FMR LLC

Position in IRON — Disc Medicine, Inc.

CIK 315066 BOSTON, MA

Position in IRON

as of Jun 30, 2026 · filed Aug 13, 2026 Compact

Position Value

$357,981,753

+$755,753 QoQ

Shares Held

4,894,473

-12.4% QoQ

Ownership

12.7%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

of 216 holders

Holding Since

Mar 2021

22 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Healthcare · as of Jun 30, 2026

FMR LLC holds $61,424,667,384 across 370 Biotechnology names. IRON ranks #43 (0.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ARGX	Argenx SE	5,231,452	$4,853,584,218
2	ALNY	Alnylam Pharmaceuticals, Inc.	15,023,962	$4,522,663,276
3	MRNA	Moderna, Inc.	51,859,891	$3,631,748,165
4	ROIV	Roivant Sciences Ltd.	81,020,390	$2,867,311,601
5	RVMD	Revolution Medicines, Inc.	12,200,422	$2,284,895,029
6	IONS	Ionis Pharmaceuticals Inc	24,631,956	$1,953,067,789
7	INSM	INSMED Inc	16,143,583	$1,721,228,815
8	KRYS	Krystal Biotech, Inc.	4,418,197	$1,642,111,277

23 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$356,592,022	4,875,472	—	Shares	Sole	2026-08-06
2026-06-30	$357,981,753	4,894,473	-12.4%	Shares	Defined	2026-08-13
2026-03-31	$357,226,000	5,586,894	+2.5%	Shares	Defined	2026-05-15
2025-12-31	$432,802,127	5,450,222	+10.4%	Shares	Defined	2026-02-17
2025-09-30	$326,115,305	4,935,159	+52.1%	Shares	Defined	2025-11-13
2025-06-30	$171,892,799	3,245,710	+0.7%	Shares	Defined	2025-08-14
2025-03-31	$160,058,270	3,224,381	+72.8%	Shares	Defined	2025-05-12
2024-12-31	$118,320,122	1,866,248	+358.7%	Shares	Defined	2025-02-13
2024-09-30	$19,990,839	406,814	-1.5%	Shares	Defined	2024-11-13
2024-06-30	$18,618,281	413,097	+2.4%	Shares	Defined	2024-08-13
2024-03-31	$25,123,902	403,532	+85.6%	Shares	Defined	2024-05-13
2023-12-31	$12,557,716	217,412	-28.8%	Shares	Defined	2024-02-13
2023-09-30	$14,349,241	305,433	-5.5%	Shares	Defined	2023-11-13
2023-06-30	$14,343,596	323,054	+113.0%	Shares	Defined	2023-08-11
2023-03-31	$3,214,501	151,699	-21.5%	Shares	Defined	2023-08-11
2022-12-31	$3,843,503	193,238	—	Shares	Defined	2023-02-13
2022-09-30 GMTX	—	394,578	-0.3%	Shares	Defined	2022-11-10
2022-06-30 GMTX	—	395,684	-0.4%	Shares	Defined	2022-08-12
2022-03-31 GMTX	—	397,346	-78.9%	Shares	Defined	2022-05-13
2021-12-31 GMTX	—	1,887,241	-0.3%	Shares	Defined	2022-02-14
2021-09-30 GMTX	—	1,893,300	-34.8%	Shares	Defined	2022-02-14
2021-06-30 GMTX	—	2,905,800	+4.2%	Shares	Defined	2021-08-13
2021-03-31 GMTX	—	2,789,500	—	Shares	Defined	2021-05-14
No filing history on record for this holder in this stock.