13F

Stock

iSpecimen Inc.

ISPC · held by 11 managers

Reported value

$83.5K

Holders

11

+2 new · −3 exited

Holders’ est. mark

−$7.38K

Price effect on 7 books still in the name

Largest holder

$49.2K

GEODE CAPITAL MANAGEMENT, LLC

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
GEODE CAPITAL MANAGEMENT, LLC313.1K$49.2K−$4.29KAdded$38.3K
JANE STREET GROUP, LLC55.6K$8.73K−$1.45KAdded$5.07K
UBS Group AG53.7K$8.44K−$664Added$6.76K
Citadel50.5K$7.92KNew
VANGUARD FIDUCIARY TRUST CO28.2K$4.42KHeld
StoneX Group Inc.19.7K$3.09KNew
Tower Research Capital LLC (TRC)6.65K$1.04K−$686Cut−$689
BlackRock, Inc.2.83K$444−$291Cut−$291
VANGUARD CAPITAL MANAGEMENT LLC1.24K$194Held
SBI Securities Co., Ltd.19$3−$0Added$2
Sachetta, LLC2$1$0Held

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.