Security key
901384107
2seventy bio, Inc. - Common Stock, par value $0.0001 per share (TSVT)
CUSIP: 901384107
Q1 2025 13F Holders as of 31 Mar 2025
- Security type / class
- Equity / Common Stock, par value $0.0001 per share
- Total 13F shares
- 47,343,776
- Total 13F value
- $233,886,428
- Share change
- +1,393,204
- Put/Call ratio
- 6.5%
- SEC-reported price per share
- $4.94
- Number of holders
- 135
- Value change
- +$26,350,036
- Number of buys
- 62
- Number of sells
- 62
- Shares outstanding
- 52,406,487
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2025
Institutions
135
Top holders
10
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
Reporting periods
Holder history for CUSIP 901384107
Recent filing periods:
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
VANGUARD GROUP INC
Disclosed value leader
Kynam Capital Management, LP
Comparable rows
15/15
Latest evidence
31 Mar 2025
13D/G
13F
3/4/5
Lead comparable stake: 5.4%
13D/G row: VANGUARD GROUP INC
Showing 1-6 of 15 holder rows.
Quick read
VANGUARD GROUP INC leads the comparable SEC ownership view at 5.4%.
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 VANGUARD GROUP INC's linked filing trail.
Comparable ownership
Top 5
VANGUARD GROUP INC
5.4%
Kynam Capital Management, LP
11%
GOLDMAN SACHS GROUP INC
8.2%
BlackRock, Inc.
8.1%
MORGAN STANLEY
5.6%
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 |
|---|---|---|---|---|---|
| VANGUARD GROUP INC |
13D/G
13F
The Vanguard Group · Company
|
5.4%
|
$14,069,150
2,819,469 shares
|
$0 | 31 Mar 2025 |
| Kynam Capital Management, LP |
3/4/5
13F
10%+ Owner · Company
|
11%
from 13F
|
$61,293,964
10,284,222 shares
|
— | 10 Aug 2023 |
| GOLDMAN SACHS GROUP INC |
13F
Company
|
8.2%
|
$12,627,009
4,294,901 shares
|
— | 31 Dec 2024 |
| BlackRock, Inc. |
13F
Company
|
8.1%
|
$12,414,602
4,222,654 shares
|
— | 31 Dec 2024 |
| MORGAN STANLEY |
13F
Company
|
5.6%
|
$8,578,581
2,917,884 shares
|
— | 31 Dec 2024 |
| Newtyn Management, LLC |
13F
Company
|
4.8%
|
$7,452,418
2,534,836 shares
|
— | 31 Dec 2024 |
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 Q1 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
135
Shares
47,343,776
Rows available
135
| 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 Q1 2025 vs Q3 2025 Across Filers
Q3 2025 holders
0
Q1 2025 holders
135
Holder diff
135
| Investor | Q3 2025 Shares | Q1 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q1 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend