area code: (650) 239-2030

(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:
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Securities registered pursuant to Section 12(b) of the Act:
Title of each class
Trading
Symbol
Name of each exchange
on which registered
Common Stock, par value $0.0001 per shareSNTI
The Nasdaq Capital Market
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
Emerging growth company
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.


Item 1.01 – Entry into a Material Definitive Agreement.

Lease Amendment
On March 17, 2026, Senti Biosciences, Inc. (the “Company”) entered into a First Amendment to Lease (the “Lease Amendment”), which amended that certain Research and Development and Laboratory Lease Agreement dated June 3, 2021 (the “Original Lease Agreement” and the Original Lease Agreement as amended by the Lease Amendment, the “Amended Lease”) by and between the Company and 1430 South Loop Owner, LLC (the “Landlord”) for the Company’s premises located at 1430 Harbor Bay Parkway, Alameda, California.
Pursuant to the Lease Amendment, which is effective as of September 1, 2025 (the “Effective Date”), the Company has agreed to a reduction of the leased premises from approximately 91,910 rentable square feet to approximately 45,955 rentable square feet as of the Effective Date.
As of the Effective Date, the Lease Amendment reduces the monthly base rent under the Amended Lease for the remaining premises to $188,311 from September 1, 2025 through July 31, 2026, $193,960 from August 1, 2026 through July 31, 2027, $252,752 from August 1, 2027 through July 31, 2028, $260,336 from August 1, 2028 through July 31, 2029, $268,145 from August 1, 2029 through July 31, 2030, $276,189 from August 1, 2030 through July 31, 2031, $284,475 from August 1, 2031 through July 31, 2032, and $293,010 from August 1, 2032 through August 31, 2032 (together the “Rent Reduction”). The Company’s proportionate share of operating expenses and taxes was reduced to 50% as of the Effective Date; however, the Company will continue to be responsible for 100% of utilities for the building until the surrendered space is re-let to a third party.
In connection with the Lease Amendment, the Landlord is entitled to draw $2.0 million from the Company’s existing $2.76 million letter of credit as consideration for the Rent Reduction, after which the required letter of credit amount for the remainder of the lease term will be reduced to $760,000.
Sublease Amendment
On March 17, 2026, the Company entered into a First Amendment to Sublease (the “Sublease Amendment”), which amended and restated that certain Sublease Agreement dated August 7, 2023 (the “Original Sublease Agreement” and the Original Sublease Agreement as amended by the Sublease Amendment, the “Amended Sublease”) by and between the Company, as sublandlord, and GeneFab, LLC (“GeneFab”) as subtenant.
Pursuant to the Sublease Amendment, which was effective as of the Effective Date, the subleased premises were reduced to approximately 45,955 rentable square feet as of the Effective Date. The Sublease Amendment revised the base rent, operating expenses, taxes and utilities owed by GeneFab under the Amended Sublease to equal the amounts owed by the Company under the Amended Lease. In addition, GeneFab agreed to pay the Reduction Fee (as defined below) to the Landlord pursuant to the terms and conditions of the Consent Amendment (as defined below).
Landlord Consent
In connection with Lease Amendment and the Sublease Amendment, on March 17, 2026, the Company entered into a First Amendment to Landlord’s Consent to Sublease (the “Consent Amendment”) among the Company, the Landlord and GeneFab, which was effective as of the Effective Date. Pursuant to the Consent Amendment, the Landlord consented to the Sublease Amendment in consideration for the payment by the Company or GeneFab of $1.0 million to the Landlord (the “Reduction Fee”).
Letter Agreement
In connection with Lease Amendment, the Sublease Amendment and the Consent Amendment, on March 17, 2026, the Company entered into a letter agreement with GeneFab (the “Letter Agreement”), effective as of the Effective Date. The Letter Agreement provides, among other things, that the outstanding base rent of $1,374,005 owed by GeneFab to the Company may be satisfied, in whole or in part, through a cash prepayment credit to be applied toward work or services to be performed by GeneFab for the Company under a separate arrangement, that the Company may access such prepayment credit as of the Effective Date and that any unpaid portion must be paid in immediately available funds by September 1, 2026.



The Letter Agreement further provides that, if the Landlord draws $2.0 million on the Company’s letter of credit as contemplated by the Lease Amendment, the Company may access an equivalent amount as a prepayment credit to be applied toward GeneFab’s performance beginning September 1, 2026. GeneFab’s failure to perform its obligations with respect to the outstanding rent or the $2.0 million amount constitutes an immediate event of default under the Amended Sublease, and that the Letter Agreement terminates automatically once the applicable prepayment credit has been fully applied.
The foregoing descriptions of the Lease Amendment, the Sublease Amendment, the Consent Amendment and the Letter Agreement do not purport to be complete and are qualified in their entirety by reference to the full text of each such agreement, copies of which the Company expects to file as exhibits to its quarterly report on Form 10-Q for the quarter ended March 31, 2026.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit No.Description
104Cover Page Interactive Data File (embedded within the Inline XBRL document)



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.

SENTI BIOSCIENCES, INC.
Date:March 19, 2026By:/s/ Timothy Lu
Name:Timothy Lu, M.D., Ph.D.
Title:Chief Executive Officer and President


FAQ

What lease changes did Senti Biosciences (SNTI) make in Alameda?

Senti Biosciences cut its Alameda leased space to 45,955 rentable square feet effective September 1, 2025. The amendment also reduces its share of operating expenses and taxes to 50% while setting stepped monthly base rent through August 2032.

How does the amended lease affect Senti Biosciences’ rent obligations?

For the remaining space, monthly base rent is $188,311 from September 1, 2025 to July 31, 2026, then increases in steps, reaching $293,010 for August 2032. These fixed amounts define Senti’s base occupancy cost over the amended lease term.

What happens to Senti Biosciences’ letter of credit under the lease amendment?

The landlord may draw $2.0 million from Senti’s existing $2.76 million letter of credit as consideration for the rent reduction. After this draw, the required letter of credit amount for the remainder of the lease term falls to $760,000.

How was the GeneFab sublease changed in Senti Biosciences’ 8-K?

The GeneFab sublease was amended so the subleased premises are also 45,955 rentable square feet from the effective date, and GeneFab’s base rent, operating expenses, taxes, and utilities match the amounts owed by Senti under the amended master lease.

What is the $1.0 million Reduction Fee in the Senti Biosciences filing?

Under the consent amendment, the landlord agreed to the sublease changes in return for a $1.0 million Reduction Fee. This amount is payable to the landlord by Senti or GeneFab, with the documents specifying that GeneFab agreed to pay this fee.

How is GeneFab’s outstanding rent to Senti Biosciences being handled?

GeneFab’s outstanding base rent of $1,374,005 can be satisfied through a prepayment credit for work or services performed for Senti. Any unpaid portion must be paid in immediately available funds by September 1, 2026, and nonperformance is an event of default.

What additional prepayment credit may Senti Biosciences receive related to GeneFab?

If the landlord draws $2.0 million on Senti’s letter of credit, Senti may access an equivalent $2.0 million prepayment credit for GeneFab’s performance starting September 1, 2026. This credit is tied to GeneFab’s future work or services under a separate arrangement.

Filing Exhibits & Attachments

3 documents
Senti Bioscience

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23.68M
11.38M
Biotechnology
Biological Products, (no Diagnostic Substances)
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United States
SOUTH SAN FRANCISCO