Who owns iBio, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of IBIO from SEC Form 13F filings across 55 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 55 institutions disclosed 34.7M shares of iBio, Inc. worth $60.8M — about 33.4% of shares outstanding; the largest disclosed holder is Affinity Asset Advisors, LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
55
13F holders
$60.8M
value, 2026 filers
33.4%
of shares outstanding (34.7M sh)
16
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of IBIO's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | Affinity Asset Advisors, LLC | 4.0M | $7.0M | 0.3% | 3.9% | +29.0% |
| 2 | Cormorant Asset Management, LPNEW | 3.6M | $6.2M | 0.3% | 3.4% | new |
| 3 | SILVERARC CAPITAL MANAGEMENT, LLC | 3.5M | $6.2M | 0.6% | 3.4% | +1457.7% |
| 4 | Vestal Point Capital, LPNEW | 2.6M | $4.5M | 0.1% | 2.5% | new |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 2.1M | $3.7M | 0.0% | 2% | +92.8% |
| 6 | Frazier Life Sciences Management, L.P. | 2.0M | $3.4M | 0.1% | 1.9% | 0.0% |
| 7 | Ensign Peak Advisors, IncNEW | 1.8M | $3.2M | 0.0% | 1.8% | new |
| 8 | Woodline Partners LPNEW | 1.8M | $3.1M | 0.0% | 1.7% | new |
| 9 | MILLENNIUM MANAGEMENT LLC | 1.7M | $2.9M | 0.0% | 1.6% | +6.6% |
| 10 | CITADEL ADVISORS LLC | 1.4M | $2.4M | 0.0% | 1.3% | +44.7% |
| 11 | Balyasny Asset Management L.P. | 1.2M | $2.0M | 0.0% | 1.1% | +15.8% |
| 12 | BANK OF AMERICA CORP /DE/ | 1.1M | $2.0M | 0.0% | 1.1% | +286.2% |
| 13 | Ikarian Capital, LLC | 957,062 | $1.7M | 0.2% | 0.9% | 0.0% |
| 14 | Sio Capital Management, LLC | 904,268 | $1.6M | 0.3% | 0.9% | 0.0% |
| 15 | MARSHALL WACE, LLP | 904,132 | $1.6M | 0.0% | 0.9% | +45.7% |
| 16 | GEODE CAPITAL MANAGEMENT, LLC | 500,816 | $876,650 | 0.0% | 0.5% | +29.2% |
| 17 | Walleye Capital LLC | 500,375 | $875,656 | 0.0% | 0.5% | +28.8% |
| 18 | Squarepoint Ops LLCNEW | 498,872 | $873,026 | 0.0% | 0.5% | new |
| 19 | NOESIS CAPITAL MANGEMENT CORP | 405,000 | $708,750 | 0.1% | 0.4% | +30.0% |
| 20 | TWO SIGMA INVESTMENTS, LP | 400,667 | $701,167 | 0.0% | 0.4% | -2.0% |
| 21 | Ally Bridge Group (NY) LLCNEW | 390,147 | $682,757 | 0.6% | 0.4% | new |
| 22 | ADAR1 Capital Management, LLC | 375,531 | $657,179 | 0.0% | 0.4% | -20.1% |
| 23 | Verdad Advisers, LP | 298,927 | $523,122 | 0.5% | 0.3% | +430.8% |
| 24 | VANGUARD FIDUCIARY TRUST CO | 286,875 | $502,031 | 0.0% | 0.3% | +39.9% |
| 25 | BOOTHBAY FUND MANAGEMENT, LLC | 254,412 | $445,221 | 0.0% | 0.2% | 0.0% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.