Stock Ownership/IRWD

IRONWOOD PHARMACEUTICALS INC (IRWD): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in IRWD · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
13
13F filers
Aggregate Value
$117.0M
Across holders
Last Price
$4.13
2026-08-24
Sector
Health Care
GICS
Quarterly fund activity3 increased9 reduced4 exited
Full exits: FARALLON CAPITAL MANAGEMENT LLC, MILLENNIUM MANAGEMENT LLC, Gotham Asset Management, LLC, Brevan Howard Capital Management LP
Institutional Holders of IRWD
↗
13 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
Hedge Fund7.99M$33.7M28.8%0.0%Reduced$-286KQ2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund6.47M$27.2M23.3%0.0%Reduced+$27.2MQ2 2026
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund4.56M$19.2M16.4%0.0%Reduced$-5.4MQ2 2026
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund4.29M$18.1M15.4%0.0%Reduced+$15.6MQ2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
Hedge Fund3.02M$12.7M10.9%0.0%Reduced$-1.6MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund502K$2.1M1.8%0.0%Added+$1.7MQ2 2026
Man Group plc
CIK 0001637460
Hedge Fund392K$1.7M1.4%0.0%Reduced$-626KQ2 2026
Qube Research & Technologies Ltd
CIK 0001729829
Hedge Fund348K$1.5M1.3%0.0%Reduced$-5.2MQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund123K$517K0.4%0.0%Added+$316KQ2 2026
Squarepoint Ops LLC
CIK 0001642575
Hedge Fund67K$282K0.2%0.0%Added+$144KQ2 2026
RENAISSANCE TECHNOLOGIES LLCReduced
Hedge Fund
$33.7M· 28.8% of total· 0.0% port· 7.99M sh· $-286K QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCReduced
Hedge Fund
$27.2M· 23.3% of total· 0.0% port· 6.47M sh· +$27.2M QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPReduced
Hedge Fund
$19.2M· 16.4% of total· 0.0% port· 4.56M sh· $-5.4M QoQ· Q2 2026
MARSHALL WACE, LLPReduced
Hedge Fund
$18.1M· 15.4% of total· 0.0% port· 4.29M sh· +$15.6M QoQ· Q2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPReduced
Hedge Fund
$12.7M· 10.9% of total· 0.0% port· 3.02M sh· $-1.6M QoQ· Q2 2026
CITADEL ADVISORS LLCAdded
Hedge Fund
$2.1M· 1.8% of total· 0.0% port· 502K sh· +$1.7M QoQ· Q2 2026
Man Group plcReduced
Hedge Fund
$1.7M· 1.4% of total· 0.0% port· 392K sh· $-626K QoQ· Q2 2026
Qube Research & Technologies LtdReduced
Hedge Fund
$1.5M· 1.3% of total· 0.0% port· 348K sh· $-5.2M QoQ· Q2 2026
SHAW D E & CO INCAdded
Hedge Fund
$517K· 0.4% of total· 0.0% port· 123K sh· +$316K QoQ· Q2 2026
Squarepoint Ops LLCAdded
Hedge Fund
$282K· 0.2% of total· 0.0% port· 67K sh· +$144K QoQ· Q2 2026
Schonfeld Strategic Advisors LLCReduced
Hedge Fund
$120K· 0.1% of total· 0.0% port· 28K sh· $-126K QoQ· Q2 2026
Rockefeller Capital Management L.P.Unchanged
Hedge Fund
$12K· 0.0% of total· 0.0% port· 3K sh· $-7K QoQ· Q2 2026
Walleye Capital LLCReduced
Hedge Fund
$4· 0.0% of total· 0.0% port· 1 sh· $-396 QoQ· Q2 2026
1–10 of 13
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