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 Q3 2026

13F reference period

Q2 2026

Institutions Reporting

55

Shares (Excl. Options)

34.74MFull value: 34,740,154 · shares · 30 Jun 2026

Price

$1.75

The headline uses the Q2 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended. Newer periods in the history table contain incoming reports and may be incomplete.

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Security type / class
Equity / Common Stock, par value $0.001 per share
Symbol
IBIO on Nasdaq
All holders as of 30 Jun 2026
Q2 2026
Total 13F shares
34,740,154
Latest holder snapshot 5 signals
Total 13F value
$60,795,376
Portfolio coverage rank
0%
Share change
+15,313,116
Value change
+$26,282,765
Number of holders
55
Issuer context Names, identifiers, and filing context for this profile. 2 identity fields
Shares outstanding
64,277,140
SEC-reported price per share
$1.19
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Filing notes and source

Key facts

  • IBIO - iBio, Inc. - Common Stock, par value $0.001 per share is tracked under CUSIP 451033708.
  • 55 institutions reported positions in Q2 2026.
  • 16 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
    $36.91MFull value: $36,911,652 · USD · 31 Mar 2026
    to
    $60.8MFull value: $60,795,376 · USD · 30 Jun 2026
    .

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

Latest holder context comes from 55 institutions filings for Q2 2026.

Open SEC evidence

Security key

451033708

13F reference period

Q2 2026

13F holders

55

13D/G owners

16

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

Latest 13F filings Latest 13D/G filings All securities

13D/G owners

Significant owners

Large-stake holder rows connected to Schedule 13D/G evidence.

Rows
16
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
Coastlands Capital LP 9.7% $8,746,833 6,247,738 Coastlands Capital LP 07 Oct 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
34.74MFull value: 34,740,154 · shares · 30 Jun 2026
shares of iBio, Inc. - Common Stock, par value $0.001 per share (IBIO). This represents 54% of the company’s total
64.28MFull value: 64,277,140 · shares · Stored outstanding share count
outstanding shares.

13F concentration

Top 25 institutional shareholders

Largest 13F positions for this security by reported shares and value.

Top holder share
52%
Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
Affinity Asset Advisors, LLC 6.2% 4,007,881 +29% 0.34% $7,013,792
Cormorant Asset Management, LP 5.6% 3,570,000 0.32% $6,247,500
SILVERARC CAPITAL MANAGEMENT, LLC 5.5% 3,520,490 +1458% 0.69% $6,160,858
Vestal Point Capital, LP 4% 2,600,000 0.11% $4,550,000
VANGUARD CAPITAL MANAGEMENT LLC 3.3% 2,098,151 +93% 0% $3,671,764
Frazier Life Sciences Management, L.P. 3% 1,953,467 0% 0.07% $3,418,567
Ensign Peak Advisors, Inc 2.9% 1,832,457 0.01% $3,206,800
Woodline Partners LP 2.8% 1,776,547 0.01% $3,108,957
MILLENNIUM MANAGEMENT LLC 2.6% 1,651,473 +6.6% 0% $2,890,078
CITADEL ADVISORS LLC 2.2% 1,384,029 +45% 0% $2,422,051
Balyasny Asset Management L.P. 1.8% 1,170,893 +16% 0% $2,049,063
BANK OF AMERICA CORP /DE/ 1.7% 1,121,492 +286% 0% $1,962,611
Ikarian Capital, LLC 1.5% 957,062 0% 0.28% $1,674,859
Sio Capital Management, LLC 1.4% 904,268 0% 0.27% $1,582,469
MARSHALL WACE, LLP 1.4% 904,132 +46% 0% $1,582,233
GEODE CAPITAL MANAGEMENT, LLC 0.78% 500,816 +29% 0% $876,650
Walleye Capital LLC 0.78% 500,375 +29% 0% $875,656
Squarepoint Ops LLC 0.78% 498,872 0% $873,026
NOESIS CAPITAL MANGEMENT CORP 0.63% 405,000 +30% 0.09% $708,750
TWO SIGMA INVESTMENTS, LP 0.62% 400,667 -2% 0% $701,167
Ally Bridge Group (NY) LLC 0.61% 390,147 0.88% $682,757
ADAR1 Capital Management, LLC 0.58% 375,531 -20% 0.03% $657,179
Verdad Advisers, LP 0.47% 298,927 +431% 0.5% $523,122
VANGUARD FIDUCIARY TRUST CO 0.45% 286,875 +40% 0% $502,031
BOOTHBAY FUND MANAGEMENT, LLC 0.4% 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
15
Headline period
Q2 2026
Rows shown
1-15 of 15
Period 13F Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q3 477 $564 $1.19 3
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 $1.19 0
2023 Q2 8 $5 $0.62 1
2023 Q1 8 $17 +$17 $2.12 1
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