Ironwood Pharmaceuticals (IRWD)
Ironwood Pharmaceuticals on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as pharmaceutical preparations.
15.9M
Short interest
settlement 2026-10-15
8.0
Days to cover
+1.8 days vs prior
68.2%
Short share of volume
2026-11-02
1,050
Fails to deliver
settlement 2026-10-05
Mon 9 Nov
Next earnings
estimated date
$0
Insider flow, 90 days
0 buys, 0 sells
As of 2026-11-02.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in IRWD is 15,887,553 shares, down 2,841,433 shares over the last month. Over the last 48 readings it ranged from 4,702,015 shares (15 October 2025) to 18,728,986 shares (15 September 2026). At the reported average volume of 2.0M shares a day that is 8.0 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 15,887,553 | +2.0% | 1,987,411 | 7.99 |
| 2026-09-30 | 15,567,942 | -16.9% | 2,515,801 | 6.19 |
| 2026-09-15 | 18,728,986 | +6.1% | 1,428,561 | 13.11 |
| 2026-08-31 | 17,654,677 | -2.3% | 1,482,986 | 11.90 |
| 2026-08-14 | 18,066,382 | +9.2% | 2,804,675 | 6.44 |
| 2026-07-31 | 16,542,403 | -3.8% | 1,647,008 | 10.04 |
| 2026-07-15 | 17,191,892 | +5.9% | 2,720,002 | 6.32 |
| 2026-06-30 | 16,230,028 | +2.1% | 2,872,781 | 5.65 |
| 2026-06-15 | 15,898,991 | +5.9% | 1,942,894 | 8.18 |
| 2026-05-29 | 15,018,969 | -13.4% | 2,504,599 | 6.00 |
| 2026-05-15 | 17,334,279 | +0.4% | 3,002,395 | 5.77 |
| 2026-04-30 | 17,266,421 | -5.1% | 1,643,603 | 10.51 |
| 2026-04-15 | 18,191,102 | +1.6% | 1,783,648 | 10.20 |
| 2026-03-31 | 17,904,692 | +30.7% | 3,832,392 | 4.67 |
| 2026-03-13 | 13,703,587 | +6.1% | 2,059,699 | 6.65 |
| 2026-02-27 | 12,917,285 | +15.8% | 3,989,249 | 3.24 |
| 2026-02-13 | 11,159,224 | +17.9% | 2,470,961 | 4.52 |
| 2026-01-30 | 9,464,516 | +5.1% | 2,685,796 | 3.52 |
| 2026-01-15 | 9,007,479 | +10.6% | 12,387,357 | 1.00 |
| 2025-12-31 | 8,147,450 | +11.2% | 2,533,696 | 3.22 |
| 2025-12-15 | 7,329,764 | -1.8% | 1,931,733 | 3.79 |
| 2025-11-28 | 7,464,531 | +4.3% | 2,712,522 | 2.75 |
| 2025-11-14 | 7,154,955 | +50.2% | 4,831,690 | 1.48 |
| 2025-10-31 | 4,762,545 | +1.3% | 1,183,193 | 4.03 |
| 2025-10-15 | 4,702,015 | -9.0% | 1,306,552 | 3.60 |
| 2025-09-30 | 5,166,794 | -9.5% | 1,407,813 | 3.67 |
| 2025-09-15 | 5,707,969 | -5.9% | 1,321,706 | 4.32 |
| 2025-08-29 | 6,063,890 | -0.1% | 1,179,970 | 5.14 |
| 2025-08-15 | 6,071,719 | +12.8% | 1,659,705 | 3.66 |
| 2025-07-31 | 5,382,745 | -17.6% | 1,273,150 | 4.23 |
| 2025-07-15 | 6,528,581 | -12.7% | 1,244,758 | 5.24 |
| 2025-06-30 | 7,475,343 | -2.3% | 2,192,616 | 3.41 |
| 2025-06-13 | 7,651,319 | -7.0% | 3,251,604 | 2.35 |
| 2025-05-30 | 8,226,613 | -2.9% | 3,437,446 | 2.39 |
| 2025-05-15 | 8,467,972 | -3.8% | 2,355,998 | 3.59 |
| 2025-04-30 | 8,798,365 | -24.4% | 3,052,685 | 2.88 |
| 2025-04-15 | 11,642,399 | +3.5% | 5,168,443 | 2.25 |
| 2025-03-31 | 11,250,189 | -30.8% | 3,133,578 | 3.59 |
| 2025-03-14 | 16,247,025 | +34.8% | 2,596,539 | 6.26 |
| 2025-02-28 | 12,052,713 | +12.6% | 2,372,047 | 5.08 |
| 2025-02-14 | 10,702,566 | -0.5% | 6,733,370 | 1.59 |
| 2025-01-31 | 10,754,287 | +13.8% | 2,418,171 | 4.45 |
| 2025-01-15 | 9,448,965 | +2.5% | 2,106,858 | 4.48 |
| 2024-12-31 | 9,217,937 | -23.7% | 2,840,398 | 3.25 |
| 2024-12-13 | 12,084,477 | +7.7% | 1,915,222 | 6.31 |
| 2024-11-29 | 11,218,535 | +30.9% | 1,746,607 | 6.42 |
| 2024-11-15 | 8,567,112 | -21.8% | 1,584,280 | 5.41 |
| 2024-10-31 | 10,956,401 | -8.2% | 1,062,539 | 10.31 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 2 November 2026, the short share of IRWD volume is 68.2%, up 6.2 points over the last five sessions. Over the last 30 readings it ranged from 33.1% (27 October 2026) to 72.1% (8 October 2026). The latest reading is 12.3 points above the 30-session average of 55.9%, on 415K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-02 | 283K | 415K | 68.2% | 1,127 |
| 2026-10-30 | 439K | 671K | 65.5% | 2,680 |
| 2026-10-29 | 244K | 606K | 40.3% | 196 |
| 2026-10-28 | 419K | 678K | 61.8% | 31 |
| 2026-10-27 | 165K | 497K | 33.1% | 333 |
| 2026-10-26 | 280K | 452K | 62.0% | 444 |
| 2026-10-23 | 298K | 507K | 58.9% | 3,738 |
| 2026-10-22 | 181K | 337K | 53.5% | 50 |
| 2026-10-21 | 417K | 676K | 61.8% | 3,695 |
| 2026-10-20 | 388K | 732K | 53.0% | 29 |
| 2026-10-19 | 299K | 697K | 42.9% | 1,859 |
| 2026-10-16 | 689K | 1.1M | 64.0% | 9 |
| 2026-10-15 | 529K | 956K | 55.4% | 411 |
| 2026-10-14 | 258K | 522K | 49.5% | 5,460 |
| 2026-10-13 | 455K | 846K | 53.8% | 2,002 |
| 2026-10-12 | 192K | 384K | 49.9% | 347 |
| 2026-10-09 | 444K | 684K | 65.0% | 196 |
| 2026-10-08 | 572K | 793K | 72.1% | 330 |
| 2026-10-07 | 712K | 1.1M | 66.3% | 2,130 |
| 2026-10-06 | 381K | 721K | 52.8% | 4,708 |
| 2026-10-05 | 511K | 994K | 51.4% | 15 |
| 2026-10-02 | 561K | 958K | 58.5% | 931 |
| 2026-10-01 | 553K | 1.0M | 54.9% | 32,738 |
| 2026-09-30 | 209K | 450K | 46.5% | 708 |
| 2026-09-29 | 203K | 451K | 45.0% | 54 |
| 2026-09-28 | 254K | 465K | 54.6% | 448 |
| 2026-09-25 | 224K | 406K | 55.1% | 1,166 |
| 2026-09-24 | 386K | 595K | 64.8% | 57,597 |
| 2026-09-23 | 330K | 589K | 56.0% | 11 |
| 2026-09-22 | 346K | 579K | 59.7% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 5 October 2026, the fails-to-deliver balance in IRWD is 1,050 shares, down 167,990 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (17 July 2026) to 169,040 shares (21 September 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-10-05 | 1,050 | $3.64 | $4K |
| 2026-09-21 | 169,040 | $4.36 | $737K |
| 2026-09-18 | 3,363 | $4.23 | $14K |
| 2026-09-04 | 211 | $4.29 | $905 |
| 2026-08-24 | 97 | $4.29 | $416 |
| 2026-08-13 | 1 | $4.32 | $4 |
| 2026-08-05 | 15,792 | $4.31 | $68K |
| 2026-08-04 | 2,400 | $4.42 | $11K |
| 2026-07-17 | 1 | $3.87 | $4 |
| 2026-07-14 | 5 | $4.21 | $21 |
| 2026-07-06 | 4,000 | $4.33 | $17K |
| 2026-07-01 | 898 | $4.21 | $4K |
| 2026-06-30 | 50,143 | $4.30 | $216K |
| 2026-06-29 | 185 | $4.13 | $764 |
| 2026-06-26 | 178 | $3.84 | $684 |
| 2026-06-22 | 788 | $3.54 | $3K |
| 2026-06-18 | 208 | $3.52 | $732 |
| 2026-06-15 | 888 | $3.65 | $3K |
| 2026-06-11 | 8,172 | $3.35 | $27K |
| 2026-06-10 | 911 | $3.22 | $3K |
| 2026-06-08 | 1,458 | $3.31 | $5K |
| 2026-06-01 | 33 | $3.57 | $118 |
| 2026-05-28 | 88 | $3.71 | $326 |
| 2026-05-27 | 88 | $3.90 | $343 |
| 2026-05-22 | 52,100 | $3.85 | $201K |
| 2026-05-21 | 181 | $3.92 | $710 |
| 2026-05-19 | 2,543 | $3.50 | $9K |
| 2026-05-18 | 3 | $3.58 | $11 |
| 2026-04-22 | 74,314 | $4.07 | $302K |
| 2026-04-21 | 1,171 | $4.42 | $5K |
Insider trades
SEC Form 4, newest first. JSONNo open-market insider trades were reported for IRWD in the last 90 days. The most recent filings are listed below. Latest filing: DENNER ALEXANDER J (Director) on 2026-09-15.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-09-15 | DENNER ALEXANDER J | Director | Grant | 4K | $0.00 | $0 | 328K |
| 2026-07-20 | Silber Jeffrey | SVP, CMO, Head-Res&Drug | Grant | 137K | $0.00 | $0 | 137K |
| 2026-07-07 | Silver Ronald | PFO & PAO | Sell | 128K | $4.52 | $578K | 314K |
| 2026-06-16 | Moukheibir Catherine | Director | Grant | 63K | $0.00 | $0 | 181K |
| 2026-06-16 | McHugh Julie | Director | Grant | 63K | $0.00 | $0 | 272K |
| 2026-06-16 | McHugh Julie | Director | Sell | 22K | $3.73 | $80K | 251K |
| 2026-06-16 | DENNER ALEXANDER J | Director | Grant | 63K | $0.00 | $0 | 324K |
| 2026-06-16 | Duane Jon R | Director | Grant | 63K | $0.00 | $0 | 254K |
| 2026-06-16 | Currie Mark G | Director | Grant | 63K | $0.00 | $0 | 677K |
| 2026-06-16 | Kessler Marla L | Director | Grant | 63K | $0.00 | $0 | 229K |
| 2026-06-16 | Shepard Jay | Director | Grant | 63K | $0.00 | $0 | 235K |
| 2026-06-15 | DENNER ALEXANDER J | Director | Grant | 4K | $0.00 | $0 | 260K |
| 2026-05-19 | Silver Ronald | PFO & PAO | Grant | 25K | $0.00 | $0 | 442K |
| 2026-03-17 | DENNER ALEXANDER J | Director | Sell | 6K | $3.31 | $19K | 9.2M |
| 2026-03-17 | DENNER ALEXANDER J | Director | Sell | 6.7M | $3.05 | $20.5M | 9.2M |
| 2026-03-13 | DENNER ALEXANDER J | Director | Grant | 4K | $0.00 | $0 | 256K |
| 2026-03-10 | Shetzline Michael | SVP, CMO, Head-Res&Drug | Grant | 137K | $0.00 | $0 | 658K |
| 2026-03-10 | Silver Ronald | Principal Accounting Officer | Grant | 164K | $0.00 | $0 | 417K |
| 2026-03-10 | John Minardo | Chief Legal Officer | Grant | 137K | $0.00 | $0 | 500K |
| 2026-03-10 | Martini Gregory S. | Chief Financial Officer | Grant | 137K | $0.00 | $0 | 297K |
| 2026-03-10 | MCCOURT Thomas A | Chief Executive Officer | Grant | 410K | $0.00 | $0 | 1.9M |
| 2026-03-10 | Gaskins Tammi L | Chief Commercial Officer | Grant | 137K | $0.00 | $0 | 350K |
| 2026-02-24 | Martini Gregory S. | Chief Financial Officer | Sell | 11K | $3.66 | $42K | 161K |
| 2026-02-24 | John Minardo | Chief Legal Officer | Sell | 19K | $3.66 | $70K | 364K |
| 2026-02-24 | Shetzline Michael | SVP, CMO, Head-Res&Drug | Sell | 17K | $3.66 | $62K | 521K |
| 2026-02-24 | MCCOURT Thomas A | Chief Executive Officer | Sell | 104K | $3.66 | $379K | 1.5M |
| 2026-02-24 | Silver Ronald | Principal Accounting Officer | Sell | 13K | $3.66 | $46K | 253K |
| 2026-02-24 | Gaskins Tammi L | Chief Commercial Officer | Sell | 11K | $3.66 | $41K | 214K |
| 2026-02-23 | Martini Gregory S. | Chief Financial Officer | Sell | 10K | $3.81 | $40K | 172K |
| 2026-02-23 | John Minardo | Chief Legal Officer | Sell | 17K | $3.81 | $66K | 383K |
| 2026-02-23 | Shetzline Michael | SVP, CMO, Head-Res&Drug | Sell | 16K | $3.81 | $59K | 538K |
| 2026-02-23 | MCCOURT Thomas A | Chief Executive Officer | Sell | 95K | $3.81 | $361K | 1.6M |
| 2026-02-23 | Silver Ronald | Principal Accounting Officer | Sell | 12K | $3.81 | $44K | 265K |
| 2026-02-23 | Gaskins Tammi L | Chief Commercial Officer | Sell | 10K | $3.81 | $39K | 225K |
| 2026-01-05 | Silver Ronald | Principal Accounting Officer | Sell | 35K | $4.60 | $163K | 277K |
| 2025-12-15 | DENNER ALEXANDER J | Director, 10% owner | Grant | 4K | $0.00 | $0 | 252K |
| 2025-11-17 | Gaskins Tammi L | Chief Commercial Officer | Sell | 6K | $3.32 | $20K | 235K |
| 2025-09-15 | DENNER ALEXANDER J | Director, 10% owner | Grant | 12K | $0.00 | $0 | 248K |
| 2025-08-11 | John Minardo | Chief Legal Officer | Sell | 8K | $0.84 | $7K | 400K |
| 2025-08-11 | Silver Ronald | Principal Accounting Officer | Sell | 3K | $0.84 | $2K | 277K |
| 2025-08-11 | Martini Gregory S. | Chief Financial Officer | Sell | 1K | $0.84 | $1K | 183K |
| 2025-08-11 | Gaskins Tammi L | Chief Commercial Officer | Sell | 1K | $0.84 | $1K | 241K |
| 2025-06-13 | Sarissa Capital Management LP | TenPercentOwner | Grant | 24K | $0.00 | $0 | 236K |
| 2025-06-13 | DENNER ALEXANDER J | Director, 10% owner | Grant | 24K | $0.00 | $0 | 236K |
| 2025-06-10 | Kessler Marla L | Director | Grant | 45K | $0.00 | $0 | 166K |
| 2025-06-10 | Shepard Jay | Director | Grant | 45K | $0.00 | $0 | 172K |
| 2025-06-10 | Moukheibir Catherine | Director | Grant | 45K | $0.00 | $0 | 118K |
| 2025-06-10 | McHugh Julie | Director | Grant | 45K | $0.00 | $0 | 209K |
| 2025-06-10 | Duane Jon R | Director | Grant | 45K | $0.00 | $0 | 190K |
| 2025-06-10 | Dreyfus Andrew | Director | Grant | 45K | $0.00 | $0 | 228K |
| 2025-06-10 | DENNER ALEXANDER J | Director, 10% owner | Grant | 45K | $0.00 | $0 | 212K |
| 2025-06-10 | Currie Mark G | Director | Grant | 45K | $0.00 | $0 | 613K |
| 2025-05-20 | MCCOURT Thomas A | Chief Executive Officer | Grant | 540K | $0.00 | $0 | 1.7M |
| 2025-05-16 | Gaskins Tammi L | Chief Commercial Officer | Sell | 3K | $0.58 | $1K | 243K |
| 2025-05-16 | MCCOURT Thomas A | Chief Executive Officer | Sell | 13K | $0.58 | $8K | 1.1M |
| 2025-04-02 | Sarissa Capital Management LP | TenPercentOwner | Grant | 10K | $0.00 | $0 | 167K |
| 2025-02-10 | John Minardo | Chief Legal Officer | Grant | 122K | $0.00 | $0 | 447K |
| 2025-02-10 | John Minardo | Chief Legal Officer | Sell | 39K | $1.76 | $69K | 408K |
| 2025-02-10 | Martini Gregory S. | Chief Financial Officer | Sell | 12K | $1.76 | $21K | 184K |
| 2025-02-10 | Shetzline Michael | SVP, CMO, Head-Res&Drug | Sell | 41K | $1.76 | $73K | 554K |
| 2025-02-10 | Shetzline Michael | SVP, CMO, Head-Res&Drug | Grant | 133K | $0.00 | $0 | 595K |
| 2025-02-10 | MCCOURT Thomas A | Chief Executive Officer | Sell | 139K | $1.76 | $245K | 1.2M |
| 2025-02-10 | Silver Ronald | Principal Accounting Officer | Sell | 12K | $1.76 | $21K | 280K |
| 2025-01-27 | Martini Gregory S. | Chief Financial Officer | Grant | 111K | $0.00 | $0 | 196K |
| 2025-01-27 | Silver Ronald | Principal Accounting Officer | Grant | 133K | $0.00 | $0 | 292K |
| 2025-01-17 | MCCOURT Thomas A | Chief Executive Officer | Grant | 147K | $0.00 | $0 | 1.3M |
| 2025-01-17 | John Minardo | Chief Legal Officer | Grant | 40K | $0.00 | $0 | 325K |
| 2025-01-17 | Shetzline Michael | SVP, CMO, Head-Res&Drug | Grant | 48K | $0.00 | $0 | 462K |
| 2024-12-16 | Sarissa Capital Management LP | TenPercentOwner | Grant | 4K | $0.00 | $0 | 156K |
| 2024-11-18 | Emany Sravan Kumar | SVP, COO and CFO | Sell | 11K | $4.08 | $45K | 310K |
| 2024-11-18 | Davis Andrew | SVP, Chief Business Officer | Sell | 5K | $4.08 | $22K | 285K |
| 2024-09-16 | Sarissa Capital Management LP | TenPercentOwner | Grant | 3K | $0.00 | $0 | 152K |
| 2024-08-12 | Silver Ronald | Principal Accounting Officer | Sell | 3K | $4.27 | $13K | 158K |
| 2024-08-12 | John Minardo | Chief Legal Officer | Sell | 10K | $4.27 | $42K | 285K |
| 2024-06-18 | Kessler Marla L | Director | Grant | 24K | $0.00 | $0 | 121K |
| 2024-06-18 | Duane Jon R | Director | Grant | 24K | $0.00 | $0 | 145K |
| 2024-06-18 | Currie Mark G | Director | Grant | 24K | $0.00 | $0 | 568K |
| 2024-06-18 | McHugh Julie | Director | Grant | 24K | $0.00 | $0 | 164K |
| 2024-06-18 | Dreyfus Andrew | Director | Grant | 24K | $0.00 | $0 | 188K |
| 2024-06-18 | Shepard Jay | Director | Grant | 24K | $0.00 | $0 | 127K |
| 2024-06-18 | DENNER ALEXANDER J | Director,TenPercentOwner | Grant | 24K | $0.00 | $0 | 149K |
| 2024-06-18 | Moukheibir Catherine | Director | Grant | 24K | $0.00 | $0 | 73K |
| 2024-06-15 | Sarissa Capital Management LP | TenPercentOwner | Grant | 3K | $0.00 | $0 | 125K |
| 2024-06-10 | McHugh Julie | Director | Sell | 23K | $6.29 | $143K | 140K |
| 2024-06-07 | Moukheibir Catherine | Director | Sell | 36K | $6.61 | $235K | 49K |
| 2024-06-06 | Moukheibir Catherine | Director | Sell | 44K | $6.36 | $283K | 84K |
| 2024-05-20 | Shetzline Michael | CMO,SVP,Head-Res&Drug | Sell | 16K | $6.45 | $104K | 414K |
| 2024-05-20 | John Minardo | Chief Legal Officer | Sell | 17K | $6.45 | $112K | 295K |
| 2024-05-20 | Davis Andrew | SVP, Chief Business Officer | Sell | 23K | $6.45 | $147K | 288K |
| 2024-05-20 | MCCOURT Thomas A | Chief Executive Officer | Sell | 68K | $6.45 | $436K | 1.2M |
| 2024-05-16 | Emany Sravan Kumar | SVP, Chief Financial Officer | Tax withholding | 18K | $6.64 | $121K | 321K |
| 2024-03-15 | DENNER ALEXANDER J | Director,TenPercentOwner | Grant | 2K | $0.00 | $0 | 122K |
| 2024-03-08 | Emany Sravan Kumar | SVP, Chief Financial Officer | Exercise or conversion | 37K | $0.00 | $0 | 339K |
| 2024-03-08 | Shetzline Michael | CMO,SVP,Head-Res&Drug | Exercise or conversion | 35K | $0.00 | $0 | 430K |
| 2024-03-08 | John Minardo | Chief Legal Officer | Exercise or conversion | 33K | $0.00 | $0 | 312K |
| 2024-03-08 | Davis Andrew | SVP, Chief Business Officer | Exercise or conversion | 37K | $0.00 | $0 | 311K |
| 2024-03-08 | MCCOURT Thomas A | Chief Executive Officer | Exercise or conversion | 120K | $0.00 | $0 | 1.2M |
| 2024-03-06 | Duane Jon R | Director | Buy | 7K | $8.70 | $60K | 121K |
| 2024-03-05 | MCCOURT Thomas A | Chief Executive Officer | Grant | 265K | $0.00 | $0 | 1.1M |
| 2024-03-04 | Emany Sravan Kumar | SVP, Chief Financial Officer | Buy | 11K | $9.38 | $100K | 302K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON10 Form 144 notices on file for IRWD worth $2.5M at the prices reported; 1 in the last 90 days worth $377K. Latest: Shetzline Michael filed on 2026-09-23 to sell 83,306 shares ($377K) from 2026-09-24.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-09-23 | Shetzline MichaelFormer Officer | 83K | $377K | 0.050% | 2026-09-24 | E Trade Securities LLC |
| 2026-07-07 | RONALD SILVEROfficer | 128K | $560K | 0.078% | 2026-07-07 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-16 | JULIE MCHUGHDirector | 22K | $80K | 0.013% | 2026-06-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-02-20 | Martini Gregory S.Officer | 20K | $93K | 0.012% | 2026-02-23 | E Trade Securities LLC |
| 2026-02-20 | John MinardoOfficer | 34K | $155K | 0.021% | 2026-02-23 | E Trade Securities LLC |
| 2026-02-20 | Shetzline MichaelOfficer | 30K | $138K | 0.018% | 2026-02-23 | E Trade Securities LLC |
| 2026-02-20 | MCCOURT Thomas AOfficer, Director | 182K | $840K | 0.112% | 2026-02-23 | E Trade Securities LLC |
| 2026-02-20 | Gaskins Tammi LOfficer | 20K | $91K | 0.012% | 2026-02-23 | E Trade Securities LLC |
| 2026-01-05 | RONALD SILVEROfficer | 35K | $151K | 0.022% | 2026-01-05 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-11-14 | Gaskins Tammi LOfficer | 6K | $21K | 0.004% | 2025-11-17 | E Trade Securities LLC |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON6 holders report 5% or more of IRWD in their latest filing, 2 on Schedule 13D (active intent). The largest reported stake is Armistice Capital, LLC at 8.4% of the class (13,932,000 shares), filed 2026-08-14 for an event on 2026-06-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-10-28 | 13G/Ano. 2 | BANK OF AMERICA CORP /DE/parent holding company | 5.2M | 3.2% | 2026-09-30 |
| 2026-08-14 | 13G/Ano. 7 | Armistice Capital, LLCinvestment adviser, other entity | 13.9M | 8.4% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 7 | Steven Boydparent holding company, individual | 13.9M | 8.4% | 2026-06-30 |
| 2026-08-07 | 13G | STATE STREET CORPORATIONparent holding company | 8.8M | 5.4% | 2026-06-30 |
| 2026-07-28 | 13G/Ano. 6 | BlackRock, Inc.parent holding company | 13.4M | 8.1% | 2026-06-30 |
| 2026-05-14 | 13G/Ano. 1 | Renaissance Technologies Holdings Corporationparent holding company | 8.1M | 4.9% | 2026-03-31 |
| 2026-05-14 | 13G/Ano. 1 | Renaissance Technologies LLCinvestment adviser | 8.1M | 4.9% | 2026-03-31 |
| 2026-03-27 | 13G/Ano. 5 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-03-19 | 13D/Ano. 4 | Alexander J. Dennerindividual | 9.4M | 5.8% | 2026-03-17 |
| 2026-03-19 | 13D/Ano. 4 | Sarissa Capital Management LPpartnership | 9.2M | 5.6% | 2026-03-17 |
| 2025-11-12 | 13G/Ano. 1 | Barclays PLCparent holding company | 3.2M | 1.9% | 2025-09-30 |
13F holders
Tracked managers holding IRWD at their latest 13F. JSON5 of the 30 tracked managers held IRWD at their latest 13F, $82.7M in total at quarter-end prices. Renaissance Technologies is the largest at $33.7M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 3 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Renaissance Technologies | 2026-06-30 | 8.0M | $33.7M | 0.05% | -68K |
| AQR Capital Management | 2026-06-30 | 6.5M | $27.2M | 0.01% | -1.1M |
| Two Sigma Investments | 2026-06-30 | 4.6M | $19.2M | 0.01% | -1.3M |
| Citadel Advisors | 2026-06-30 | 502K | $2.1M | 0.00% | +384K |
| D. E. Shaw & Co. | 2026-06-30 | 123K | $517K | 0.00% | +75K |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
What this page is
Ironwood Pharmaceuticals in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Ironwood Pharmaceuticals (IRWD), SEC CIK 1446847, listed on Nasdaq, classified by the SEC as pharmaceutical preparations. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-02.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-10-05.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-09-23.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-10-28.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-06.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-09-15.JSON and CSV
- Company record
- EDGAR filing index for CIK 1446847Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
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Datasets
Frequently Asked Questions
How much of IRWD is sold short?
15,887,553 shares were held short at the 2026-10-15 settlement, 8.0 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is IRWD's daily short volume?
On 2026-11-02, 282,836 of the 414,729 IRWD shares reported to FINRA were sold short, 68.2% of the day's reported volume. Short volume is a flow for one day, not a position.
Does IRWD have fails to deliver?
The SEC's latest file shows 1,050 IRWD shares failed to deliver at settlement 2026-10-05. Fails are reported per settlement date and published twice a month with a lag.
Are IRWD insiders buying or selling?
No open-market insider trades were reported for IRWD in the last 90 days. The most recent filings are listed below. Latest filing: DENNER ALEXANDER J (Director) on 2026-09-15.
Have IRWD insiders filed to sell?
10 Form 144 notices on file for IRWD worth $2.5M at the prices reported; 1 in the last 90 days worth $377K. Latest: Shetzline Michael filed on 2026-09-23 to sell 83,306 shares ($377K) from 2026-09-24.
Who owns 5% or more of IRWD?
6 holders report 5% or more of IRWD in their latest filing, 2 on Schedule 13D (active intent). The largest reported stake is Armistice Capital, LLC at 8.4% of the class (13,932,000 shares), filed 2026-08-14 for an event on 2026-06-30.
Which tracked 13F managers own IRWD?
5 of the 30 tracked 13F managers held IRWD shares at their latest filing, $82.7M in all. The largest: Renaissance Technologies (8.0M shares, $33.7M), Cliff Asness's AQR Capital Management (6.5M shares, $27.2M), Two Sigma Investments (4.6M shares, $19.2M), Ken Griffin's Citadel Advisors (502K shares, $2.1M), D. E. Shaw & Co. (123K shares, $517K).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.