IBIO Institutional Ownership
Who owns iBio, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 55 funds reported holding IBIO at Jun 30, 2026, together owning 54.0% of the company.
- ▲37 buying vs 21 selling
- ▲Held by funds +23.8 pts
- ▲Funds holding +3
- ▲Superinvestors: 3 added, 0 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 55 | 52 | +5.8% |
| In funds' top 10 | 0 | 0 | – |
| 13F shares | 34.7M | 19.4M | +78.8% |
| Held by funds | 54.0% | 30.2% | +23.8 pts |
| New positions | 15 | 13 | +15.4% |
| Increased | 22 | 16 | +37.5% |
| Reduced | 9 | 8 | +12.5% |
| Sold out | 12 | 12 | 0.0% |
| Calls (shares) | 0 | 0 | – |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | – | – | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in IBIO
All superinvestors →
Who owns IBIO
share of fund held shares- Index and passive funds9.8%
- Active managers and hedge funds86.3%
- Banks and brokers3.9%
- Pensions, insurers and other0.0%
The top 10 holders own 70.2% of all IBIO shares that funds reported. Groups are our own grouping of filers by name.
Filed so far for Q3 2026
2 funds changed their position- Noesis Capital Mangement CorpTrimmed−156K sh
- Caitong International Asset Management Co., LtdAdded+51 sh
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | Affinity Asset Advisors, LLC | 6.23% | 4M | $7M | +901K |
| 2 | Cormorant Asset Management, LP | 5.55% | 3.6M | $6.2M | +3.6M |
| 3 | Silverarc Capital Management, LLC | 5.47% | 3.5M | $6.2M | +3.3M |
| 4 | Vestal Point Capital, LP | 4.04% | 2.6M | $4.5M | +2.6M |
| 5 | Vanguard Capital Management LLC | 3.26% | 2.1M | $3.7M | +1M |
| 6 | Frazier Life Sciences Management, L.P. | 3.04% | 2M | $3.4M | 0 |
| 7 | Ensign Peak Advisors, Inc | 2.85% | 1.8M | $3.2M | +1.8M |
| 8 | Woodline Partners LP | 2.76% | 1.8M | $3.1M | +1.8M |
| 9 | Millennium Management LLC | 2.57% | 1.7M | $2.9M | +102K |
| 10 | Citadel Advisors LLC | 2.15% | 1.4M | $2.4M | +428K |
- Cormorant Asset Management, LP+3.6M sh+$6.2M
- Silverarc Capital Management, LLC+3.3M sh+$5.8M
- Vestal Point Capital, LP+2.6M sh+$4.5M
- Ensign Peak Advisors, Inc+1.8M sh+$3.2M
- Woodline Partners LP+1.8M sh+$3.1M
- Vanguard Capital Management LLC+1M sh+$1.8M
- Affinity Asset Advisors, LLC+901K sh+$1.6M
- Bank of America Corp /de/+831K sh+$1.5M
- EcoR1 Capital, LLC−1.6M sh−$3M
- Logos Global Management LP−1.3M sh−$2.5M
- Susquehanna International Group, LLP−413K sh−$784K
- ADAR1 Capital Management, LLC−94K sh−$165K
- Lynx1 Capital Management LP−68K sh−$129K
- Morgan Stanley−31K sh−$56K
- DAFNA Capital Management LLC−24K sh−$41K
- PFG Investments, LLC−20K sh−$38K
IBIO institutional ownership FAQ
Who owns the most IBIO stock?
In Q2 2026 13F filings the largest holder of IBIO was Affinity Asset Advisors, LLC, followed by Cormorant Asset Management, LP and Silverarc Capital Management, LLC. Index fund managers are usually the biggest holders of large companies.
What percentage of IBIO is owned by institutions?
Funds that file 13F reports held 54.0% of IBIO's shares at Jun 30, 2026, compared with 30.2% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying IBIO?
In Q2 2026, 37 funds bought IBIO (15 of them new positions) and 21 sold (12 sold out completely). Among well known investors, 3 added and 0 cut. Our fund sentiment for IBIO is strongly bullish.
What is IBIO's institutional put/call ratio?
Too few option positions were reported for a meaningful ratio.
How current is this IBIO ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.