Korro Bio, Inc. (KRRO) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

9,396,068Shares Outstanding

2,928,057Shares held by institutions

$33,614,094Value of institutional holdings

83.60%Institutional ownership %

23.90%Shares Changed QoQ

80No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Recent 13F filings as of December 2025 show that 80 institutional investors hold a position in Korro Bio, Inc. (NASDAQ:KRRO).

Korro Bio saw its institutional ownership percentage fell to 83.6% in December 2025 from 103.4% in September 2025.
On a quarter-over-quarter basis, institutional holdings shifted by 23.90%, with a year-over-year a decrease of 5.88% in the count of filers.
Of these 80 institutional investors, 44 increased their holdings in Korro Bio, while 21 of them reduced positions, and 15 investors maintained their exposure.
The total number of shares held by institutions in Korro Bio increased to 7.85Mn as of December 2025, a net change of up by 1.52Mn shares quarter on quarter, and down 1.59Mn shares year over year.
With 1.14Mn shares, Atlas Venture Life Science Advisors, LLC commands the largest institutional position in Korro Bio as of December 31, 2025, equating to 12.10% of the company.
Among the most significant buyers of Korro Bio during December 2025 were Lynx1 Capital Management LP (677.91K), JANE STREET GROUP, LLC (604.36K), Nantahala Capital Management, LLC (600.00K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (196.83K), VANGUARD GROUP INC (93.98K).
Leading sellers of Korro Bio stock in December 2025 included FMR LLC (525.82K), JPMORGAN CHASE & CO (196.41K), MILLENNIUM MANAGEMENT LLC (99.24K), MORGAN STANLEY (97.77K), CITADEL ADVISORS LLC (95.60K).
The top 10 institutional holders of Korro Bio for the quarter ending December 2025 included Atlas Venture Life Science Advisors, LLC (1.14Mn), NEA Management Company, LLC (1.09Mn), Lynx1 Capital Management LP (677.91K), JANE STREET GROUP, LLC (604.36K), Nantahala Capital Management, LLC (600.00K), VANGUARD GROUP INC (489.64K), BlackRock, Inc. (457.40K), TCG Crossover Management, LLC (416.30K), Siren, L.L.C. (347.72K), 72 Investment Holdings, LLC (276.83K).

80 Institutional Holders

2,928,057 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
Atlas Venture Life Science Advisors, LLC	31 Dec, 2025	1,137,149	0	0.00%	$9,108,563.00
NEA Management Company, LLC	31 Dec, 2025	1,090,793	0	0.00%	$8,737,252.00
Lynx1 Capital Management LP	31 Dec, 2025	677,915	677,915	0.00%	$5,430,099.00
JANE STREET GROUP, LLC	31 Dec, 2025	604,357	604,357	0.00%	$4,840,900.00
Nantahala Capital Management, LLC	31 Dec, 2025	600,000	600,000	0.00%	$4,806,000.00
VANGUARD GROUP INC	31 Dec, 2025	489,639	93,980	23.75%	$3,922,009.00
BlackRock, Inc.	31 Dec, 2025	457,399	10,701	2.40%	$3,663,766.00
TCG Crossover Management, LLC	31 Dec, 2025	416,301	0	0.00%	$3,334,571.00
Siren, L.L.C.	31 Dec, 2025	347,718	-71,115	-16.98%	$2,785,221.00
72 Investment Holdings, LLC	31 Dec, 2025	276,831	0	0.00%	$2,217,416.00
SUSQUEHANNA INTERNATIONAL GROUP, LLP	31 Dec, 2025	196,827	196,827	0.00%	$1,576,584.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	162,760	-172	-0.11%	$1,303,924.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	161,092	-99,241	-38.12%	$1,290,347.00
STATE STREET CORP	31 Dec, 2025	146,221	21,652	17.38%	$1,171,230.00
TWO SIGMA INVESTMENTS, LP	31 Dec, 2025	78,984	14,529	22.54%	$632,662.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	74,900	34,500	85.40%	$599,949.00
MORGAN STANLEY	31 Dec, 2025	69,728	-97,766	-58.37%	$558,521.00
F/m Investments LLC	31 Dec, 2025	65,548	10,303	18.65%	$525,039.00
EMERALD MUTUAL FUND ADVISERS TRUST	31 Dec, 2025	65,548	6,637	11.27%	$525,039.00
CITADEL ADVISORS LLC	31 Dec, 2025	58,329	-95,599	-62.11%	$467,215.00

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