IbioIBIO
13F holders, Q4 2025 (December 31)50holders +18
25new positions
8sold out
1famous investor
$1.93avg. 13F price*
At the end of Q4 2025, 50 institutions reported holding Ibio Inc. (IBIO) in their 13F filings, up 18 from Q3 2025. 25 opened new positions and 8 sold out. The largest holders were EcoR1 Capital, LLC ($4.3M), Affinity Asset Advisors, LLC ($4.0M) and Logos Global Management LP ($3.9M). One famous investor held it Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- Ibio Inc.
- CUSIP
- 451033708
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 25 | $22.2M |
| Exits | 8 | $1.4M |
All 13F filers, Q3 2025 → Q4 2025: 14,498,562 shares bought and 1,729,142 shares sold, net +12,769,420 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 50 holders
| EcoR1 Capital, LLC | 0.20% | New | 2,228,000 | $4.3M |
| Affinity Asset Advisors, LLC | 0.29% | New | 2,057,200 | $4.0M |
| Logos Global Management LP | 0.26% | New | 2,000,000 | $3.9M |
| Frazier Life Sciences Management, L.P. | 0.10% | New | 1,953,467 | $3.8M |
| Balyasny Asset Management L.P. | 0.00% | Add +10440.2% | 1,096,179 | $2.1M |
| Ikarian Capital, LLC | 0.24% | Add +55.0% | 957,062 | $1.8M |
| Vanguard Group Inc. | 0.00% | Add +222.2% | 883,149 | $1.7M |
| Sio Capital Management, LLC | 0.24% | New | 740,000 | $1.4M |
| Ameriprise Financial Inc. | 0.00% | Add +21.2% | 584,368 | $1.1M |
| Two Sigma Investments, LP | 0.00% | New | 456,333 | $881K |
| ADAR1 Capital Management, LLC | 0.06% | Add +1402.0% | 405,531 | $783K |
| Renaissance Technologies | 0.00% | New | 353,339 | $682K |
| Monashee Investment Management LLC | 0.31% | New | 274,862 | $530K |
| Boothbay Fund Management, LLC | 0.01% | Add +43.9% | 254,412 | $491K |
| Hudson Bay Capital Management LP | 0.00% | New | 242,076 | $467K |
| Noesis Capital Mangement Corp. | 0.06% | New | 224,200 | $433K |
| Geode Capital Management, LLC | 0.00% | Add +47.1% | 222,610 | $430K |
| Walleye Capital LLC | 0.00% | New | 198,375 | $383K |
| Jefferies Financial Group Inc. | 0.00% | New | 160,000 | $309K |
| UBS Group AG | 0.00% | Add +12655500.0% | 126,556 | $244K |
| Marshall Wace, LLP | 0.00% | New | 121,286 | $234K |
| Bank of America Corp. | 0.00% | Add +79757.2% | 115,793 | $223K |
| Two Sigma Advisers, LP | 0.00% | New | 108,400 | $209K |
| Silverarc Capital Management, LLC | 0.03% | New | 106,000 | $205K |
| Jane Street Group, LLC | 0.00% | New | 105,700 | $204K |
| Mountain Capital Investment Advisors Inc. | 0.02% | New | 63,000 | $142K |
| State Street Corp. | 0.00% | Add +116.3% | 72,899 | $141K |
| BlackRock, Inc. | 0.00% | No change | 42,727 | $82K |
| Northern Trust Corp. | 0.00% | Add +74.9% | 40,314 | $78K |
| Persistent Asset Partners Ltd | 0.04% | New | 39,585 | $76K |
| XTX Topco Ltd | 0.00% | New | 37,014 | $71K |
| Morgan Stanley | 0.00% | Add +48312.3% | 27,595 | $53K |
| PFG Investments, LLC | 0.00% | New | 21,500 | $41K |
| Vanguard Personalized Indexing Management, LLC | 0.00% | New | 12,491 | $24K |
| Citigroup Inc. | 0.00% | New | 5,046 | $10K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -20.4% | 1,380 | $3K |
| Fortitude Family Office, LLC | 0.00% | New | 431 | $832 |
| Osaic Holdings, Inc. | 0.00% | Reduce -45.5% | 384 | $741 |
| SHP Wealth Management | 0.00% | — | 60 | $116 |
| Arax Advisory Partners | 0.00% | No change | 91 | $112 |
| SBI Securities Co., Ltd. | 0.00% | No change | 22 | $42 |
| SOA Wealth Advisors, LLC. | 0.00% | No change | 13 | $25 |
| BNP Paribas Financial Markets | 0.00% | No change | 5 | $10 |
| Activest Wealth Management | 0.00% | No change | 4 | $8 |
| JPMorgan Chase & Co. | 0.00% | No change | 2 | $4 |
| Barclays PLC | 0.00% | New | 2 | $4 |
| Financial Gravity Asset Management, Inc. | 0.00% | No change | 2 | $4 |
| Wells Fargo & Company | 0.00% | Reduce -75.0% | 1 | $2 |
| Steward Partners Investment Advisory, LLC | 0.00% | No change | 1 | $2 |
| Motiv8 Investments LLC | 0.00% | New | 1 | $0 |
"% of holder's portfolio" is IBIO's weight in each manager's 13F, not the share of Ibio Inc. the manager owns.