Security key
451033708
iBio, Inc. - Common Stock, $0.001 par value per share (IBIO)
CUSIP: 451033708
Q1 2026 13F Holders as of 31 Mar 2026
- Security type / class
- Equity / Common Stock, $0.001 par value per share
- Total 13F shares
- 19,427,041
- Total 13F value
- $36,911,652
- Share change
- +2,671,949
- SEC-reported price per share
- $1.90
- Number of holders
- 52
- Value change
- +$4,998,745
- Number of buys
- 29
- Number of sells
- 20
- Shares outstanding
- 51,981,778
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2026
Institutions
52
Top holders
10
IBIO full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2026
Previous quarter: Q4 2025
iBio, Inc. SEC filings
iBio, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 451033708
Recent filing periods:
Ownership snapshot
Top reported holders of IBIO - iBio, Inc. - Common Stock, $0.001 par value per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Adage Capital Management,...
Disclosed value leader
Sirenia Capital Managemen...
Comparable rows
15/15
Latest evidence
31 Mar 2026
13D/G
13F
Lead comparable stake: 10%
13D/G row: Adage Capital Management, L.P.
Showing 1-6 of 15 holder rows.
Quick read
Adage Capital Management, L.P. leads the comparable SEC ownership view at 10%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Adage Capital Management, L.P.'s linked filing trail.
Comparable ownership
Top 5
Adage Capital Management, L.P.
10%
SILVERARC CAPITAL MANAGEMENT, LLC
10%
Cormorant Asset Management, LP
10%
Sirenia Capital Management LP
9.9%
Opaleye Management Inc.
7.6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Adage Capital Management, L.P. |
13D/G
|
10%
|
$1,795,528
2,181,422 shares
|
$0 | 30 Sep 2025 |
| SILVERARC CAPITAL MANAGEMENT, LLC |
13D/G
13F
Company
|
10%
|
$1,795,528
2,181,422 shares
|
$0 | 30 Sep 2025 |
| Cormorant Asset Management, LP |
13D/G
|
10%
|
—
3,834,335 shares
|
$0 | 31 Mar 2026 |
| Sirenia Capital Management LP |
13D/G
|
9.9%
|
$25,489,948
11,586,340 shares
|
$0 | 31 Mar 2026 |
| Opaleye Management Inc. |
13D/G
|
7.6%
|
$787,500
750,000 shares
|
$0 | 31 Dec 2024 |
| Frazier Life Sciences Public Fund, L.P. |
13D/G
|
5.7%
|
—
1,953,467 shares
|
$0 | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
52
Shares
19,427,041
Rows available
52
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2026 vs Q4 2025 Across Filers
Q4 2025 holders
49
Q1 2026 holders
52
Holder diff
3
| Investor | Q4 2025 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q4 2025 value | Q1 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend