2seventy bio, Inc.
Total Trades
52
Buys
4
Sells
46
Largest Trade
N/A
Insiders
10
Institutional Funds
2
Inst. Value
$15K–$50K
Activist Filings
26
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Snow Jessica | COO | SELL | $1K–$15K | 2K | $4.95 | Mar 19, 2025 |
| Baird William D III | President and CEO | SELL | $15K–$50K | 5K | $4.95 | Mar 19, 2025 |
| Eatwell Victoria | CFO | SELL | $1K–$15K | 3K | $4.95 | Mar 19, 2025 |
| Kynam Global Healthcare Master Fund, LP | 10% Owner | SELL | $1M+ | 16.2M | $4.93 | Mar 13, 2025 |
| Snow Jessica | See Remarks | SELL | $15K–$50K | 6K | $2.81 | Jan 7, 2025 |
| Leschly Nick | Director | SELL | $100K–$500K | 87K | $2.93 | Jan 7, 2025 |
| Eatwell Victoria | CFO | SELL | $1K–$15K | 1K | $2.92 | Jan 7, 2025 |
| Baird William D III | President and CEO | SELL | $50K–$100K | 32K | $2.93 | Jan 7, 2025 |
| Maus Marcela V. | Director | SELL | $1K–$15K | 4K | $3.38 | Nov 20, 2024 |
| Snow Jessica | See Remarks | SELL | $1K–$15K | 679 | $4.65 | Oct 7, 2024 |
| Eatwell Victoria | CFO | SELL | $1K–$15K | 1K | $4.65 | Oct 7, 2024 |
| Snow Jessica | See Remarks | SELL | $15K–$50K | 8K | $4.32 | Aug 16, 2024 |
| Snow Jessica | See Remarks | SELL | <$1K | 14 | $4.02 | Jul 3, 2024 |
| Snow Jessica | See Remarks | GRANT | N/A | 109K | — | Jul 3, 2024 |
| Eatwell Victoria | CFO | SELL | <$1K | 12 | $4.02 | Jul 3, 2024 |
| Eatwell Victoria | CFO | GRANT | N/A | 246K | — | Jul 3, 2024 |
| Eatwell Victoria | CFO | SELL | $1K–$15K | 1K | $4.18 | Jun 5, 2024 |
| Snow Jessica | See Remarks | SELL | $1K–$15K | 649 | $4.18 | Jun 5, 2024 |
| Casdin Capital, LLC | Director | BUY | $100K–$500K | 40K | $5.10 | Mar 29, 2024 |
| Casdin Capital, LLC | Director | BUY | $1M+ | 777K | $5.02 | Mar 26, 2024 |
| Leschly Nick | President and CEO | SELL | $50K–$100K | 9K | $5.49 | Aug 24, 2023 |
| Gregory Philip D | Chief Scientific O… | SELL | $15K–$50K | 6K | $5.49 | Aug 24, 2023 |
| Baird William D III | CFO | SELL | $15K–$50K | 7K | $5.49 | Aug 24, 2023 |
| Kynam Global Healthcare Master Fund, LP | 10% Owner | BUY | $1M+ | 602K | $5.92 | Aug 16, 2023 |
| Kynam Capital Management, LP | 10% Owner | BUY | $1M+ | 602K | $5.92 | Aug 15, 2023 |
| Leschly Nick | President and CEO | SELL | $50K–$100K | 9K | $6.13 | Aug 7, 2023 |
| Gregory Philip D | Chief Scientific O… | SELL | $15K–$50K | 4K | $6.13 | Aug 7, 2023 |
| Baird William D III | CFO | SELL | $15K–$50K | 7K | $6.13 | Aug 7, 2023 |
| Baird William D III | CFO | SELL | $1K–$15K | 637 | $12.86 | Feb 15, 2023 |
| Heffron Nicola | COO | SELL | <$1K | 60 | $14.70 | Feb 9, 2023 |
| Gregory Philip D | Chief Scientific O… | SELL | $1K–$15K | 1K | $10.63 | Jan 18, 2023 |
| Heffron Nicola | COO | SELL | $1K–$15K | 128 | $10.63 | Jan 18, 2023 |
| Leschly Nick | President and CEO | SELL | $15K–$50K | 2K | $10.63 | Jan 18, 2023 |
| Baird William D III | CFO | SELL | $1K–$15K | 1K | $10.63 | Jan 18, 2023 |
| Leschly Nick | President and CEO | SELL | $50K–$100K | 7K | $10.46 | Jan 17, 2023 |
| Heffron Nicola | COO | SELL | $1K–$15K | 584 | $10.33 | Jan 11, 2023 |
| Gregory Philip D | Chief Scientific O… | SELL | $15K–$50K | 4K | $10.33 | Jan 11, 2023 |
| Baird William D III | CFO | SELL | $15K–$50K | 3K | $10.33 | Jan 11, 2023 |
| Leschly Nick | President and CEO | SELL | $15K–$50K | 3K | $10.33 | Jan 11, 2023 |
| Heffron Nicola | COO | SELL | $1K–$15K | 272 | $15.43 | Dec 6, 2022 |
| Heffron Nicola | COO | SELL | $100K–$500K | 8K | $13.97 | Nov 23, 2022 |
| Baird William D III | CFO | SELL | $50K–$100K | 4K | $16.23 | Aug 8, 2022 |
| Gregory Philip D | Chief Scientific O… | SELL | $15K–$50K | 2K | $16.23 | Aug 8, 2022 |
| Leschly Nick | President and CEO | SELL | $50K–$100K | 5K | $16.23 | Aug 8, 2022 |
| Baird William D III | CFO | SELL | $50K–$100K | 4K | $13.81 | Jul 19, 2022 |
| Gregory Philip D | Chief Scientific O… | SELL | $15K–$50K | 2K | $13.81 | Jul 19, 2022 |
| Leschly Nick | President and CEO | SELL | $50K–$100K | 5K | $13.81 | Jul 19, 2022 |
| Baird William D III | CFO | SELL | $1K–$15K | 427 | $14.78 | Feb 22, 2022 |
| Heffron Nicola | COO | SELL | $15K–$50K | 2K | $15.88 | Feb 8, 2022 |
| Baird William D III | CFO | SELL | $15K–$50K | 896 | $23.91 | Jan 11, 2022 |
Institutional Ownership
13F filings as of Jun 30, 2025 · 2 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| OSAIC HOLDINGS, INC. | 3K | $15K–$50K | SH |
| IFP Advisors, Inc | 0 | <$1K | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G/A · Aug 14, 2025
0.0%
0 shares
SC 13G/A · Aug 14, 2025
0.0%
0 shares
SC 13G/A · Aug 13, 2025
0.0%
308 shares
SC 13G/A · Jun 6, 2025
0.0%
0 shares
SC 13G/A · Apr 30, 2025
5.4%
2.8M shares
SC 13G · Apr 15, 2025
5.3%
2.8M shares
SC 13G · Mar 18, 2025
8.1%
4.3M shares
SC 13G/A · Mar 17, 2025
0.0%
0 shares
Morgan Stanley I.R.S. # 36-3145972
SC 13G/A · Nov 6, 2024
5.5%
2.8M shares
SC 13G/A · Feb 14, 2024
0.0%
6 shares
SC 13G/A · Feb 14, 2024
5.0%
2.5M shares
Morgan Stanley I.R.S. # 36-3145972
SC 13G · Feb 12, 2024
9.4%
4.7M shares
SC 13G/A · Feb 1, 2024
4.7%
2.4M shares
SC 13G/A · Jan 26, 2024
7.7%
3.9M shares
STATE STREET CORPORATION I.R.S. IDENTIFICATION NO. OF THE ABOVE PERSON 04-2456637
SC 13G/A · Jan 23, 2024
1.9%
0 shares
Wellington Management Group LLP
SC 13G/A · Nov 9, 2023
1.6%
803K shares
STATE STREET CORPORATION I.R.S. IDENTIFICATION NO. OF THE ABOVE PERSON 04-2456637
SC 13G/A · Oct 10, 2023
2.1%
0 shares
Kynam Global Healthcare Master Fund, LP
SC 13G · Sep 6, 2023
10.1%
5.1M shares
SC 13G · May 15, 2023
5.0%
2.5M shares
SC 13G · May 1, 2023
4.1%
6 shares
SC 13G · Feb 14, 2023
5.4%
2.1M shares
SC 13G/A · Feb 14, 2023
3.0%
1.1M shares
SC 13G · Feb 3, 2023
7.9%
3.0M shares
SC 13G/A · Apr 8, 2022
4.2%
1.6M shares
SC 13G/A · Feb 14, 2022
8.2%
1.9M shares
STATE STREET CORPORATION I.R.S. IDENTIFICATION NO. OF THE ABOVE PERSON 04-2456637
SC 13G · Jan 10, 2022
10.1%
0 shares