Ironwood Pharmaceuticals, Inc. (IRWD)
Nasdaq: IRWD · Pharmaceutical Preparations · Boston, MA · filing with the SEC since 2008
Grade5.0
◀ Past 4.2● Present 5.0▶ Future 5.9
Who owns Ironwood Pharmaceuticals, Inc.
As filed with the SECHolders of 5% or more
5
Armistice Capital, LLC holds 8.43% of Class A common stock, $0.001 par value, as its SCHEDULE 13G/A filed Aug 14, 2026 says.
Directors and officers
15
report now, of 34 people on the record since 2010. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 5 named at left.
Holders of 5% or moreshare of the class, as filed
Armistice Capital, LLC
SCHEDULE 13G/A · filed Aug 14, 2026 · Class A common stock, $0.001 par value · 9.22% in May 15, 2026
Blackrock, Inc.
SCHEDULE 13G/A · filed Jul 28, 2026 · Class A Stock · 7.1% in Mar 7, 2025
Bank of America Corporation
SCHEDULE 13G/A · filed Apr 27, 2026 · Class A Common Stock · 7.4% in Nov 14, 2025
Alexander J. Denner
SCHEDULE 13D/A · filed Mar 19, 2026 · Class A Common Stock, $0.001 par value
State Street Corporation
SCHEDULE 13G · filed Aug 7, 2026 · COMMON STOCK · 2.2% in May 13, 2025
Renaissance Technologies LLC
SCHEDULE 13G/A · filed May 14, 2026 · Class A common stock, $0.001 par value · reported falling below 5%, from 5.37% in Nov 13, 2024
Barclays PLC
SCHEDULE 13G/A · filed Nov 12, 2025 · COMMON-STOCK · reported falling below 5%, from 6.88% in Aug 12, 2025
Pacer US Small Cap Cash Cows ETF
SCHEDULE 13G/A · filed May 2, 2025 · Class A Common Stock, Par Value $0.001 Per Share · reported falling below 5%, from 7.32% in May 2, 2025
The Vanguard Group
SCHEDULE 13G/A · filed Mar 27, 2026 · Common Stock · reported falling below 5%, from 10% in Jul 7, 2025
What IRWD reports owning in othersstakes of 5% or more, and other ties
4 subsidiaries in 3 countries, from the list filed with the 10-K filed Feb 26, 2026.
Insider tradesForm 4
18sales
0purchases
3sales on a scheduled plan
8people selling
$22.6Msold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window8 of 34 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Denner Alexander J | director | 2 | $20.5M | 0 | 0 | $0 |
| Silver Ronald | PFO & PAO | 4 | $800,000 | 2 | 0 | $0 |
| Mccourt Thomas A | Chief Executive Officer | 2 | $700,000 | 0 | 0 | $0 |
| Martini Gregory S. | Chief Financial Officer | 2 | $100,000 | 0 | 0 | $0 |
| Gaskins Tammi L | Chief Commercial Officer | 3 | $100,000 | 0 | 0 | $0 |
| John Minardo | Chief Legal Officer | 2 | $100,000 | 0 | 0 | $0 |
| Shetzline Michael | SVP, CMO, Head-Res&Drug | 2 | $100,000 | 0 | 0 | $0 |
| Mchugh Julie | director | 1 | $100,000 | 1 | 0 | $0 |