IBIO · iBio, Inc. · Shareholders & Ownership
The latest filing states the doubt was alleviated.
“The history of significant losses, the negative cash flow from operations, and the dependence by the Company on its ability to obtain additional financing to fund its operations in the past raised substantial doubt about the Company's ability to continue as a going concern. In August 2025, the Company closed an underwritten public offering raising gross proceeds of approximately $50 million and in January 2026, the Company raised gross proceeds of approximately $26 million in a private placement. Additionally, the Company received gross proceeds of approximately $33.4 million from the exercise of warrants during the year ended June 30, 2026. Based on the total cash and cash equivalents, and investments in debt securities of approximately $88 million at June 30, 2026, the Company believes that its current cash position is sufficient to fund its operations for at least 12 months from the date of filing this Annual Report on Form 10-K for the year ended June 30, 2026 (the “Annual Report”).”View the 10-K filed Aug 28, 2026
Every disclosed holder of IBIO in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns IBIO
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positionsNo chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.
| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 34,584,154 | 53.78% |
| Insiders (Forms 3, 4, 5) | 304,860 | 0.47% |
| 13D/G-only blocks | 30,000,397 | 46.65% |
| Remaining | 582,155 | -0.91% |
| Registered funds (N-PORT, not summed) | 2,625,384 | 4.08% |
Shares outstanding: 64,307,256, the issuer's latest cover-page count restated onto today's split basis.
Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of IBIO
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
Sirenia Capital Management LP
13G
CIK 2115022 · Registered investment adviser · Mar 31, 2026
Rule 13d-1(b), qualified institution
|
11,586,340 | ||
| 2 |
Coastlands Capital LP
13G
CIK 2068530 · Investment adviser · Oct 7, 2026
Rule 13d-1(b), qualified institution
|
6,247,738 | ||
| 3 |
Affinity Asset Advisors, LLC
13F
CIK 1773195 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,007,881 | ||
| 3.1 |
Affinity Asset Advisors, LLC
13G
CIK 1773195 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
5,068,882 | ||
| 4 |
Cormorant Asset Management, LP
13F
CIK 1583977 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,570,000 | ||
| 4.1 |
Cormorant Asset Management, LP
13G
CIK 1583977 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
5,117,481 | ||
| 5 |
SILVERARC CAPITAL MANAGEMENT, LLC
13F
CIK 1816307 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,520,490 | ||
| 6 |
Lynx1 Capital Management LP
13G
CIK 1910456 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(c), passive investor
|
2,807,016 | ||
| 7 |
Vestal Point Capital, LP
13F
CIK 1974915 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,600,000 | ||
| 7.1 |
Vestal Point Capital, LP
13G
CIK 1974915 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
4,025,000 | ||
| 8 |
Adage Capital Management, L.P.
13G
CIK 1535978 · Investment adviser · Sep 30, 2025
Rule 13d-1(b), qualified institution
|
2,181,422 | ||
| 9 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,098,151 | ||
| 10 |
Frazier Life Sciences Management, L.P.
13F
CIK 1892134 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,953,467 | ||
| 11 |
|
1,953,467 | ||
| 12 |
Ensign Peak Advisors, Inc
13F
CIK 1454984 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,832,457 | ||
| 13 |
Woodline Partners LP
13F
CIK 1784547 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,776,547 | ||
| 14 |
MILLENNIUM MANAGEMENT LLC
13F
CIK 1273087 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,651,473 | ||
| 15 |
EcoR1 Capital, LLC
13G
CIK 1587114 · Registered investment adviser · Mar 31, 2026
Rule 13d-1(b), qualified institution
|
1,583,000 | ||
| 16 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
1,465,833 | ||
| 17 |
CITADEL ADVISORS LLC
13F
CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,384,029 | ||
| 18 |
|
1,235,827 | ||
| 19 |
Balyasny Asset Management L.P.
13F
CIK 1218710 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,170,893 | ||
| 20 |
BANK OF AMERICA CORP /DE/
13F
CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,121,492 | ||
| 21 |
Ikarian Capital, LLC
13F
CIK 1778253 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
957,062 | ||
| 22 |
Sio Capital Management, LLC
13F
CIK 1482416 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
904,268 | ||
| 23 |
MARSHALL WACE, LLP
13F
CIK 1318757 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
904,132 | ||
| 24 |
Patrick J. Crutcher
13G
CIK 1754540 · Investment adviser · Jun 30, 2025
Rule 13d-1(c), passive investor
|
847,044 | ||
| 25 |
|
789,293 | ||
| 26 |
Opaleye Management Inc.
13G
CIK 1595855 · Registered investment adviser · Dec 31, 2024
Rule 13d-1(c), passive investor
|
750,000 | ||
| 27 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
582,071 | ||
| 28 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
500,816 | ||
| 29 |
Walleye Capital LLC
13F
CIK 1758720 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
500,375 | ||
| 30 |
Squarepoint Ops LLC
13F
CIK 1642575 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
498,872 | ||
| 31 |
TWO SIGMA INVESTMENTS, LP
13F
CIK 1179392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
400,667 | ||
| 32 |
Ally Bridge Group (NY) LLC
13F
CIK 1822947 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
390,147 | ||
| 33 |
ADAR1 Capital Management, LLC
13F
CIK 1940272 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
375,531 | ||
| 34 |
Verdad Advisers, LP
13F
CIK 1812822 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
298,927 | ||
| 35 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
286,875 | ||
| 36 |
BOOTHBAY FUND MANAGEMENT, LLC
13F
CIK 1549230 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
254,412 | ||
| 37 |
NOESIS CAPITAL MANGEMENT CORP
13F
CIK 1262677 · Registered investment adviser · Sep 30, 2026
|
249,000 | ||
| 38 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
242,016 | ||
| 38.1 |
iShares Micro-Cap ETF
Fund
S000004439 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
103,831 | ||
| 39 |
RENAISSANCE TECHNOLOGIES LLC
13F
CIK 1037389 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
202,847 | ||
| 40 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
200,455 | ||
| 41 |
|
183,823 | ||
| 42 |
|
170,799 | ||
| 43 |
DAFNA Capital Management LLC
13F
CIK 1389933 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
170,053 | ||
| 44 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
111,319 | ||
| 45 |
Atom Investors LP
13F
CIK 1738902 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
101,557 | ||
| 46 |
XTX Topco Ltd
13F
CIK 1828301 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
57,842 | ||
| 47 |
Headlands Technologies LLC
13F
CIK 1570271 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
47,413 | ||
| 48 |
|
35,974 | ||
| 49 |
|
30,652 | ||
| 50 |
VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND
Fund
S000002855 · Registered fund · Jun 30, 2026
VANGUARD INSTITUTIONAL INDEX FUNDS, not summed
|
29,586 |
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
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