FMR LLC

Position in RYTM — Rhythm Pharmaceuticals, Inc.

CIK 315066 BOSTON, MA

Back to RYTM Full portfolio

Position in RYTM

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

Position Value

$146,950,685

-$35,693,485 QoQ

Shares Held

1,689,671

-1.0% QoQ

Ownership

2.47%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 99.60584042692335.ToString("F0")% Shared 0.ToString("F0")% None 0.39415957307665217.ToString("F0")%

Common Shares in RYTM Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Mar 31, 2026

FMR LLC holds $49,683,576,696 across 351 Biotechnology names. RYTM ranks #66 (0.3% 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

All Filings in RYTM

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25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$146,950,685	1,689,671	-1.0%	Shares	Defined	2026-05-15
2025-12-31	$182,644,170	1,706,317	-20.5%	Shares	Defined	2026-02-17
2025-09-30	$216,642,030	2,145,183	+9.8%	Shares	Defined	2025-11-13
2025-06-30	$123,437,935	1,953,441	+15.7%	Shares	Defined	2025-08-14
2025-03-31	$89,433,222	1,688,375	+1392.7%	Shares	Defined	2025-05-12
2024-12-31	$6,331,841	113,109	+124.9%	Shares	Defined	2025-02-13
2024-09-30	$2,634,954	50,295	+79.7%	Shares	Defined	2024-11-13
2024-06-30	$1,149,228	27,989	-3.6%	Shares	Defined	2024-08-13
2024-03-31	$1,257,436	29,020	-94.5%	Shares	Defined	2024-05-13
2023-12-31	$24,324,105	529,130	-39.1%	Shares	Defined	2024-02-13
2023-09-30	$19,909,766	868,474	+23.8%	Shares	Defined	2023-11-13
2023-06-30	$11,568,294	701,534	+0.4%	Shares	Defined	2023-08-11
2023-03-31	$12,467,020	698,824	-9.6%	Shares	Defined	2023-08-11
2022-12-31	$22,510,575	773,028	-43.6%	Shares	Defined	2023-02-13
2022-09-30	$33,588,226	1,370,948	+146.1%	Shares	Defined	2022-11-10
2022-06-30	$2,311,525	556,994	+0.6%	Shares	Defined	2022-08-12
2022-03-31	$6,380,547	553,867	+1.4%	Shares	Defined	2022-05-13
2021-12-31	$5,452,273	546,320	+556.0%	Shares	Defined	2022-02-14
2021-09-30	$1,087,610	83,278	0.0%	Shares	Defined	2022-02-14
2021-06-30	$1,630,583	83,278	0.0%	Shares	Defined	2021-08-13
2021-03-31	$1,771,323	83,278	+76.5%	Shares	Defined	2021-05-14
2020-12-31	$1,402,601	47,178	-22.1%	Shares	Defined	2021-02-08
2020-09-30	$1,313,158	60,598	-73.2%	Shares	Defined	2020-11-13
2020-06-30	$5,041,539	226,078	0.0%	Shares	Defined	2020-08-24
2020-03-31	$3,440,907	226,078	—	Shares	Defined	2020-05-14
No filing history on record for this holder in this stock.