Ironwood PharmaceuticalsIRWD

13F holders, Q1 2024 (March 31)
261holders
8famous investors
$8.71avg. 13F price*

At the end of Q1 2024, 261 institutions reported holding Ironwood Pharmaceuticals Inc. (IRWD) in their 13F filings. The largest holders were BlackRock Inc. ($210.4M), Vanguard Group Inc. ($170.0M) and Sarissa Capital Management LP ($142.8M). 8 famous investors held it, including Jim Simons / Peter Brown (0.1% of Renaissance Technologies's portfolio), Joel Greenblatt (0.0% of Gotham Asset Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).

Company
Ironwood Pharmaceuticals Inc.
CUSIP
46333X108
Latest filing quarter
Q2 2026

History

Number of 13F holders

0100200300 Q1 2024: 261Q1 2024Q2 2024: 227Q2 2024Q3 2024: 221Q3 2024Q4 2024: 223Q4 2024Q1 2025: 200Q1 2025Q2 2025: 155Q2 2025Q3 2025: 166Q3 2025Q4 2025: 199Q4 2025Q1 2026: 227Q1 2026Q2 2026: 212Q2 2026

Total Exit/New Position Q1 2024

InstitutionsTotal Value
New Positions53$162.3M
Exits42$114.5M

Ownership 261 holders

BlackRock Inc. 0.00% Reduce -7.0% 24,157,768 $210.4M
Vanguard Group Inc. 0.00% Add +21.8% 19,521,366 $170.0M
Sarissa Capital Management LP 24.97% No change 16,390,000 $142.8M
State Street Corp. 0.01% Add +20.7% 13,917,111 $121.2M
Pacer Advisors, Inc. 0.15% New 7,206,187 $62.8M
Renaissance Technologies 0.10% Add +7.6% 7,099,801 $61.8M
LSV Asset Management 0.11% Reduce -9.3% 6,151,001 $53.6M
Armistice Capital, LLC 1.25% Reduce -5.3% 5,400,000 $47.0M
Jacobs Levy Equity Management, Inc. 0.16% Add +40.8% 4,235,580 $36.9M
Braidwell LP 1.71% New 3,489,843 $30.4M
Geode Capital Management, LLC 0.00% Add +2.2% 3,147,158 $27.4M
UBS Group AG 0.01% Add +579.9% 3,027,715 $26.4M
Man Group plc 0.07% Add +109.4% 2,985,313 $26.0M
Brown Capital Management LLC 0.42% Reduce -27.2% 2,700,705 $23.5M
Morgan Stanley 0.00% Add +24.7% 2,678,116 $23.3M
Nuveen Asset Management, LLC 0.00% Add +0.4% 1,843,243 $16.1M
Kynam Capital Management, LP 1.57% New 1,625,000 $14.2M
Northern Trust Corp. 0.00% Reduce -3.5% 1,532,517 $13.3M
Deutsche Bank AG 0.01% Add +234.5% 1,517,726 $13.2M
Jupiter Asset Management Ltd. 0.12% Reduce -34.8% 1,479,964 $12.9M
Charles Schwab Investment Management Inc. 0.00% Add +8.1% 1,392,403 $12.1M
Glenmede Trust Co. NA 0.06% Add +7.6% 1,390,627 $12.1M
Goldman Sachs Group Inc. 0.00% Add +27.6% 1,379,662 $12.0M
Schonfeld Strategic Advisors LLC 0.09% Add +1698.2% 1,312,244 $11.4M
Two Sigma Advisers, LP 0.03% Reduce -4.2% 1,285,000 $11.2M
Two Sigma Investments, LP 0.03% Add +102.8% 1,188,233 $10.3M
JPMorgan Chase & Co. 0.00% Reduce -18.5% 1,185,225 $10.3M
Bank of New York Mellon Corp 0.00% Reduce -8.0% 1,037,418 $9.0M
Rafferty Asset Management, LLC 0.03% Add +45.0% 1,017,819 $8.9M
First Eagle Investment Management, LLC 0.02% Add +10.5% 1,002,225 $8.7M
Citigroup Inc. 0.01% Add +161.8% 947,710 $8.3M
Saturn V Capital Management LP 3.30% New 944,912 $8.2M
Bank of America Corp. 0.00% Add +32.0% 906,289 $7.9M
Hodges Capital Management Inc. 0.48% New 863,500 $7.5M
Parkman Healthcare Partners LLC 0.91% Add +604.5% 850,000 $7.4M
Citadel Advisors 0.01% Add +68.2% 833,274 $7.3M
Emerald Advisers, LLC 0.29% New 822,749 $7.2M
New York State Common Retirement Fund 0.01% Add +2.2% 809,002 $7.0M
Principal Financial Group Inc. 0.00% Add +0.4% 804,900 $7.0M
Russell Investments Group, Ltd. 0.01% Add +244.8% 777,847 $6.8M
Norges Bank 0.00% Reduce -20.3% 649,179 $5.7M
Emerald Mutual Fund Advisers Trust 0.29% New 644,153 $5.6M
Checkpoint Capital L.P. 3.60% Reduce -29.7% 618,528 $5.4M
BNP Paribas Financial Markets 0.01% Add +6.9% 612,600 $5.3M
Ameriprise Financial Inc. 0.00% Reduce -22.2% 612,407 $5.3M
Royce & Associates LP 0.05% Add +97.8% 591,004 $5.1M
Marshall Wace, LLP 0.01% Add +98.9% 572,500 $5.0M
Invesco Ltd. 0.00% Reduce -7.4% 516,963 $4.5M
AQR Capital Management 0.01% Add +474.3% 469,742 $4.1M
Millennium Management 0.00% Reduce -52.5% 461,444 $4.0M
13D Management LLC 2.23% Add +14.0% 419,284 $3.7M
Legal & General Group Plc 0.00% Add +0.9% 396,607 $3.5M
Redwood Investment Management, LLC 0.30% Add +29.8% 366,691 $3.2M
Rhumbline Advisers 0.00% Reduce -20.8% 363,124 $3.2M
Bridgeway Capital Management, LLC 0.06% New 328,000 $2.9M
American Century Companies Inc. 0.00% Reduce -57.9% 327,133 $2.8M
Franklin Resources Inc. 0.00% Add +989.4% 311,340 $2.7M
Edgestream Partners, L.P. 0.13% New 296,287 $2.6M
Susquehanna International Group, LLP 0.00% Add +68.6% 291,600 $2.5M
Barclays PLC 0.00% Reduce -47.5% 290,245 $2.5M
D. E. Shaw & Co. 0.00% Add +26.0% 288,653 $2.5M
Squarepoint Ops LLC 0.01% Add +225.9% 284,760 $2.5M
Public Sector Pension Investment Board 0.02% Reduce -1.2% 281,618 $2.5M
Swiss National Bank 0.00% No change 276,700 $2.4M
Knott David M Jr 0.85% New 276,000 $2.4M
QRG Capital Management, Inc. 0.03% Reduce -3.4% 250,227 $2.2M
Foundry Partners, LLC 0.11% New 240,573 $2.1M
Mercer Global Advisors Inc. 0.01% Reduce -1.8% 236,223 $2.1M
Healthcare of Ontario Pension Plan Trust Fund 0.01% Reduce -6.2% 236,000 $2.1M
State Board of Administration of Florida Retirement System 0.00% Add +339.4% 195,057 $2.1M
Alberta Investment Management Corp 0.02% No change 210,731 $1.8M
Driehaus Capital Management LLC 0.02% Reduce -86.7% 210,054 $1.8M
TENOR CAPITAL MANAGEMENT Co., L.P. 0.84% New 208,200 $1.8M
Credit Suisse AG/ 0.00% Reduce -96.5% 197,789 $1.7M
State of New Jersey Common Pension Fund D 0.00% Reduce -28.3% 185,503 $1.6M
Gsa Capital Partners LLP 0.12% New 176,172 $1.5M
Arrowstreet Capital, Limited Partnership 0.00% Add +6.8% 175,777 $1.5M
Hillsdale Investment Management Inc. 0.12% Add +8.8% 171,200 $1.5M
Macquarie Group Ltd. 0.00% No change 167,200 $1.5M
Alliancebernstein L.P. 0.00% Reduce -2.3% 163,070 $1.4M
Profund Advisors LLC 0.05% Add +35.5% 161,855 $1.4M
Prudential Financial Inc. 0.00% Reduce -1.3% 156,458 $1.4M
CANADA LIFE ASSURANCE Co 0.00% Add +3.8% 152,492 $1.3M
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% Reduce -4.1% 150,515 $1.3M
Sio Capital Management, LLC 0.45% New 149,400 $1.3M
Dimensional Fund Advisors LP 0.00% Reduce -95.3% 143,771 $1.3M
California State Teachers Retirement System 0.00% Reduce -4.4% 142,018 $1.2M
Phocas Financial Corp. 0.14% New 141,427 $1.2M
Y-Intercept (Hong Kong) Ltd 0.09% New 134,616 $1.2M
Advantage Alpha Capital Partners LP 0.21% Add +4.2% 130,966 $1.1M
Trexquant Investment LP 0.02% New 129,475 $1.1M
Victory Capital Management Inc. 0.00% Reduce -97.0% 127,691 $1.1M
Engineers Gate Manager LP 0.03% Add +16.8% 125,567 $1.1M
State of Wisconsin Investment Board 0.00% Add +2.3% 122,658 $1.1M
Texas Permanent School Fund Corp. 0.01% Add +1.3% 120,245 $1.0M
Thrivent Financial for Lutherans 0.00% Reduce -2.6% 119,192 $1.0M
Kennedy Capital Management LLC 0.02% Add +10.1% 116,543 $1.0M
Artal Group S.A. 0.02% No change 110,532 $963K
Alps Advisors Inc. 0.01% Add +2.9% 110,406 $962K
Public Employees Retirement System of Ohio 0.00% Reduce -3.9% 109,623 $955K
Mirae Asset Global Investments Co., Ltd. 0.00% Add +5.0% 94,683 $936K
Voya Investment Management LLC 0.00% Reduce -8.8% 105,907 $922K
Fisher Asset Management 0.00% Add +1.8% 104,947 $914K
Twinbeech Capital LP 0.02% Add +265.0% 102,768 $895K
Massachusetts Financial Services Co. 0.00% Reduce -0.2% 98,460 $858K
ClariVest Asset Management LLC 0.09% Reduce -0.8% 95,682 $833K
Wellington Management Group LLP 0.00% Reduce -2.4% 95,094 $828K
Clearline Capital LP 0.08% New 92,870 $809K
FMR LLC 0.00% Reduce -8.7% 89,363 $778K
T. Rowe Price Associates Inc. 0.00% Add +6.2% 85,577 $746K
Ensign Peak Advisors, Inc 0.00% Reduce -4.8% 85,392 $744K
Los Angeles Capital Management LLC 0.00% Add +209.9% 85,343 $743K
GMT Capital Corp 0.03% Reduce -76.5% 83,800 $730K
State of Alaska, Department of Revenue 0.01% Reduce -1.0% 83,698 $729K
First Trust Advisors LP 0.00% Reduce -72.6% 81,912 $713K
Manufacturers Life Insurance Company, The 0.00% Add +11.5% 80,087 $698K
Entropy Technologies, LP 0.07% New 79,541 $693K
Allspring Global Investments Holdings, LLC 0.00% Add +63.2% 79,361 $691K
State of Tennessee, Department of Treasury 0.00% Add +3.5% 79,181 $690K
Aquatic Capital Management LLC 0.02% New 78,800 $686K
STRS Ohio 0.00% New 77,700 $676K
Guggenheim Capital LLC 0.00% Reduce -68.0% 77,190 $672K
American International Group, Inc. 0.00% Reduce -0.9% 74,691 $651K
Gotham Asset Management 0.01% Add +19.2% 73,954 $644K
MetLife Investment Management, LLC 0.00% No change 71,570 $623K
SummerHaven Investment Management, LLC 0.38% Add +1.1% 69,539 $606K
Mariner, LLC 0.00% Add +155.4% 68,790 $599K
Louisiana State Employees Retirement System 0.01% Reduce -1.0% 68,000 $592K
Jane Street Group, LLC 0.00% Reduce -77.3% 67,482 $588K
Janus Henderson Group PLC 0.00% Add +0.0% 66,977 $583K
Tudor Investment Corporation 0.01% New 64,350 $560K
Oak Associates Ltd. 0.04% No change 61,384 $535K
Duality Advisers, LP 0.05% Reduce -9.1% 58,915 $513K
Verition Fund Management LLC 0.01% New 56,583 $493K
Old West Investment Management, LLC 0.25% Reduce -0.8% 56,457 $492K
Harbor Capital Advisors, Inc. 0.06% New 55,857 $487K
Sumitomo Mitsui Trust Group, Inc. 0.00% New 55,867 $487K
XTX Topco Ltd 0.07% Add +19.8% 55,658 $485K
Cipher Capital LP 0.21% Add +11.3% 52,901 $461K
New York State Teachers Retirement System 0.00% Add +36.2% 52,420 $457K
New Vernon Capital Holdings II LLC 0.24% No change 52,443 $457K
Dark Forest Capital Management LP 0.08% New 51,829 $451K
Wells Fargo & Company 0.00% Add +15.4% 51,290 $447K
Daiwa Securities Group Inc. 0.00% Add +1957.0% 50,870 $443K
Yousif Capital Management, LLC 0.00% Reduce -10.2% 50,649 $441K
Creative Planning 0.00% Reduce -45.2% 49,599 $432K
Comerica Bank 0.00% Reduce -10.7% 49,459 $431K
E Fund Management Co., Ltd. 0.03% Add +27.6% 48,097 $419K
Handelsbanken Fonder AB 0.00% No change 47,855 $417K
Intrinsic Value Partners, LLC 0.44% Reduce -3.5% 47,745 $416K
US Bancorp \de 0.00% Add +14.9% 45,770 $399K
Teachers Retirement System of the State of Kentucky 0.00% No change 44,349 $386K
Maryland State Retirement & Pension System 0.01% No change 49,935 $382K
Amalgamated Bank 0.00% Reduce -19.6% 43,209 $376K
Point72 (DIFC) Ltd 0.03% — 41,918 $365K
Wolverine Asset Management LLC 0.03% New 40,822 $356K
Inspire Investing, LLC 0.04% Add +20.7% 40,769 $355K
Prairiewood Capital, LLC 0.16% Reduce -4.3% 39,306 $342K
ProShare Advisors LLC 0.00% Add +8.1% 38,883 $339K
Arizona State Retirement System 0.00% Reduce -1.6% 38,617 $336K
Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% Add +15.6% 37,815 $329K
GRIMES & Co WEALTH MANAGEMENT, LLC 0.01% Reduce -3.5% 37,759 $329K
Jefferies Financial Group Inc. 0.01% Reduce -84.2% 36,750 $320K
Oregon Public Employees Retirement Fund 0.01% Reduce -8.4% 36,750 $320K
Broderick Brian C 0.07% No change 36,000 $314K
State of Wyoming 0.05% Add +215.7% 35,995 $314K
UniSuper Management Pty Ltd 0.00% New 35,307 $308K
Virtus Advisers, LLC 0.15% Add +16.8% 33,277 $290K
Shay Capital LLC 0.08% New 33,000 $287K
AXA S.A. 0.00% Reduce -70.6% 31,426 $274K
Teacher Retirement System of Texas 0.00% Reduce -3.7% 31,271 $272K
China Universal Asset Management Co., Ltd. 0.03% Add +66.6% 30,091 $262K
Sherbrooke Park Advisers LLC 0.05% New 30,074 $262K
Campbell & CO Investment Adviser LLC 0.02% New 29,708 $259K
Commonwealth of Pennsylvania Public School Empls Retrmt SYS 0.00% Add +0.1% 29,671 $258K
Brevan Howard Capital Management LP 0.02% Reduce -40.4% 28,974 $252K
Corton Capital Inc. 0.09% Reduce -19.3% 28,006 $244K
Gerber, LLC 0.20% No change 27,600 $240K
Robeco Institutional Asset Management B.V. 0.00% No change 27,336 $238K
Captrust Financial Advisors 0.00% Reduce -10.1% 26,750 $233K
Public Employees Retirement Association of Colorado 0.00% No change 24,883 $217K
Quent Capital, LLC 0.02% No change 24,500 $213K
EMC Capital Management 0.12% Reduce -44.8% 23,893 $208K
Mutual of America Capital Management LLC 0.00% Reduce -1.6% 23,670 $206K
Prelude Capital Management, LLC 0.01% New 22,399 $195K
Teza Capital Management LLC 0.03% New 21,733 $189K
Shell Asset Management Co. 0.01% Reduce -9.1% 28,496 $186K
Virtus Investment Advisers, LLC 0.14% No change 21,173 $184K
Amundi 0.00% Add +27.5% 24,089 $183K
Praxis Investment Management Inc. 0.01% No change 20,430 $178K
Tokio Marine Asset Management Co. Ltd. 0.01% Add +46.9% 18,800 $164K
Gallacher Capital Management LLC 0.08% New 17,383 $151K
Envestnet Asset Management Inc. 0.00% Add +54.4% 16,712 $146K
Pictet Asset Management Holding SA 0.00% No change 16,495 $144K
Bridgefront Capital, LLC 0.11% New 16,327 $142K
HSBC Holdings PLC 0.00% Reduce -45.4% 16,183 $141K
Raymond James Financial Services Advisors, Inc. 0.00% No change 15,330 $134K
Savant Capital, LLC 0.00% New 15,257 $133K
Lazard Asset Management LLC 0.00% Reduce -5.6% 14,542 $126K
O'shaughnessy Asset Management, LLC 0.00% Reduce -35.1% 14,438 $126K
Bank of Montreal 0.00% Add +4.9% 14,247 $125K
Xponance LLC 0.00% Add +0.5% 14,229 $124K
GW Henssler & Associates Ltd. 0.01% No change 13,821 $120K
Ameritas Investment Partners, Inc. 0.00% No change 13,773 $120K
Graham Capital Management, L.P. 0.01% New 13,537 $118K
Farallon Capital Management, L.L.C. 0.00% New 13,000 $113K
Wolverine Trading, LLC 0.00% New 12,998 $113K
Headlands Technologies LLC 0.03% New 12,585 $110K
Oracle Alpha Inc. 0.18% Reduce -22.2% 11,804 $103K
Vestcor Inc 0.00% No change 11,627 $101K
Hennion & Walsh Asset Management, Inc. 0.01% Reduce -0.8% 11,187 $97K
EntryPoint Capital, LLC 0.08% Add +517.4% 10,589 $92K
Cerity Partners LLC 0.00% New 10,485 $91K
Mackenzie Financial Corp. 0.00% No change 10,460 $91K
SG Americas Securities, LLC 0.00% New 10,492 $91K
Walleye Capital LLC 0.00% New 10,286 $90K
Royal Bank of Canada 0.00% Reduce -81.5% 8,315 $72K
Metropolitan Life Insurance Co 0.00% No change 7,769 $68K
Banque Cantonale Vaudoise 0.00% Add +10.1% 7,185 $63K
Quadrant Capital Group LLC 0.00% Reduce -34.7% 5,603 $49K
KBC Group NV 0.00% No change 4,768 $42K
Cwm, LLC 0.00% Add +370.2% 4,255 $37K
Osaic Holdings, Inc. 0.00% Reduce -51.3% 3,033 $26K
GAMMA Investing LLC 0.00% Add +66.3% 2,370 $21K
PNC Financial Services Group, Inc. 0.00% Reduce -56.0% 1,927 $17K
AlphaQuest LLC 0.00% New 1,624 $14K
Parallel Advisors, LLC 0.00% Reduce -15.9% 1,617 $14K
FNY Investment Advisers, LLC 0.01% New 1,700 $14K
Nisa Investment Advisors, LLC 0.00% Add +9.1% 1,500 $13K
Planning Capital Management Corp 0.01% Add +415.0% 1,303 $11K
Tower Research Capital LLC (TRC) 0.00% Reduce -77.0% 1,240 $11K
Signaturefd, LLC 0.00% Reduce -44.0% 1,210 $11K
Mitsubishi UFJ Asset Management Co., Ltd. 0.00% No change 1,043 $9K
Principal Securities, Inc. 0.00% Reduce -13.6% 998 $9K
Lindbrook Capital, LLC 0.00% Reduce -15.9% 966 $8K
Bessemer Group Inc. 0.00% Reduce -55.1% 299 $3K
Northwestern Mutual Wealth Management Co. 0.00% No change 290 $3K
Bell Investment Advisors, Inc 0.00% No change 216 $2K
City State Bank 0.00% No change 100 $1K
Farmers & Merchants Investments Inc. 0.00% No change 101 $880
JFS Wealth Advisors, LLC 0.00% No change 93 $811
Huntington National Bank 0.00% New 93 $810
First Pacific Financial 0.00% Add +27.1% 89 $776
Clean Yield Group 0.00% No change 85 $740
Farther Finance Advisors, LLC 0.00% No change 85 $732
MassMutual Private Wealth & Trust, FSB 0.00% Reduce -47.1% 74 $645
Parallax Volatility Advisers, L.P. 0.00% New 64 $557
UMB Bank, n.a. 0.00% New 63 $549
Versant Capital Management, Inc 0.00% No change 60 $523
Smartleaf Asset Management LLC 0.00% New 41 $353
Abound Wealth Management 0.00% No change 34 $297
Avior Wealth Management, LLC 0.00% New 26 $226
SJS Investment Consulting Inc. 0.00% No change 25 $218
DiNuzzo Private Wealth, Inc. 0.00% Add +5.9% 18 $157
Fifth Third Bancorp 0.00% Reduce -92.0% 17 $148
Global Retirement Partners, LLC 0.00% New 16 $139
Rothschild Investment LLC 0.00% New 15 $131
Parkside Financial Bank & Trust 0.00% New 15 $131
Allworth Financial LP 0.00% Reduce -92.6% 13 $114
Natixis 0.00% No change 2 $17
Covestor Ltd 0.00% Reduce -28.6% 10 $0

"% of holder's portfolio" is IRWD's weight in each manager's 13F, not the share of Ironwood Pharmaceuticals Inc. the manager owns.