FMR LLC

Position in KRRO — Korro Bio, Inc.

CIK 315066 BOSTON, MA

Position in KRRO

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$440,348

+$137,114 QoQ

Shares Held

38,900

+2.8% QoQ

Ownership

0.270%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Dec 2023

10 quarters on record

Voting authority Sole 86.02313624678663.ToString("F0")% Shared 0.ToString("F0")% None 13.976863753213367.ToString("F0")%

Healthcare · as of Mar 31, 2026

FMR LLC holds $49,674,888,413 across 352 Biotechnology names. KRRO ranks #216 (0.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ALNY	Alnylam Pharmaceuticals, Inc.	14,579,166	$4,823,808,652
2	ARGX	Argenx SE	4,991,034	$3,644,702,577
3	MRNA	Moderna, Inc.	45,672,024	$2,320,138,818
4	ROIV	Roivant Sciences Ltd.	77,981,253	$2,160,080,705
5	INSM	INSMED Inc	13,160,167	$2,151,950,504
6	IONS	Ionis Pharmaceuticals Inc	24,556,637	$1,843,957,869
7	RPRX	Royalty Pharma plc	25,152,242	$1,206,553,046
8	REGN	Regeneron Pharmaceuticals, Inc.	1,518,192	$1,173,015,865

10 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$440,348	38,900	+2.8%	Shares	Defined	2026-05-15
2025-12-31	$303,234	37,857	-93.3%	Shares	Defined	2026-02-17
2025-09-30	$26,994,682	563,681	-11.8%	Shares	Defined	2025-11-13
2025-06-30	$7,983,882	639,222	-0.6%	Shares	Defined	2025-08-14
2025-03-31	$11,199,312	643,269	+0.2%	Shares	Defined	2025-05-12
2024-12-31	$24,431,002	641,739	+10.7%	Shares	Defined	2025-02-13
2024-09-30	$19,368,994	579,563	-9.3%	Shares	Defined	2024-11-13
2024-06-30	$21,647,163	639,125	-12.1%	Shares	Defined	2024-08-13
2024-03-31	$65,448,450	727,205	0.0%	Shares	Defined	2024-05-13
2023-12-31	$34,854,935	727,205	—	Shares	Defined	2024-02-13
No filing history on record for this holder in this stock.