RENAISSANCE TECHNOLOGIES LLC
Position in IRWD — Ironwood Pharmaceuticals Inc
CIK 1037389
NEW YORK, NY
Position in IRWD
as of Jun 30, 2026
· filed Aug 13, 2026
Position Value
$33,651,481
+$5,357,115 QoQ
Shares Held
7,993,226
-0.8% QoQ
Ownership
4.84%
of shares outstanding
% of Portfolio
0.05%
of 13F equity value
Holder Rank
#6
of 212 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in IRWD Over Time
Shares Held
Position Value (USD)
Position in Drug Manufacturers - Specialty & Generic
Healthcare · as of Jun 30, 2026RENAISSANCE TECHNOLOGIES LLC holds $2,242,873,379 across 49 Drug Manufacturers - Specialty & Generic names. IRWD ranks #10 (1.5% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | UTHR |
UNITED THERAPEUTICS Corp
|
1,708,739 | $925,846,052 | |
| 2 | NBIX |
Neurocrine Biosciences Inc
|
2,335,897 | $393,692,080 | |
| 3 | ALKS |
Alkermes plc.
|
6,460,928 | $338,552,627 | |
| 4 | RDY |
Dr Reddys Laboratories Ltd
|
7,347,028 | $106,458,435 | |
| 5 | ZTS |
Zoetis Inc.
|
1,403,300 | $100,841,138 | |
| 6 | SUPN |
Supernus Pharmaceuticals, Inc.
|
1,478,180 | $68,750,151 | |
| 7 | COLL |
Collegium Pharmaceutical, Inc
|
1,366,549 | $49,469,073 | |
| 8 | PCRX |
Pacira BioSciences, Inc.
|
1,733,801 | $43,986,531 |
All Filings in IRWD
Export CSV
26 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $33,651,481 | 7,993,226 | Shares | Sole | 2026-08-13 | |
| 2026-03-31 | $28,294,366 | 8,061,073 | Shares | Sole | 2026-05-14 | |
| 2025-12-31 | $27,650,759 | 8,204,973 | Shares | Sole | 2026-02-12 | |
| 2025-09-30 | $10,941,346 | 8,352,173 | Shares | Sole | 2025-11-13 | |
| 2025-06-30 | $6,052,441 | 8,406,169 | Shares | Sole | 2025-08-13 | |
| 2025-03-31 | $14,612,523 | 9,940,492 | Shares | Sole | 2025-05-14 | |
| 2024-12-31 | $40,163,447 | 9,066,241 | Shares | Sole | 2025-02-13 | |
| 2024-09-30 | $35,420,455 | 8,597,198 | Shares | Sole | 2024-11-13 | |
| 2024-06-30 | $55,888,774 | 8,571,898 | Shares | Sole | 2024-08-09 | |
| 2024-03-31 | $61,839,266 | 7,099,801 | Shares | Sole | 2024-05-13 | |
| 2023-12-31 | $75,457,073 | 6,595,898 | Shares | Sole | 2024-02-13 | |
| 2023-09-30 | $55,853,017 | 5,799,898 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $56,598,979 | 5,319,453 | Shares | Sole | 2023-08-11 | |
| 2023-03-31 | $48,789,161 | 4,637,753 | Shares | Sole | 2023-05-12 | |
| 2022-12-31 | $54,195,755 | 4,374,153 | Shares | Sole | 2023-02-13 | |
| 2022-09-30 | $55,665,865 | 5,373,153 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $62,439,020 | 5,415,353 | Shares | Sole | 2022-08-12 | |
| 2022-03-31 | $39,288,006 | 3,123,053 | Shares | Sole | 2022-05-13 | |
| 2021-12-31 | $31,240,089 | 2,679,253 | Shares | Sole | 2022-02-11 | |
| 2021-09-30 | $28,856,762 | 2,209,553 | Shares | Sole | 2021-11-12 | |
| 2021-06-30 | $44,247,742 | 3,438,053 | Shares | Sole | 2021-08-13 | |
| 2021-03-31 | $35,113,618 | 3,140,753 | Shares | Sole | 2021-05-13 | |
| 2020-12-31 | $22,845,526 | 2,005,753 | Shares | Sole | 2021-02-10 | |
| 2020-09-30 | $8,250,599 | 917,753 | Shares | Sole | 2020-11-13 | |
| 2020-06-30 | $13,558,962 | 1,313,853 | 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. | ||||||