Ironwood Pharmaceuticals Inc

IRWD

Exchange: Nasdaq
Industry: Pharmaceutical Preparations
SEC CIK: 0001446847

SEC filings (opens in a new tab)

In the last 90 days, Ironwood Pharmaceuticals Inc insiders filed 0 open-market purchases and 1 sale; 212 institutions reported holding it in 13F filings for Q2 2026, worth $675.8M in total; no superinvestor holds it.

Q1 2026 vs. Q4 2025

How the institutions holding Ironwood Pharmaceuticals Inc changed between Q4 2025 and Q1 2026.

All holders in Q1 2026 All holders in Q4 2025

13F holders of IRWD: Q4 2025 compared with Q1 2026
Measure	Q4 2025	Of which not filed for Q1 2026	Q1 2026	Change
Holders	199	4	227	+32
Shares	154.6M	16.0M	161.5M	+22.8M (+16.5%)
Value	$520.2M	$53.9M	$566.8M	+$100.5M (+21.5%)

4 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (57)

Institutions that held Ironwood Pharmaceuticals Inc at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to IRWD in Q1 2026
Institution	Shares	Value	% of portfolio
Vanguard Portfolio Management LLC	6,682,037	$23.5M	0.00%
Vanguard Capital Management LLC	6,097,454	$21.4M	0.00%
Pacer Advisors, Inc.	1,134,512	$3.98M	0.01%
Vanguard Fiduciary Trust Co	988,630	$3.47M	0.00%
Vanguard Global Advisers, LLC	591,489	$2.08M	0.00%
Wedge Capital Management L L P	540,492	$1.90M	0.04%
CWM Advisors, LLC	509,941	$1.79M	0.10%
BNP PARIBAS ASSET MANAGEMENT Holding S.A.	375,288	$1.32M	0.00%
CM Management, LLC	350,000	$1.23M	1.03%
Toroso Investments, LLC	304,475	$1.07M	0.00%
Segall Bryant & Hamill, LLC	278,201	$976.5K	0.01%
Globeflex Capital L P	259,809	$911.9K	0.14%
Martingale Asset Management L P	204,991	$719.5K	0.02%
Vident Advisory, LLC	184,337	$647.0K	0.01%
Fifth Third Bancorp	165,094	$579.5K	0.00%
Legato Capital Management LLC	156,059	$547.8K	0.05%
Fuller & Thaler Asset Management, Inc.	91,081	$319.7K	0.00%
Allspring Global Investments Holdings, LLC	79,193	$308.9K	0.00%
Ritholtz Wealth Management	87,535	$307.2K	0.01%
Bank of Montreal	62,750	$220.3K	0.00%
Schonfeld Strategic Advisors LLC	58,377	$204.9K	0.00%
National Bank of Canada	44,094	$154.8K	0.00%
Brighton Jones LLC	40,039	$140.5K	0.00%
nVerses Capital, LLC	32,554	$114.3K	0.10%
Graham Capital Management, L.P.	30,821	$108.2K	0.00%
E Fund Management Co., Ltd.	27,230	$95.6K	0.00%
Chicago Partners Investment Group LLC	18,483	$77.3K	0.00%
Simplex Trading, LLC	17,724	$62.2K	0.00%
Abacus Wealth Partners, LLC	17,531	$61.5K	0.01%
Virtu Financial LLC	16,960	$60.0K	0.00%
Scientech Research LLC	15,917	$55.9K	0.05%
Brevan Howard Capital Management LP	14,218	$49.9K	0.00%
Bull Harbor Capital LLC	13,721	$48.2K	0.01%
Nine Masts Capital Ltd	13,527	$47.5K	0.01%
Y-Intercept (Hong Kong) Ltd	13,470	$47.3K	0.00%
Axq Capital, LP	12,949	$45.5K	0.01%
Waddell & Associates, LLC	11,682	$41.0K	0.00%
Principal Financial Group Inc	11,375	$39.9K	0.00%
Allegiance Financial Group Advisory Services LLC	10,717	$37.6K	0.01%
Gotham Asset Management, LLC	10,657	$37.4K	0.00%
MAI Capital Management	6,564	$23.0K	0.00%
Financial Management Professionals, Inc.	6,508	$22.8K	0.00%
Owl Creek Wealth Partners LLC	6,195	$21.7K	0.01%
Private Wealth Asset Management, LLC	6,000	$21.1K	0.00%
Zurcher Kantonalbank (Zurich Cantonalbank)	3,079	$10.8K	0.00%
Rialto Wealth Management, LLC	2,174	$7.63K	0.00%
Carolina Wealth Advisors, LLC	1,492	$5.24K	0.00%
IAG Wealth Partners, LLC	1,000	$3.51K	0.00%
Quantbot Technologies LP	756	$2.65K	0.00%
Signaturefd, LLC	736	$2.58K	0.00%
Basecamp Wealth Advisors LLC	596	$2.09K	0.00%
Caitong International Asset Management Co., Ltd	522	$1.83K	0.00%
Intentional Wealth Strategies, LLC	349	$1.23K	0.00%
Advisory Services Network, LLC	235	$825	0.00%
Root Financial Partners, LLC	133	$467	0.00%
Frazier Financial Advisors, LLC	97	$341	0.00%
Keating Financial Advisory Services, Inc.	66	$232	0.00%

Sold out (25)

Institutions that held Ironwood Pharmaceuticals Inc at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of IRWD in Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Two Sigma Advisers, LP	3,140,100	$10.6M
Diadema Partners LP	683,611	$2.30M
Exome Asset Management LLC	648,532	$2.19M
Persistent Asset Partners Ltd	182,046	$613.5K
Prelude Capital Management, LLC	136,507	$460.0K
Exchange Traded Concepts, LLC	76,554	$258.0K
Balyasny Asset Management LLC	65,156	$219.6K
Panagora Asset Management Inc	54,408	$183.4K
Polymer Capital Management (US) LLC	48,747	$164.3K
XTX Topco Ltd	43,904	$148.0K
Jain Global LLC	30,009	$101.1K
Diversified Trust Co	12,574	$42.4K
Kaufman Rossin Wealth, LLC	10,516	$35.4K
Jump Financial, LLC	10,062	$33.9K
Fisher Asset Management, LLC	10,000	$33.7K
Harbor Capital Advisors, Inc.	7,902	$27.0K
GWM Advisors LLC	5,793	$19.5K
Amalgamated Bank	5,027	$17.0K
Bessemer Group Inc	932	$3.00K
Optima Capital LLC	778	$2.62K
Daiwa Securities Group Inc.	573	$2.00K
Flagship Harbor Advisors, LLC	300	$1.01K
Torren Management, LLC	72	$243
Garner Asset Management Corp	50	$169
Clearstead Advisors, LLC	41	$139

Not filed for Q1 2026 yet (4)

Institutions that held Ironwood Pharmaceuticals Inc at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding IRWD in Q4 2025 that haven't filed for Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Vanguard Group Inc	15,958,196	$53.8M
CIBC World Markets Corp	10,585	$35.7K
EMC Capital Management	8,386	$28.0K
Global Retirement Partners, LLC	2,713	$9.14K