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KRRO · NASDAQ · Biotechnology

Korro Bio (KRRO)

Develops RNA-editing therapeutics around OPERA and GalNAc-delivered liver programs.

$12.25

Pre-market+0.32 (+2.68%)

At close$11.93(−2.53%)

Watchlist

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Breakdown13F · 13D/G · Form 4

Institutions112 holders · as of Jun 30, 2026 · largest filers plus last quarter's tail	≈ 98.13%	14.45M shares
Insiders7 holders · as of Aug 28, 2026	16.73%	2.46M shares
Adds to	114.86%

14.73M company shares as of Sep 3, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing

Two share counts disagree (14.73M in the company's Sep 3, 2026 report, 9.95M elsewhere); stakes use the report.

This quarter's institutional total failed a plausibility check; shown: the largest filers plus last quarter's remainder.

These groups come from separate filings that can overlap, so they add to 114.86%; nothing is left for Other.

Top shareholders13F · 13D/G · Form 4

Holder	Stake	Shares	Evidence
Lynx1 Capital Management LPInstitution	10.45%	1.54M	13Fas of Jun 30, 2026
Venrock Healthcare Capital Partners III, L.P.Institution	10.11%	1.49M	13Gfiled Mar 17, 2026 ↗
Ali Behbahani^1,2Insiderdirector, 10 percent owner	9.89%	1.46M	13Dfiled Mar 12, 2026 ↗
Nea Management Company, LLCInstitution	8.81%	1.30M	13Fas of Jun 30, 2026
VR Adviser, LLCInstitution	6.86%	1.01M	13Fas of Jun 30, 2026
Atlas Venture Life Science Advisors, LLCInstitution	6.54%	962,884	13Fas of Jun 30, 2026
Balyasny Asset Management L.P.Institution	6.46%	951,783	13Fas of Jun 30, 2026
Jean Francois FormelaInsiderdirector	5.58%	821,950	Form 4filed Aug 28, 2026 ↗
BlackRock, Inc.Institution	5.55%	817,621	13Fas of Jun 30, 2026
Affinity Asset Advisors, LLCInstitution	4.80%	706,904	13Fas of Jun 30, 2026
Nantahala Capital Management, LLCInstitution	4.48%	660,036	13Fas of Jun 30, 2026
Adage Capital Partners GP, L.L.C.Institution	3.67%	540,968	13Fas of Jun 30, 2026
Adar1 Capital Management, LLCInstitution	3.67%	540,054	13Fas of Jun 30, 2026
Vanguard Capital Management LLCInstitution	3.09%	454,778	13Fas of Jun 30, 2026
Driehaus Capital Management LLCInstitution	3.06%	450,045	13Fas of Jun 30, 2026
TCG Crossover Management, LLCInstitution	2.83%	416,301	13Fas of Jun 30, 2026
Kalehua Capital Management LLCInstitution	2.75%	405,040	13Fas of Jun 30, 2026
Siren, L.L.C.Institution	2.36%	347,718	13Fas of Jun 30, 2026
AQR Capital Management LLCInstitution	2.03%	298,974	13Fas of Jun 30, 2026
Geode Capital Management, LLCInstitution	2.02%	296,870	13Fas of Jun 30, 2026
72 Investment Holdings, LLCInstitution	1.88%	276,831	13Fas of Jun 30, 2026
State Street CorpInstitution	1.58%	232,587	13Fas of Jun 30, 2026
Vanguard Portfolio Management LLCInstitution	1.52%	223,551	13Fas of Jun 30, 2026
Two Sigma Investments, LPInstitution	1.21%	178,071	13Fas of Jun 30, 2026
JPMorgan Chase & CoInstitution	0.85%	124,726	13Fas of Jun 30, 2026

Ali Behbahani's transaction reports restate only vehicles that traded; the 2026 ownership statement (1.46M) is used instead.
Ali Behbahani reports a block also reported by another filer; it is counted once, under that filer.

13F — a manager's quarterly holdings · 13D/13G — an ownership statement filed at 5% or more · Form 4 — an insider's transaction report

Institutions13F, as of Jun 30, 2026

112 holders · 14.45M shares · 22 new positions · 68 increased · 21 reduced · 13 closed

Holder	Shares	% outstanding	Chg q/q	Filed
LYNX1 Capital Management LP	1.54M	10.45%	0	Aug 13, 2026
Nea Management Company, LLC	1.30M	8.81%	0	Aug 14, 2026
VR Adviser, LLC	1.01M	6.86%	0	Aug 14, 2026
Atlas Venture Life Science Advisors, LLC	962.9K	6.54%	−174.3K	Aug 13, 2026
Balyasny Asset Management L.P.	951.8K	6.46%	−88.3K	Aug 14, 2026
BlackRock, Inc.	817.6K	5.55%	+357.6K	Aug 7, 2026
Affinity Asset Advisors, LLC	706.9K	4.80%	0	Aug 13, 2026
Nantahala Capital Management, LLC	660.0K	4.48%	0	Aug 19, 2026

Ownership statements13D/G · 5% or more, as filed

Holder	% of class	Shares	Form	Filed
Lynx1 Capital Management LP	10.70%	1.54M	13G	Apr 2, 2026 ↗
Venrock Healthcare Capital Partners III, L.P.	9.90%	1.49M	13G	Mar 17, 2026 ↗
Ali Behbahaniincl. Nea 17 GP, LLC, New Enterprise Associates 17, L.P. +9 more	9.90%	1.46M	13D	Mar 12, 2026 ↗
Nantahala Capital Management, LLC	6.37%	600.0K	13G	Feb 13, 2026 ↗
BlackRock, Inc.	5.20%	747.5K	13G	Jul 29, 2026 ↗

Insider tradesForm 4

Latest trades

Date	Insider	Type	Shares	Avg price	Owned after
Aug 26, 2026	Jean Francois Formeladirector	Sale · 2 lots	300	$13.96	141,002
Aug 19, 2026	Jean Francois Formeladirector	Sale · 2 lots	28,468	$14.00	141,053
Aug 11, 2026	Jean Francois Formeladirector	Sale · 2 lots	2,143	$13.96	145,937
Aug 10, 2026	Lynx1 Capital Management LP10 percent owner	Purchase	1,462	$13.19	1,544,980
Aug 6, 2026	Lynx1 Capital Management LP10 percent owner	Purchase	5,222	$11.40	1,543,518
Aug 4, 2026	Ram Aiyardirector, officer: President and CEO	Sale	5,802	$10.84	69,046
Jul 6, 2026	Jean Francois Formeladirector	Sale · 2 lots	9,323	$13.96	146,305
Jul 2, 2026	Jean Francois Formeladirector	Sale · 2 lots	100,700	$14.03	154,811
Jun 24, 2026	Jean Francois Formeladirector	Sale · 4 lots	48,438	$14.61	169,556
Jun 23, 2026	Jean Francois Formeladirector	Sale · 2 lots	119,005	$14.25	176,649

CongressHouse and Senate disclosures

Not reported.