Latest Period
Q1 2026
Security Snapshot
iBio, Inc. - Common Stock, par value $0.001 per share (IBIO) Institutional Ownership
CUSIP: 451033708
13F Institutional Holders and Ownership History from Q1 2023 to Q1 2026
Institutions Reporting
52
Shares (Excl. Options)
19,427,041
Price
$1.90
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- Security type / class
- Equity / Common Stock, par value $0.001 per share
- Symbol
- IBIO on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 19,427,041
- Total 13F value
- $36,911,652
- Portfolio coverage rank
- 0%
- Share change
- +2,671,949
- Value change
- +$4,998,745
- Number of holders
- 52
- Shares outstanding
- 117,033,737
- SEC-reported price per share
- $1.61
Latest holder snapshot
5 signals
Issuer context
Who this page is about.
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- IBIO - iBio, Inc. - Common Stock, par value $0.001 per share is tracked under CUSIP 451033708.
- 52 institutions reported positions in Q1 2026.
- 14 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 49 to 52 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $31,555,271 to $36,911,652.
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 52 institutions filings for Q1 2026.
Security key
451033708
Latest holder period
Q1 2026
13F holders
52
13D/G owners
14
CIK / CUSIP context first
Open Q1 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
14
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 | |||
| Vestal Point Capital, LP | 9.9% | $3,518,752 | 4,275,000 | Vestal Point Capital, LP | 30 Sep 2025 | |||
| Affinity Asset Advisors, LLC | 10% | 0% | $7,675,906 | +$2,392,350 | 3,489,048 | +45% | Affinity Asset Advisors, LLC | 31 Mar 2026 |
| Cormorant Asset Management, LP | 10% | $1,850,337 | 2,248,010 | Cormorant Asset Management, LP | 30 Sep 2025 | |||
| 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 31 Mar 2026, 52 institutional investors reported holding 19,427,041 shares of iBio, Inc. - Common Stock, par value $0.001 per share (IBIO). This represents 17% of the company’s total 117,033,737 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
16%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Affinity Asset Advisors, LLC | 2.7% | 3,107,200 | +51% | 0.35% | $5,903,680 |
| Frazier Life Sciences Management, L.P. | 1.7% | 1,953,467 | 0% | 0.1% | $3,711,587 |
| EcoR1 Capital, LLC | 1.4% | 1,583,000 | -29% | 0.13% | $3,007,700 |
| MILLENNIUM MANAGEMENT LLC | 1.3% | 1,549,850 | 0% | $2,944,715 | |
| Logos Global Management LP | 1.1% | 1,300,000 | -35% | 0.13% | $2,470,000 |
| VANGUARD CAPITAL MANAGEMENT LLC | 0.93% | 1,088,299 | 0% | 0% | $2,067,768 |
| Balyasny Asset Management L.P. | 0.86% | 1,010,955 | -7.8% | 0% | $1,920,815 |
| Ikarian Capital, LLC | 0.82% | 957,062 | 0% | 0.26% | $1,818,418 |
| CITADEL ADVISORS LLC | 0.82% | 956,429 | 0% | $1,817,215 | |
| Sio Capital Management, LLC | 0.77% | 904,268 | +22% | 0.25% | $1,718,109 |
| MARSHALL WACE, LLP | 0.53% | 620,602 | +412% | 0% | $1,179,144 |
| ADAR1 Capital Management, LLC | 0.4% | 469,878 | +16% | 0.05% | $892,768 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 0.35% | 412,725 | 0% | $784,178 | |
| TWO SIGMA INVESTMENTS, LP | 0.35% | 408,858 | -10% | 0% | $776,830 |
| Walleye Capital LLC | 0.33% | 388,554 | +96% | 0% | $738,253 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.33% | 387,567 | +74% | 0% | $736,602 |
| NOESIS CAPITAL MANGEMENT CORP | 0.27% | 311,500 | +39% | 0.09% | $591,850 |
| BANK OF AMERICA CORP /DE/ | 0.25% | 290,413 | +151% | 0% | $551,785 |
| BOOTHBAY FUND MANAGEMENT, LLC | 0.22% | 254,412 | 0% | 0.01% | $483,383 |
| SILVERARC CAPITAL MANAGEMENT, LLC | 0.19% | 226,000 | +113% | 0.05% | $429,400 |
| VANGUARD FIDUCIARY TRUST CO | 0.18% | 205,015 | 0% | 0% | $389,529 |
| GOLDMAN SACHS GROUP INC | 0.17% | 200,212 | 0% | $380,403 | |
| DAFNA Capital Management LLC | 0.17% | 193,638 | 0.08% | $367,912 | |
| STATE STREET CORP | 0.12% | 141,199 | +94% | 0% | $268,278 |
| BlackRock, Inc. | 0.11% | 131,215 | +207% | 0% | $249,309 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
13
Latest
Q1 2026
Rows shown
1-13 of 13
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 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 | $1.61 | 0 |
| 2023 Q2 | 8 | $5 | $0.62 | 1 | |
| 2023 Q1 | 8 | $17 | +$17 | $2.12 | 1 |