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Disclosery

IRWD IRONWOOD PHARMACEUTICALS INC

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COMMON STOCK (common), issuer CIK 1446847

220 managers (227 13F filers) reported a position in IRWD shares at 2026-03-31, 161,500,481 shares in all. 49 filers opened a position and 25 filers sold out during the quarter.

Managers
220
13F filers
227
New
49
Added
86
Reduced
56
Sold out
25
Shares held by filers
161,500,481

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
ARMISTICE CAPITAL, LLC15,028,000$52.7M1.74%-997,00013F-HRTimeline
VANGUARD GROUP INCgroup of 5 filers holding14,430,728$50.7M+14,355,889Timeline
BlackRock, Inc.in group BlackRock, Inc.13,362,930$46.9M<0.01%+578,12413F-HRTimelineGroup
Sarissa Capital Management LP9,188,635$32.3M20.46%-6,730,80013F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/8,682,907$30.5M<0.01%-2,838,75313F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC8,061,073$28.3M0.04%-143,90013F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC7,535,080$26.4M0.01%+2,811,54913F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP7,456,944$26.2M<0.01%+3,045,72213F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC6,577,272$23.1M0.03%+119,45513F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP5,848,276$20.5M0.02%+2,995,07113F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co4,737,857$16.6M<0.01%-238,08213F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC4,543,522$16M<0.01%+919,98813F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP4,525,064$15.9M0.02%+101,06213F-HRTimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC3,632,477$12.7M0.05%+872,81013F-HRTimeline
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …3,397,242$11.9M0.01%+2,985,18113F-HRTimelineGroup
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.3,348,806$11.8M0.02%+30,66913F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC2,690,634$9.44M<0.01%+1,415,31913F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP2,082,055$7.31M<0.01%+1,751,21913F-HRTimelineGroup
Connor, Clark & Lunn Investment Managem…1,835,424$6.44M0.01%-155,50313F-HRTimeline
Qube Research & Technologies Ltd1,590,081$5.58M0.01%-91,14813F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…1,472,157$5.17M0.01%+1,023,35813F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP1,265,842$4.44M<0.01%+32,15713F-HRTimelineGroup
Hillsdale Investment Management Inc.1,236,628$4.34M0.12%+80,25013F-HRTimeline
Pacer Advisors, Inc.1,134,512$3.98M0.01%new13F-HR/ATimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\1,124,989$3.95M<0.01%+15,06513F-HRTimelineGroup
UBS Group AGin group UBS Group AG933,225$3.28M<0.01%+422,68213F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY824,819$2.9M<0.01%+85,13413F-HRTimelineGroup
FMR LLCin group FMR LLC790,386$2.77M<0.01%+103,64913F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC763,955$2.68M<0.01%-105,87113F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources744,638$2.61M<0.01%+359,05513F-HRTimelineGroup
IEQ CAPITAL, LLC742,723$2.61M0.01%+109,46313F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO742,548$2.61M<0.01%+68,68613F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC713,187$2.5M<0.01%+695,14513F-HRTimeline
GSA CAPITAL PARTNERS LLP654,445$2.3M0.14%+82,83213F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC622,247$2.18M<0.01%-2,197,31513F-HRTimelineGroup
STATE OF WISCONSIN INVESTMENT BOARD598,159$2.1M<0.01%+418,11913F-HRTimeline
MACKENZIE FINANCIAL CORP560,034$1.97M<0.01%+548,49013F-HRTimeline
Integrated Quantitative Investments LLC552,104$1.94M0.35%+449,45013F-HRTimeline
Invesco Ltd.in group Invesco Ltd.547,360$1.92M<0.01%+98,14113F-HRTimelineGroup
Man Group plcin group Man Group plc540,864$1.9M<0.01%+493,20513F-HRTimelineGroup
WEDGE CAPITAL MANAGEMENT L L P/NC540,492$1.9M0.04%new13F-HRTimeline
Inspire Investing, LLCin group Inspire Investing, LLC509,941$1.79M0.1%new13F-HRTimelineGroup
LOS ANGELES CAPITAL MANAGEMENT LLC509,247$1.79M0.01%-125,08413F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp484,036$1.7M<0.01%-26,17113F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC457,114$1.6M<0.01%-103,59913F-HRTimelineGroup
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…453,515$1.59M<0.01%-50,42713F-HRTimelineGroup
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC449,839$1.58M<0.01%+308,71013F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC440,493$1.55M0.03%-55,50013F-HRTimeline
Range Financial Group LLC433,256$1.52M0.51%+7,16113F-HRTimeline
Amundiin group Amundi404,237$1.42M<0.01%-238,59313F-HRTimelineGroup
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …375,288$1.32M<0.01%new13F-HRTimelineGroup
Cerity Partners LLCin group Cerity Partners LLC368,370$1.29M<0.01%+29,85813F-HRTimelineGroup
CM Management, LLC350,000$1.23M1.03%new13F-HRTimeline
Robeco Institutional Asset Management B…in group Robeco Institutional Asset Ma…342,998$1.2M<0.01%013F-HRTimelineGroup
LSV ASSET MANAGEMENT308,271$1.08M<0.01%+299,22313F-HRTimeline
Tidal Investments LLCin group Tidal Investments LLC304,475$1.07M<0.01%new13F-HRTimelineGroup
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC290,189$1.02M<0.01%-710,25613F-HRTimelineGroup
CWM, LLCin group CWM, LLC278,217$977K<0.01%+45,23313F-HRTimelineGroup
SEGALL BRYANT & HAMILL, LLC278,201$976K0.01%new13F-HR/ATimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…261,789$915K<0.01%-3,56813F-HRTimelineGroup
GLOBEFLEX CAPITAL L P259,809$912K0.14%new13F-HRTimeline
Harvest Investment Services, LLC241,881$849K0.16%+221,71113F-HRTimeline
WINTON GROUP Ltdin group WINTON GROUP Ltd241,746$849K0.03%+77,41113F-HRTimelineGroup
Nuveen, LLCin group TIAA233,412$819K<0.01%+93,92513F-HRTimelineGroup
OMERS ADMINISTRATION Corp226,310$794K0.01%+11,20013F-HRTimeline
Walleye Capital LLCin group Walleye Capital LLC225,136$790K<0.01%-302,80013F-HR/ATimelineGroup
Rafferty Asset Management, LLC216,623$760K<0.01%+151,78213F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…226,688$741K<0.01%+71,16513F-HRTimeline
Mariner, LLCin group Mariner, LLC207,779$729K<0.01%+93,66013F-HRTimelineGroup
MARTINGALE ASSET MANAGEMENT L P204,991$720K0.02%new13F-HRTimeline
RHUMBLINE ADVISERS192,934$677K<0.01%-6,97413F-HRTimeline
Hennion & Walsh Asset Management, Inc.184,485$648K0.02%-11,54713F-HRTimeline
Vident Advisory, LLCin group Vident Advisory, LLC184,337$647K0.01%new13F-HRTimelineGroup
Creative Planningin group Creative Planning177,520$623K<0.01%+15,44513F-HRTimelineGroup
KLP KAPITALFORVALTNING AS174,200$611K<0.01%013F-HRTimeline
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…165,094$579K<0.01%new13F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.165,790$559K<0.01%-33,73013F-HRTimeline
Legato Capital Management LLC156,059$548K0.05%new13F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC145,819$512K<0.01%+117,06013F-HRTimelineGroup
CANADA PENSION PLAN INVESTMENT BOARD135,000$474K<0.01%-53,00013F-HRTimeline
Virtus Investment Advisers, LLCgroup of 2 filers holding134,169$471K+1,858Timeline
Quantinno Capital Management LP129,703$455K<0.01%+10,81013F-HRTimeline
O'SHAUGHNESSY ASSET MANAGEMENT, LLC128,243$450K<0.01%-162,03513F-HRTimeline
State of Wyoming128,175$450K0.05%-29,15013F-HRTimeline
Mirae Asset Global Investments Co., Ltd.group of 2 filers holding126,799$441K+12,606Timeline
PRICE T ROWE ASSOCIATES INC /MD/124,314$437K<0.01%+24,95113F-HRTimeline
Focus Partners Wealthgroup of 2 filers holding119,257$419K+15,675Timeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC118,276$415K<0.01%-105,69313F-HRTimelineGroup
MERCER GLOBAL ADVISORS INC /ADV115,080$404K<0.01%+38,12913F-HRTimeline
SG Americas Securities, LLC113,630$399K<0.01%+55,88313F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO118,191$382K<0.01%-96,41613F-HR/ATimelineGroup
Cercano Management LLC101,378$356K0.02%013F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC99,341$349K<0.01%-20,62813F-HR/ATimelineGroup
STRS OHIO97,400$342K<0.01%+20,80013F-HRTimeline
PROFUND ADVISORS LLC97,281$341K0.01%+70,79813F-HRTimeline
Optimist Retirement Group LLC94,831$333K0.15%+34,91913F-HRTimeline
FULLER & THALER ASSET MANAGEMENT, INC.91,081$320K<0.01%new13F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC89,970$316K<0.01%-302,93413F-HRTimelineGroup
Allspring Global Investments Holdings, …in group Allspring Global Investments …79,193$309K<0.01%new13F-HRTimelineGroup
RITHOLTZ WEALTH MANAGEMENT87,535$307K0.01%new13F-HRTimeline
EntryPoint Capital, LLC86,874$305K0.09%+20,24913F-HRTimeline
Pallas Capital Advisors LLC80,567$283K0.01%-7,40813F-HRTimeline
Engineers Gate Manager LP79,852$280K<0.01%+41,15113F-HRTimeline
SmartHarvest Portfolios, LLC75,462$265K0.11%-12313F-HRTimeline
CAPTRUST FINANCIAL ADVISORS74,930$263K<0.01%+11,10813F-HRTimeline
CIBC WORLD MARKET INC.71,330$250K<0.01%-113F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…67,030$235K<0.01%-85813F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…63,767$224K<0.01%-23,75413F-HRTimelineGroup
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/62,750$220K<0.01%new13F-HRTimelineGroup
WEDBUSH SECURITIES INC60,703$213K0.01%-3,03013F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN58,850$207K<0.01%-117,73213F-HR/ATimelineGroup
Schonfeld Strategic Advisors LLC58,377$205K<0.01%new13F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …56,132$197K<0.01%-22,88113F-HRTimelineGroup
SCOTIA CAPITAL INC.55,272$194K<0.01%-11,91113F-HRTimeline
Merit Financial Group, LLC54,707$192K<0.01%+5,32913F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.47,938$168K<0.01%-69,50813F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS45,643$160K<0.01%+13,18913F-HRTimelineGroup
Police & Firemen's Retirement System of…44,115$155K<0.01%013F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/44,094$155K<0.01%new13F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …43,005$151K<0.01%-4,58313F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND41,869$147K<0.01%013F-HRTimeline
Krilogy Financial LLC33,194$144K<0.01%+2,97113F-HRTimeline
BRIGHTON JONES LLC40,039$141K<0.01%new13F-HR/ATimeline
CITIGROUP INCin group CITIGROUP INC39,405$138K<0.01%+23,90413F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC39,043$137K<0.01%-32,53013F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC32,746$115K<0.01%-56,13413F-HRTimelineGroup
nVerses Capital, LLC32,554$114K0.1%new13F-HRTimeline
Graham Capital Management, L.P.30,821$108K<0.01%new13F-HRTimeline
ProShare Advisors LLC30,474$107K<0.01%-5,84113F-HRTimeline
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC29,706$104K<0.01%+6,27013F-HRTimelineGroup
China Universal Asset Management Co., L…28,936$102K0.01%+2,42813F-HRTimeline
Integrated Wealth Concepts LLC28,572$100K<0.01%+17,13613F-HRTimeline
Vise Technologies, Inc.29,680$100K<0.01%013F-HRTimeline
E Fund Management Co., Ltd.27,230$95.6K<0.01%13F-HRTimeline
COMMONWEALTH EQUITY SERVICES, LLC26,478$92.9K<0.01%013F-HRTimeline
GRIMES & Co WEALTH MANAGEMENT, LLC25,887$90.9K<0.01%013F-HRTimeline
Essential Partners LLC22,102$77.6K0.03%+2113F-HRTimeline
Chicago Partners Investment Group LLC18,483$77.3K<0.01%new13F-HRTimeline
OVERSEA-CHINESE BANKING Corp Ltdin group OVERSEA-CHINESE BANKING Corp …21,465$75.3K<0.01%013F-HRTimelineGroup
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…20,336$71.4K<0.01%+6,65613F-HR/ATimelineGroup
HighTower Advisors, LLC19,920$69.9K<0.01%+3,77013F-HRTimeline
Broderick Brian C18,000$63.2K0.01%013F-HRTimeline
SIMPLEX TRADING, LLC17,724$62.2K<0.01%new13F-HRTimeline
NorthCrest Asset Manangement, LLC17,399$61.6K<0.01%+4,24213F-HRTimeline
Abacus Wealth Partners, LLC17,531$61.5K0.01%new13F-HRTimeline
Virtu Financial LLCin group Virtu Financial LLC16,960$60K<0.01%new13F-HRTimelineGroup
Scientech Research LLC15,917$55.9K0.05%new13F-HRTimeline
EVOLVE PRIVATE WEALTH, LLC15,467$54.3K<0.01%+65813F-HRTimeline
DGS Capital Management, LLCin group DGS Capital Management, LLC14,883$52.2K0.01%+4,45813F-HRTimelineGroup
Calamos Advisors LLCin group Calamos Advisors LLC14,520$51K<0.01%013F-HRTimelineGroup
XPONANCE LLC14,337$50.3K<0.01%+1,91813F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc14,288$50.2K<0.01%-2,40213F-HRTimelineGroup
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…14,218$49.9K<0.01%new13F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…13,773$48.3K<0.01%013F-HRTimelineGroup
Bull Harbor Capital LLC13,721$48.2K0.01%13F-HRTimeline
NINE MASTS CAPITAL Ltd13,527$47.5K0.01%new13F-HRTimeline
Y-Intercept (Hong Kong) Ltd13,470$47.3K<0.01%new13F-HRTimeline
FARALLON CAPITAL MANAGEMENT, L.L.C.13,000$45.6K<0.01%013F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
AXQ CAPITAL, LP12,949$45.5K0.01%new13F-HRTimeline
Abel Hall, LLC12,908$45.3K0.01%-3,75313F-HRTimeline
Ariadne Wealth Management, LP12,564$44.1K0.02%+34013F-HRTimeline
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC12,510$43.9K<0.01%-2,34213F-HRTimelineGroup
EVOKE WEALTH, LLC12,062$42.3K<0.01%+77513F-HRTimeline
waypoint wealth counsel11,999$42.1K0.02%-50413F-HRTimeline
Cetera Investment Advisers11,949$41.9K<0.01%013F-HRTimeline
WADDELL & ASSOCIATES, LLC11,682$41K<0.01%new13F-HRTimeline
MQS Management LLC11,451$40.2K0.03%-96313F-HRTimeline
Simplify Asset Management Inc.11,447$40.2K<0.01%+50113F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…11,406$40K<0.01%-3,74313F-HRTimelineGroup
COLDSTREAM CAPITAL MANAGEMENT INC11,388$40K<0.01%-91213F-HRTimeline
PRINCIPAL FINANCIAL GROUP INCin group PRINCIPAL FINANCIAL GROUP INC11,375$39.9K<0.01%new13F-HRTimelineGroup
Stonebrook Private Inc.10,926$38.4K0.01%-5913F-HRTimeline
Allegiance Financial Group Advisory Ser…10,717$37.6K0.01%new13F-HRTimeline
Gotham Asset Management, LLC10,657$37.4K<0.01%new13F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…8,659$30.4K<0.01%-1,19213F-HRTimeline
MAI Capital Management6,564$23K<0.01%new13F-HRTimeline
Financial Management Professionals, Inc.6,508$22.8K<0.01%new13F-HRTimeline
Owl Creek Wealth Partners LLC6,195$21.7K0.01%13F-HRTimeline
Private Wealth Asset Management, LLC6,000$21.1K<0.01%new13F-HRTimeline
IFP Advisors, Inc4,033$14.2K<0.01%013F-HRTimeline
Allworth Financial LP3,997$14K<0.01%+2,54013F-HRTimeline
GF FUND MANAGEMENT CO. LTD.3,636$12.8K<0.01%+44013F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…3,079$10.8K<0.01%new13F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…2,732$9.59K<0.01%+2,18413F-HRTimelineGroup
GAMMA Investing LLC2,411$8.46K<0.01%-5113F-HRTimeline
True Wealth Design, LLC2,361$8.29K<0.01%013F-HRTimeline
Rialto Wealth Management, LLC2,174$7.63K<0.01%new13F-HRTimeline
WealthCollab, LLC1,970$6.92K<0.01%013F-HRTimeline
ROTHSCHILD INVESTMENT LLC1,784$6.26K<0.01%+81813F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP1,993$6.1K<0.01%+31013F-HRTimelineGroup
Farther Finance Advisors, LLC1,535$5.99K<0.01%+1,48313F-HRTimeline
Arax Advisory Partners1,703$5.98K<0.01%+1,68013F-HRTimeline
Physician Wealth Advisors, Inc.1,669$5.86K<0.01%013F-HRTimeline
NISA INVESTMENT ADVISORS, LLC1,627$5.71K<0.01%013F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.1,514$5.31K<0.01%+57613F-HR/ATimelineGroup
Carolina Wealth Advisors, LLC1,492$5.24K<0.01%new13F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA1,461$5K<0.01%-3,84913F-HRTimelineGroup
Sterling Capital Management LLC1,353$4.75K<0.01%-56313F-HRTimeline
SBI Securities Co., Ltd.1,286$4.51K<0.01%+1,22013F-HRTimeline
IAG Wealth Partners, LLC1,000$3.51K<0.01%new13F-HRTimeline