Company · Ownership research

iBio, Inc. IBIO

CIK 0001420720 · CUSIP 451033708

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 451033708 (IBIO), not CUSIP 451033609 (IBIO), CUSIP 451033104 (IBIO), CUSIP 451033203 (IBIO), CUSIP 45107K102 (IBIO), and does not merge CUSIPs.

This page lists the top 20 of 52 rows by value; the complete set is available through the API.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	Affinity Asset Advisors, LLC CIK 1773195 · View history	$5.90M 3,107,200 shares	0.35%	+1.05M(+51.00%)Added	SEC filing ↗ May 14, 2026	▾
02	Frazier Life Sciences Management, L.P. CIK 1892134 · View history	$3.71M 1,953,467 shares	0.10%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
03	EcoR1 Capital, LLC CIK 1587114 · View history	$3.01M 1,583,000 shares	0.13%	-645.00K(-28.90%)Reduced	SEC filing ↗ May 15, 2026	▾
04	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$2.94M 1,549,850 shares	0.00%	+1.55MNew	SEC filing ↗ May 15, 2026	▾
05	Logos Global Management LP CIK 1792126 · View history	$2.47M 1,300,000 shares	0.13%	-700.00K(-35.00%)Reduced	SEC filing ↗ May 15, 2026	▾
06	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$2.07M 1,088,299 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
07	Balyasny Asset Management L.P. CIK 1218710 · View history	$1.92M 1,010,955 shares	0.00%	-85.22K(-7.80%)Reduced	SEC filing ↗ May 15, 2026	▾
08	Ikarian Capital, LLC CIK 1778253 · View history	$1.82M 957,062 shares	0.26%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
09	CITADEL ADVISORS LLC CIK 1423053 · View history	$1.82M 956,429 shares	0.00%	+956.43KNew	SEC filing ↗ May 15, 2026	▾
10	Sio Capital Management, LLC CIK 1482416 · View history	$1.72M 904,268 shares	0.25%	+164.27K(+22.20%)Added	SEC filing ↗ May 14, 2026	▾
11	MARSHALL WACE, LLP CIK 1318757 · View history	$1.18M 620,602 shares	0.00%	+499.32K(+411.70%)Added	SEC filing ↗ May 15, 2026	▾
12	ADAR1 Capital Management, LLC CIK 1940272 · View history	$892.77K 469,878 shares	0.05%	+64.35K(+15.90%)Added	SEC filing ↗ May 18, 2026	▾
13	SUSQUEHANNA INTERNATIONAL GROUP, LLP CIK 1446194 · View history	$784.18K 412,725 shares	0.00%	+412.73KNew	SEC filing ↗ May 15, 2026	▾
14	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$776.83K 408,858 shares	0.00%	-47.48K(-10.40%)Reduced	SEC filing ↗ May 15, 2026	▾
15	Walleye Capital LLC CIK 1758720 · Amended · View history	$738.25K 388,554 shares	0.00%	+190.18K(+95.90%)Added	SEC filing ↗ May 13, 2026	▾
16	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$736.60K 387,567 shares	0.00%	+164.96K(+74.10%)Added	SEC filing ↗ May 15, 2026	▾
17	NOESIS CAPITAL MANGEMENT CORP CIK 1262677 · View history	$591.85K 311,500 shares	0.09%	+87.30K(+38.90%)Added	SEC filing ↗ May 5, 2026	▾
18	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$551.78K 290,413 shares	0.00%	+174.62K(+150.80%)Added	SEC filing ↗ May 18, 2026	▾
19	BOOTHBAY FUND MANAGEMENT, LLC CIK 1549230 · View history	$483.38K 254,412 shares	0.01%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
20	SILVERARC CAPITAL MANAGEMENT, LLC CIK 1816307 · View history	$429.40K 226,000 shares	0.05%	+120.00K(+113.20%)Added	SEC filing ↗ May 14, 2026	▾

Showing 20 / 52 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

19,427,041

Not deduplicated across managers

Disclosed value

$36.91M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

iBio, Inc. · Q1 2026

Explore all 52 reporting institutions.

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.