PDF Solutions (PDFS)
PDF Solutions 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 services-prepackaged software.
3.3M
Short interest
settlement 2026-10-15
5.7
Days to cover
-0.2 days vs prior
71.2%
Short share of volume
2026-11-03
29
Fails to deliver
settlement 2026-10-13
Thu 5 Nov
Next earnings
estimated date
-$228K
Insider flow, 90 days
0 buys, 2 sells
As of 2026-11-03.
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 PDFS is 3,310,252 shares, up 61,436 shares over the last month. Over the last 48 readings it ranged from 573,264 shares (28 February 2025) to 3,541,446 shares (30 September 2026). The latest reading sits at the top of that range. At the reported average volume of 586K shares a day that is 5.7 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 3,310,252 | -6.5% | 586,373 | 5.65 |
| 2026-09-30 | 3,541,446 | +9.0% | 609,376 | 5.81 |
| 2026-09-15 | 3,248,816 | +6.0% | 568,848 | 5.71 |
| 2026-08-31 | 3,066,316 | +25.9% | 694,838 | 4.41 |
| 2026-08-14 | 2,435,684 | +2.4% | 495,884 | 4.91 |
| 2026-07-31 | 2,377,838 | -8.0% | 512,477 | 4.64 |
| 2026-07-15 | 2,583,493 | +19.3% | 662,905 | 3.90 |
| 2026-06-30 | 2,166,315 | -2.5% | 826,576 | 2.62 |
| 2026-06-15 | 2,220,874 | +28.3% | 862,244 | 2.58 |
| 2026-05-29 | 1,730,757 | -1.4% | 663,505 | 2.61 |
| 2026-05-15 | 1,755,337 | -7.8% | 1,223,790 | 1.43 |
| 2026-04-30 | 1,903,669 | +11.1% | 575,389 | 3.31 |
| 2026-04-15 | 1,713,003 | -8.9% | 341,209 | 5.02 |
| 2026-03-31 | 1,880,406 | +5.2% | 367,981 | 5.11 |
| 2026-03-13 | 1,786,751 | +1.7% | 287,216 | 6.22 |
| 2026-02-27 | 1,756,410 | -2.2% | 290,458 | 6.05 |
| 2026-02-13 | 1,796,587 | +6.7% | 351,048 | 5.12 |
| 2026-01-30 | 1,684,324 | -5.9% | 290,748 | 5.79 |
| 2026-01-15 | 1,790,181 | +8.1% | 302,878 | 5.91 |
| 2025-12-31 | 1,655,488 | +6.5% | 223,081 | 7.42 |
| 2025-12-15 | 1,554,868 | +13.0% | 294,616 | 5.28 |
| 2025-11-28 | 1,375,605 | +1.0% | 291,876 | 4.71 |
| 2025-11-14 | 1,361,406 | +2.4% | 326,197 | 4.17 |
| 2025-10-31 | 1,329,816 | -3.0% | 205,112 | 6.48 |
| 2025-10-15 | 1,371,611 | +3.4% | 240,793 | 5.70 |
| 2025-09-30 | 1,326,113 | +0.7% | 426,699 | 3.11 |
| 2025-09-15 | 1,316,974 | +3.7% | 223,256 | 5.90 |
| 2025-08-29 | 1,270,456 | -8.5% | 285,529 | 4.45 |
| 2025-08-15 | 1,389,016 | +8.9% | 369,712 | 3.76 |
| 2025-07-31 | 1,275,960 | +4.0% | 228,644 | 5.58 |
| 2025-07-15 | 1,226,903 | +22.1% | 300,785 | 4.08 |
| 2025-06-30 | 1,004,798 | +23.6% | 282,019 | 3.56 |
| 2025-06-13 | 813,238 | +14.3% | 192,938 | 4.22 |
| 2025-05-30 | 711,650 | +0.8% | 193,337 | 3.68 |
| 2025-05-15 | 705,958 | +6.5% | 246,846 | 2.86 |
| 2025-04-30 | 662,951 | +2.6% | 200,028 | 3.31 |
| 2025-04-15 | 645,897 | +2.9% | 288,075 | 2.24 |
| 2025-03-31 | 627,531 | -4.3% | 256,571 | 2.45 |
| 2025-03-14 | 655,682 | +14.4% | 223,422 | 2.93 |
| 2025-02-28 | 573,264 | -0.7% | 350,782 | 1.63 |
| 2025-02-14 | 577,238 | -0.7% | 207,613 | 2.78 |
| 2025-01-31 | 581,255 | -7.7% | 250,900 | 2.32 |
| 2025-01-15 | 629,836 | +1.9% | 149,735 | 4.21 |
| 2024-12-31 | 618,328 | -11.9% | 181,515 | 3.41 |
| 2024-12-13 | 701,638 | -7.4% | 123,864 | 5.66 |
| 2024-11-29 | 757,534 | +0.7% | 139,844 | 5.42 |
| 2024-11-15 | 752,632 | -7.0% | 215,703 | 3.49 |
| 2024-10-31 | 809,360 | +11.5% | 114,857 | 7.05 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 3 November 2026, the short share of PDFS volume is 71.2%, down 2.2 points over the last five sessions. Over the last 30 readings it ranged from 42.4% (14 October 2026) to 89.7% (6 October 2026). The latest reading is in line with the 30-session average of 71.4%, on 262K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-03 | 187K | 262K | 71.2% | 0 |
| 2026-11-02 | 121K | 242K | 49.9% | 9,633 |
| 2026-10-30 | 286K | 395K | 72.6% | 1,846 |
| 2026-10-29 | 170K | 226K | 75.2% | 0 |
| 2026-10-28 | 110K | 177K | 62.1% | 0 |
| 2026-10-27 | 131K | 179K | 73.4% | 0 |
| 2026-10-26 | 109K | 152K | 71.7% | 0 |
| 2026-10-23 | 96K | 171K | 56.5% | 2,110 |
| 2026-10-22 | 172K | 273K | 62.9% | 2,315 |
| 2026-10-21 | 173K | 210K | 82.2% | 0 |
| 2026-10-20 | 149K | 194K | 76.5% | 228 |
| 2026-10-19 | 149K | 193K | 77.3% | 0 |
| 2026-10-16 | 144K | 171K | 84.4% | 0 |
| 2026-10-15 | 221K | 319K | 69.3% | 2,732 |
| 2026-10-14 | 88K | 208K | 42.4% | 2,158 |
| 2026-10-13 | 193K | 414K | 46.6% | 2,233 |
| 2026-10-12 | 192K | 248K | 77.1% | 36 |
| 2026-10-09 | 153K | 191K | 79.9% | 0 |
| 2026-10-08 | 156K | 193K | 80.6% | 0 |
| 2026-10-07 | 100K | 122K | 81.8% | 0 |
| 2026-10-06 | 230K | 257K | 89.7% | 0 |
| 2026-10-05 | 165K | 196K | 83.9% | 0 |
| 2026-10-02 | 127K | 152K | 83.4% | 5 |
| 2026-10-01 | 166K | 215K | 77.3% | 0 |
| 2026-09-30 | 233K | 369K | 63.2% | 11,790 |
| 2026-09-29 | 144K | 249K | 57.8% | 142 |
| 2026-09-28 | 125K | 166K | 75.5% | 0 |
| 2026-09-25 | 110K | 143K | 76.8% | 0 |
| 2026-09-24 | 144K | 231K | 62.3% | 0 |
| 2026-09-23 | 129K | 166K | 77.6% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 13 October 2026, the fails-to-deliver balance in PDFS is 29 shares, up 28 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (30 September 2026) to 18,805 shares (6 July 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-10-13 | 29 | $52.69 | $2K |
| 2026-09-30 | 1 | $49.77 | $50 |
| 2026-09-09 | 380 | $47.84 | $18K |
| 2026-08-28 | 1,104 | $46.15 | $51K |
| 2026-08-27 | 1,107 | $44.93 | $50K |
| 2026-08-26 | 94 | $44.28 | $4K |
| 2026-08-24 | 3,310 | $45.65 | $151K |
| 2026-08-14 | 184 | $50.35 | $9K |
| 2026-08-11 | 51 | $47.63 | $2K |
| 2026-08-10 | 206 | $49.45 | $10K |
| 2026-07-28 | 53 | $47.72 | $3K |
| 2026-07-20 | 195 | $51.14 | $10K |
| 2026-07-17 | 27 | $51.93 | $1K |
| 2026-07-16 | 12 | $53.43 | $641 |
| 2026-07-13 | 699 | $55.52 | $39K |
| 2026-07-10 | 18 | $55.93 | $1K |
| 2026-07-08 | 407 | $51.63 | $21K |
| 2026-07-06 | 18,805 | $59.18 | $1.1M |
| 2026-07-02 | 2,939 | $66.88 | $197K |
| 2026-06-29 | 619 | $63.01 | $39K |
| 2026-06-25 | 263 | $63.56 | $17K |
| 2026-06-23 | 29 | $64.95 | $2K |
| 2026-06-10 | 452 | $58.74 | $27K |
| 2026-06-08 | 894 | $51.45 | $46K |
| 2026-06-02 | 639 | $51.28 | $33K |
| 2026-05-28 | 3,260 | $47.60 | $155K |
| 2026-05-27 | 10,294 | $48.95 | $504K |
| 2026-05-26 | 15,692 | $46.09 | $723K |
| 2026-05-18 | 546 | $44.70 | $24K |
| 2026-05-07 | 1,996 | $48.09 | $96K |
Insider trades
SEC Form 4, newest first. JSONInsiders at PDFS reported 2 open-market sells worth $228K in the last 90 days and no open-market buys. Latest filing: Strojwas Andrzej (Chief Technology Officer) on 2026-08-31.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-08-31 | Strojwas Andrzej | Chief Technology Officer | Sell | 3K | $44.41 | $151K | 91K |
| 2026-08-12 | Zhang Shuo | Director | Sell | 2K | $51.47 | $77K | 23K |
| 2026-07-01 | Strojwas Andrzej | Chief Technology Officer | Grant | 5K | price not stated in the filing | not stated | 94K |
| 2026-07-01 | Strojwas Andrzej | Chief Technology Officer | Tax withholding | 1K | $66.88 | $91K | 89K |
| 2026-07-01 | Zhang Shuo | Director | Grant | 3K | price not stated in the filing | not stated | 25K |
| 2026-07-01 | Raza Adnan | EVP, Finance and CFO | Grant | 23K | price not stated in the filing | not stated | 81K |
| 2026-07-01 | Raza Adnan | EVP, Finance and CFO | Tax withholding | 6K | $66.88 | $402K | 65K |
| 2026-07-01 | Li Ye Jane | Director | Grant | 3K | price not stated in the filing | not stated | 27K |
| 2026-07-01 | GUSTAFSON MICHAEL B | Director | Grant | 3K | price not stated in the filing | not stated | 40K |
| 2026-07-01 | Erba Nancy | Director | Grant | 3K | price not stated in the filing | not stated | 12K |
| 2026-07-01 | CHAN CHI-FOON | Director | Grant | 3K | price not stated in the filing | not stated | 24K |
| 2026-07-01 | BRONSON JOSEPH R | Director | Grant | 3K | price not stated in the filing | not stated | 41K |
| 2026-01-01 | Strojwas Andrzej | Chief Technology Officer | Tax withholding | 3K | $28.53 | $79K | 89K |
| 2026-01-01 | Raza Adnan | EVP, Finance and CFO | Tax withholding | 5K | $28.53 | $157K | 71K |
| 2025-12-09 | MICHAELS KIMON | EVP of Products and Solutions | Gift | 5K | $0.00 | $0 | 1.5M |
| 2025-08-01 | Strojwas Andrzej | Chief Technology Officer | Grant | 8K | price not stated in the filing | not stated | 92K |
| 2025-08-01 | Raza Adnan | EVP, Finance and CFO | Grant | 35K | price not stated in the filing | not stated | 77K |
| 2025-07-01 | Zhang Shuo | Director | Grant | 7K | price not stated in the filing | not stated | 22K |
| 2025-07-01 | Li Ye Jane | Director | Grant | 7K | price not stated in the filing | not stated | 24K |
| 2025-07-01 | GUSTAFSON MICHAEL B | Director | Grant | 7K | price not stated in the filing | not stated | 38K |
| 2025-07-01 | Erba Nancy | Director | Grant | 7K | price not stated in the filing | not stated | 27K |
| 2025-07-01 | CHAN CHI-FOON | Director | Grant | 7K | price not stated in the filing | not stated | 21K |
| 2025-07-01 | BRONSON JOSEPH R | Director | Grant | 7K | price not stated in the filing | not stated | 38K |
| 2025-07-01 | Raza Adnan | EVP, Finance and CFO | Tax withholding | 5K | $21.87 | $108K | 64K |
| 2025-07-01 | Strojwas Andrzej | Chief Technology Officer | Tax withholding | 2K | $21.87 | $55K | 84K |
| 2025-07-01 | MICHAELS KIMON | EVP of Products and Solutions | Tax withholding | 798 | $21.87 | $17K | 28K |
| 2025-05-13 | GUSTAFSON MICHAEL B | Director | Buy | 8K | $19.45 | $146K | 30K |
| 2025-02-25 | KIBARIAN JOHN KACHIG | PRESIDENT AND CEO | Buy | 16K | $22.11 | $346K | 2.5M |
| 2025-02-24 | KIBARIAN JOHN KACHIG | PRESIDENT AND CEO | Buy | 34K | $22.80 | $783K | 2.5M |
| 2025-02-24 | GUSTAFSON MICHAEL B | Director | Buy | 4K | $23.06 | $92K | 23K |
| 2025-01-01 | Strojwas Andrzej | CTO | Tax withholding | 3K | price not stated in the filing | not stated | 86K |
| 2025-01-01 | Raza Adnan | EVP, FINANCE AND CFO | Tax withholding | 5K | price not stated in the filing | not stated | 68K |
| 2025-01-01 | MICHAELS KIMON | EVP OF PRODUCTS AND SOLUTIONS | Tax withholding | 870 | price not stated in the filing | not stated | 33K |
| 2024-12-17 | Strojwas Andrzej | CTO | Sell | 6K | $30.36 | $182K | 88K |
| 2024-12-17 | Strojwas Andrzej | CTO | Sell | 245 | $31.17 | $8K | 94K |
| 2024-12-16 | Strojwas Andrzej | CTO | Sell | 5K | $30.85 | $155K | 95K |
| 2024-12-11 | Erba Nancy | Director | Sell | 2K | $30.81 | $62K | 14K |
| 2024-08-01 | Strojwas Andrzej | CTO | Tax withholding | 357 | $33.13 | $12K | 100K |
| 2024-08-01 | MICHAELS KIMON | EVP OF PRODUCTS AND SOLUTIONS | Tax withholding | 22 | $33.13 | $729 | 34K |
| 2024-07-01 | CHAN CHI-FOON | Director | Grant | 4K | price not stated in the filing | not stated | 14K |
| 2024-07-01 | BRONSON JOSEPH R | Director | Grant | 4K | price not stated in the filing | not stated | 31K |
| 2024-07-01 | GUSTAFSON MICHAEL B | Director | Grant | 4K | price not stated in the filing | not stated | 19K |
| 2024-07-01 | Zhang Shuo | Director | Grant | 4K | price not stated in the filing | not stated | 15K |
| 2024-07-01 | MICHAELS KIMON | EVP OF PRODUCTS AND SOLUTIONS | Tax withholding | 657 | $35.74 | $23K | 34K |
| 2024-07-01 | MICHAELS KIMON | EVP OF PRODUCTS AND SOLUTIONS | Grant | 2K | price not stated in the filing | not stated | 35K |
| 2024-07-01 | Strojwas Andrzej | CTO | Tax withholding | 3K | $35.74 | $96K | 100K |
| 2024-07-01 | Strojwas Andrzej | CTO | Grant | 10K | price not stated in the filing | not stated | 102K |
| 2024-07-01 | Raza Adnan | EVP, FINANCE AND CFO | Tax withholding | 5K | $35.74 | $177K | 73K |
| 2024-07-01 | Raza Adnan | EVP, FINANCE AND CFO | Grant | 30K | price not stated in the filing | not stated | 78K |
| 2024-07-01 | Li Ye Jane | Director | Grant | 4K | price not stated in the filing | not stated | 17K |
| 2024-07-01 | Erba Nancy | Director | Grant | 4K | price not stated in the filing | not stated | 20K |
| 2024-06-03 | Zhang Shuo | Director | Sell | 6K | $34.66 | $191K | 10K |
| 2024-05-17 | Raza Adnan | EVP, FINANCE AND CFO | Sell | 10K | $33.95 | $328K | 48K |
| 2024-05-16 | Raza Adnan | EVP, FINANCE AND CFO | Sell | 17K | $33.82 | $558K | 58K |
| 2024-05-15 | Raza Adnan | EVP, FINANCE AND CFO | Sell | 1K | $34.52 | $46K | 74K |
| 2024-02-26 | Li Ye Jane | Director | Sell | 10K | $33.27 | $321K | 12K |
| 2024-02-23 | Li Ye Jane | Director | Sell | 2K | $34.00 | $52K | 22K |
| 2024-02-21 | BRONSON JOSEPH R | Director | Sell | 15K | $34.63 | $519K | 26K |
| 2024-02-01 | Strojwas Andrzej | CTO | Tax withholding | 357 | $31.69 | $11K | 92K |
| 2024-02-01 | Raza Adnan | EVP, FINANCE AND CFO | Tax withholding | 5K | $31.69 | $170K | 76K |
| 2024-01-01 | Raza Adnan | EVP, FINANCE AND CFO | Tax withholding | 4K | $32.14 | $123K | 81K |
| 2024-01-01 | Strojwas Andrzej | CTO | Tax withholding | 2K | $32.14 | $77K | 92K |
| 2024-01-01 | MICHAELS KIMON | EVP OF PRODUCTS AND SOLUTIONS | Tax withholding | 745 | $32.14 | $24K | 33K |
| 2024-01-01 | CHAN CHI-FOON | Director | Grant | 10K | price not stated in the filing | not stated | 10K |
| 2024-01-01 | MICHAELS KIMON | EVP OF PRODUCTS AND SOLUTIONS | Tax withholding | 25 | $31.69 | $792 | 33K |
| 2023-12-13 | GUSTAFSON MICHAEL B | Director | Sell | 5K | $30.86 | $151K | 14K |
| 2023-12-12 | GUSTAFSON MICHAEL B | Director | Sell | 867 | $31.29 | $27K | 19K |
| 2023-12-05 | MICHAELS KIMON | EVP OF PRODUCTS AND SOLUTIONS | Gift | 2K | $0.00 | $0 | 1.6M |
| 2023-11-29 | Erba Nancy | Director | Sell | 2K | $30.57 | $55K | 16K |
| 2023-11-27 | MICHAELS KIMON | EVP OF PRODUCTS AND SOLUTIONS | Gift | 2K | $0.00 | $0 | 1.6M |
| 2023-11-16 | MICHAELS KIMON | EVP OF PRODUCTS AND SOLUTIONS | Gift | 5K | $0.00 | $0 | 1.6M |
| 2023-08-18 | Zhang Shuo | Director | Sell | 3K | $33.75 | $103K | 16K |
| 2023-08-01 | Strojwas Andrzej | CTO | Tax withholding | 357 | $45.83 | $16K | 95K |
| 2023-08-01 | Raza Adnan | EVP, FINANCE AND CFO | Tax withholding | 7K | $45.83 | $341K | 84K |
| 2023-08-01 | MICHAELS KIMON | EVP OF PRODUCTS AND SOLUTIONS | Tax withholding | 22 | $45.83 | $1K | 33K |
| 2023-07-01 | GUSTAFSON MICHAEL B | Director | Grant | 3K | price not stated in the filing | not stated | 20K |
| 2023-07-01 | Erba Nancy | Director | Grant | 3K | price not stated in the filing | not stated | 33K |
| 2023-07-01 | BRONSON JOSEPH R | Director | Grant | 3K | price not stated in the filing | not stated | 41K |
| 2023-07-01 | Zhang Shuo | Director | Grant | 3K | price not stated in the filing | not stated | 19K |
| 2023-07-01 | Li Ye Jane | Director | Grant | 3K | price not stated in the filing | not stated | 23K |
| 2023-07-01 | Raza Adnan | EVP, FINANCE AND CFO | Tax withholding | 3K | $45.10 | $152K | 92K |
| 2023-07-01 | MICHAELS KIMON | EVP OF PRODUCTS AND SOLUTIONS | Grant | 3K | price not stated in the filing | not stated | 34K |
| 2023-07-01 | MICHAELS KIMON | EVP OF PRODUCTS AND SOLUTIONS | Tax withholding | 597 | $45.10 | $27K | 33K |
| 2023-07-01 | Strojwas Andrzej | CTO | Grant | 10K | price not stated in the filing | not stated | 96K |
| 2023-07-01 | Strojwas Andrzej | CTO | Tax withholding | 2K | $45.10 | $97K | 94K |
| 2023-05-30 | Strojwas Andrzej | CTO | Gift | 1K | $0.00 | $0 | 86K |
| 2023-03-08 | Strojwas Andrzej | CTO | Sell | 3K | $38.45 | $97K | 87K |
| 2023-03-03 | Raza Adnan | EVP, FINANCE AND CFO | Grant | 20K | price not stated in the filing | not stated | 95K |
| 2023-03-03 | Raza Adnan | EVP, FINANCE AND CFO | Sell | 16K | $37.64 | $585K | 75K |
| 2023-02-28 | GUSTAFSON MICHAEL B | Director | Sell | 13K | $37.26 | $496K | 17K |
| 2023-02-22 | BRONSON JOSEPH R | Director | Sell | 13K | $36.47 | $456K | 38K |
| 2023-02-01 | Strojwas Andrzej | CTO | Tax withholding | 357 | $32.65 | $12K | 90K |
| 2023-02-01 | Raza Adnan | EVP, FINANCE AND CFO | Tax withholding | 5K | $32.65 | $169K | 91K |
| 2023-02-01 | MICHAELS KIMON | EVP OF PRODUCTS AND SOLUTIONS | Tax withholding | 25 | $32.65 | $816 | 31K |
| 2023-01-01 | Raza Adnan | EVP, FINANCE AND CFO | Tax withholding | 3K | $28.52 | $84K | 95K |
| 2023-01-01 | MICHAELS KIMON | EVP OF PRODUCTS AND SOLUTIONS | Tax withholding | 712 | $28.52 | $20K | 129K |
| 2023-01-01 | Strojwas Andrzej | CTO | Tax withholding | 2K | $28.52 | $69K | 91K |
| 2022-11-30 | Strojwas Andrzej | CTO | Sell | 20K | $31.00 | $618K | 93K |
| 2022-11-29 | Raza Adnan | EVP, FINANCE AND CFO | Sell | 9K | $30.13 | $278K | 98K |
| 2022-11-25 | Raza Adnan | EVP, FINANCE AND CFO | Sell | 3K | $30.50 | $92K | 107K |
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. JSON2 Form 144 notices on file for PDFS worth $228K at the prices reported; 2 in the last 90 days worth $228K. Latest: ANDRZEJ STROJWAS filed on 2026-08-31 to sell 3,394 shares ($151K) from 2026-08-31.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-08-31 | ANDRZEJ STROJWASOfficer | 3K | $151K | 0.008% | 2026-08-31 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-12 | SHUO ZHANGDirector | 2K | $77K | 0.004% | 2026-08-12 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON5 holders report 5% or more of PDFS in their latest filing, all on Schedule 13G (passive). The largest reported stake is KIBARIAN JOHN KACHIG at 6.5% of the class (2,562,474 shares), filed 2026-02-17 for an event on 2025-12-31.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-10-09 | 13G | Wasatch Advisors LPinvestment adviser | 2.6M | 6.3% | 2026-09-30 |
| 2026-05-27 | 13G/Ano. 1 | Advantest Corporationcorporation | 0 | 0.0% | 2026-05-15 |
| 2026-05-27 | 13G/Ano. 1 | Advantest America, Inc.corporation | 0 | 0.0% | 2026-05-15 |
| 2026-05-14 | 13G | Needham Investment Management L.L.C.investment adviser, other entity | 2.0M | 5.1% | 2026-03-31 |
| 2026-05-14 | 13G | George A. Needhamparent holding company, individual | 2.0M | 5.1% | 2026-03-31 |
| 2026-05-14 | 13G | Needham Asset Management, LLCparent holding company, other entity | 2.0M | 5.1% | 2026-03-31 |
| 2026-03-27 | 13G/Ano. 6 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-02-17 | 13G/Ano. 21 | KIBARIAN JOHN KACHIGindividual | 2.6M | 6.5% | 2025-12-31 |
| 2026-02-13 | 13G/Ano. 1 | NEEDHAM AGGRESSIVE GROWTH FUNDinvestment company, other entity | 1.5M | 3.7% | 2025-12-31 |
| 2026-02-13 | 13G/Ano. 1 | NEEDHAM GROWTH FUNDinvestment company, other entity | 270K | 0.7% | 2025-12-31 |
| 2026-02-13 | 13G/Ano. 1 | NEEDHAM SMALL CAP GROWTH FUNDinvestment company, other entity | 230K | 0.6% | 2025-12-31 |
13F holders
Tracked managers holding PDFS at their latest 13F. JSON7 of the 30 tracked managers held PDFS at their latest 13F, $57.8M in total at quarter-end prices. Point72 Asset Management is the largest at $42.4M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 5 added shares and 2 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Point72 Asset Management | 2026-06-30 | 599K | $42.4M | 0.05% | new |
| Citadel Advisors | 2026-06-30 | 84K | $6.0M | 0.00% | +50K |
| Millennium Management | 2026-06-30 | 46K | $3.3M | 0.00% | new |
| AQR Capital Management | 2026-06-30 | 46K | $3.2M | 0.00% | -3K |
| Fisher Asset Management | 2026-06-30 | 31K | $2.2M | 0.00% | -21K |
| Two Sigma Investments | 2026-06-30 | 6K | $396K | 0.00% | new |
| Bridgewater Associates | 2026-06-30 | 5K | $340K | 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
PDF Solutions 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 PDF Solutions (PDFS), SEC CIK 1120914, listed on Nasdaq, classified by the SEC as services-prepackaged software. 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 2026-11-03.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-10-13.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 2026-08-31.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 2026-08-06.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 2026-08-31.JSON and CSV
- Company record
- EDGAR filing index for CIK 1120914Ticker, 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 services-prepackaged software
Other company pages
Datasets
Frequently Asked Questions
How much of PDFS is sold short?
3,310,252 shares were held short at the 2026-10-15 settlement, 5.7 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 PDFS's daily short volume?
On 2026-11-03, 186,763 of the 262,446 PDFS shares reported to FINRA were sold short, 71.2% of the day's reported volume. Short volume is a flow for one day, not a position.
Does PDFS have fails to deliver?
The SEC's latest file shows 29 PDFS shares failed to deliver at settlement 2026-10-13. Fails are reported per settlement date and published twice a month with a lag.
Are PDFS insiders buying or selling?
Insiders at PDFS reported 2 open-market sells worth $228K in the last 90 days and no open-market buys. Latest filing: Strojwas Andrzej (Chief Technology Officer) on 2026-08-31.
Have PDFS insiders filed to sell?
2 Form 144 notices on file for PDFS worth $228K at the prices reported; 2 in the last 90 days worth $228K. Latest: ANDRZEJ STROJWAS filed on 2026-08-31 to sell 3,394 shares ($151K) from 2026-08-31.
Who owns 5% or more of PDFS?
5 holders report 5% or more of PDFS in their latest filing, all on Schedule 13G (passive). The largest reported stake is KIBARIAN JOHN KACHIG at 6.5% of the class (2,562,474 shares), filed 2026-02-17 for an event on 2025-12-31.
Which tracked 13F managers own PDFS?
7 of the 30 tracked 13F managers held PDFS shares at their latest filing, $57.8M in all. The largest: Steve Cohen's Point72 Asset Management (599K shares, $42.4M), Ken Griffin's Citadel Advisors (84K shares, $6.0M), Izzy Englander's Millennium Management (46K shares, $3.3M), Cliff Asness's AQR Capital Management (46K shares, $3.2M), Ken Fisher's Fisher Asset Management (31K shares, $2.2M), Two Sigma Investments (6K shares, $396K). The table above lists all 7.
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.