Korro Bio

KRRO · NASDAQ

$9.44+$0.53 (+5.95%)TodayMarket closed · Oct 20, 7:41 PM ET

Prev close $8.91

Who owns KRRO

Largest institutional holders, from their latest 13F filings

The 10 largest institutions hold 61.1% of KRRO’s shares.

Lynx1 Capital Advisors LLC10.7%
New Enterprise Associates (NEA)9.0%
VR Adviser, LLC7.0%
Balyasny Asset Management LP6.6%
Next 6 largest institutions27.8%
All other shareholders38.9%

Top institutional holders of KRRO
Holder	Shares	% of shares	Change, last filing	Filed
Lynx1 Capital Advisors LLC	1.54M	10.71%	+6.68K	Aug 10, 2026
New Enterprise Associates (NEA)	1.30M	9.00%	+0	Jun 30, 2026
VR Adviser, LLC	1.01M	7.00%	+0	Jun 30, 2026
Balyasny Asset Management LP	951.78K	6.60%	−88.27K	Jun 30, 2026
Atlas Venture	852.86K	5.91%	−110.02K	Jul 6, 2026
BlackRock Institutional Trust Company, N.A.	709.17K	4.92%	+294.02K	Jun 30, 2026
Affinity Asset Advisors LLC	706.90K	4.90%	+0	Jun 30, 2026
Nantahala Capital Management, LLC	660.04K	4.58%	+0	Jun 30, 2026
Adage Capital Management, L.P.	540.97K	3.75%	+312.57K	Jun 30, 2026
Adar1 Capital Management LLC	540.05K	3.75%	+0	Jun 30, 2026

Largest mutual fund holders

Top mutual fund holders of KRRO
Holder	Shares	% of shares	Change, last filing	Filed
Vanguard Total Stock Market Index Fund	233.06K	1.62%	+0	Mar 31, 2026
iShares Russell 2000 ETF	153.25K	1.06%	−7.67K	Apr 30, 2026
Vanguard Strategic Small-Cap Equity Fund	88.34K	0.61%	+0	Mar 31, 2026
Vanguard Extended Market Index Fund	69.73K	0.48%	+0	Mar 31, 2026
Fidelity Small Cap Index Fund	65.40K	0.45%	−265	Feb 28, 2026

Insider trades

Form 4 filings by officers, directors and large holders

Over the last 6 months, insiders bought $78.81K (2 trades) and sold $5.52M (29 trades) of KRRO on the open market.

Latest KRRO insider transactions
Insider	Date	Type	Shares	Price	Value
FORMELA JEAN FRANCOIS	Sep 14, 2026	Sale	6.60K	$14.12	$93.22K
FORMELA JEAN FRANCOIS	Sep 14, 2026	Sale	31.89K	$14.12	$450.26K
Dolan Oliver	Sep 11, 2026	Sale	5	$13.72	$69
FORMELA JEAN FRANCOIS	Sep 11, 2026	Sale	1.75K	$13.99	$24.48K
FORMELA JEAN FRANCOIS	Sep 11, 2026	Sale	8.45K	$13.99	$118.22K
Dolan Oliver	Sep 9, 2026	Sale	6	$13.60	$82
Dolan Oliver	Sep 8, 2026	Sale	7.35K	$13.51	$99.29K
FORMELA JEAN FRANCOIS	Aug 26, 2026	Sale	51	$13.96	$712
FORMELA JEAN FRANCOIS	Aug 26, 2026	Sale	249	$13.96	$3.48K
FORMELA JEAN FRANCOIS	Aug 19, 2026	Sale	4.88K	$14.00	$68.38K

Short interest

Settled Sep 30, 2026

Shares short: 1.68M
Days to cover: 6.55
% of shares outstanding: 11.62%
Average daily volume: 255.63K
Change since last report: +7.9%

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