iSpecimen Inc. (ISPC) Institutional Ownership

Institutions by Trading Activity

5,839,580Shares Outstanding

531,560Shares held by institutions

$1,594,680Value of institutional holdings

9.10%Institutional ownership %

642.10%Shares Changed QoQ

11No. of institutional investors

iSpecimen Inc. (NASDAQ:ISPC) appears in 11 institutional 13F filings for the quarter ending December 2025.

Their combined ownership stood at 2.2% of outstanding shares in December 2025, down from 5.9% in September 2025.
They increased total shares held in iSpecimen by 31.07% from the prior quarter, while the number of investors in ISPC increased 37.5% year over year.
During the quarter, 4 of these 11 funds increased positions in ISPC, 3 reduced exposure, and 4 held steady.
Combined, these investors held 126.66K shares in ISPC for December 2025, up by 30.02K shares quarter on quarter, and up 90.91K shares year over year.
As of December 31, 2025, GEODE CAPITAL MANAGEMENT, LLC held the largest stake in iSpecimen with 313.1K shares, accounting for 5.36% of total shares outstanding.
The largest buyers of iSpecimen for the quarter ending December 2025 were GEODE CAPITAL MANAGEMENT, LLC (271.5K), CITADEL ADVISORS LLC (50.47K), UBS Group AG (47.3K), JANE STREET GROUP, LLC (41.54K), VANGUARD FIDUCIARY TRUST CO (28.17K).
Top sellers of ISPC stock for the quarter ending December 2025 included Tower Research Capital LLC (TRC) (13).
According to Business Quant data, leading holders of ISPC for December 2025 are GEODE CAPITAL MANAGEMENT, LLC (313.1K), JANE STREET GROUP, LLC (55.63K), UBS Group AG (53.74K), CITADEL ADVISORS LLC (50.47K), VANGUARD FIDUCIARY TRUST CO (28.17K), StoneX Group Inc. (19.71K), Tower Research Capital LLC (TRC) (6.65K), BlackRock, Inc. (2.83K), VANGUARD CAPITAL MANAGEMENT LLC (1.24K), SBI Securities Co., Ltd. (19).

531,560 Total Shares Held

Rows:

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
GEODE CAPITAL MANAGEMENT, LLC	31 Mar, 2026	313,098	271,504	652.75%	$49,155.00
JANE STREET GROUP, LLC	31 Mar, 2026	55,631	41,538	294.74%	$8,734.00
UBS Group AG	31 Mar, 2026	53,744	47,299	733.89%	$8,438.00
CITADEL ADVISORS LLC	31 Mar, 2026	50,471	50,471	0.00%	$7,924.00
GEODE CAPITAL MANAGEMENT, LLC	31 Mar, 2026	41,594	-96	-0.23%	$10,817.00
VANGUARD GROUP INC	31 Mar, 2026	29,407	0	0.00%	$7,646.00
VANGUARD FIDUCIARY TRUST CO	31 Mar, 2026	28,170	28,170	0.00%	$4,423.00
StoneX Group Inc.	31 Mar, 2026	19,710	19,710	0.00%	$3,094.00
SUSQUEHANNA INTERNATIONAL GROUP, LLP	31 Mar, 2026	15,063	15,063	0.00%	$3,918.00
JANE STREET GROUP, LLC	31 Mar, 2026	14,093	-6,164	-30.43%	$3,666.00
Jump Financial, LLC	31 Mar, 2026	10,473	10,473	0.00%	$2,724.00
Tower Research Capital LLC (TRC)	31 Mar, 2026	6,664	4,307	182.73%	$1,733.00
Tower Research Capital LLC (TRC)	31 Mar, 2026	6,651	-13	-0.20%	$1,044.00
UBS Group AG	31 Mar, 2026	6,445	6,445	0.00%	$1,676.00
BlackRock, Inc.	31 Mar, 2026	2,827	0	0.00%	$444.00
BlackRock, Inc.	31 Mar, 2026	2,827	0	0.00%	$735.00
VANGUARD CAPITAL MANAGEMENT LLC	31 Mar, 2026	1,237	1,237	0.00%	$194.00
Bank Of America Corp /De/	31 Mar, 2026	83	-7	-7.78%	$22.00
SBI Securities Co., Ltd.	31 Mar, 2026	19	15	375.00%	$3.00
SBI Securities Co., Ltd.	31 Mar, 2026	4	0	0.00%	$1.00

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