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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, 2026

ARROWSTREET 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

All Filings in IRWD

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11 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $11,924,319 3,397,242
2025-12-31 $1,388,645 412,061
2024-03-31 $1,531,017 175,777
2023-12-31 $1,882,417 164,547
2023-09-30 $1,116,011 115,889
2023-06-30 $248,603 23,365
2021-12-31 $3,213,962 275,640
2021-09-30 $9,608,516 735,721
2020-12-31 $4,266,340 374,569
2020-06-30 $294,625 28,549
2020-03-31 $152,359 15,100