Who owns iBio, Inc.?
Institutional ownership of IBIO from SEC Form 13F filings across 37 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.
37
13F holders
$30.7M
value, 2026 filers
111.3%
of shares outstanding (17.6M sh)
9
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 | SILVERARC CAPITAL MANAGEMENT, LLC | 3.5M | $6.2M | 0.6% | 22.3% | +1457.7% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 2.1M | $3.7M | 0.0% | 13.3% | -3.6% |
| 3 | Woodline Partners LPNEW | 1.8M | $3.1M | 0.0% | 11.3% | new |
| 4 | MILLENNIUM MANAGEMENT LLC | 1.7M | $2.9M | 0.0% | 10.5% | +6.6% |
| 5 | CITADEL ADVISORS LLC | 1.4M | $2.4M | 0.0% | 8.8% | +44.7% |
| 6 | Balyasny Asset Management L.P. | 1.2M | $2.0M | 0.0% | 7.4% | +15.8% |
| 7 | BANK OF AMERICA CORP /DE/ | 1.1M | $2.0M | 0.0% | 7.1% | +286.2% |
| 8 | Sio Capital Management, LLC | 904,268 | $1.6M | 0.3% | 5.7% | 0.0% |
| 9 | MARSHALL WACE, LLP | 904,132 | $1.6M | 0.0% | 5.7% | +45.7% |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | 500,816 | $876,650 | 0.0% | 3.2% | +29.2% |
| 11 | Walleye Capital LLC | 500,375 | $875,656 | 0.0% | 3.2% | -35.6% |
| 12 | Squarepoint Ops LLCNEW | 498,872 | $873,026 | 0.0% | 3.2% | new |
| 13 | TWO SIGMA INVESTMENTS, LP | 400,667 | $701,167 | 0.0% | 2.5% | -2.0% |
| 14 | VANGUARD FIDUCIARY TRUST CO | 286,875 | $502,031 | 0.0% | 1.8% | +39.9% |
| 15 | BOOTHBAY FUND MANAGEMENT, LLC | 254,412 | $445,221 | 0.0% | 1.6% | 0.0% |
| 16 | BlackRock, Inc. | 242,016 | $423,528 | 0.0% | 1.5% | +84.4% |
| 17 | GOLDMAN SACHS GROUP INC | 200,455 | $350,796 | 0.0% | 1.3% | +0.1% |
| 18 | NORTHERN TRUST CORP | 111,319 | $194,808 | 0.0% | 0.7% | +44.0% |
| 19 | TWO SIGMA SECURITIES, LLCNEW | 16,151 | $28,264 | 0.0% | 0.1% | new |
| 20 | Bank of New York Mellon CorpNEW | 10,637 | $18,614 | 0.0% | 0.1% | new |
| 21 | JPMORGAN CHASE & CO | 5,897 | $10,201 | 0.0% | 0% | +294750.0% |
| 22 | Vanguard Global Advisers, LLC | 5,460 | $9,555 | 0.0% | 0% | 0.0% |
| 23 | BARCLAYS PLCNEW | 3,255 | $5,696 | 0.0% | 0% | new |
| 24 | UBS Group AG | 501 | $877 | 0.0% | 0% | -76.9% |
| 25 | FMR LLCNEW | 433 | $757 | 0.0% | 0% | new |
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.