Adicet Bio reported a Schedule 13G/A amendment showing that Woodline Partners beneficially owns 313,124 shares of common stock, representing 3.3% of the class. The filing cites March 10, 2026 as the outstanding-share anchor of 9,596,407 shares.
The statement lists sole voting and dispositive power over the 313,124 shares by the Woodline Fund. The filing is a passive ownership disclosure filed under the ownership threshold rules rather than an active acquisition or disposition report.
Positive
None.
Negative
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Insights
Woodline reports a passive 3.3% stake in Adicet Bio.
Woodline Partners discloses beneficial ownership of 313,124 shares with sole voting and dispositive power. The percentage is calculated using the issuer's reported outstanding shares of 9,596,407 as of March 10, 2026.
Because this is a Schedule 13G/A amendment, it indicates passive investor status under applicable rules. Subsequent filings would show any change in position or a move to an active filing status.
Filing is a regulatory disclosure of ownership, not an operational action.
The amendment clarifies beneficial ownership and voting/dispositive powers for compliance with Section 13 reporting. It cites a specific outstanding-share figure from the company’s Form 10-K for calculation purposes.
Key compliance elements: CUSIP is provided, the reporting person is named, and signature by counsel certifies the amendment. No proceeds or transactions are disclosed in the excerpt.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 1)
Adicet Bio, Inc.
(Name of Issuer)
Common Stock, par value $0.0001 per share
(Title of Class of Securities)
007002207
(CUSIP Number)
03/31/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
007002207
1
Names of Reporting Persons
Woodline Partners LP
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
313,124.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
313,124.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
313,124.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
3.3 %
12
Type of Reporting Person (See Instructions)
IA, PN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Adicet Bio, Inc.
(b)
Address of issuer's principal executive offices:
131 Dartmouth Street, 3rd Floor, Boston, MA 02116
Item 2.
(a)
Name of person filing:
This statement is filed by Woodline Partners LP ("Woodline Partners" or the "Reporting Person"), a Delaware limited partnership, and the investment adviser to Woodline Master Fund LP (the "Woodline Fund"), with respect to the shares of common stock, par value $0.0001 per share ("Common Stock"), of Adicet Bio, Inc. (the "Company") directly held by the Woodline Fund.
The filing of this statement should not be construed as an admission that any of the foregoing persons or the Reporting Person is, for the purposes of Section 13 of the Securities Exchange Act of 1934, the beneficial owner of the shares of Common Stock reported herein.
(b)
Address or principal business office or, if none, residence:
The address of the business office of Woodline Partners is 4 Embarcadero Center, Suite 3450, San Francisco, CA 94111.
(c)
Citizenship:
Woodline Partners is a Delaware limited partnership.
(d)
Title of class of securities:
Common Stock, par value $0.0001 per share
(e)
CUSIP No.:
007002207
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
The information required by Item 4(a) is set forth in Row 9 of the cover page for the Reporting Person and is incorporated herein by reference.
The percentage set forth in this Schedule 13G is calculated based upon an aggregate of 9,596,407 shares of Common Stock outstanding as of March 10, 2026, as reported in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2025, filed with the Securities and Exchange Commission on March 12, 2026.
(b)
Percent of class:
3.3%
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for the Reporting Person and is incorporated herein by reference.
(ii) Shared power to vote or to direct the vote:
The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for the Reporting Person and is incorporated herein by reference.
(iii) Sole power to dispose or to direct the disposition of:
The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for the Reporting Person and is incorporated herein by reference.
(iv) Shared power to dispose or to direct the disposition of:
The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for the Reporting Person and is incorporated herein by reference.
Item 5.
Ownership of 5 Percent or Less of a Class.
Ownership of 5 percent or less of a class
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
See Item 2(a).
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
Woodline Partners LP
Signature:
/s/ Erin Mullen
Name/Title:
Erin Mullen, General Counsel & Chief Compliance Officer
What stake does Woodline Partners report in Adicet Bio (ACET)?
Woodline Partners reports beneficial ownership of 313,124 shares, equal to 3.3% of Adicet Bio's common stock. The percentage uses an outstanding share base of 9,596,407 shares as of March 10, 2026, cited from the company 10-K.
Does the filing show Woodline has voting control over its ACET shares?
Yes. The amendment states Woodline has sole voting power and sole dispositive power over 313,124 shares. The filing attributes both voting and disposition authority to the Reporting Person for the shares held by the Woodline Fund.
Is this Schedule 13G/A an active trade or a passive ownership report for ACET?
This Schedule 13G/A amendment is a passive ownership disclosure. It amends prior ownership information to report current beneficial holdings and does not itself disclose any purchase or sale transactions in Adicet Bio common stock.
What outstanding-share figure does the filing use to compute the 3.3% stake?
The filing calculates the 3.3% figure using 9,596,407 shares outstanding as of March 10, 2026, which is taken from Adicet Bio's Annual Report on Form 10-K for the fiscal year ended December 31, 2025.
