RENAISSANCE TECHNOLOGIES LLC

Position in IRWD — Ironwood Pharmaceuticals Inc

CIK 1037389 NEW YORK, NY

Back to IRWD Full portfolio

Position in IRWD

as of Mar 31, 2026 · filed May 14, 2026 Compact

Position Value

$28,294,366

+$643,607 QoQ

Shares Held

8,061,073

-1.8% QoQ

Ownership

4.90%

of shares outstanding

% of Portfolio

0.05%

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

RENAISSANCE TECHNOLOGIES LLC holds $2,198,269,231 across 49 Drug Manufacturers - Specialty & Generic names. IRWD ranks #12 (1.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	UTHR	UNITED THERAPEUTICS Corp	1,787,019	$1,059,666,526
2	NBIX	Neurocrine Biosciences Inc	2,418,897	$318,665,490
3	ALKS	Alkermes plc.	6,160,428	$217,832,734
4	RDY	Dr Reddys Laboratories Ltd	7,859,728	$108,857,232
5	SUPN	Supernus Pharmaceuticals, Inc.	1,705,222	$88,142,925
6	TAK	Takeda Pharmaceutical Co Ltd	2,989,100	$55,358,132
7	COLL	Collegium Pharmaceutical, Inc	1,469,449	$48,594,678
8	HIMS	Hims & Hers Health, Inc.	2,118,080	$43,971,340

All Filings in IRWD

Export CSV

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$28,294,366	8,061,073	-1.8%	Shares	Sole	2026-05-14
2025-12-31	$27,650,759	8,204,973	-1.8%	Shares	Sole	2026-02-12
2025-09-30	$10,941,346	8,352,173	-0.6%	Shares	Sole	2025-11-13
2025-06-30	$6,052,441	8,406,169	-15.4%	Shares	Sole	2025-08-13
2025-03-31	$14,612,523	9,940,492	+9.6%	Shares	Sole	2025-05-14
2024-12-31	$40,163,447	9,066,241	+5.5%	Shares	Sole	2025-02-13
2024-09-30	$35,420,455	8,597,198	+0.3%	Shares	Sole	2024-11-13
2024-06-30	$55,888,774	8,571,898	+20.7%	Shares	Sole	2024-08-09
2024-03-31	$61,839,266	7,099,801	+7.6%	Shares	Sole	2024-05-13
2023-12-31	$75,457,073	6,595,898	+13.7%	Shares	Sole	2024-02-13
2023-09-30	$55,853,017	5,799,898	+9.0%	Shares	Sole	2023-11-14
2023-06-30	$56,598,979	5,319,453	+14.7%	Shares	Sole	2023-08-11
2023-03-31	$48,789,161	4,637,753	+6.0%	Shares	Sole	2023-05-12
2022-12-31	$54,195,755	4,374,153	-18.6%	Shares	Sole	2023-02-13
2022-09-30	$55,665,865	5,373,153	-0.8%	Shares	Sole	2022-11-14
2022-06-30	$62,439,020	5,415,353	+73.4%	Shares	Sole	2022-08-12
2022-03-31	$39,288,006	3,123,053	+16.6%	Shares	Sole	2022-05-13
2021-12-31	$31,240,089	2,679,253	+21.3%	Shares	Sole	2022-02-11
2021-09-30	$28,856,762	2,209,553	-35.7%	Shares	Sole	2021-11-12
2021-06-30	$44,247,742	3,438,053	+9.5%	Shares	Sole	2021-08-13
2021-03-31	$35,113,618	3,140,753	+56.6%	Shares	Sole	2021-05-13
2020-12-31	$22,845,526	2,005,753	+118.6%	Shares	Sole	2021-02-10
2020-09-30	$8,250,599	917,753	-30.1%	Shares	Sole	2020-11-13
2020-06-30	$13,558,962	1,313,853	-12.3%	Shares	Sole	2020-08-13
2020-03-31	$15,119,390	1,498,453	—	Shares	Sole	2020-05-14
No filing history on record for this holder in this stock.