ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
Position in IRWD — Ironwood Pharmaceuticals Inc
CIK 1164508
BOSTON, MA
Position in IRWD
as of Mar 31, 2026
· filed May 14, 2026
Position Value
$11,924,319
+$10,535,674 QoQ
Shares Held
3,397,242
+724.5% QoQ
Ownership
2.06%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
11 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, 2026ARROWSTREET CAPITAL, LIMITED PARTNERSHIP holds $805,226,112 across 23 Drug Manufacturers - Specialty & Generic names. IRWD ranks #10 (1.5% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ZTS |
Zoetis Inc.
|
1,975,559 | $233,530,829 | |
| 2 | HLN |
Haleon plc
|
14,674,518 | $146,891,925 | |
| 3 | VTRS |
Viatris Inc
|
8,545,196 | $115,445,597 | |
| 4 | INDV |
Indivior Pharmaceuticals, Inc.
|
2,323,264 | $70,813,086 | |
| 5 | TAK |
Takeda Pharmaceutical Co Ltd
|
3,116,311 | $57,714,079 | |
| 6 | ANIP |
Ani Pharmaceuticals Inc
|
564,360 | $43,399,284 | |
| 7 | KNSA |
Kiniksa Pharmaceuticals International, plc
|
892,666 | $42,981,867 | |
| 8 | COLL |
Collegium Pharmaceutical, Inc
|
703,528 | $23,265,670 |
All Filings in IRWD
Export CSV
11 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $11,924,319 | 3,397,242 | Shares | Defined | 2026-05-14 | |
| 2025-12-31 | $1,388,645 | 412,061 | Shares | Defined | 2026-02-13 | |
| 2024-03-31 | $1,531,017 | 175,777 | Shares | Defined | 2024-05-15 | |
| 2023-12-31 | $1,882,417 | 164,547 | Shares | Defined | 2024-02-14 | |
| 2023-09-30 | $1,116,011 | 115,889 | Shares | Defined | 2023-11-14 | |
| 2023-06-30 | $248,603 | 23,365 | Shares | Defined | 2023-08-14 | |
| 2021-12-31 | $3,213,962 | 275,640 | Shares | Defined | 2022-02-14 | |
| 2021-09-30 | $9,608,516 | 735,721 | Shares | Defined | 2021-11-12 | |
| 2020-12-31 | $4,266,340 | 374,569 | Shares | Defined | 2021-02-12 | |
| 2020-06-30 | $294,625 | 28,549 | Shares | Defined | 2020-08-12 | |
| 2020-03-31 | $152,359 | 15,100 | Shares | Defined | 2020-05-15 | |
| No filing history on record for this holder in this stock. | ||||||