13D Filings
Senti Biosciences, Inc.
SNTI
Amendment
Ownership

17.82%

Total Shares

6,142,848

Issuer CIK

1854270

Event Date

Mar 26, 2026

Accepted

Apr 16, 2026, 04:50 PM

Reporting Persons (4)
Joint Filing

This is a joint filing. The reported shares may overlap between reporting persons and should not be summed.

NameType% of ClassAggregateSole VotingShared Voting
Bayer HealthCare LLC
CO
17.82%6,142,84806,142,848
Bayer US Holding LLC
CO
17.82%6,142,84806,142,848
Sebastian Guth
Individual
17.82%6,142,84806,142,848
Priyal Patel
Individual
17.82%6,142,84806,142,848
Disclosure Items (4)

Security Title

Common Stock, par value $0.0001 per share

Issuer Name

Senti Biosciences, Inc.

Issuer Address

2 Corporate Drive, South San Francisco, CA, 94080

Filing Persons

Bayer HealthCare LLC ("BHC"); Bayer US Holding LLC ("BUSH LLC"); Sebsatian Guth ("Guth") and Priyal Patel ("Patel", together with Guth, the "Managers of BUSH LLC" and collectively, the Managers of BUSH LLC, along with BHC and BUSH LLC, the "Reporting Persons").

Citizenship

BHC - Delaware BUSH LLC - Delaware Guth - Unknown Patel - Unknown

Percentage of Class

BHC - 17.82% BUSH LLC - 17.82% Guth - 17.82% Patel - 17.82% Each Reporting Person disclaims beneficial ownership of the shares other than those shares which such person owns of record. The percentage of outstanding Issuer Common Stock which may be deemed to be beneficially owned by each Reporting Person is set forth on Line 13 of such Reporting Person's cover sheet. Such percentage was calculated based on 31,144,497 shares of Issuer Common Stock reported to be outstanding as of March 19, 2026 on the Issuer's Annual Report on Form 10-K for the period ended December 31, 2025, as filed with the SEC on March 27, 2026.

Number of Shares

Regarding the number of shares as to which such person has: (i) sole power to vote or to direct the vote: See line 7 of cover sheets. (ii) shared power to vote or to direct the vote: See line 8 of cover sheets. (iii) sole power to dispose or to direct the disposition: See line 9 of cover sheets. (iv) shared power to dispose or to direct the disposition: See line 10 of cover sheets.

Exhibit 7.01 - Joint Filing Agreement by and among the Reporting Persons (incorporated by reference to Exhibit 7.01 of the Schedule 13D filed with the SEC on March 17, 2025). Exhibit 7.02 - Power of Attorney regarding filings under the Securities Exchange Act of 1934, as amended (incorporated by reference to Exhibit 7.02 of the Schedule 13D filed with the SEC on March 17, 2025). Exhibit 7.02(a) - Power of Attorney regarding filings under the Securities Exchange Act of 1334, as amended. Exhibit 7.03 - Certificate of Designation of Preferences, Rights and Limitations of the Series A Convertible Preferred Stock (incorporated by reference to Exhibit 3.1 to the Issuer's Current Report on Form 8-K (File No.001-40440), filed on December 2, 2024). Exhibit 7.04 - Form of Warrant to Purchase Common Stock (incorporated by reference to Exhibit 4.1 to the Issuer's Current Report on Form 8-K (File No.001-40440), filed on December 2, 2024). Exhibit 7.05 - Form of Securities Purchase Agreement, dated December 2, 2024, by and among Senti Biosciences, Inc. and the purchasers named therein (incorporated by reference to Exhibit 10.1 to the Issuer's Current Report on Form 8-K (File No.001-40440), filed on December 2, 2024). Exhibit 7.06 - Registration Rights Agreement (incorporated by reference to Exhibit 10.2 to the Issuer's Current Report on Form 8-K (File No.001-40440), filed on December 2, 2024).

Senti Biosciences, Inc. — Schedule 13D | 13D Filings