Latest Period
Q2 2026
Security Snapshot
iBio, Inc. - Common Stock, $0.001 par value per share (IBIO) Institutional Ownership
CUSIP: 451033708
13F Institutional Holders and Ownership History from Q1 2023 to Q2 2026
Institutions Reporting
55
Shares (Excl. Options)
34,740,154
Price
$1.75
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- Security type / class
- Equity / Common Stock, $0.001 par value per share
- Symbol
- IBIO on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 34,740,154
- Total 13F value
- $60,795,376
- Portfolio coverage rank
- 0%
- Share change
- +15,313,116
- Value change
- +$26,282,765
- Number of holders
- 55
- Shares outstanding
- 51,981,778
- SEC-reported price per share
- $1.38
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- IBIO - iBio, Inc. - Common Stock, $0.001 par value per share is tracked under CUSIP 451033708.
- 55 institutions reported positions in Q2 2026.
- 15 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 52 to 55 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $36,911,652 to $60,795,376.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 55 institutions filings for Q2 2026.
Security key
451033708
Latest holder period
Q2 2026
13F holders
55
13D/G owners
15
CIK / CUSIP context first
Open Q2 2026 holders
IBIO full holder history
iBio, Inc. SEC filings
iBio, Inc. company facts
iBio, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 451033708:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
15
Security
IBIO
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Sirenia Capital Management LP | 9.9% | $25,489,948 | 11,586,340 | Sirenia Capital Management LP | 31 Mar 2026 | |||
| Cormorant Asset Management, LP | 10% | 0% | $7,420,347 | +$4,160,733 | 5,117,481 | +128% | Cormorant Asset Management, LP | 30 Jun 2026 |
| Affinity Asset Advisors, LLC | 10% | 0% | $7,349,879 | +$2,290,759 | 5,068,882 | +45% | Affinity Asset Advisors, LLC | 30 Jun 2026 |
| Vestal Point Capital, LP | 7.9% | -20% | $5,836,250 | -$362,500 | 4,025,000 | -5.8% | Vestal Point Capital, LP | 30 Jun 2026 |
| Lynx1 Capital Management LP | 5.4% | $4,070,173 | +$4,070,173 | 2,807,016 | Lynx1 Capital Management LP | 30 Jun 2026 | ||
| EcoR1 Capital, LLC | 9.9% | $2,673,600 | 2,228,000 | EcoR1 Capital, LLC | 10 Dec 2025 | |||
| SILVERARC CAPITAL MANAGEMENT, LLC | 10% | $1,795,528 | 2,181,422 | SilverArc Capital Management, LLC | 30 Sep 2025 | |||
| Adage Capital Management, L.P. | 10% | $1,795,528 | 2,181,422 | Adage Capital Management, L.P. | 30 Sep 2025 | |||
| Frazier Life Sciences Public Fund, L.P. | 8.7% | $2,344,160 | 1,953,467 | Frazier Life Sciences Public Fund, L.P. | 09 Dec 2025 | |||
| Logos Global Management LP | 4.6% | -48% | $3,810,000 | -$1,270,000 | 1,500,000 | -25% | Logos Global Management LP | 31 Dec 2025 |
| ADAR1 Capital Management, LLC | 4.4% | -55% | $3,433,244 | -$1,123,655 | 1,351,671 | -25% | ADAR1 Capital Management, LLC | 31 Dec 2025 |
| INTEGRATED CORE STRATEGIES (US) LLC | 5.2% | $2,381,068 | 1,235,827 | Millennium Management LLC | 15 Jan 2026 | |||
| Ikarian Capital, LLC | 5% | $947,430 | 1,151,051 | Ikarian Capital, LLC | 30 Sep 2025 | |||
| Crutcher Patrick J | 3.1% | -56% | $635,283 | +$112,748 | 847,044 | +22% | Patrick J. Crutcher | 30 Jun 2025 |
| Opaleye Management Inc. | 7.6% | $787,500 | 750,000 | Opaleye Management, Inc. | 31 Dec 2024 |
As of 30 Jun 2026, 55 institutional investors reported holding 34,740,154 shares of iBio, Inc. - Common Stock, $0.001 par value per share (IBIO). This represents 67% of the company’s total 51,981,778 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
64%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Affinity Asset Advisors, LLC | 7.7% | 4,007,881 | +29% | 0.34% | $7,013,792 |
| Cormorant Asset Management, LP | 6.9% | 3,570,000 | 0.32% | $6,247,500 | |
| SILVERARC CAPITAL MANAGEMENT, LLC | 6.8% | 3,520,490 | +1458% | 0.69% | $6,160,858 |
| Vestal Point Capital, LP | 5% | 2,600,000 | 0.11% | $4,550,000 | |
| VANGUARD CAPITAL MANAGEMENT LLC | 4% | 2,098,151 | +93% | 0% | $3,671,764 |
| Frazier Life Sciences Management, L.P. | 3.8% | 1,953,467 | 0% | 0.07% | $3,418,567 |
| Ensign Peak Advisors, Inc | 3.5% | 1,832,457 | 0.01% | $3,206,800 | |
| Woodline Partners LP | 3.4% | 1,776,547 | 0.01% | $3,108,957 | |
| MILLENNIUM MANAGEMENT LLC | 3.2% | 1,651,473 | +6.6% | 0% | $2,890,078 |
| CITADEL ADVISORS LLC | 2.7% | 1,384,029 | +45% | 0% | $2,422,051 |
| Balyasny Asset Management L.P. | 2.3% | 1,170,893 | +16% | 0% | $2,049,063 |
| BANK OF AMERICA CORP /DE/ | 2.2% | 1,121,492 | +286% | 0% | $1,962,611 |
| Ikarian Capital, LLC | 1.8% | 957,062 | 0% | 0.28% | $1,674,859 |
| Sio Capital Management, LLC | 1.7% | 904,268 | 0% | 0.27% | $1,582,469 |
| MARSHALL WACE, LLP | 1.7% | 904,132 | +46% | 0% | $1,582,233 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.96% | 500,816 | +29% | 0% | $876,650 |
| Walleye Capital LLC | 0.96% | 500,375 | +29% | 0% | $875,656 |
| Squarepoint Ops LLC | 0.96% | 498,872 | 0% | $873,026 | |
| NOESIS CAPITAL MANGEMENT CORP | 0.78% | 405,000 | +30% | 0.09% | $708,750 |
| TWO SIGMA INVESTMENTS, LP | 0.77% | 400,667 | -2% | 0% | $701,167 |
| Ally Bridge Group (NY) LLC | 0.75% | 390,147 | 0.88% | $682,757 | |
| ADAR1 Capital Management, LLC | 0.72% | 375,531 | -20% | 0.03% | $657,179 |
| Verdad Advisers, LP | 0.58% | 298,927 | +431% | 0.5% | $523,122 |
| VANGUARD FIDUCIARY TRUST CO | 0.55% | 286,875 | +40% | 0% | $502,031 |
| BOOTHBAY FUND MANAGEMENT, LLC | 0.49% | 254,412 | 0% | 0.01% | $445,221 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
14
Latest
Q2 2026
Rows shown
1-14 of 14
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 34,740,154 | $60,795,376 | +$26,282,765 | $1.75 | 55 |
| 2026 Q1 | 19,427,041 | $36,911,652 | +$4,998,745 | $1.90 | 52 |
| 2025 Q4 | 16,339,467 | $31,555,271 | +$26,570,216 | $1.93 | 49 |
| 2025 Q3 | 3,569,988 | $2,955,323 | +$299,071 | $0.83 | 32 |
| 2025 Q2 | 3,204,109 | $2,444,153 | -$225,284 | $0.76 | 30 |
| 2025 Q1 | 2,587,118 | $10,399,905 | +$550,651 | $4.02 | 33 |
| 2024 Q4 | 2,612,402 | $6,400,381 | +$11,561 | $2.45 | 29 |
| 2024 Q3 | 2,607,512 | $5,788,674 | +$356,141 | $2.22 | 31 |
| 2024 Q2 | 2,451,117 | $5,171,853 | -$1,674,085 | $2.11 | 26 |
| 2024 Q1 | 2,885,311 | $11,469,753 | +$10,566,308 | $4.06 | 26 |
| 2023 Q4 | 251,385 | $344,588 | +$344,585 | $1.37 | 20 |
| 2023 Q3 | 0 | $0 | -$5 | $1.38 | 0 |
| 2023 Q2 | 8 | $5 | $0.62 | 1 | |
| 2023 Q1 | 8 | $17 | +$17 | $2.12 | 1 |