[SCHEDULE 13G/A] 2seventy bio, Inc. SEC Filing

Rhea-AI Filing Summary

Glazer Capital, LLC and Paul J. Glazer filed a Schedule 13G/A regarding 2seventy bio's common stock. The filing discloses that neither Glazer Capital nor Mr. Glazer beneficially own any shares of the company's common stock, reporting 0 shares (0.00%) and no sole or shared voting or dispositive power. The statement classifies Glazer Capital as an investment adviser/other and Mr. Glazer as an individual reporting person, and includes a certification that the securities were not acquired to influence control of the issuer. This filing is a routine ownership disclosure rather than an acquisition or control notice.

Insights

Securities Analyst

TL;DR: Filing shows no ownership stake; neutral for 2seventy bio investors.

The Schedule 13G/A reports that Glazer Capital and Paul J. Glazer hold 0 shares (0.00%) and have no voting or dispositive power. From a market-impact perspective, this is a neutral disclosure: it neither signals accumulation nor divestiture by these reporting persons. The filing demonstrates compliance with SEC disclosure requirements and clarifies that these parties are not participants in control transactions. No balance-sheet, revenue, or operational data are affected by this statement.

Corporate Governance Expert

TL;DR: Disclosure confirms no governance influence by the filers; no governance risk introduced.

The document explicitly states the reporting persons possess no voting or dispositive power over the issuer's shares and includes a certification that holdings were not acquired to influence control. For governance analysis, this removes any immediate concern about an activist or control-seeking stake from these parties. The filing is procedural and informative, providing clarity on ownership but not altering the company's governance profile.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

2seventy bio, Inc.

(Name of Issuer)

Common Stock, par value $0.0001 per share

(Title of Class of Securities)

901384107

(CUSIP Number)

06/30/2025

(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)

SCHEDULE 13G

CUSIP No. 901384107

1

Names of Reporting Persons

Glazer Capital, LLC

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 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0.00 %

12

Type of Reporting Person (See Instructions)

IA, OO

SCHEDULE 13G

CUSIP No. 901384107

1

Names of Reporting Persons

Paul J. Glazer

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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0.00 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: 2seventy bio, Inc.
(b)	Address of issuer's principal executive offices: 60 BINNEY STREET, CAMBRIDGE, MA, 02210
Item 2.
(a)	Name of person filing: This statement is filed by: (i) Glazer Capital, LLC, a Delaware limited liability company ("Glazer Capital"), with respect to the shares of Common Stock (as defined in Item 2(d)) held by certain funds and managed accounts to which Glazer Capital serves as investment manager (collectively, the "Glazer Funds"); and (ii) Mr. Paul J. Glazer ("Mr. Glazer"), who serves as the Managing Member of Glazer Capital, with respect to the shares of Common Stock held by the Glazer Funds. The foregoing persons are hereinafter sometimes collectively referred to as the "Reporting Persons." The filing of this statement should not be construed as an admission that any of the Reporting Persons is, for the purposes of Section 13 of the Act, the beneficial owner of the shares of Common Stock (as defined in Item 2(d)) reported herein.
(b)	Address or principal business office or, if none, residence: The address of the business office of each of the Reporting Persons is 250 West 55th Street, Suite 30A, New York, New York 10019.
(c)	Citizenship: Glazer Capital is a Delaware limited liability company. Mr. Glazer is a United States citizen.
(d)	Title of class of securities: Common Stock, par value $0.0001 per share
(e)	CUSIP No.: 901384107
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: 0.00
(b)	Percent of class: 0.00 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 0.00
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 0.00
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.
	Not Applicable
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 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.

Glazer Capital, LLC

Signature:	Paul J. Glazer
Name/Title:	Paul J. Glazer, Managing Member
Date:	08/14/2025

Paul J. Glazer

Signature:	Paul J. Glazer
Name/Title:	Paul J. Glazer
Date:	08/14/2025