89bio, Inc.
Total Trades
37
Buys
7
Sells
21
Largest Trade
$1M+
Insiders
10
Institutional Funds
2
Inst. Value
$1M+
Activist Filings
50
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Le-Nguyen Quoc | See Remarks | SELL | $100K–$500K | 10K | $11.02 | Jul 17, 2025 |
| Le-Nguyen Quoc | See Remarks | SELL | $50K–$100K | 15K | $5.95 | Apr 17, 2025 |
| McWherter Charles | Director | BUY | $50K–$100K | 15K | $6.66 | Jan 24, 2025 |
| Le-Nguyen Quoc | See Remarks | SELL | $50K–$100K | 11K | $6.49 | Jan 17, 2025 |
| PALEKAR ROHAN | CEO | BUY | $50K–$100K | 10K | $8.35 | Nov 25, 2024 |
| Le-Nguyen Quoc | See Remarks | SELL | $100K–$500K | 28K | $8.12 | Nov 1, 2024 |
| PALEKAR ROHAN | CEO | EXERCISE | $15K–$50K | 25K | $1.93 | Apr 3, 2024 |
| PALEKAR ROHAN | CEO | SELL | $500K+ | 53K | $10.91 | Apr 3, 2024 |
| PALEKAR ROHAN | CEO | SELL | $15K–$50K | 4K | $10.76 | Feb 28, 2024 |
| PALEKAR ROHAN | CEO | SELL | $500K+ | 50K | $11.20 | Jan 3, 2024 |
| PALEKAR ROHAN | CEO | EXERCISE | $50K–$100K | 50K | $1.93 | Jan 3, 2024 |
| LAPORTE KATHLEEN | Director | SELL | $100K–$500K | 13K | $18.80 | Jul 18, 2023 |
| LAPORTE KATHLEEN | Director | EXERCISE | $15K–$50K | 13K | $2.64 | Jul 18, 2023 |
| PALEKAR ROHAN | CEO | SELL | $100K–$500K | 15K | $20.00 | Jun 7, 2023 |
| PALEKAR ROHAN | CEO | EXERCISE | $15K–$50K | 15K | $1.93 | Jun 7, 2023 |
| Atkinson Edward Morrow III | Director | EXERCISE | $15K–$50K | 6K | $2.61 | Jun 5, 2023 |
| Atkinson Edward Morrow III | Director | SELL | $100K–$500K | 6K | $17.91 | Jun 5, 2023 |
| Le-Nguyen Quoc | See Remarks | EXERCISE | $100K–$500K | 80K | $3.11 | May 11, 2023 |
| Le-Nguyen Quoc | See Remarks | SELL | $100K–$500K | 14K | $18.11 | May 11, 2023 |
| Martins Ryan | CFO | SELL | $100K–$500K | 9K | $14.95 | Apr 6, 2023 |
| RA CAPITAL MANAGEMENT, L.P. | Director | BUY | $1M+ | 2.5M | $16.25 | Mar 30, 2023 |
| Hayden Michael R | Director | BUY | $1M+ | 88K | $12.28 | Mar 30, 2023 |
| Martins Ryan | CFO | SELL | $50K–$100K | 5K | $16.11 | Mar 27, 2023 |
| PALEKAR ROHAN | CEO | SELL | $100K–$500K | 15K | $16.00 | Mar 27, 2023 |
| Atkinson Edward Morrow III | Director | SELL | $100K–$500K | 10K | $13.60 | Mar 3, 2023 |
| Atkinson Edward Morrow III | Director | EXERCISE | $15K–$50K | 10K | $4.44 | Mar 3, 2023 |
| Martins Ryan | CFO | SELL | $15K–$50K | 3K | $13.89 | Feb 22, 2023 |
| Martins Ryan | CFO | SELL | $15K–$50K | 1K | $14.41 | Feb 10, 2023 |
| Martins Ryan | CFO | SELL | $15K–$50K | 4K | $13.04 | Feb 8, 2023 |
| Martins Ryan | CFO | EXERCISE | $1K–$15K | 3K | $3.11 | Feb 8, 2023 |
| Martins Ryan | CFO | SELL | $50K–$100K | 6K | $12.51 | Jan 5, 2023 |
| RA CAPITAL MANAGEMENT, L.P. | Director | BUY | $1M+ | 1.2M | $7.65 | Oct 20, 2022 |
| RA CAPITAL MANAGEMENT, L.P. | Director | BUY | $1M+ | 2.8M | $3.55 | Jul 6, 2022 |
| Waisbourd Ram | See Remarks | SELL | $15K–$50K | 7K | $5.70 | Feb 3, 2022 |
| Waisbourd Ram | See Remarks | EXERCISE | $1K–$15K | 7K | $1.93 | Feb 3, 2022 |
| PALEKAR ROHAN | CEO | BUY | $50K–$100K | 8K | $7.05 | Jan 31, 2022 |
| ORBIMED ADVISORS LLC | 10% Owner | SELL | $500K+ | 71K | $8.39 | Jan 27, 2022 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 2 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| DekaBank Deutsche Girozentrale | 90K | $1M+ | SH |
| IFP Advisors, Inc | 17 | <$1K | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G/A · Feb 13, 2026
0.0%
0 shares
Pentwater Capital Management LP
SC 13G · Nov 14, 2025
0.0%
0 shares
SC 13G/A · Nov 14, 2025
6.3%
9.4M shares
SUVRETTA CAPITAL MANAGEMENT, LLC
SC 13G/A · Nov 13, 2025
5.6%
8.3M shares
SC 13D/A · Nov 3, 2025
0.0%
0 shares
Adage Capital Management, L.P.
SC 13D/A · Oct 31, 2025
0.0%
0 shares
SC 13G/A · Oct 7, 2025
3.6%
5.4M shares
Adage Capital Management, L.P.
SC 13D · Oct 3, 2025
6.1%
9.1M shares
SC 13G/A · Aug 14, 2025
14.2%
20.8M shares
SC 13G · Jul 29, 2025
5.6%
8.2M shares
SC 13G/A · May 15, 2025
9.2%
13.8M shares
SC 13G/A · May 15, 2025
1.3%
2.0M shares
SC 13G/A · May 14, 2025
14.0%
20.5M shares
SUVRETTA CAPITAL MANAGEMENT, LLC
SC 13G/A · May 2, 2025
9.9%
14.6M shares
SC 13D/A · Mar 4, 2025
13.7%
20.0M shares
SC 13G/A · Feb 14, 2025
1.9%
2.2M shares
SUVRETTA CAPITAL MANAGEMENT, LLC
SC 13G/A · Feb 14, 2025
8.5%
10.2M shares
SC 13G/A · Feb 7, 2025
15.3%
20.3M shares
SC 13D/A · Feb 3, 2025
15.1%
20.0M shares
SC 13G · Dec 23, 2024
5.4%
6.5M shares
SC 13D/A · Nov 19, 2024
11.9%
14.3M shares
Biotechnology Value Fund, L.P.
SC 13G/A · Nov 14, 2024
3.4%
3.6M shares
Janus Henderson Group plc EIN #00-0000000
SC 13G/A · Nov 14, 2024
11.4%
2.5M shares
Janus Henderson Group plc EIN #00-0000000
SC 13G/A · Nov 14, 2024
14.3%
15.2M shares
SC 13G/A · Nov 14, 2024
7.0%
7.4M shares
SC 13G/A · Nov 8, 2024
7.1%
7.5M shares
SC 13G/A · Oct 22, 2024
7.1%
7.5M shares
Suvretta Capital Management, LLC
SC 13G/A · Oct 18, 2024
7.5%
8.0M shares
STATE STREET CORPORATION 04-2456637
SC 13G/A · Oct 17, 2024
3.1%
3.3M shares
SC 13D/A · Aug 7, 2024
13.4%
14.3M shares
SC 13D/A · Mar 6, 2024
14.8%
14.3M shares
Cormorant Global Healthcare Master Fund, LP
SC 13G/A · Feb 14, 2024
0.0%
0 shares
SC 13G/A · Feb 14, 2024
2.1%
2.0M shares
Biotechnology Value Fund, L.P.
SC 13G/A · Feb 14, 2024
4.2%
4.0M shares
SC 13G · Feb 14, 2024
6.0%
5.6M shares
Suvretta Capital Management, LLC
SC 13G/A · Feb 13, 2024
5.2%
4.9M shares
Janus Henderson Group plc EIN #00-0000000
SC 13G/A · Feb 12, 2024
10.8%
10.1M shares
Janus Henderson Group plc EIN #00-0000000
SC 13G/A · Feb 12, 2024
9.6%
8.9M shares
SC 13G · Jan 29, 2024
5.9%
5.5M shares
STATE STREET CORPORATION I.R.S. IDENTIFICATION NO. OF THE ABOVE PERSON 04-2456637
SC 13G · Jan 24, 2024
5.8%
0 shares
SC 13D/A · Dec 13, 2023
13.6%
12.9M shares
Suvretta Capital Management, LLC
SC 13G · Oct 30, 2023
6.4%
4.8M shares
SC 13D/A · Aug 11, 2023
16.7%
12.9M shares
SC 13D/A · Mar 30, 2023
18.0%
12.9M shares
SC 13D/A · Mar 24, 2023
0.0%
0 shares
Janus Henderson Group plc EIN #00-0000000
SC 13G/A · Feb 14, 2023
5.6%
2.7M shares
SC 13G/A · Feb 14, 2023
1.4%
700K shares
Janus Henderson Group plc EIN #00-0000000
SC 13G · Feb 14, 2023
8.3%
3.4M shares
Longitude Capital Partners III, LLC
SC 13D/A · Feb 14, 2023
2.6%
1.2M shares
Biotechnology Value Fund, L.P.
SC 13G/A · Feb 14, 2023
3.6%
1.9M shares