How many institutions held TSVT - 2seventy bio, Inc. - Common Stock, par value $0.0001 per share in Q4 2023?

113 institutional investors reported TSVT - 2seventy bio, Inc. - Common Stock, par value $0.0001 per share for Q4 2023. Use the holders table for investor-level position and value details.

2seventy bio, Inc. - Common Stock, par value $0.0001 per share (TSVT)

Q: What does CUSIP 901384107 represent in this 13F holders report?

CUSIP 901384107 is the security identifier for TSVT - 2seventy bio, Inc. - Common Stock, par value $0.0001 per share used to aggregate holder disclosures.

CUSIP: 901384107

Q4 2023 13F Holders as of 31 Dec 2023

Security type / class: Equity / Common Stock, par value $0.0001 per share
Total 13F shares: 48,194,986
Total 13F value: $205,771,368
Share change: -5,486,043
Put/Call ratio: 137%
SEC-reported price per share: $4.27
Number of holders: 113
Value change: -$19,985,874
Number of buys: 44
Number of sells: 77
Shares outstanding: 52,406,487

Security key

901384107

Report period

Q4 2023

Institutions

113

Top holders

TSVT full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 2025 2seventy bio, Inc. SEC filings 2seventy bio, Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 901384107

Newer quarter: Q3 2025

Recent filing periods:

Q4 2025 Q3 2025

Ownership snapshot

Top reported holders of TSVT - 2seventy bio, Inc. - Common Stock, par value $0.0001 per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

Kynam Capital Management, LP

Disclosed value leader

Kynam Capital Management, LP

Comparable rows

15/15

Latest evidence

30 Sep 2023

3/4/5 13F Lead comparable stake: 11% Showing 1-6 of 15 holder rows.

Quick read

Kynam Capital Management, LP leads the comparable SEC ownership view at 11%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Kynam Capital Management, LP's linked filing trail.

Comparable ownership Top 5

Kynam Capital Management, LP 11%

BlackRock Finance, Inc. 8.4%

VANGUARD GROUP INC 7.1%

MILLENNIUM MANAGEMENT LLC 7%

Newtyn Management, LLC 5.9%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Kynam Capital Management, LP	3/4/5 13F 10%+ Owner · Company 3/4/5 13F	11% from 13F	$61,293,964 10,284,222 shares	—	10 Aug 2023
BlackRock Finance, Inc.	13F Company 13F	8.4%	$17,309,971 4,415,809 shares	—	30 Sep 2023
VANGUARD GROUP INC	13F Company 13F	7.1%	$14,636,798 3,733,877 shares	—	30 Sep 2023
MILLENNIUM MANAGEMENT LLC	13F Company 13F	7%	$14,304,727 3,649,165 shares	—	30 Sep 2023
Newtyn Management, LLC	13F Company 13F	5.9%	$12,059,841 3,076,490 shares	—	30 Sep 2023
WELLINGTON MANAGEMENT GROUP LLP	13F Company 13F	5.7%	$11,738,326 2,994,471 shares	—	30 Sep 2023

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q4 2023

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

113

48,194,986

Rows available

113

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q4 2023 vs Q3 2025 Across Filers

Q3 2025 holders

Q4 2023 holders

113

Holder diff

113

Investor	Q3 2025 Shares	Q4 2023 Shares	Share Diff	Share Chg %	Q3 2025 value	Q4 2023 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend