SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Kynam Capital Management, LP (Last) (First) (Middle) 221 ELM ROAD (Street) PRINCETON NJ 08540 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 08/10/2023	3. Issuer Name and Ticker or Trading Symbol 2seventy bio, Inc. [ TSVT ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock, par value $0.0001 per share	5,524,825	I	See Footnote(1)
Common Stock, par value $0.0001 per share	5,055,697(2)	D(3)
Common Stock, par value $0.0001 per share	5,055,697(2)	I	See Footnote(4)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The reported securities are owned directly by Kynam Global Healthcare Master Fund, LP (the "Master Fund"), a private investment fund managed by Kynam Capital Management, LP (the "Adviser"), and separately managed account clients of the Adviser and may be deemed to be indirectly beneficially owned by (i) the Adviser, (ii) Kynam Capital Management GP, LLC (the "Adviser GP"), the general partner of the Adviser and (iii) Yue Tang, the managing member of the Adviser GP. The Reporting Persons disclaim beneficial ownership of the reported securities except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Persons are the beneficial owners of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

2. At the time the Master Fund became a Reporting Person on this Form 3, the Master Fund and separately managed account clients of the Adviser collectively directly owned 5,853,825 shares of Common Stock, par value $0.0001 per share of 2seventy bio, Inc. and the Adviser, the Adviser GP and Yue Tang may have been deemed to indirectly beneficially owned 5,853,825 shares of Common Stock, par value $0.0001 per share of 2seventy bio, Inc. Reference is made to the Form 4 filed by the Reporting Persons on August 14, 2023. The Reporting Persons disclaim beneficial ownership of the reported securities except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Persons are the beneficial owners of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

3. The reported securities are directly owned by the Master Fund. The Reporting Persons disclaim beneficial ownership of the reported securities except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Persons are the beneficial owners of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

4. The reported securities are owned directly by the Master Fund and may be deemed to be indirectly beneficially owned by Kynam Fund GP, LLC, the general partner of the Master Fund. The Reporting Persons disclaim beneficial ownership of the reported securities except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Persons are the beneficial owners of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose

	KYNAM CAPITAL MANAGEMENT, LP, By: KYNAM CAPITAL MANAGEMENT GP, LLC, By: /s/ Yue Tang, Yue Tang, Managing Member	08/14/2023
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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