One Stop Systems (OSS)
One Stop Systems 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 electronic computers.
4.5M
Short interest
settlement 2026-09-30
7.0
Days to cover
unchanged vs prior
56.5%
Short share of volume
2026-10-22
5,346
Fails to deliver
settlement 2026-09-21
Wed 4 Nov
Next earnings
estimated date
$0
Insider flow, 90 days
0 buys, 0 sells
As of 2026-10-22.
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 OSS is 4,481,515 shares, down 161,721 shares over the last month. Over the last 48 readings it ranged from 18,249 shares (15 November 2024) to 4,702,047 shares (15 September 2026). The latest reading sits at the top of that range. At the reported average volume of 643K shares a day that is 7.0 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-09-30 | 4,481,515 | -4.7% | 643,188 | 6.97 |
| 2026-09-15 | 4,702,047 | +1.3% | 674,638 | 6.97 |
| 2026-08-31 | 4,643,236 | +1.4% | 848,924 | 5.47 |
| 2026-08-14 | 4,580,472 | +10.5% | 947,129 | 4.84 |
| 2026-07-31 | 4,146,746 | +23.2% | 1,099,561 | 3.77 |
| 2026-07-15 | 3,366,149 | -4.2% | 1,157,420 | 2.91 |
| 2026-06-30 | 3,512,325 | +19.0% | 1,501,039 | 2.34 |
| 2026-06-15 | 2,952,355 | -18.8% | 1,292,235 | 2.28 |
| 2026-05-29 | 3,636,713 | -1.6% | 1,435,245 | 2.53 |
| 2026-05-15 | 3,697,048 | +115.0% | 3,365,761 | 1.10 |
| 2026-04-30 | 1,719,422 | +15.5% | 1,212,594 | 1.42 |
| 2026-04-15 | 1,488,134 | +15.3% | 1,273,119 | 1.17 |
| 2026-03-31 | 1,290,587 | -35.2% | 2,003,977 | 1.00 |
| 2026-03-13 | 1,992,549 | +32.6% | 1,266,274 | 1.57 |
| 2026-02-27 | 1,502,990 | +2.8% | 1,701,530 | 1.00 |
| 2026-02-13 | 1,461,898 | -39.8% | 1,738,433 | 1.00 |
| 2026-01-30 | 2,428,852 | +24.8% | 3,116,173 | 1.00 |
| 2026-01-15 | 1,946,653 | +857.5% | 4,163,986 | 1.00 |
| 2025-12-31 | 203,309 | +11.9% | 529,008 | 1.00 |
| 2025-12-15 | 181,698 | -44.2% | 695,299 | 1.00 |
| 2025-11-28 | 325,388 | +136.6% | 745,956 | 1.00 |
| 2025-11-14 | 137,522 | +24.6% | 574,503 | 1.00 |
| 2025-10-31 | 110,353 | +23.9% | 437,446 | 1.00 |
| 2025-10-15 | 89,084 | -84.6% | 910,644 | 1.00 |
| 2025-09-30 | 579,286 | +563.8% | 1,028,550 | 1.00 |
| 2025-09-15 | 87,270 | -11.5% | 379,535 | 1.00 |
| 2025-08-29 | 98,629 | -47.5% | 826,544 | 1.00 |
| 2025-08-15 | 187,926 | +17.7% | 443,728 | 1.00 |
| 2025-07-31 | 159,726 | +8.4% | 581,267 | 1.00 |
| 2025-07-15 | 147,344 | +4.7% | 590,525 | 1.00 |
| 2025-06-30 | 140,697 | -13.3% | 718,231 | 1.00 |
| 2025-06-13 | 162,337 | +54.7% | 426,864 | 1.00 |
| 2025-05-30 | 104,938 | +2.4% | 121,096 | 1.00 |
| 2025-05-15 | 102,471 | -25.0% | 107,149 | 1.00 |
| 2025-04-30 | 136,691 | -14.4% | 50,579 | 2.70 |
| 2025-04-15 | 159,638 | -19.5% | 100,329 | 1.59 |
| 2025-03-31 | 198,211 | +43.3% | 196,807 | 1.01 |
| 2025-03-14 | 138,295 | -4.1% | 133,985 | 1.03 |
| 2025-02-28 | 144,202 | -0.1% | 417,708 | 1.00 |
| 2025-02-14 | 144,370 | +137.3% | 337,631 | 1.00 |
| 2025-01-31 | 60,833 | +61.7% | 280,546 | 1.00 |
| 2025-01-15 | 37,619 | +65.0% | 150,412 | 1.00 |
| 2024-12-31 | 22,803 | -6.5% | 185,387 | 1.00 |
| 2024-12-13 | 24,389 | +5.8% | 102,943 | 1.00 |
| 2024-11-29 | 23,052 | +26.3% | 82,935 | 1.00 |
| 2024-11-15 | 18,249 | -25.6% | 76,856 | 1.00 |
| 2024-10-31 | 24,539 | -15.0% | 52,796 | 1.00 |
| 2024-10-15 | 28,874 | -24.3% | 87,788 | 1.00 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 22 October 2026, the short share of OSS volume is 56.5%, up 8.0 points over the last five sessions. Over the last 30 readings it ranged from 19.9% (6 October 2026) to 72.9% (9 October 2026). The latest reading is 6.6 points above the 30-session average of 49.9%, on 455K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-22 | 257K | 455K | 56.5% | 2,908 |
| 2026-10-21 | 80K | 154K | 52.2% | 0 |
| 2026-10-20 | 116K | 249K | 46.5% | 3,303 |
| 2026-10-19 | 135K | 260K | 51.9% | 19,606 |
| 2026-10-16 | 208K | 482K | 43.3% | 12,897 |
| 2026-10-15 | 329K | 678K | 48.5% | 40 |
| 2026-10-14 | 328K | 669K | 49.0% | 4,469 |
| 2026-10-13 | 197K | 369K | 53.3% | 2,251 |
| 2026-10-12 | 280K | 523K | 53.6% | 6,075 |
| 2026-10-09 | 310K | 425K | 72.9% | 0 |
| 2026-10-08 | 309K | 549K | 56.4% | 2,189 |
| 2026-10-07 | 337K | 766K | 44.0% | 1,039 |
| 2026-10-06 | 159K | 796K | 19.9% | 0 |
| 2026-10-05 | 226K | 452K | 50.1% | 243 |
| 2026-10-02 | 263K | 1.2M | 21.8% | 293 |
| 2026-10-01 | 180K | 294K | 61.2% | 0 |
| 2026-09-30 | 119K | 283K | 41.8% | 50 |
| 2026-09-29 | 178K | 281K | 63.6% | 310 |
| 2026-09-28 | 84K | 196K | 43.0% | 123 |
| 2026-09-25 | 99K | 202K | 48.9% | 1,000 |
| 2026-09-24 | 135K | 245K | 54.9% | 2,264 |
| 2026-09-23 | 93K | 259K | 35.8% | 2,524 |
| 2026-09-22 | 148K | 287K | 51.4% | 608 |
| 2026-09-21 | 132K | 289K | 45.8% | 764 |
| 2026-09-18 | 134K | 244K | 54.9% | 0 |
| 2026-09-17 | 202K | 386K | 52.3% | 0 |
| 2026-09-16 | 235K | 502K | 46.7% | 2,356 |
| 2026-09-15 | 132K | 242K | 54.4% | 17 |
| 2026-09-14 | 246K | 381K | 64.6% | 0 |
| 2026-09-11 | 108K | 190K | 56.9% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 21 September 2026, the fails-to-deliver balance in OSS is 5,346 shares, up 390 shares over the last settlement date. Over the last 30 readings it ranged from 28 shares (2 July 2026) to 89,564 shares (14 May 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-21 | 5,346 | $9.05 | $48K |
| 2026-09-18 | 4,956 | $9.07 | $45K |
| 2026-09-14 | 416 | $9.19 | $4K |
| 2026-09-08 | 15,910 | $9.97 | $159K |
| 2026-09-02 | 221 | $9.97 | $2K |
| 2026-08-21 | 218 | $11.40 | $2K |
| 2026-08-05 | 95 | $14.27 | $1K |
| 2026-07-31 | 1,354 | $12.00 | $16K |
| 2026-07-30 | 246 | $10.87 | $3K |
| 2026-07-24 | 45 | $13.31 | $599 |
| 2026-07-23 | 50 | $13.01 | $651 |
| 2026-07-06 | 30 | $15.69 | $471 |
| 2026-07-02 | 28 | $17.94 | $502 |
| 2026-06-30 | 469 | $16.58 | $8K |
| 2026-06-24 | 976 | $17.02 | $17K |
| 2026-06-23 | 798 | $18.19 | $15K |
| 2026-06-22 | 6,300 | $18.44 | $116K |
| 2026-06-16 | 2,555 | $17.23 | $44K |
| 2026-06-12 | 1,897 | $16.84 | $32K |
| 2026-06-02 | 8,190 | $18.96 | $155K |
| 2026-06-01 | 59 | $18.18 | $1K |
| 2026-05-29 | 13,817 | $17.91 | $247K |
| 2026-05-27 | 17,154 | $17.44 | $299K |
| 2026-05-22 | 82 | $16.51 | $1K |
| 2026-05-19 | 1,705 | $15.99 | $27K |
| 2026-05-18 | 8,703 | $16.47 | $143K |
| 2026-05-15 | 7,349 | $17.24 | $127K |
| 2026-05-14 | 89,564 | $15.86 | $1.4M |
| 2026-05-13 | 52,947 | $15.55 | $823K |
| 2026-05-12 | 374 | $15.92 | $6K |
Insider trades
SEC Form 4, newest first. JSONNo open-market insider trades were reported for OSS in the last 90 days. The most recent filings are listed below. Latest filing: KNOWLES MICHAEL (Chief Executive Officer) on 2026-08-15.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-08-15 | KNOWLES MICHAEL | Chief Executive Officer | Tax withholding | 9K | $13.61 | $117K | 590K |
| 2026-08-07 | KNOWLES MICHAEL | Chief Executive Officer | Tax withholding | 9K | $13.32 | $115K | 599K |
| 2026-08-07 | Gabel Daniel G. | Chief Financial Officer | Tax withholding | 4K | $13.32 | $51K | 150K |
| 2026-06-05 | KNOWLES MICHAEL | Chief Executive Officer | Tax withholding | 20K | $16.89 | $332K | 607K |
| 2026-05-26 | Matz Gregory W | Director | Sell | 8K | $17.52 | $140K | 79K |
| 2026-05-26 | Herbets Mitchell H | Director | Sell | 5K | $17.62 | $88K | 49K |
| 2026-05-26 | BASSETT DAVID GEORGE | Director | Sell | 8K | $17.64 | $141K | 25K |
| 2026-05-20 | Matz Gregory W | Director | Grant | 12K | $0.00 | $0 | 87K |
| 2026-05-20 | Herbets Mitchell H | Director | Grant | 12K | $0.00 | $0 | 54K |
| 2026-05-20 | Dumont Michael J. | Director | Grant | 12K | $0.00 | $0 | 120K |
| 2026-05-20 | BASSETT DAVID GEORGE | Director | Grant | 12K | $0.00 | $0 | 33K |
| 2026-05-11 | Gabel Daniel G. | Chief Financial Officer | Tax withholding | 2K | $15.68 | $25K | 154K |
| 2026-02-15 | Ison James | CPO | Gift | 4K | $0.00 | $0 | 231K |
| 2026-02-15 | KNOWLES MICHAEL | Chief Executive Officer | Tax withholding | 7K | $8.70 | $58K | 648K |
| 2026-02-15 | Ison James | CPO | Gift | 4K | $0.00 | $0 | 142K |
| 2026-02-15 | Ison James | CPO | Tax withholding | 3K | $8.70 | $27K | 146K |
| 2026-02-07 | Ison James | CPO | Gift | 8K | $0.00 | $0 | 227K |
| 2026-02-07 | KNOWLES MICHAEL | Chief Executive Officer | Grant | 102K | $0.00 | $0 | 668K |
| 2026-02-07 | Gabel Daniel G. | Chief Financial Officer | Grant | 55K | $0.00 | $0 | 163K |
| 2026-02-07 | KNOWLES MICHAEL | Chief Executive Officer | Tax withholding | 13K | $9.24 | $123K | 655K |
| 2026-02-07 | Ison James | CPO | Gift | 8K | $0.00 | $0 | 141K |
| 2026-02-07 | Ison James | CPO | Tax withholding | 7K | $9.24 | $60K | 149K |
| 2026-02-07 | Ison James | CPO | Grant | 34K | $0.00 | $0 | 156K |
| 2026-02-07 | Gabel Daniel G. | Chief Financial Officer | Tax withholding | 8K | $9.24 | $72K | 156K |
| 2025-12-31 | KNOWLES MICHAEL | Chief Executive Officer | Tax withholding | 19K | $7.18 | $137K | 566K |
| 2025-12-31 | Gabel Daniel G. | Chief Financial Officer | Tax withholding | 3K | $7.18 | $23K | 108K |
| 2025-08-20 | Ison James | CPO | Gift | 4K | $0.00 | $0 | 219K |
| 2025-08-20 | Ison James | CPO | Gift | 4K | $0.00 | $0 | 122K |
| 2025-08-20 | Ison James | CPO | Tax withholding | 3K | $5.26 | $16K | 126K |
| 2025-08-20 | KNOWLES MICHAEL | Chief Executive Officer | Tax withholding | 8K | $5.26 | $44K | 585K |
| 2025-06-05 | KNOWLES MICHAEL | Chief Executive Officer | Tax withholding | 19K | $3.06 | $58K | 594K |
| 2025-05-21 | KNOWLES MICHAEL | Chief Executive Officer | Grant | 0 | $0.00 | $0 | 592K |
| 2025-05-21 | Matz Gregory W | Director | Grant | 21K | $0.00 | $0 | 75K |
| 2025-05-21 | Dumont Michael J. | Director | Tax withholding | 21K | $0.00 | $0 | 21K |
| 2025-05-21 | Herbets Mitchell H | Director | Grant | 21K | $0.00 | $0 | 42K |
| 2025-05-21 | KNOWLES MICHAEL | Chief Executive Officer | Grant | 21K | $0.00 | $0 | 613K |
| 2025-05-21 | BASSETT DAVID GEORGE | Director | Grant | 21K | $0.00 | $0 | 21K |
| 2025-02-20 | Ison James | CPO | Gift | 8K | $0.00 | $0 | 214K |
| 2025-02-20 | Ison James | CPO | Tax withholding | 7K | $3.76 | $26K | 137K |
| 2025-02-20 | Ison James | CPO | Gift | 8K | $0.00 | $0 | 129K |
| 2025-02-20 | KNOWLES MICHAEL | Chief Executive Officer | Tax withholding | 17K | $3.76 | $63K | 592K |
| 2025-02-07 | Ison James | CPO | Grant | 44K | $4.06 | $180K | 136K |
| 2025-02-07 | Gabel Daniel G. | Chief Financial Officer | Grant | 71K | $4.06 | $289K | 111K |
| 2025-02-07 | KNOWLES MICHAEL | Chief Executive Officer | Grant | 131K | $4.06 | $534K | 608K |
| 2024-11-11 | Gabel Daniel G. | Chief Financial Officer | Grant | 40K | $0.00 | $0 | 40K |
| 2024-09-23 | Ison James | CPO | Gift | 8K | $0.00 | $0 | 92K |
| 2024-09-23 | Morrison John W Jr. | Chief Financial Officer | Tax withholding | 6K | $2.19 | $13K | 305K |
| 2024-09-23 | Ison James | CPO | Tax withholding | 4K | $2.19 | $10K | 100K |
| 2024-09-23 | Ison James | CPO | Gift | 8K | $0.00 | $0 | 207K |
| 2024-08-20 | Ison James | CPO | Gift | 6K | $0.00 | $0 | 198K |
| 2024-08-20 | Morrison John W Jr. | Chief Financial Officer | Tax withholding | 4K | $2.16 | $9K | 311K |
| 2024-08-20 | Ison James | CPO | Tax withholding | 3K | $2.16 | $7K | 110K |
| 2024-08-20 | Ison James | CPO | Gift | 6K | $0.00 | $0 | 104K |
| 2024-08-14 | Manko Joseph M. Jr. | Director | Buy | 25K | $1.99 | $50K | 1.2M |
| 2024-08-13 | Manko Joseph M. Jr. | Director | Buy | 50K | $1.94 | $97K | 1.1M |
| 2024-07-09 | POTASHNER KENNETH F | Director | Exercise or conversion | 40K | $0.46 | $18K | 399K |
| 2024-07-01 | Manko Joseph M. Jr. | Director | Grant | 21K | $0.00 | $0 | 21K |
| 2024-07-01 | KNOWLES MICHAEL | Chief Executive Officer | Grant | 131K | $0.00 | $0 | 495K |
| 2024-07-01 | Dumont Michael J. | Director | Grant | 21K | $0.00 | $0 | 21K |
| 2024-07-01 | Herbets Mitchell H | Director | Grant | 21K | $0.00 | $0 | 21K |
| 2024-07-01 | Messinger Gioia | Director | Grant | 21K | $0.00 | $0 | 50K |
| 2024-07-01 | Matz Gregory W | Director | Grant | 21K | $0.00 | $0 | 54K |
| 2024-07-01 | POTASHNER KENNETH F | Director | Grant | 21K | $0.00 | $0 | 359K |
| 2024-07-01 | Morrison John W Jr. | Chief Financial Officer | Grant | 71K | $0.00 | $0 | 315K |
| 2024-07-01 | Ison James | CPO | Grant | 44K | $0.00 | $0 | 114K |
| 2024-06-17 | KNOWLES MICHAEL | Chief Executive Officer | Tax withholding | 38K | $2.18 | $83K | 363K |
| 2024-05-23 | Ison James | CPO | Gift | 1K | $0.00 | $0 | 192K |
| 2024-05-23 | Morrison John W Jr. | Chief Financial Officer | Tax withholding | 1K | $2.41 | $3K | 244K |
| 2024-05-23 | Ison James | CPO | Gift | 1K | $0.00 | $0 | 69K |
| 2024-05-23 | Ison James | CPO | Tax withholding | 1K | $2.41 | $2K | 71K |
| 2024-04-01 | RAUN DAVID | Director | Exercise or conversion | 14K | $2.15 | $30K | 426K |
| 2024-04-01 | POTASHNER KENNETH F | Director | Exercise or conversion | 20K | $2.15 | $42K | 338K |
| 2024-03-25 | Ison James | CPO | Gift | 16K | $0.00 | $0 | 191K |
| 2024-03-25 | Morrison John W Jr. | Chief Financial Officer | Tax withholding | 13K | $3.90 | $49K | 245K |
| 2024-03-25 | Ison James | CPO | Gift | 16K | $0.00 | $0 | 72K |
| 2024-03-25 | Ison James | CPO | Tax withholding | 10K | $3.90 | $38K | 87K |
| 2024-02-05 | Ison James | CPO | Gift | 6K | $0.00 | $0 | 97K |
| 2024-02-05 | Morrison John W Jr. | Chief Financial Officer | Tax withholding | 5K | $2.01 | $9K | 258K |
| 2024-02-05 | Ison James | CPO | Gift | 6K | $0.00 | $0 | 175K |
| 2024-02-05 | Ison James | CPO | Tax withholding | 4K | $2.01 | $8K | 103K |
| 2024-01-29 | Ison James | CPO | Exercise or conversion | 7K | $1.08 | $8K | 170K |
| 2024-01-22 | Cooper Steve D | TenPercentOwner | Sell | 206K | $1.81 | $373K | 1.9M |
| 2023-11-21 | Ison James | CPO | Gift | 2K | $0.00 | $0 | 107K |
| 2023-11-21 | Ison James | CPO | Gift | 2K | $0.00 | $0 | 162K |
| 2023-11-21 | Ison James | CPO | Tax withholding | 849 | $2.09 | $2K | 108K |
| 2023-11-21 | Morrison John W Jr. | Chief Financial Officer | Tax withholding | 1K | $2.09 | $3K | 262K |
| 2023-11-17 | Ison James | CPO | Gift | 4K | $0.00 | $0 | 161K |
| 2023-11-17 | Ison James | CPO | Tax withholding | 2K | $1.99 | $5K | 113K |
| 2023-11-17 | Ison James | CPO | Gift | 4K | $0.00 | $0 | 109K |
| 2023-11-17 | Morrison John W Jr. | Chief Financial Officer | Tax withholding | 2K | $1.99 | $5K | 264K |
| 2023-08-18 | Ison James | CPO | Exercise or conversion | 1K | $1.08 | $1K | 157K |
| 2023-08-18 | Ison James | CPO | Exercise or conversion | 15K | $0.46 | $7K | 156K |
| 2023-08-16 | Ison James | CPO | Gift | 6K | $0.00 | $0 | 141K |
| 2023-08-16 | Ison James | CPO | Tax withholding | 3K | $1.77 | $6K | 122K |
| 2023-08-16 | Ison James | CPO | Gift | 6K | $0.00 | $0 | 116K |
| 2023-08-16 | Morrison John W Jr. | Chief Financial Officer | Tax withholding | 4K | $1.77 | $7K | 266K |
| 2023-08-16 | KNOWLES MICHAEL | Chief Executive Officer | Buy | 1K | $1.80 | $2K | 401K |
| 2023-08-15 | Matz Gregory W | Director | Buy | 3K | $1.77 | $4K | 33K |
| 2023-08-14 | RAUN DAVID | Director | Buy | 5K | $1.97 | $10K | 412K |
| 2023-07-31 | Cooper Steve D | TenPercentOwner | Sell | 204K | $2.80 | $570K | 2.1M |
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. JSON3 Form 144 notices on file for OSS worth $369K at the prices reported; 0 in the last 90 days worth $0. Latest: Matz Gregory W filed on 2026-05-26 to sell 8,000 shares ($138K) from 2026-05-26.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-05-26 | Matz Gregory WDirector | 8K | $138K | 0.032% | 2026-05-26 | Fidelity Brokerage Services LLC |
| 2026-05-26 | MITCHELL HERBETSDirector | 5K | $88K | 0.020% | 2026-05-26 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-26 | BASSETT DAVID GEORGEDirector | 8K | $143K | 0.032% | 2026-05-26 | Charles Schwab Corp. |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON3 holders report 5% or more of OSS in their latest filing, all on Schedule 13G (passive). The largest reported stake is BlackRock, Inc. at 7.4% of the class (1,833,734 shares), filed 2026-07-29 for an event on 2026-06-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-10-09 | 13G/Ano. 2 | Galkin Angelicaindividual | 200K | 0.8% | 2026-10-07 |
| 2026-10-09 | 13G/Ano. 2 | Galkin Vladimirindividual | 200K | 0.8% | 2026-10-07 |
| 2026-10-09 | 13G/Ano. 2 | Angelica Galkin Revocable Trust, dated April 21, 2018other entity | 0 | 0.0% | 2026-10-07 |
| 2026-07-29 | 13G | BlackRock, Inc.parent holding company | 1.8M | 7.4% | 2026-06-30 |
| 2026-05-13 | 13G | JANE STREET GROUP, LLCparent holding company | 1.4M | 5.6% | 2026-05-07 |
| 2026-05-13 | 13G | Jane Street Capital, LLCbroker-dealer | 1.1M | 4.6% | 2026-05-07 |
| 2026-05-13 | 13G | Jane Street Global Trading, LLCother entity | 259K | 1.0% | 2026-05-07 |
| 2026-02-17 | 13G/Ano. 3 | Lynrock Lake LPinvestment adviser, partnership | 666K | 2.7% | 2025-12-31 |
| 2026-02-17 | 13G/Ano. 3 | LYNROCK LAKE PARTNERS LLCother entity, parent holding company | 666K | 2.7% | 2025-12-31 |
| 2026-02-17 | 13G/Ano. 3 | Paul Cynthiaindividual, parent holding company | 666K | 2.7% | 2025-12-31 |
| 2026-02-13 | 13G/Ano. 5 | BARD ASSOCIATES INCinvestment adviser | 540K | 2.2% | 2025-11-07 |
| 2025-11-18 | 13G/Ano. 2 | Cynthia Paulindividual, parent holding company | 1.4M | 6.6% | 2025-09-30 |
13F holders
Tracked managers holding OSS at their latest 13F. JSON4 of the 30 tracked managers held OSS at their latest 13F, $17.8M in total at quarter-end prices. Renaissance Technologies is the largest at $7.4M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 2 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Renaissance Technologies | 2026-06-30 | 408K | $7.4M | 0.01% | +148K |
| Millennium Management | 2026-06-30 | 338K | $6.1M | 0.00% | -63K |
| Two Sigma Investments | 2026-06-30 | 162K | $2.9M | 0.00% | new |
| Citadel Advisors | 2026-06-30 | 71K | $1.3M | 0.00% | -285K |
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
One Stop Systems 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 One Stop Systems (OSS), SEC CIK 1394056, listed on Nasdaq, classified by the SEC as electronic computers. 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 2026-10-22.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-21.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 2026-05-26.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 2026-10-09.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 2026-05-08.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 2026-08-15.JSON and CSV
- Company record
- EDGAR filing index for CIK 1394056Ticker, 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.
Other companies the SEC classifies as electronic computers
Other company pages
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- MANHManhattan Associates
- MARMarriott International
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Datasets
Frequently Asked Questions
How much of OSS is sold short?
4,481,515 shares were held short at the 2026-09-30 settlement, 7.0 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 OSS's daily short volume?
On 2026-10-22, 257,366 of the 455,486 OSS shares reported to FINRA were sold short, 56.5% of the day's reported volume. Short volume is a flow for one day, not a position.
Does OSS have fails to deliver?
The SEC's latest file shows 5,346 OSS shares failed to deliver at settlement 2026-09-21. Fails are reported per settlement date and published twice a month with a lag.
Are OSS insiders buying or selling?
No open-market insider trades were reported for OSS in the last 90 days. The most recent filings are listed below. Latest filing: KNOWLES MICHAEL (Chief Executive Officer) on 2026-08-15.
Have OSS insiders filed to sell?
3 Form 144 notices on file for OSS worth $369K at the prices reported; 0 in the last 90 days worth $0. Latest: Matz Gregory W filed on 2026-05-26 to sell 8,000 shares ($138K) from 2026-05-26.
Who owns 5% or more of OSS?
3 holders report 5% or more of OSS in their latest filing, all on Schedule 13G (passive). The largest reported stake is BlackRock, Inc. at 7.4% of the class (1,833,734 shares), filed 2026-07-29 for an event on 2026-06-30.
Which tracked 13F managers own OSS?
4 of the 30 tracked 13F managers held OSS shares at their latest filing, $17.8M in all. The largest: Renaissance Technologies (408K shares, $7.4M), Izzy Englander's Millennium Management (338K shares, $6.1M), Two Sigma Investments (162K shares, $2.9M), Ken Griffin's Citadel Advisors (71K shares, $1.3M).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.