Eton Pharmaceuticals (ETON)
Eton 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.
1.9M
Short interest
settlement 2026-10-15
3.3
Days to cover
+0.4 days vs prior
68.2%
Short share of volume
2026-11-02
816
Fails to deliver
settlement 2026-08-24
Thu 5 Nov
Next earnings
estimated date
-$10.9M
Insider flow, 90 days
0 buys, 9 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 ETON is 1,943,339 shares, up 400,357 shares over the last month. Over the last 48 readings it ranged from 191,937 shares (31 October 2024) to 3,690,211 shares (29 August 2025). At the reported average volume of 588K shares a day that is 3.3 days to cover.
Embed this chart.The embed keeps its attribution line.
<iframe src="https://xoomar.com/embed/stocks/eton" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 1,943,339 | +6.0% | 588,430 | 3.30 |
| 2026-09-30 | 1,834,090 | +18.9% | 624,706 | 2.94 |
| 2026-09-15 | 1,542,982 | +14.5% | 438,622 | 3.52 |
| 2026-08-31 | 1,347,971 | -5.6% | 681,758 | 1.98 |
| 2026-08-14 | 1,427,797 | +8.7% | 637,002 | 2.24 |
| 2026-07-31 | 1,313,359 | +7.1% | 633,128 | 2.07 |
| 2026-07-15 | 1,226,286 | -15.4% | 405,195 | 3.03 |
| 2026-06-30 | 1,449,499 | +1.7% | 487,785 | 2.97 |
| 2026-06-15 | 1,425,624 | +13.0% | 345,181 | 4.13 |
| 2026-05-29 | 1,261,144 | -18.6% | 449,611 | 2.80 |
| 2026-05-15 | 1,548,779 | -5.2% | 478,036 | 3.24 |
| 2026-04-30 | 1,634,204 | -8.9% | 298,988 | 5.47 |
| 2026-04-15 | 1,793,010 | -5.4% | 423,286 | 4.24 |
| 2026-03-31 | 1,894,534 | -0.1% | 526,080 | 3.60 |
| 2026-03-13 | 1,897,395 | -14.4% | 274,076 | 6.92 |
| 2026-02-27 | 2,217,404 | +5.2% | 317,855 | 6.98 |
| 2026-02-13 | 2,107,301 | +5.6% | 266,671 | 7.90 |
| 2026-01-30 | 1,995,226 | -1.6% | 182,155 | 10.95 |
| 2026-01-15 | 2,027,568 | -6.3% | 257,363 | 7.88 |
| 2025-12-31 | 2,162,683 | -11.8% | 181,264 | 11.93 |
| 2025-12-15 | 2,451,244 | -1.9% | 271,067 | 9.04 |
| 2025-11-28 | 2,497,516 | -10.2% | 291,598 | 8.56 |
| 2025-11-14 | 2,782,591 | -4.7% | 356,986 | 7.79 |
| 2025-10-31 | 2,920,610 | -3.3% | 195,487 | 14.94 |
| 2025-10-15 | 3,020,407 | -10.4% | 316,594 | 9.54 |
| 2025-09-30 | 3,372,905 | -7.5% | 414,212 | 8.14 |
| 2025-09-15 | 3,647,734 | -1.1% | 203,765 | 17.90 |
| 2025-08-29 | 3,690,211 | +3.5% | 237,764 | 15.52 |
| 2025-08-15 | 3,564,101 | +7.4% | 399,237 | 8.93 |
| 2025-07-31 | 3,319,101 | +8.9% | 391,506 | 8.48 |
| 2025-07-15 | 3,049,043 | +29.0% | 493,863 | 6.17 |
| 2025-06-30 | 2,363,372 | +111.0% | 776,420 | 3.04 |
| 2025-06-13 | 1,120,282 | +36.0% | 500,498 | 2.24 |
| 2025-05-30 | 823,782 | +39.7% | 401,118 | 2.05 |
| 2025-05-15 | 589,513 | -16.1% | 303,280 | 1.94 |
| 2025-04-30 | 702,458 | +74.5% | 230,751 | 3.04 |
| 2025-04-15 | 402,632 | +17.1% | 263,295 | 1.53 |
| 2025-03-31 | 343,924 | +46.0% | 259,476 | 1.33 |
| 2025-03-14 | 235,628 | -18.6% | 181,670 | 1.30 |
| 2025-02-28 | 289,418 | -18.0% | 313,046 | 1.00 |
| 2025-02-14 | 352,984 | +3.5% | 255,987 | 1.38 |
| 2025-01-31 | 340,932 | +4.0% | 383,373 | 1.00 |
| 2025-01-15 | 327,659 | +33.7% | 331,046 | 1.00 |
| 2024-12-31 | 245,114 | -11.8% | 147,987 | 1.66 |
| 2024-12-13 | 278,000 | +1.5% | 204,643 | 1.36 |
| 2024-11-29 | 273,898 | +32.6% | 294,566 | 1.00 |
| 2024-11-15 | 206,511 | +7.6% | 261,465 | 1.00 |
| 2024-10-31 | 191,937 | -6.2% | 144,638 | 1.33 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 2 November 2026, the short share of ETON volume is 68.2%, down 10.6 points over the last five sessions. Over the last 30 readings it ranged from 50.7% (30 October 2026) to 84.8% (29 September 2026). The latest reading is in line with the 30-session average of 67.5%, on 249K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-02 | 170K | 249K | 68.2% | 81 |
| 2026-10-30 | 75K | 149K | 50.7% | 0 |
| 2026-10-29 | 96K | 134K | 72.0% | 0 |
| 2026-10-28 | 71K | 99K | 71.7% | 0 |
| 2026-10-27 | 85K | 140K | 60.8% | 0 |
| 2026-10-26 | 138K | 176K | 78.8% | 0 |
| 2026-10-23 | 102K | 135K | 75.6% | 0 |
| 2026-10-22 | 146K | 191K | 76.3% | 0 |
| 2026-10-21 | 104K | 147K | 70.6% | 0 |
| 2026-10-20 | 75K | 113K | 66.1% | 0 |
| 2026-10-19 | 85K | 159K | 53.2% | 700 |
| 2026-10-16 | 112K | 189K | 59.4% | 0 |
| 2026-10-15 | 135K | 195K | 69.1% | 0 |
| 2026-10-14 | 114K | 172K | 66.3% | 18 |
| 2026-10-13 | 112K | 210K | 53.4% | 0 |
| 2026-10-12 | 153K | 209K | 73.4% | 0 |
| 2026-10-09 | 85K | 164K | 51.8% | 0 |
| 2026-10-08 | 125K | 179K | 69.8% | 0 |
| 2026-10-07 | 136K | 191K | 71.2% | 0 |
| 2026-10-06 | 137K | 195K | 70.1% | 0 |
| 2026-10-05 | 114K | 151K | 75.1% | 0 |
| 2026-10-02 | 187K | 235K | 79.7% | 0 |
| 2026-10-01 | 418K | 605K | 69.2% | 20,350 |
| 2026-09-30 | 487K | 838K | 58.1% | 27,249 |
| 2026-09-29 | 289K | 341K | 84.8% | 0 |
| 2026-09-28 | 106K | 156K | 68.1% | 0 |
| 2026-09-25 | 156K | 245K | 63.5% | 100 |
| 2026-09-24 | 213K | 305K | 69.8% | 0 |
| 2026-09-23 | 102K | 179K | 57.2% | 0 |
| 2026-09-22 | 117K | 163K | 71.5% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 24 August 2026, the fails-to-deliver balance in ETON is 816 shares, down 10,045 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (23 March 2026) to 48,973 shares (18 May 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-08-24 | 816 | $63.47 | $52K |
| 2026-08-19 | 10,861 | $63.43 | $689K |
| 2026-08-12 | 2,428 | $42.05 | $102K |
| 2026-08-04 | 1,844 | $45.14 | $83K |
| 2026-07-24 | 8 | $44.14 | $353 |
| 2026-07-23 | 8 | $43.58 | $349 |
| 2026-07-22 | 8 | $43.20 | $346 |
| 2026-07-20 | 903 | $42.32 | $38K |
| 2026-07-17 | 23 | $37.19 | $855 |
| 2026-07-14 | 51 | $37.34 | $2K |
| 2026-07-09 | 1,293 | $36.17 | $47K |
| 2026-07-08 | 660 | $37.74 | $25K |
| 2026-06-18 | 198 | $32.76 | $6K |
| 2026-05-21 | 15,634 | $34.45 | $539K |
| 2026-05-20 | 6,538 | $32.89 | $215K |
| 2026-05-18 | 48,973 | $30.26 | $1.5M |
| 2026-05-15 | 18,422 | $29.96 | $552K |
| 2026-05-07 | 338 | $30.15 | $10K |
| 2026-05-06 | 15,821 | $30.38 | $481K |
| 2026-05-05 | 3,104 | $30.16 | $94K |
| 2026-05-04 | 8,472 | $28.90 | $245K |
| 2026-04-23 | 633 | $23.61 | $15K |
| 2026-03-27 | 8,162 | $23.45 | $191K |
| 2026-03-23 | 1 | $22.32 | $22 |
| 2026-03-20 | 15,987 | $20.77 | $332K |
| 2026-03-19 | 1,968 | $19.02 | $37K |
| 2026-03-17 | 1,858 | $19.01 | $35K |
| 2026-03-16 | 7,213 | $18.93 | $137K |
| 2026-03-13 | 279 | $19.02 | $5K |
| 2026-03-12 | 9,495 | $18.09 | $172K |
Insider trades
SEC Form 4, newest first. JSONInsiders at ETON reported 9 open-market sells worth $10.9M in the last 90 days and no open-market buys. Latest filing: Krempa David (Chief Business Officer) on 2026-10-06.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-10-06 | Krempa David | Chief Business Officer | Sell | 4K | $55.07 | $229K | 43K |
| 2026-10-02 | Krempa David | Chief Business Officer | Exercise or conversion | 11K | price not stated in the filing | not stated | 48K |
| 2026-08-28 | MAIER PAUL V | Director | Sell | 128 | $61.77 | $8K | 60K |
| 2026-08-28 | MAIER PAUL V | Director | Sell | 13K | $60.21 | $812K | 60K |
| 2026-08-28 | MAIER PAUL V | Director | Sell | 36K | $58.64 | $2.1M | 73K |
| 2026-08-28 | MAIER PAUL V | Director | Exercise or conversion | 50K | $3.78 | $189K | 110K |
| 2026-08-24 | Krempa David | Chief Business Officer | Sell | 25K | $65.07 | $1.6M | 37K |
| 2026-08-24 | Krempa David | Chief Business Officer | Exercise or conversion | 25K | $7.31 | $183K | 62K |
| 2026-08-20 | BRYNJELSEN SEAN | President & CEO | Sell | 7K | $62.12 | $456K | 961K |
| 2026-08-20 | BRYNJELSEN SEAN | President & CEO | Sell | 36K | $61.11 | $2.2M | 969K |
| 2026-08-20 | BRYNJELSEN SEAN | President & CEO | Sell | 47K | $60.17 | $2.8M | 1.0M |
| 2026-08-19 | BRYNJELSEN SEAN | President & CEO | Sell | 9K | $62.65 | $562K | 1.1M |
| 2026-07-14 | BRYNJELSEN SEAN | President & CEO | Exercise or conversion | 200K | $1.37 | $274K | 1.1M |
| 2026-07-14 | Opaleye Management Inc. | 10% owner | Sell | 13K | $37.54 | $500K | 40K |
| 2026-07-14 | Opaleye Management Inc. | 10% owner | Sell | 15K | $37.54 | $563K | 2.7M |
| 2026-07-12 | Krempa David | Chief Business Officer | Exercise or conversion | 10K | price not stated in the filing | not stated | 37K |
| 2026-07-12 | BRYNJELSEN SEAN | President & CEO | Exercise or conversion | 28K | price not stated in the filing | not stated | 861K |
| 2026-07-07 | Opaleye Management Inc. | 10% owner | Sell | 7K | $38.37 | $257K | 53K |
| 2026-07-07 | Opaleye Management Inc. | 10% owner | Sell | 20K | $38.37 | $767K | 2.7M |
| 2026-07-06 | Opaleye Management Inc. | 10% owner | Sell | 10K | $38.00 | $380K | 2.7M |
| 2026-07-02 | Opaleye Management Inc. | 10% owner | Sell | 25K | $37.39 | $935K | 60K |
| 2026-07-02 | Opaleye Management Inc. | 10% owner | Sell | 65K | $37.39 | $2.4M | 2.7M |
| 2026-06-17 | Adams Jennifer McKie | Director | Sell | 50K | $32.48 | $1.6M | 0 |
| 2026-06-17 | Adams Jennifer McKie | Director | Exercise or conversion | 50K | $3.78 | $189K | 50K |
| 2026-05-28 | BRYNJELSEN SEAN | President & CEO | Sell | 148 | $32.67 | $5K | 834K |
| 2026-05-28 | BRYNJELSEN SEAN | President & CEO | Sell | 120K | $31.88 | $3.8M | 834K |
| 2026-05-27 | Krempa David | Chief Business Officer | Sell | 20K | $31.47 | $619K | 25K |
| 2026-05-27 | Krempa David | Chief Business Officer | Exercise or conversion | 7K | $3.58 | $26K | 45K |
| 2026-05-27 | Krempa David | Chief Business Officer | Exercise or conversion | 12K | $1.37 | $17K | 38K |
| 2026-05-26 | Krempa David | Chief Business Officer | Sell | 38K | $31.49 | $1.2M | 25K |
| 2026-05-26 | Krempa David | Chief Business Officer | Exercise or conversion | 13K | $1.37 | $17K | 63K |
| 2026-05-26 | Krempa David | Chief Business Officer | Exercise or conversion | 25K | $1.38 | $35K | 50K |
| 2026-05-22 | Krempa David | Chief Business Officer | Sell | 519 | $35.00 | $18K | 25K |
| 2026-05-22 | Krempa David | Chief Business Officer | Sell | 9K | $33.88 | $316K | 26K |
| 2026-05-22 | Krempa David | Chief Business Officer | Sell | 33K | $33.22 | $1.1M | 35K |
| 2026-05-22 | Krempa David | Chief Business Officer | Exercise or conversion | 31K | $3.58 | $110K | 68K |
| 2026-04-21 | RIEDEL NORBERT G | Director | Exercise or conversion | 20K | $8.61 | $169K | 67K |
| 2026-04-21 | RIEDEL NORBERT G | Director | Exercise or conversion | 13K | $7.31 | $91K | 48K |
| 2026-02-03 | RIEDEL NORBERT G | Director | Exercise (in or at the money) | 30K | $4.42 | $133K | 35K |
| 2026-01-14 | Krempa David | Chief Business Officer | Tax withholding | 2K | $15.62 | $30K | 630K |
| 2026-01-14 | Gruber James R. | Chief Financial Officer | Tax withholding | 2K | $15.47 | $35K | 213K |
| 2026-01-01 | BRYNJELSEN SEAN | President & CEO | Tax withholding | 5K | $15.39 | $77K | 2.9M |
| 2025-12-12 | Krempa David | Chief Business Officer | Tax withholding | 6K | $17.00 | $106K | 632K |
| 2025-12-12 | Gruber James R. | Chief Financial Officer | Tax withholding | 5K | $16.99 | $77K | 216K |
| 2025-12-12 | Erdogan-Trinkaus Ipek | Chief Commercial Officer | Tax withholding | 85 | $16.90 | $1K | 2K |
| 2025-12-12 | BRYNJELSEN SEAN | President & CEO | Tax withholding | 7K | $16.83 | $113K | 2.9M |
| 2025-08-20 | Gruber James R. | Chief Financial Officer | Sell | 3K | $16.02 | $42K | 205K |
| 2025-08-19 | Gruber James R. | Chief Financial Officer | Sell | 39K | $16.16 | $632K | 205K |
| 2025-06-16 | Krempa David | Chief Business Officer | Sell | 10K | $14.73 | $151K | 613K |
| 2025-06-13 | Krempa David | Chief Business Officer | Sell | 7K | $14.77 | $100K | 623K |
| 2025-06-12 | Krempa David | Chief Business Officer | Sell | 17K | $14.92 | $253K | 630K |
| 2025-06-10 | Opaleye Management Inc. | 10% owner | Buy | 3K | $15.82 | $46K | 85K |
| 2025-06-10 | Opaleye Management Inc. | 10% owner | Buy | 5K | $15.82 | $79K | 2.8M |
| 2025-06-05 | BRYNJELSEN SEAN | President & CEO | Sell | 70K | $16.81 | $1.2M | 2.9M |
| 2025-06-04 | BRYNJELSEN SEAN | President & CEO | Sell | 70K | $17.00 | $1.2M | 2.9M |
| 2025-06-03 | BRYNJELSEN SEAN | President & CEO | Sell | 400 | $19.02 | $8K | 3.0M |
| 2025-06-03 | BRYNJELSEN SEAN | President & CEO | Sell | 61K | $17.38 | $1.1M | 3.0M |
| 2025-06-03 | BRYNJELSEN SEAN | President & CEO | Sell | 9K | $18.38 | $159K | 3.0M |
| 2025-01-03 | RIEDEL NORBERT G | Director | Exercise or conversion | 50K | $3.78 | $189K | 137K |
| 2025-01-03 | RIEDEL NORBERT G | Director | Exercise or conversion | 27K | $3.58 | $98K | 87K |
| 2025-01-03 | RIEDEL NORBERT G | Director | Exercise or conversion | 25K | $3.47 | $87K | 162K |
| 2024-10-23 | Opaleye Management Inc. | TenPercentOwner | Buy | 10K | $7.98 | $80K | 2.8M |
| 2024-10-08 | Opaleye Management Inc. | TenPercentOwner | Buy | 30K | $7.03 | $211K | 2.8M |
| 2024-10-08 | Opaleye Management Inc. | TenPercentOwner | Buy | 4K | $7.03 | $28K | 82K |
| 2024-10-07 | Opaleye Management Inc. | TenPercentOwner | Buy | 10K | $7.22 | $72K | 2.7M |
| 2024-10-07 | Opaleye Management Inc. | TenPercentOwner | Buy | 1K | $7.22 | $9K | 78K |
| 2024-10-04 | Opaleye Management Inc. | TenPercentOwner | Buy | 15K | $6.77 | $102K | 2.7M |
| 2024-10-04 | Opaleye Management Inc. | TenPercentOwner | Buy | 2K | $6.77 | $13K | 77K |
| 2024-09-11 | Opaleye Management Inc. | TenPercentOwner | Buy | 45K | $4.75 | $214K | 2.7M |
| 2024-09-11 | Opaleye Management Inc. | TenPercentOwner | Buy | 5K | $4.75 | $24K | 75K |
| 2024-09-10 | Opaleye Management Inc. | TenPercentOwner | Buy | 8K | $4.65 | $35K | 70K |
| 2024-09-10 | Opaleye Management Inc. | TenPercentOwner | Buy | 50K | $4.65 | $233K | 2.7M |
| 2022-09-22 | BRYNJELSEN SEAN | Chief Executive Officer | Buy | 10K | $2.10 | $21K | 1.0M |
| 2021-11-17 | Opaleye Management Inc. | TenPercentOwner | Sell | 25K | $4.67 | $117K | 2.4M |
| 2021-11-16 | Opaleye Management Inc. | TenPercentOwner | Sell | 12K | $4.86 | $56K | 2.4M |
| 2021-11-16 | Opaleye Management Inc. | TenPercentOwner | Sell | 938 | $4.86 | $5K | 85K |
| 2021-11-15 | Opaleye Management Inc. | TenPercentOwner | Sell | 500 | $4.80 | $2K | 86K |
| 2021-11-15 | Opaleye Management Inc. | TenPercentOwner | Sell | 3K | $4.80 | $12K | 2.4M |
| 2021-11-08 | Opaleye Management Inc. | TenPercentOwner | Sell | 3K | $6.10 | $16K | 86K |
| 2021-11-08 | Opaleye Management Inc. | TenPercentOwner | Sell | 50K | $6.10 | $305K | 2.4M |
| 2021-11-05 | Opaleye Management Inc. | TenPercentOwner | Sell | 159K | $6.30 | $1.0M | 2.5M |
| 2021-11-05 | Opaleye Management Inc. | TenPercentOwner | Sell | 8K | $6.30 | $53K | 89K |
| 2021-11-04 | Opaleye Management Inc. | TenPercentOwner | Sell | 82K | $6.44 | $526K | 2.6M |
| 2021-11-04 | Opaleye Management Inc. | TenPercentOwner | Sell | 4K | $6.44 | $26K | 98K |
| 2021-11-03 | Opaleye Management Inc. | TenPercentOwner | Sell | 110K | $6.53 | $718K | 2.7M |
| 2021-11-03 | Opaleye Management Inc. | TenPercentOwner | Sell | 7K | $6.53 | $42K | 102K |
| 2021-10-12 | Opaleye Management Inc. | TenPercentOwner | Sell | 5K | $5.06 | $24K | 117K |
| 2021-10-12 | Opaleye Management Inc. | TenPercentOwner | Sell | 83K | $5.06 | $417K | 2.8M |
| 2021-10-11 | Opaleye Management Inc. | TenPercentOwner | Sell | 2K | $5.01 | $8K | 113K |
| 2021-10-11 | Opaleye Management Inc. | TenPercentOwner | Sell | 33K | $5.01 | $163K | 2.9M |
| 2021-10-08 | Opaleye Management Inc. | TenPercentOwner | Sell | 3K | $5.00 | $13K | 114K |
| 2021-10-08 | Opaleye Management Inc. | TenPercentOwner | Sell | 41K | $5.00 | $205K | 2.9M |
| 2021-08-20 | BRYNJELSEN SEAN | President & CEO | Buy | 10K | $4.32 | $43K | 1.0M |
| 2021-08-20 | Troutman William Wilson | CFO, Treasurer & Secretary | Buy | 5K | $4.43 | $22K | 23K |
| 2021-08-06 | Opaleye Management Inc. | TenPercentOwner | Sell | 330K | $5.84 | $1.9M | 3.0M |
| 2021-08-06 | Opaleye Management Inc. | TenPercentOwner | Sell | 15K | $5.84 | $88K | 117K |
| 2021-08-05 | Opaleye Management Inc. | TenPercentOwner | Sell | 6K | $5.85 | $32K | 132K |
| 2021-08-05 | Opaleye Management Inc. | TenPercentOwner | Sell | 150K | $5.85 | $878K | 3.3M |
| 2021-08-04 | Opaleye Management Inc. | TenPercentOwner | Sell | 100K | $5.75 | $575K | 3.5M |
| 2021-08-04 | Opaleye Management Inc. | TenPercentOwner | Sell | 4K | $5.75 | $23K | 138K |
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. JSON19 Form 144 notices on file for ETON worth $37.8M at the prices reported; 5 in the last 90 days worth $17.5M. Latest: Krempa David filed on 2026-10-06 to sell 4,166 shares ($229K) from 2026-10-06.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-10-06 | Krempa DavidOfficer | 4K | $229K | 0.015% | 2026-10-06 | Raymond James & Associates Inc. |
| 2026-08-28 | MAIER PAUL VDirector | 50K | $3.0M | 0.175% | 2026-08-28 | Raymond James and Associates inc. |
| 2026-08-24 | Krempa DavidOfficer | 25K | $1.6M | 0.087% | 2026-08-24 | Raymond James and Associates |
| 2026-08-20 | BRYNJELSEN SEANOfficer, Director | 100K | $6.3M | 0.350% | 2026-08-19 | Raymond James and Associates |
| 2026-08-19 | BRYNJELSEN SEANDirector, 10% Stockholder | 100K | $6.3M | 0.350% | 2026-08-19 | Raymond James and Associates Inc. |
| 2026-06-26 | Gruber James R.Officer | 252K | $9.0M | 0.919% | 2026-06-26 | Raymond James & Associates |
| 2026-06-25 | Gruber James R.Officer | 25K | $875K | 0.091% | 2026-06-25 | Raymond James & Associates |
| 2026-06-23 | Gruber James R.Officer | 25K | $831K | 0.091% | 2026-06-23 | Raymond James & Associates |
| 2026-06-17 | Adams Jennifer McKieDirector | 50K | $1.6M | 0.183% | 2026-06-17 | Raymond James & Associates |
| 2026-06-02 | Gruber James R.Officer | 3K | $84K | 0.011% | 2026-06-02 | Raymond James & Associates |
| 2026-05-28 | BRYNJELSEN SEANDirector | 120K | $3.9M | 0.438% | 2026-05-28 | The Charles Schwab Corporation |
| 2026-05-22 | Krempa DavidOfficer | 100K | $3.5M | 0.365% | 2026-05-22 | Raymond James & Associates, Inc. |
| 2026-01-14 | Krempa DavidOfficer | 2K | $30K | 0.007% | 2026-01-14 | Raymond James & Associates |
| 2026-01-14 | Gruber James R.Officer | 2K | $35K | 0.009% | 2026-01-14 | Raymond James & Associates |
| 2026-01-14 | BRYNJELSEN SEANOfficer, Director, 10% Stockholder | 5K | $77K | 0.019% | 2026-01-14 | RAYMOND JAMES & ASSOCIATES |
| 2025-12-12 | Gruber James R.Officer | 5K | $92K | 0.020% | 2025-12-12 | Raymond James & Associates |
| 2025-12-12 | Krempa DavidOfficer | 8K | $127K | 0.028% | 2025-12-12 | Raymond James & Associates |
| 2025-12-12 | Erdogan-Trinkaus IpekOfficer | 99 | $2K | 0.000% | 2025-12-12 | Raymond James & Associates |
| 2025-12-12 | BRYNJELSEN SEANOfficer, Director, 10% Stockholder | 8K | $136K | 0.030% | 2025-12-12 | Raymond James & Associates |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON1 holder reports 5% or more of ETON in its latest filing, on Schedule 13G (passive). The holder is BlackRock, Inc. at 6.9% of the class (1,882,410 shares), filed 2026-07-28 for an event on 2026-06-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-07-28 | 13G/Ano. 1 | BlackRock, Inc.parent holding company | 1.9M | 6.9% | 2026-06-30 |
| 2026-03-26 | 13G/Ano. 1 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
13F holders
Tracked managers holding ETON at their latest 13F. JSON5 of the 30 tracked managers held ETON at their latest 13F, $16.3M in total at quarter-end prices. D. E. Shaw & Co. is the largest at $6.8M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 2 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| D. E. Shaw & Co. | 2026-06-30 | 188K | $6.8M | 0.00% | new |
| Two Sigma Investments | 2026-06-30 | 116K | $4.2M | 0.00% | +10K |
| Renaissance Technologies | 2026-06-30 | 52K | $1.9M | 0.00% | -111K |
| Citadel Advisors | 2026-06-30 | 49K | $1.8M | 0.00% | -59K |
| Point72 Asset Management | 2026-06-30 | 45K | $1.6M | 0.00% | new |
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
Eton 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 Eton Pharmaceuticals (ETON), SEC CIK 1710340, 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 2026-08-24.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 2026-10-06.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 2026-07-28.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 2026-08-13.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 2026-10-06.JSON and CSV
- Company record
- EDGAR filing index for CIK 1710340Ticker, 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 ETON is sold short?
1,943,339 shares were held short at the 2026-10-15 settlement, 3.3 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 ETON's daily short volume?
On 2026-11-02, 169,874 of the 249,277 ETON 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 ETON have fails to deliver?
The SEC's latest file shows 816 ETON shares failed to deliver at settlement 2026-08-24. Fails are reported per settlement date and published twice a month with a lag.
Are ETON insiders buying or selling?
Insiders at ETON reported 9 open-market sells worth $10.9M in the last 90 days and no open-market buys. Latest filing: Krempa David (Chief Business Officer) on 2026-10-06.
Have ETON insiders filed to sell?
19 Form 144 notices on file for ETON worth $37.8M at the prices reported; 5 in the last 90 days worth $17.5M. Latest: Krempa David filed on 2026-10-06 to sell 4,166 shares ($229K) from 2026-10-06.
Who owns 5% or more of ETON?
1 holder reports 5% or more of ETON in its latest filing, on Schedule 13G (passive). The holder is BlackRock, Inc. at 6.9% of the class (1,882,410 shares), filed 2026-07-28 for an event on 2026-06-30.
Which tracked 13F managers own ETON?
5 of the 30 tracked 13F managers held ETON shares at their latest filing, $16.3M in all. The largest: D. E. Shaw & Co. (188K shares, $6.8M), Two Sigma Investments (116K shares, $4.2M), Renaissance Technologies (52K shares, $1.9M), Ken Griffin's Citadel Advisors (49K shares, $1.8M), Steve Cohen's Point72 Asset Management (45K shares, $1.6M).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.