CHARLES SCHWAB INVESTMENT MANAGEMENT INC

Position in IRWD — Ironwood Pharmaceuticals Inc

CIK 884546 SAN FRANCISCO, CA

Back to IRWD Full portfolio

Position in IRWD

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

Position Value

$16,629,878

-$139,036 QoQ

Shares Held

4,737,857

-4.8% QoQ

Ownership

2.88%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in IRWD Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - Specialty & Generic

Healthcare · as of Mar 31, 2026

CHARLES SCHWAB INVESTMENT MANAGEMENT INC holds $1,628,257,886 across 43 Drug Manufacturers - Specialty & Generic names. IRWD ranks #17 (1.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ZTS	Zoetis Inc.	3,717,247	$439,415,767
2	VTRS	Viatris Inc	13,674,306	$184,739,874
3	UTHR	UNITED THERAPEUTICS Corp	300,481	$178,179,223
4	NBIX	Neurocrine Biosciences Inc	902,788	$118,933,291
5	ELAN	Elanco Animal Health Inc	3,577,850	$85,617,950
6	ALKS	Alkermes plc.	2,236,756	$79,091,692
7	TEVA	Teva Pharmaceutical Industries Ltd	2,087,679	$62,880,891
8	LNTH	Lantheus Holdings, Inc.	657,413	$49,864,776

All Filings in IRWD

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25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$16,629,878	4,737,857	-4.8%	Shares	Sole	2026-05-15
2025-12-31	$16,768,914	4,975,939	+1.2%	Shares	Sole	2026-02-13
2025-09-30	$6,441,710	4,917,336	+34.2%	Shares	Sole	2025-11-10
2025-06-30	$2,638,278	3,664,276	+38.4%	Shares	Sole	2025-08-12
2025-03-31	$3,891,112	2,647,015	+33.5%	Shares	Sole	2025-09-15
2024-12-31	$8,785,753	1,983,240	+4.1%	Shares	Sole	2025-02-06
2024-09-30	$7,845,596	1,904,271	+23.7%	Shares	Sole	2024-11-12
2024-06-30	$10,037,083	1,539,430	+10.6%	Shares	Sole	2024-08-12
2024-03-31	$12,127,830	1,392,403	+8.1%	Shares	Sole	2024-05-09
2023-12-31	$14,742,190	1,288,653	+4.7%	Shares	Sole	2024-02-06
2023-09-30	$11,852,546	1,230,794	-10.3%	Shares	Sole	2023-11-08
2023-06-30	$14,595,611	1,371,768	-9.0%	Shares	Sole	2023-08-10
2023-03-31	$15,850,389	1,506,691	+38.4%	Shares	Sole	2023-05-12
2022-12-31	$13,483,690	1,088,272	+6.8%	Shares	Sole	2023-02-13
2022-09-30	$10,556,197	1,018,938	-9.4%	Shares	Sole	2022-11-14
2022-06-30	$12,968,229	1,124,738	-21.2%	Shares	Sole	2022-08-15
2022-03-31	$17,966,516	1,428,181	-2.4%	Shares	Sole	2022-05-13
2021-12-31	$17,064,305	1,463,491	+1.6%	Shares	Sole	2022-02-11
2021-09-30	$18,807,510	1,440,085	+21.9%	Shares	Sole	2021-11-16
2021-06-30	$15,201,889	1,181,188	-0.7%	Shares	Sole	2021-08-16
2021-03-31	$13,301,908	1,189,795	+3.1%	Shares	Sole	2021-05-17
2020-12-31	$13,149,139	1,154,446	+1.1%	Shares	Sole	2021-02-16
2020-09-30	$10,266,409	1,141,981	+3.3%	Shares	Sole	2020-11-13
2020-06-30	$11,404,353	1,105,073	+12.1%	Shares	Sole	2020-08-20
2020-03-31	$9,945,491	985,678	—	Shares	Sole	2020-05-15
No filing history on record for this holder in this stock.