Hudson Technologies (HDSN)
Hudson Technologies on one page: short interest, daily short volume, fails to deliver, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as wholesale-machinery, equipment & supplies.
2.7M
Short interest
settlement 2026-09-30
5.9
Days to cover
-0.5 days vs prior
49.0%
Short share of volume
2026-10-23
727
Fails to deliver
settlement 2026-09-08
Mon 2 Nov
Next earnings
estimated date
$1.7M
Insider flow, 90 days
9 buys, 0 sells
As of 2026-10-23.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 30 September 2026, short interest in HDSN is 2,688,167 shares, down 479,614 shares over the last month. Over the last 48 readings it ranged from 481,861 shares (15 November 2024) to 3,167,781 shares (31 August 2026). At the reported average volume of 452K shares a day that is 5.9 days to cover.
Embed this chart.The embed keeps its attribution line.
<iframe src="https://xoomar.com/embed/stocks/hdsn" 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 |
|---|---|---|---|---|
| 2026-09-30 | 2,688,167 | -5.3% | 452,181 | 5.94 |
| 2026-09-15 | 2,837,071 | -10.4% | 440,429 | 6.44 |
| 2026-08-31 | 3,167,781 | +41.1% | 887,084 | 3.57 |
| 2026-08-14 | 2,244,366 | +9.3% | 536,644 | 4.18 |
| 2026-07-31 | 2,053,012 | -1.3% | 387,639 | 5.30 |
| 2026-07-15 | 2,079,019 | +12.1% | 668,560 | 3.11 |
| 2026-06-30 | 1,854,523 | +10.6% | 517,222 | 3.59 |
| 2026-06-15 | 1,676,823 | +0.7% | 430,551 | 3.89 |
| 2026-05-29 | 1,665,001 | +8.4% | 665,963 | 2.50 |
| 2026-05-15 | 1,535,791 | +13.1% | 577,046 | 2.66 |
| 2026-04-30 | 1,357,730 | +1.5% | 227,092 | 5.98 |
| 2026-04-15 | 1,337,634 | -0.8% | 257,382 | 5.20 |
| 2026-03-31 | 1,347,958 | +0.5% | 402,469 | 3.35 |
| 2026-03-13 | 1,341,286 | +2.4% | 489,366 | 2.74 |
| 2026-02-27 | 1,310,031 | +5.0% | 260,660 | 5.03 |
| 2026-02-13 | 1,248,003 | +2.5% | 223,282 | 5.59 |
| 2026-01-30 | 1,217,271 | +8.9% | 203,135 | 5.99 |
| 2026-01-15 | 1,118,212 | -4.8% | 217,047 | 5.15 |
| 2025-12-31 | 1,174,892 | +6.0% | 289,104 | 4.06 |
| 2025-12-15 | 1,108,284 | -13.1% | 597,991 | 1.85 |
| 2025-11-28 | 1,275,534 | +20.8% | 346,824 | 3.68 |
| 2025-11-14 | 1,055,576 | +14.2% | 569,566 | 1.85 |
| 2025-10-31 | 924,652 | -4.4% | 182,915 | 5.06 |
| 2025-10-15 | 966,974 | -4.3% | 229,639 | 4.21 |
| 2025-09-30 | 1,010,184 | -5.6% | 275,758 | 3.66 |
| 2025-09-15 | 1,069,959 | -5.4% | 231,232 | 4.63 |
| 2025-08-29 | 1,131,147 | -6.0% | 403,332 | 2.80 |
| 2025-08-15 | 1,203,868 | -20.7% | 503,344 | 2.39 |
| 2025-07-31 | 1,518,032 | -1.9% | 524,655 | 2.89 |
| 2025-07-15 | 1,546,982 | +18.3% | 247,813 | 6.24 |
| 2025-06-30 | 1,307,673 | -14.2% | 525,827 | 2.49 |
| 2025-06-13 | 1,524,597 | +31.2% | 313,024 | 4.87 |
| 2025-05-30 | 1,161,957 | +4.8% | 340,563 | 3.41 |
| 2025-05-15 | 1,109,170 | -9.5% | 828,137 | 1.34 |
| 2025-04-30 | 1,225,236 | +54.0% | 538,614 | 2.27 |
| 2025-04-15 | 795,877 | +2.7% | 522,458 | 1.52 |
| 2025-03-31 | 774,673 | +1.6% | 377,873 | 2.05 |
| 2025-03-14 | 762,849 | +28.0% | 622,515 | 1.23 |
| 2025-02-28 | 595,850 | +10.2% | 434,661 | 1.37 |
| 2025-02-14 | 540,512 | +4.0% | 327,569 | 1.65 |
| 2025-01-31 | 519,510 | +2.6% | 307,137 | 1.69 |
| 2025-01-15 | 506,458 | -0.7% | 401,828 | 1.26 |
| 2024-12-31 | 509,757 | -4.7% | 516,221 | 1.00 |
| 2024-12-13 | 534,666 | -16.3% | 572,275 | 1.00 |
| 2024-11-29 | 638,792 | +32.6% | 646,817 | 1.00 |
| 2024-11-15 | 481,861 | -34.3% | 1,393,880 | 1.00 |
| 2024-10-31 | 733,259 | -9.0% | 359,040 | 2.04 |
| 2024-10-15 | 806,025 | -9.0% | 430,388 | 1.87 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 23 October 2026, the short share of HDSN volume is 49.0%, up 2.8 points over the last five sessions. Over the last 30 readings it ranged from 26.7% (21 September 2026) to 70.8% (19 October 2026). The latest reading is 3.6 points below the 30-session average of 52.6%, on 217K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-23 | 107K | 217K | 49.0% | 1,696 |
| 2026-10-22 | 61K | 187K | 32.5% | 37 |
| 2026-10-21 | 70K | 128K | 54.7% | 0 |
| 2026-10-20 | 157K | 276K | 56.9% | 3,361 |
| 2026-10-19 | 77K | 109K | 70.8% | 0 |
| 2026-10-16 | 86K | 186K | 46.2% | 200 |
| 2026-10-15 | 61K | 123K | 49.6% | 1,002 |
| 2026-10-14 | 145K | 223K | 65.2% | 750 |
| 2026-10-13 | 47K | 76K | 61.4% | 0 |
| 2026-10-12 | 36K | 65K | 54.9% | 0 |
| 2026-10-09 | 79K | 125K | 63.6% | 2,000 |
| 2026-10-08 | 28K | 62K | 45.8% | 313 |
| 2026-10-07 | 56K | 100K | 56.6% | 1,045 |
| 2026-10-06 | 96K | 151K | 63.7% | 396 |
| 2026-10-05 | 65K | 153K | 42.4% | 43 |
| 2026-10-02 | 35K | 63K | 55.5% | 0 |
| 2026-10-01 | 80K | 123K | 65.2% | 296 |
| 2026-09-30 | 106K | 194K | 54.4% | 53 |
| 2026-09-29 | 79K | 147K | 53.7% | 0 |
| 2026-09-28 | 35K | 71K | 49.3% | 246 |
| 2026-09-25 | 49K | 106K | 46.0% | 0 |
| 2026-09-24 | 230K | 325K | 70.8% | 2,477 |
| 2026-09-23 | 80K | 146K | 55.1% | 112 |
| 2026-09-22 | 39K | 119K | 32.7% | 0 |
| 2026-09-21 | 80K | 299K | 26.7% | 0 |
| 2026-09-18 | 88K | 182K | 48.5% | 500 |
| 2026-09-17 | 52K | 126K | 41.5% | 807 |
| 2026-09-16 | 56K | 106K | 53.1% | 0 |
| 2026-09-15 | 83K | 145K | 57.5% | 5,583 |
| 2026-09-14 | 71K | 128K | 55.7% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 8 September 2026, the fails-to-deliver balance in HDSN is 727 shares, down 55,364 shares over the last settlement date. Over the last 30 readings it ranged from 8 shares (12 August 2026) to 91,992 shares (11 March 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-08 | 727 | $5.35 | $4K |
| 2026-09-04 | 56,091 | $5.25 | $294K |
| 2026-09-03 | 1,445 | $5.12 | $7K |
| 2026-08-18 | 7,283 | $6.15 | $45K |
| 2026-08-14 | 22 | $5.67 | $125 |
| 2026-08-12 | 8 | $5.53 | $44 |
| 2026-07-21 | 787 | $6.11 | $5K |
| 2026-07-07 | 4,395 | $6.02 | $26K |
| 2026-07-02 | 748 | $5.67 | $4K |
| 2026-06-30 | 175 | $5.48 | $959 |
| 2026-06-24 | 277 | $5.76 | $2K |
| 2026-06-15 | 2,136 | $5.78 | $12K |
| 2026-06-11 | 3,857 | $5.45 | $21K |
| 2026-06-03 | 535 | $5.30 | $3K |
| 2026-05-13 | 2,782 | $4.96 | $14K |
| 2026-05-12 | 1,164 | $5.11 | $6K |
| 2026-05-08 | 4,828 | $5.30 | $26K |
| 2026-05-04 | 10 | $6.25 | $63 |
| 2026-05-01 | 60 | $6.26 | $376 |
| 2026-04-28 | 131 | $6.33 | $829 |
| 2026-03-11 | 91,992 | $5.98 | $550K |
| 2026-03-10 | 57,632 | $6.06 | $349K |
| 2026-02-27 | 6,839 | $7.15 | $49K |
| 2026-02-04 | 13 | $7.54 | $98 |
| 2026-02-03 | 285 | $7.38 | $2K |
| 2026-02-02 | 285 | $7.17 | $2K |
| 2026-01-30 | 337 | $7.14 | $2K |
| 2026-01-23 | 720 | $7.47 | $5K |
| 2025-11-20 | 2,537 | $6.64 | $17K |
| 2025-11-10 | 81,067 | $6.85 | $555K |
Insider trades
SEC Form 4, newest first. JSONInsiders at HDSN reported 9 open-market buys worth $1.7M in the last 90 days and no open-market sells. Latest filing: Hartree Partners, LP (10% owner) on 2026-09-24.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-09-24 | Hartree Partners, LP | 10% owner | Buy | 119K | $5.10 | $604K | 5.3M |
| 2026-09-23 | Hartree Partners, LP | 10% owner | Buy | 11K | $5.10 | $56K | 5.2M |
| 2026-09-21 | Hartree Partners, LP | 10% owner | Buy | 3K | $5.10 | $13K | 5.2M |
| 2026-09-16 | Hartree Partners, LP | 10% owner | Buy | 11K | $5.10 | $57K | 5.2M |
| 2026-09-02 | Hartree Partners, LP | 10% owner | Buy | 5K | $5.10 | $27K | 5.2M |
| 2026-08-25 | Hartree Partners, LP | 10% owner | Buy | 91K | $5.50 | $501K | 5.2M |
| 2026-08-24 | Hartree Partners, LP | 10% owner | Buy | 9K | $5.50 | $52K | 5.1M |
| 2026-08-12 | Hartree Partners, LP | 10% owner | Buy | 5K | $5.50 | $29K | 5.1M |
| 2026-07-29 | Hartree Partners, LP | 10% owner | Buy | 52K | $5.99 | $312K | 5.1M |
| 2026-07-21 | Hartree Partners, LP | 10% owner | Buy | 48K | $5.99 | $286K | 5.0M |
| 2026-07-20 | Hartree Partners, LP | 10% owner | Buy | 18K | $5.99 | $107K | 5.0M |
| 2026-07-07 | Hartree Partners, LP | 10% owner | Buy | 600 | $5.99 | $4K | 5.0M |
| 2026-07-06 | Hartree Partners, LP | 10% owner | Buy | 5K | $5.99 | $28K | 5.0M |
| 2026-07-02 | Hartree Partners, LP | 10% owner | Buy | 271K | $5.97 | $1.6M | 5.0M |
| 2026-07-01 | Hartree Partners, LP | 10% owner | Buy | 288K | $5.88 | $1.7M | 4.7M |
| 2026-06-30 | Hartree Partners, LP | 10% owner | Buy | 205K | $5.68 | $1.2M | 4.4M |
| 2026-06-17 | Feeler Jeffrey R | Director | Grant | 3K | $0.00 | $0 | 12K |
| 2026-06-17 | Mansy Loan Nguyen | Director | Grant | 9K | $0.00 | $0 | 34K |
| 2026-06-17 | Prouty Eric A | Director | Grant | 4K | $0.00 | $0 | 158K |
| 2026-06-17 | Sheriff Alan | Director | Grant | 3K | $0.00 | $0 | 12K |
| 2026-05-19 | Bertaux Brian J. | Chief Financial Officer | Buy | 2K | $4.87 | $10K | 2K |
| 2026-05-14 | Mansy Loan Nguyen | Director | Buy | 1K | $4.97 | $7K | 26K |
| 2026-05-14 | Mansy Loan Nguyen | Director | Buy | 4K | $4.96 | $18K | 24K |
| 2026-05-14 | Parrillo Richard | Director | Buy | 1K | $4.97 | $7K | 26K |
| 2026-05-14 | Parrillo Richard | Director | Buy | 4K | $4.96 | $18K | 24K |
| 2026-05-14 | Feeler Jeffrey R | Director | Buy | 5K | $4.92 | $25K | 9K |
| 2026-05-14 | Bulgarino Nicole E | Director | Buy | 550 | $4.84 | $3K | 11K |
| 2026-05-13 | Parrillo Richard | Director | Buy | 10K | $4.83 | $48K | 196K |
| 2026-05-13 | Prouty Eric A | Director | Buy | 5K | $4.84 | $24K | 154K |
| 2026-05-13 | Sheriff Alan | Director | Buy | 5K | $4.88 | $25K | 9K |
| 2026-05-13 | Gaglione Kenneth | President and CEO | Buy | 5K | $4.89 | $24K | 5K |
| 2026-04-10 | Sheriff Alan | Director | Grant | 4K | $0.00 | $0 | 4K |
| 2026-04-10 | Feeler Jeffrey R | Director | Grant | 4K | $0.00 | $0 | 4K |
| 2026-01-08 | Houghton Kathleen | Sr. VP-Sales and Marketing | Tax withholding | 34K | $7.10 | $244K | 159K |
| 2026-01-08 | Houghton Kathleen | Sr. VP-Sales and Marketing | Exercise or conversion | 51K | $3.81 | $194K | 193K |
| 2026-01-08 | Houghton Kathleen | Sr. VP-Sales and Marketing | Tax withholding | 22K | $7.10 | $155K | 142K |
| 2026-01-08 | Houghton Kathleen | Sr. VP-Sales and Marketing | Exercise or conversion | 48K | $1.60 | $76K | 164K |
| 2026-01-08 | Houghton Kathleen | Sr. VP-Sales and Marketing | Tax withholding | 45K | $7.10 | $319K | 116K |
| 2026-01-08 | Houghton Kathleen | Sr. VP-Sales and Marketing | Exercise or conversion | 120K | $0.75 | $90K | 161K |
| 2025-12-05 | COLEMAN BRIAN F | Other | Sell | 485K | $7.40 | $3.6M | 427K |
| 2025-12-05 | COLEMAN BRIAN F | Director | Sell | 485K | $7.40 | $3.6M | 1.9M |
| 2025-11-17 | ABBATECOLA VINCENT P | Director | Buy | 4K | $6.79 | $24K | 170K |
| 2025-09-24 | ABBATECOLA VINCENT P | Director | Tax withholding | 4K | $9.91 | $35K | 166K |
| 2025-09-24 | ABBATECOLA VINCENT P | Director | Exercise or conversion | 5K | $7.35 | $35K | 170K |
| 2025-07-31 | Prouty Eric A | Director | Tax withholding | 4K | $9.39 | $35K | 149K |
| 2025-07-31 | Prouty Eric A | Director | Exercise or conversion | 5K | $7.35 | $35K | 153K |
| 2025-06-18 | Mansy Loan Nguyen | Director | Grant | 6K | $0.00 | $0 | 21K |
| 2025-06-18 | Parrillo Richard | Director | Grant | 3K | $0.00 | $0 | 186K |
| 2025-06-18 | Prouty Eric A | Director | Grant | 3K | $0.00 | $0 | 148K |
| 2025-06-18 | Bulgarino Nicole E | Director | Grant | 3K | $0.00 | $0 | 10K |
| 2025-06-18 | ABBATECOLA VINCENT P | Director | Grant | 3K | $0.00 | $0 | 165K |
| 2024-11-07 | ABBATECOLA VINCENT P | Director | Buy | 3K | $5.98 | $15K | 162K |
| 2024-06-19 | Parrillo Richard | Director | Grant | 3K | $0.00 | $0 | 183K |
| 2024-06-19 | Mansy Loan Nguyen | Director | Grant | 6K | $0.00 | $0 | 14K |
| 2024-06-19 | Bulgarino Nicole E | Director | Grant | 4K | $0.00 | $0 | 7K |
| 2024-06-14 | ABBATECOLA VINCENT P | Director | Sell | 10K | $9.20 | $92K | 159K |
| 2024-06-12 | ABBATECOLA VINCENT P | Director | Tax withholding | 3K | $9.21 | $28K | 169K |
| 2024-06-12 | ABBATECOLA VINCENT P | Director | Exercise or conversion | 8K | $3.40 | $28K | 172K |
| 2023-12-14 | Parrillo Richard | Director | Sell | 51 | $13.27 | $677 | 185K |
| 2023-12-14 | Parrillo Richard | Director | Sell | 2K | $13.31 | $30K | 198K |
| 2023-12-14 | Parrillo Richard | Director | Sell | 55 | $13.32 | $733 | 198K |
| 2023-12-14 | Parrillo Richard | Director | Sell | 13K | $13.30 | $169K | 185K |
| 2023-12-14 | Parrillo Richard | Director | Sell | 51 | $13.26 | $676 | 185K |
| 2023-12-14 | Parrillo Richard | Director | Sell | 5K | $13.25 | $68K | 180K |
| 2023-12-13 | Parrillo Richard | Director | Sell | 11K | $12.95 | $144K | 211K |
| 2023-12-13 | Parrillo Richard | Director | Sell | 10K | $12.91 | $127K | 201K |
| 2023-12-13 | Parrillo Richard | Director | Sell | 300 | $12.96 | $4K | 201K |
| 2023-12-13 | Parrillo Richard | Director | Sell | 134 | $12.92 | $2K | 201K |
| 2023-12-13 | Parrillo Richard | Director | Sell | 1K | $12.91 | $13K | 200K |
| 2023-12-12 | Parrillo Richard | Director | Sell | 10K | $12.95 | $130K | 232K |
| 2023-12-12 | Parrillo Richard | Director | Sell | 10K | $12.75 | $128K | 242K |
| 2023-12-12 | Parrillo Richard | Director | Sell | 10K | $12.85 | $129K | 222K |
| 2023-10-25 | ABBATECOLA VINCENT P | Director | Tax withholding | 3K | $12.96 | $40K | 164K |
| 2023-10-25 | ABBATECOLA VINCENT P | Director | Exercise or conversion | 21K | $1.88 | $40K | 167K |
| 2023-09-12 | Gaglione Kenneth | VP-Operations | Exercise or conversion | 24K | $3.81 | $91K | 94K |
| 2023-09-12 | Gaglione Kenneth | VP-Operations | Tax withholding | 12K | $12.14 | $147K | 70K |
| 2023-09-12 | Gaglione Kenneth | VP-Operations | Exercise or conversion | 24K | $1.60 | $38K | 82K |
| 2023-09-12 | Gaglione Kenneth | VP-Operations | Tax withholding | 45K | $12.14 | $544K | 58K |
| 2023-09-12 | Gaglione Kenneth | VP-Operations | Exercise or conversion | 90K | $1.23 | $111K | 103K |
| 2023-09-12 | Gaglione Kenneth | VP-Operations | Tax withholding | 30K | $12.14 | $366K | 82K |
| 2023-09-12 | Gaglione Kenneth | VP-Operations | Tax withholding | 14K | $12.14 | $175K | 79K |
| 2023-09-12 | Gaglione Kenneth | VP-Operations | Exercise or conversion | 33K | $10.09 | $337K | 112K |
| 2023-07-19 | Parrillo Richard | Director | Exercise or conversion | 22K | $0.98 | $21K | 255K |
| 2023-07-19 | Parrillo Richard | Director | Tax withholding | 2K | $9.46 | $21K | 252K |
| 2023-07-19 | ABBATECOLA VINCENT P | Director | Exercise or conversion | 22K | $0.98 | $21K | 148K |
| 2023-07-19 | ABBATECOLA VINCENT P | Director | Tax withholding | 2K | $9.46 | $21K | 146K |
| 2023-06-14 | Prouty Eric A | Director | Sell | 20K | $9.56 | $191K | 142K |
| 2023-06-14 | Mansy Loan Nguyen | Director | Grant | 5K | $0.00 | $0 | 9K |
| 2023-06-14 | Prouty Eric A | Director | Grant | 3K | $0.00 | $0 | 145K |
| 2023-06-02 | Prouty Eric A | Director | Tax withholding | 5K | $9.21 | $43K | 162K |
| 2023-06-02 | Prouty Eric A | Director | Exercise or conversion | 43K | $0.98 | $43K | 167K |
| 2023-03-14 | ABBATECOLA VINCENT P | Director | Buy | 1K | $8.27 | $8K | 127K |
| 2023-01-06 | MANDRACCHIA STEPHEN P | Director | Gift | 10K | $0.00 | $0 | 397K |
| 2022-12-13 | Gaglione Kenneth | VP-Operations | Tax withholding | 15K | $11.74 | $170K | 13K |
| 2022-12-13 | Gaglione Kenneth | VP-Operations | Exercise or conversion | 24K | $3.81 | $91K | 27K |
| 2022-12-12 | Gaglione Kenneth | VP-Operations | Sell | 19K | $11.53 | $219K | 3K |
| 2022-11-09 | Krishnamurti Nat | CFO | Sell | 46K | $10.13 | $468K | 25K |
| 2022-11-08 | Krishnamurti Nat | CFO | Sell | 45K | $10.66 | $480K | 71K |
| 2022-11-08 | Krishnamurti Nat | CFO | Tax withholding | 84K | $10.80 | $905K | 116K |
| 2022-11-08 | Krishnamurti Nat | CFO | Exercise or conversion | 175K | $0.75 | $131K | 200K |
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.
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON2 holders report 5% or more of HDSN in their latest filing, all on Schedule 13G (passive). The largest reported stake is Hartree Partners, LP at 11.8% of the class (4,971,302 shares), filed 2026-07-02 for an event on 2026-06-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-07-14 | 13G/Ano. 1 | Dimensional Fund Advisors LPinvestment adviser | 2.0M | 4.7% | 2026-06-30 |
| 2026-07-02 | 13G/Ano. 1 | Hartree Partners, LPpartnership | 5.0M | 11.8% | 2026-06-30 |
| 2026-03-27 | 13G/Ano. 2 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-02-17 | 13G/Ano. 1 | WESTERLY CAPITAL MANAGEMENT, LLCinvestment adviser | n/a | 5.9% | 2025-12-31 |
13F holders
Tracked managers holding HDSN at their latest 13F. JSON6 of the 30 tracked managers held HDSN at their latest 13F, $15.9M in total at quarter-end prices. Renaissance Technologies is the largest at $8.3M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 3 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Renaissance Technologies | 2026-06-30 | 1.4M | $8.3M | 0.01% | -62K |
| Citadel Advisors | 2026-06-30 | 574K | $3.3M | 0.00% | +162K |
| D. E. Shaw & Co. | 2026-06-30 | 410K | $2.4M | 0.00% | +51K |
| AQR Capital Management | 2026-06-30 | 162K | $929K | 0.00% | -182K |
| Two Sigma Investments | 2026-06-30 | 132K | $757K | 0.00% | -141K |
| Point72 Asset Management | 2026-06-30 | 46K | $262K | 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
Hudson Technologies 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 Hudson Technologies (HDSN), SEC CIK 925528, listed on Nasdaq, classified by the SEC as wholesale-machinery, equipment & supplies. 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 2026-09-30.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-23.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-08.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 2026-07-14.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 2026-08-05.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 2026-09-24.JSON and CSV
- Company record
- EDGAR filing index for CIK 925528Ticker, 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 HDSN is sold short?
2,688,167 shares were held short at the 2026-09-30 settlement, 5.9 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 HDSN's daily short volume?
On 2026-10-23, 106,584 of the 217,289 HDSN shares reported to FINRA were sold short, 49.0% of the day's reported volume. Short volume is a flow for one day, not a position.
Does HDSN have fails to deliver?
The SEC's latest file shows 727 HDSN shares failed to deliver at settlement 2026-09-08. Fails are reported per settlement date and published twice a month with a lag.
Are HDSN insiders buying or selling?
Insiders at HDSN reported 9 open-market buys worth $1.7M in the last 90 days and no open-market sells. Latest filing: Hartree Partners, LP (10% owner) on 2026-09-24.
Who owns 5% or more of HDSN?
2 holders report 5% or more of HDSN in their latest filing, all on Schedule 13G (passive). The largest reported stake is Hartree Partners, LP at 11.8% of the class (4,971,302 shares), filed 2026-07-02 for an event on 2026-06-30.
Which tracked 13F managers own HDSN?
6 of the 30 tracked 13F managers held HDSN shares at their latest filing, $15.9M in all. The largest: Renaissance Technologies (1.4M shares, $8.3M), Ken Griffin's Citadel Advisors (574K shares, $3.3M), D. E. Shaw & Co. (410K shares, $2.4M), Cliff Asness's AQR Capital Management (162K shares, $929K), Two Sigma Investments (132K shares, $757K), Steve Cohen's Point72 Asset Management (46K shares, $262K).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.