Zenas BioPharma ZBIO Institutional Ownership

NASDAQ ZBIO

$32.74 -0.18 (-0.55%)

As of: Sep 4, 2026 · 11:49 AM EDT

Institutions by Trading Activity

145 Institutions

Increased 93 64.1%

Unchanged 14 9.7%

Reduced 38 26.2%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

93.77%

▼-5.82 pp QoQ

Shares Held by Institutions

59.18Mn

of 63.11Mn outstanding

▲+9.96% QoQ

Shares Outstanding

63.11Mn

3.93Mn held outside 13F filers

Institutional Investors

145

filed 13F for Jun 2026

▲+6 vs prior quarter

Net Shares Added (QoQ)

+5.36Mn

accumulated since last quarter

Value of Holdings

$1.95Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Zenas BioPharma, Inc. (NASDAQ:ZBIO) is held by 145 institutional investors per 13F filings through June 2026.

They owned 93.8% of outstanding stock in June 2026, down from 99.6% the prior quarter.
They increased total shares held in Zenas BioPharma by 9.96% from the prior quarter, while the number of investors in ZBIO increased 104.23% year over year.
During the quarter, 93 of these 145 funds increased positions in ZBIO, 38 reduced exposure, and 14 held steady.
Altogether, these fund groups held 59.18Mn shares in ZBIO by June 2026, up by 5.36Mn shares quarter on quarter, and up 25.48Mn shares year over year.
FMR LLC leads ownership in ZBIO with 9.51Mn shares as of June 30, 2026, equal to 15.06% of outstanding shares.
The most significant purchases of ZBIO for the quarter ending June 2026 came from PRICE T ROWE ASSOCIATES INC /MD/ (869.66K), Bank Of America Corp /De/ (842.81K), BlackRock, Inc. (648.68K), State Street Corp (584.18K), TWO SIGMA INVESTMENTS, LP (540.09K).
The largest sales of ZBIO for the quarter ending June 2026 came from SILVERARC CAPITAL MANAGEMENT, LLC (626.15K), UBS Group AG (189.32K), MARSHALL WACE, LLP (178.49K), Polar Capital Holdings Plc (135.67K), Sio Capital Management, LLC (123.17K).
According to Business Quant data, leading holders of ZBIO for June 2026 are FMR LLC (9.51Mn), SR ONE CAPITAL MANAGEMENT, LP (5.04Mn), NEA Management Company, LLC (4.02Mn), Enavate Sciences GP, LLC (3.92Mn), Federated Hermes, Inc. (3.12Mn), BlackRock, Inc. (2.69Mn), Capital International Investors (2.5Mn), Polar Capital Holdings Plc (2.41Mn), Fairmount Funds Management LLC (2.36Mn), State Street Corp (2.06Mn).

Form 13F Holdings

145 Institutional Holders

Report period 30 Jun, 2026

Total shares held 59.18Mn

Of outstanding 93.77%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	FMR LLC	0000315066	9,506,701	15.06%	▲424,701	+4.68%	$241.28Mn
2	SR ONE CAPITAL MANAGEMENT, LP	0001910264	5,037,854	7.98%	0	0.00%	$127.86Mn
3	NEA Management Company, LLC	0001512848	4,023,219	6.37%	0	0.00%	$102.11Mn
4	Enavate Sciences GP, LLC	0001953107	3,919,159	6.21%	0	0.00%	$99.47Mn
5	Federated Hermes, Inc.	0001056288	3,116,805	4.94%	▼10,226	-0.33%	$79.10Mn
6	BlackRock, Inc.	0002012383	2,686,225	4.26%	▲648,677	+31.84%	$68.18Mn
7	Capital International Investors	0001562230	2,502,912	3.97%	▲68,912	+2.83%	$63.52Mn
8	Polar Capital Holdings Plc	0001837309	2,412,772	3.82%	▼135,672	-5.32%	$61.24Mn
9	Fairmount Funds Management LLC	0001802528	2,359,025	3.74%	0	0.00%	$59.87Mn
10	State Street Corp	0000093751	2,055,100	3.26%	▲584,177	+39.71%	$52.16Mn
11	NVP Associates, LLC	0001545692	1,838,482	2.91%	0	0.00%	$46.66Mn
12	WELLINGTON MANAGEMENT GROUP LLP	0000902219	1,593,819	2.53%	▲347,766	+27.91%	$40.45Mn
13	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	1,354,864	2.15%	▲109,473	+8.79%	$34.39Mn
14	Bank Of America Corp /De/	0000070858	1,231,159	1.95%	▲842,812	+217.03%	$31.25Mn
15	PRICE T ROWE ASSOCIATES INC /MD/	0000080255	1,226,928	1.94%	▲869,662	+243.42%	$31.14K
16	ALLIANCEBERNSTEIN L.P.	0001109448	1,103,388	1.75%	▲206,067	+22.96%	$21.57Mn
17	GEODE CAPITAL MANAGEMENT, LLC	0001214717	882,654	1.40%	▲226,869	+34.60%	$22.41Mn
18	TWO SIGMA INVESTMENTS, LP	0001179392	815,150	1.29%	▲540,094	+196.36%	$20.69Mn
19	EcoR1 Capital, LLC	0001587114	789,500	1.25%	0	0.00%	$20.04Mn
20	MILLENNIUM MANAGEMENT LLC	0001273087	660,470	1.05%	▲183,652	+38.52%	$16.76Mn

Showing 1 to 20 of 145 holders