Personalis (PSNL)
Personalis on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as services-medical laboratories.
6.8M
Short interest
settlement 2026-10-15
2.6
Days to cover
-1.7 days vs prior
29.6%
Short share of volume
2026-11-03
1,805
Fails to deliver
settlement 2026-10-07
Thu 7 Jan
Next earnings
estimated date
-$267K
Insider flow, 90 days
0 buys, 4 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 PSNL is 6,793,284 shares, down 1,472,909 shares over the last month. Over the last 48 readings it ranged from 2,851,636 shares (15 November 2024) to 13,734,814 shares (15 May 2026). At the reported average volume of 2.6M shares a day that is 2.6 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 6,793,284 | -19.4% | 2,574,625 | 2.64 |
| 2026-09-30 | 8,427,731 | +1.9% | 1,947,012 | 4.33 |
| 2026-09-15 | 8,266,193 | -1.4% | 2,328,040 | 3.55 |
| 2026-08-31 | 8,384,040 | -0.2% | 4,666,604 | 1.80 |
| 2026-08-14 | 8,398,426 | -3.6% | 2,328,492 | 3.61 |
| 2026-07-31 | 8,714,008 | -21.5% | 5,145,469 | 1.69 |
| 2026-07-15 | 11,097,287 | -1.9% | 4,751,358 | 2.34 |
| 2026-06-30 | 11,306,678 | +1.8% | 4,074,084 | 2.78 |
| 2026-06-15 | 11,104,630 | -13.4% | 3,086,400 | 3.60 |
| 2026-05-29 | 12,825,386 | -6.6% | 2,984,403 | 4.30 |
| 2026-05-15 | 13,734,814 | +4.8% | 2,434,028 | 5.64 |
| 2026-04-30 | 13,104,403 | +5.7% | 2,257,546 | 5.80 |
| 2026-04-15 | 12,394,050 | +5.4% | 1,306,973 | 9.48 |
| 2026-03-31 | 11,755,231 | +5.3% | 1,588,333 | 7.40 |
| 2026-03-13 | 11,167,937 | -0.3% | 1,736,312 | 6.43 |
| 2026-02-27 | 11,206,564 | +4.9% | 1,281,319 | 8.75 |
| 2026-02-13 | 10,685,978 | +21.3% | 1,248,699 | 8.56 |
| 2026-01-30 | 8,813,216 | +0.9% | 1,516,105 | 5.81 |
| 2026-01-15 | 8,735,238 | +6.4% | 1,166,031 | 7.49 |
| 2025-12-31 | 8,208,568 | +0.3% | 1,345,157 | 6.10 |
| 2025-12-15 | 8,180,125 | +5.2% | 1,457,925 | 5.61 |
| 2025-11-28 | 7,773,493 | +0.5% | 1,725,309 | 4.51 |
| 2025-11-14 | 7,736,272 | +10.3% | 1,913,896 | 4.04 |
| 2025-10-31 | 7,014,430 | -8.5% | 1,392,097 | 5.04 |
| 2025-10-15 | 7,666,934 | -7.8% | 1,050,253 | 7.30 |
| 2025-09-30 | 8,317,714 | +10.2% | 855,804 | 9.72 |
| 2025-09-15 | 7,549,472 | -7.3% | 904,219 | 8.35 |
| 2025-08-29 | 8,146,585 | +8.2% | 803,090 | 10.14 |
| 2025-08-15 | 7,526,460 | +4.8% | 1,263,134 | 5.96 |
| 2025-07-31 | 7,180,342 | +4.8% | 880,224 | 8.16 |
| 2025-07-15 | 6,848,626 | +11.6% | 1,439,730 | 4.76 |
| 2025-06-30 | 6,137,113 | +58.9% | 2,247,537 | 2.73 |
| 2025-06-13 | 3,862,297 | -0.3% | 908,920 | 4.25 |
| 2025-05-30 | 3,875,344 | -8.9% | 519,676 | 7.46 |
| 2025-05-15 | 4,252,203 | +10.1% | 903,815 | 4.70 |
| 2025-04-30 | 3,861,028 | -12.4% | 573,493 | 6.73 |
| 2025-04-15 | 4,409,569 | +1.7% | 695,463 | 6.34 |
| 2025-03-31 | 4,337,239 | +0.0% | 807,595 | 5.37 |
| 2025-03-14 | 4,336,671 | +14.8% | 1,142,697 | 3.80 |
| 2025-02-28 | 3,777,329 | -2.6% | 1,312,591 | 2.88 |
| 2025-02-14 | 3,876,937 | +9.9% | 985,152 | 3.94 |
| 2025-01-31 | 3,527,599 | +0.4% | 1,296,799 | 2.72 |
| 2025-01-15 | 3,513,322 | +6.2% | 1,010,822 | 3.48 |
| 2024-12-31 | 3,307,917 | +11.3% | 1,968,942 | 1.68 |
| 2024-12-13 | 2,971,527 | -1.6% | 512,088 | 5.80 |
| 2024-11-29 | 3,020,165 | +5.9% | 732,795 | 4.12 |
| 2024-11-15 | 2,851,636 | -11.9% | 1,167,428 | 2.44 |
| 2024-10-31 | 3,235,603 | +3.8% | 419,370 | 7.72 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 3 November 2026, the short share of PSNL volume is 29.6%, down 32.8 points over the last five sessions. Over the last 30 readings it ranged from 22.1% (13 October 2026) to 73.5% (22 October 2026). The latest reading is 14.9 points below the 30-session average of 44.5%, on 1.2M shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-03 | 363K | 1.2M | 29.6% | 233 |
| 2026-11-02 | 313K | 819K | 38.3% | 769 |
| 2026-10-30 | 624K | 897K | 69.5% | 215 |
| 2026-10-29 | 159K | 262K | 60.8% | 0 |
| 2026-10-28 | 264K | 435K | 60.6% | 0 |
| 2026-10-27 | 404K | 648K | 62.4% | 0 |
| 2026-10-26 | 129K | 237K | 54.4% | 315 |
| 2026-10-23 | 179K | 331K | 54.0% | 273 |
| 2026-10-22 | 705K | 959K | 73.5% | 0 |
| 2026-10-21 | 561K | 1.1M | 53.0% | 0 |
| 2026-10-20 | 542K | 1.0M | 51.6% | 0 |
| 2026-10-19 | 653K | 1.5M | 44.0% | 1,400 |
| 2026-10-16 | 588K | 1.6M | 36.5% | 199 |
| 2026-10-15 | 325K | 864K | 37.6% | 2,111 |
| 2026-10-14 | 473K | 1.6M | 29.2% | 600 |
| 2026-10-13 | 436K | 2.0M | 22.1% | 0 |
| 2026-10-12 | 279K | 1.2M | 22.7% | 0 |
| 2026-10-09 | 156K | 671K | 23.3% | 0 |
| 2026-10-08 | 265K | 557K | 47.6% | 0 |
| 2026-10-07 | 700K | 1.7M | 40.6% | 7,290 |
| 2026-10-06 | 874K | 3.4M | 26.0% | 318 |
| 2026-10-05 | 106K | 266K | 39.7% | 0 |
| 2026-10-02 | 265K | 444K | 59.7% | 100 |
| 2026-10-01 | 266K | 693K | 38.3% | 0 |
| 2026-09-30 | 81K | 214K | 37.8% | 0 |
| 2026-09-29 | 145K | 339K | 42.8% | 0 |
| 2026-09-28 | 158K | 411K | 38.3% | 40,360 |
| 2026-09-25 | 124K | 275K | 45.2% | 3,400 |
| 2026-09-24 | 238K | 568K | 41.9% | 5 |
| 2026-09-23 | 196K | 362K | 54.2% | 8,913 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 7 October 2026, the fails-to-deliver balance in PSNL is 1,805 shares, down 50,469 shares over the last settlement date. Over the last 30 readings it ranged from 18 shares (25 August 2026) to 519,585 shares (22 July 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-10-07 | 1,805 | $16.03 | $29K |
| 2026-10-05 | 52,274 | $16.28 | $851K |
| 2026-09-30 | 3,003 | $16.35 | $49K |
| 2026-09-23 | 3,560 | $16.36 | $58K |
| 2026-09-18 | 737 | $16.23 | $12K |
| 2026-09-08 | 134,956 | $17.20 | $2.3M |
| 2026-08-31 | 300 | $17.07 | $5K |
| 2026-08-25 | 18 | $17.06 | $307 |
| 2026-08-12 | 107,359 | $14.02 | $1.5M |
| 2026-08-06 | 1,178 | $13.52 | $16K |
| 2026-08-04 | 74,598 | $13.20 | $985K |
| 2026-08-03 | 78,408 | $12.66 | $993K |
| 2026-07-22 | 519,585 | $13.44 | $7.0M |
| 2026-07-17 | 496 | $15.58 | $8K |
| 2026-07-16 | 4,850 | $15.79 | $77K |
| 2026-07-14 | 1,934 | $15.04 | $29K |
| 2026-07-08 | 367 | $13.98 | $5K |
| 2026-07-07 | 10,378 | $14.34 | $149K |
| 2026-07-01 | 757 | $13.40 | $10K |
| 2026-06-30 | 25,614 | $13.75 | $352K |
| 2026-06-26 | 15,844 | $12.59 | $199K |
| 2026-06-25 | 22,178 | $11.36 | $252K |
| 2026-06-22 | 1,150 | $10.54 | $12K |
| 2026-06-17 | 13,164 | $9.69 | $128K |
| 2026-06-16 | 2,592 | $9.79 | $25K |
| 2026-06-15 | 2,910 | $9.59 | $28K |
| 2026-06-12 | 515 | $9.42 | $5K |
| 2026-06-11 | 3,424 | $9.61 | $33K |
| 2026-06-10 | 280,024 | $9.75 | $2.7M |
| 2026-06-05 | 341 | $12.10 | $4K |
Insider trades
SEC Form 4, newest first. JSONInsiders at PSNL reported 4 open-market sells worth $267K in the last 90 days and no open-market buys. Latest filing: Tachibana Aaron (CFO AND COO) on 2026-09-18.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-09-18 | Tachibana Aaron | CFO AND COO | Sell | 3K | $16.22 | $48K | 196K |
| 2026-09-18 | Moore Stephen Michael | SVP and Chief Legal Officer | Sell | 2K | $16.22 | $34K | 90K |
| 2026-09-18 | Hall Christopher M | Chief Executive Officer | Sell | 7K | $16.22 | $121K | 229K |
| 2026-09-18 | Chen Richard | President and CMO | Sell | 4K | $16.22 | $65K | 170K |
| 2026-07-15 | Chen Richard | President and CMO | Sell | 100K | $15.15 | $1.5M | 174K |
| 2026-07-15 | Chen Richard | President and CMO | Exercise or conversion | 100K | $2.44 | $244K | 274K |
| 2026-07-09 | Hall Christopher M | Chief Executive Officer | Sell | 100K | $15.08 | $1.5M | 236K |
| 2026-07-09 | Hall Christopher M | Chief Executive Officer | Exercise or conversion | 100K | $1.61 | $161K | 336K |
| 2026-06-29 | Tachibana Aaron | CFO AND COO | Exercise or conversion | 5K | $5.32 | $27K | 204K |
| 2026-06-29 | Tachibana Aaron | CFO AND COO | Sell | 5K | $14.00 | $70K | 199K |
| 2026-06-26 | Hall Christopher M | Chief Executive Officer | Sell | 100K | $13.15 | $1.3M | 236K |
| 2026-06-26 | Hall Christopher M | Chief Executive Officer | Exercise or conversion | 100K | $1.61 | $161K | 336K |
| 2026-06-26 | Tachibana Aaron | CFO AND COO | Sell | 51K | $13.18 | $675K | 199K |
| 2026-06-26 | Tachibana Aaron | CFO AND COO | Exercise or conversion | 29K | $9.16 | $264K | 228K |
| 2026-06-26 | Tachibana Aaron | CFO AND COO | Exercise or conversion | 22K | $5.32 | $119K | 250K |
| 2026-06-04 | Tachibana Aaron | CFO AND COO | Sell | 40K | $12.01 | $480K | 199K |
| 2026-06-04 | Tachibana Aaron | CFO AND COO | Exercise or conversion | 40K | $9.16 | $366K | 239K |
| 2026-05-29 | Tachibana Aaron | CFO AND COO | Sell | 39K | $11.58 | $449K | 199K |
| 2026-05-29 | Tachibana Aaron | CFO AND COO | Exercise or conversion | 39K | $9.16 | $355K | 238K |
| 2026-05-29 | Hall Christopher M | Chief Executive Officer | Sell | 80K | $11.02 | $883K | 236K |
| 2026-05-29 | Hall Christopher M | Chief Executive Officer | Exercise or conversion | 80K | $1.61 | $129K | 316K |
| 2026-05-28 | Hall Christopher M | Chief Executive Officer | Sell | 20K | $11.02 | $219K | 236K |
| 2026-05-28 | Hall Christopher M | Chief Executive Officer | Exercise or conversion | 20K | $1.61 | $32K | 256K |
| 2026-05-12 | EASTHAM KARIN | Director | Grant | 6K | $0.00 | $0 | 20K |
| 2026-05-12 | Shoff Lonnie | Director | Grant | 6K | $0.00 | $0 | 37K |
| 2026-05-12 | WIDDER KENNETH J | Director | Grant | 6K | $0.00 | $0 | 6K |
| 2026-05-12 | MYERS WOODROW A JR | Director | Grant | 6K | $0.00 | $0 | 32K |
| 2026-05-12 | EASTHAM KARIN | Director | Grant | 6K | $0.00 | $0 | 22K |
| 2026-05-12 | Bloom Olivia Kyusuk | Director | Grant | 6K | $0.00 | $0 | 27K |
| 2026-05-12 | BOWMAN A BLAINE | Director | Grant | 6K | $0.00 | $0 | 20K |
| 2026-03-15 | Tachibana Aaron | CFO AND COO | Grant | 34K | $0.00 | $0 | 199K |
| 2026-03-15 | Moore Stephen Michael | SVP and Chief Legal Officer | Grant | 28K | $0.00 | $0 | 92K |
| 2026-03-15 | Hall Christopher M | Chief Executive Officer | Grant | 88K | $0.00 | $0 | 236K |
| 2026-03-15 | Chen Richard | President and CMO | Grant | 47K | $0.00 | $0 | 174K |
| 2026-01-22 | Tachibana Aaron | CFO AND COO | Sell | 1K | $11.50 | $14K | 164K |
| 2026-01-22 | Tachibana Aaron | CFO AND COO | Exercise or conversion | 1K | $9.16 | $11K | 166K |
| 2025-12-22 | Tempus AI, Inc. | 10% owner | Buy | 28K | $8.93 | $250K | 13.0M |
| 2025-12-19 | Tempus AI, Inc. | 10% owner | Buy | 30K | $8.39 | $249K | 13.0M |
| 2025-12-18 | Tempus AI, Inc. | 10% owner | Buy | 31K | $7.91 | $249K | 13.0M |
| 2025-12-17 | Tempus AI, Inc. | 10% owner | Buy | 32K | $7.86 | $249K | 12.9M |
| 2025-11-25 | Tachibana Aaron | CFO AND COO | Sell | 104K | $10.78 | $1.1M | 164K |
| 2025-11-25 | Tachibana Aaron | CFO AND COO | Exercise or conversion | 104K | $9.16 | $950K | 268K |
| 2025-11-25 | Tempus AI, Inc. | 10% owner | Buy | 14K | $11.00 | $153K | 12.9M |
| 2025-11-25 | Tempus AI, Inc. | 10% owner | Buy | 10K | $10.08 | $98K | 12.9M |
| 2025-11-24 | Tempus AI, Inc. | 10% owner | Buy | 25K | $9.87 | $249K | 12.9M |
| 2025-11-21 | Tempus AI, Inc. | 10% owner | Buy | 17K | $9.74 | $162K | 12.9M |
| 2025-11-21 | Tempus AI, Inc. | 10% owner | Buy | 10K | $8.84 | $88K | 12.9M |
| 2025-11-20 | Tempus AI, Inc. | 10% owner | Buy | 29K | $8.63 | $249K | 12.8M |
| 2025-11-19 | Tempus AI, Inc. | 10% owner | Buy | 31K | $8.12 | $249K | 12.8M |
| 2025-11-18 | Tempus AI, Inc. | 10% owner | Buy | 65K | $7.67 | $497K | 12.8M |
| 2025-11-03 | Hall Christopher M | PRESIDENT AND CEO | Sell | 30K | $8.99 | $266K | 148K |
| 2025-07-28 | Tachibana Aaron | CFO AND COO | Sell | 641 | $6.57 | $4K | 164K |
| 2025-07-28 | Chen Richard | CHIEF MEDICAL OFFICER AND EVP | Sell | 452 | $6.57 | $3K | 125K |
| 2025-05-16 | Chen Richard | CHIEF MEDICAL OFFICER AND EVP | Sell | 910 | $4.95 | $5K | 125K |
| 2025-05-16 | Moore Stephen Michael | SVP and Chief Legal Officer | Sell | 2K | $4.95 | $8K | 64K |
| 2025-05-16 | Tachibana Aaron | CFO AND COO | Sell | 1K | $4.95 | $6K | 165K |
| 2025-01-28 | Chen Richard | CHIEF MEDICAL OFFICER AND EVP | Sell | 519 | $5.79 | $3K | 123K |
| 2025-01-28 | Tachibana Aaron | CFO AND COO | Sell | 708 | $5.79 | $4K | 166K |
| 2024-12-16 | Tachibana Aaron | CFO AND COO | Sell | 7K | $3.82 | $26K | 167K |
| 2024-12-16 | Moore Stephen Michael | SVP and Chief Legal Officer | Sell | 2K | $3.82 | $6K | 66K |
| 2024-12-16 | Chen Richard | CHIEF MEDICAL OFFICER AND EVP | Sell | 5K | $3.82 | $18K | 124K |
| 2024-11-18 | Chen Richard | CHIEF MEDICAL OFFICER AND EVP | Sell | 921 | $3.79 | $3K | 129K |
| 2024-11-18 | Moore Stephen Michael | SVP and Chief Legal Officer | Sell | 2K | $3.79 | $6K | 67K |
| 2024-11-18 | Tachibana Aaron | CFO AND COO | Sell | 1K | $3.79 | $5K | 174K |
| 2024-11-01 | Hall Christopher M | PRESIDENT AND CEO | Sell | 26K | $5.38 | $142K | 178K |
| 2024-08-16 | Tempus AI, Inc. | 10% owner | Exercise (in or at the money) | 4.6M | $1.50 | $6.9M | 4.6M |
| 2024-08-16 | Tempus AI, Inc. | TenPercentOwner | Exercise (in or at the money) | 4.6M | $2.50 | $11.5M | 9.2M |
| 2024-08-16 | Tempus AI, Inc. | TenPercentOwner | Buy | 3.5M | $5.07 | $17.7M | 12.7M |
| 2024-07-30 | Tachibana Aaron | CFO AND COO | Sell | 742 | $2.97 | $2K | 175K |
| 2024-07-30 | Chen Richard | CHIEF MEDICAL OFFICER AND EVP | Sell | 524 | $2.97 | $2K | 127K |
| 2024-06-17 | Moore Stephen Michael | SVP and Chief Legal Officer | Sell | 2K | $1.29 | $2K | 69K |
| 2024-06-17 | Tachibana Aaron | CFO AND COO | Sell | 7K | $1.29 | $9K | 176K |
| 2024-06-17 | Chen Richard | CHIEF MEDICAL OFFICER AND EVP | Sell | 5K | $1.29 | $7K | 128K |
| 2024-05-17 | Moore Stephen Michael | SVP and Chief Legal Officer | Sell | 2K | $1.38 | $2K | 71K |
| 2024-05-17 | Tachibana Aaron | CFO AND COO | Sell | 1K | $1.38 | $2K | 183K |
| 2024-05-17 | Chen Richard | CHIEF MEDICAL OFFICER AND EVP | Sell | 940 | $1.38 | $1K | 133K |
| 2024-04-30 | Moore Stephen Michael | SVP and Chief Legal Officer | Sell | 5K | $1.37 | $6K | 72K |
| 2024-03-01 | MYERS WOODROW A JR | Director | Buy | 10K | $1.67 | $17K | 26K |
| 2024-01-29 | Tachibana Aaron | CFO AND COO | Sell | 716 | $1.37 | $981 | 185K |
| 2024-01-29 | Chen Richard | CHIEF MEDICAL OFFICER AND EVP | Sell | 526 | $1.37 | $721 | 129K |
| 2023-12-15 | Moore Stephen Michael | General Counsel | Sell | 1K | $1.47 | $2K | 77K |
| 2023-12-15 | Tachibana Aaron | CFO and COO | Sell | 7K | $1.47 | $10K | 185K |
| 2023-12-15 | Chen Richard | Chief Medical Officer and EVP | Sell | 5K | $1.47 | $7K | 129K |
| 2023-11-16 | Moore Stephen Michael | General Counsel | Sell | 2K | $1.04 | $2K | 78K |
| 2023-11-16 | Chen Richard | Chief Medical Officer and EVP | Sell | 940 | $1.04 | $978 | 124K |
| 2023-11-16 | Tachibana Aaron | CFO and COO | Sell | 1K | $1.04 | $1K | 192K |
| 2023-11-01 | Hall Christopher M | President and CEO | Sell | 20K | $0.93 | $19K | 205K |
| 2023-07-31 | Chen Richard | Chief Medical Officer and EVP | Sell | 485 | $2.26 | $1K | 125K |
| 2023-07-31 | Tachibana Aaron | CFO and COO | Sell | 662 | $2.26 | $1K | 193K |
| 2023-06-16 | Tachibana Aaron | CFO and COO | Sell | 7K | $2.07 | $14K | 194K |
| 2023-06-16 | Chen Richard | Chief Medical Officer and EVP | Sell | 5K | $2.07 | $10K | 126K |
| 2023-06-16 | Moore Stephen Michael | General Counsel | Sell | 2K | $2.07 | $3K | 80K |
| 2023-05-17 | Chen Richard | Chief Medical Officer and EVP | Sell | 971 | $1.98 | $2K | 130K |
| 2023-05-17 | Moore Stephen Michael | General Counsel | Sell | 2K | $1.98 | $4K | 82K |
| 2023-05-17 | Tachibana Aaron | CFO and COO | Sell | 1K | $1.98 | $3K | 201K |
| 2023-05-02 | Moore Stephen Michael | General Counsel | Sell | 5K | $2.29 | $12K | 83K |
| 2023-03-17 | Chen Richard | Chief Medical Officer and EVP | Sell | 1K | $2.83 | $4K | 131K |
| 2023-03-17 | Tachibana Aaron | CFO and COO | Sell | 4K | $2.83 | $11K | 202K |
| 2023-01-31 | Chen Richard | Chief Medical Officer | Sell | 562 | $2.20 | $1K | 133K |
| 2023-01-31 | Tachibana Aaron | Chief Financial Officer | Sell | 767 | $2.20 | $2K | 206K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON10 Form 144 notices on file for PSNL worth $8.1M at the prices reported; 0 in the last 90 days worth $0. Latest: RICHARD CHEN filed on 2026-07-15 to sell 100,000 shares ($1.5M) from 2026-07-15.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-07-15 | RICHARD CHENOfficer | 100K | $1.5M | 0.095% | 2026-07-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-09 | Chris HallDirector, Officer | 100K | $1.4M | 0.095% | 2026-07-09 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-29 | AARON TACHIBANAOfficer | 5K | $65K | 0.005% | 2026-06-29 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-26 | AARON TACHIBANAOfficer | 51K | $645K | 0.049% | 2026-06-26 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-26 | Chris HallDirector, Officer | 100K | $1.3M | 0.095% | 2026-06-26 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-04 | AARON TACHIBANAOfficer | 40K | $431K | 0.038% | 2026-06-04 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-29 | AARON TACHIBANAOfficer | 39K | $426K | 0.037% | 2026-05-29 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-28 | CHRISTOPHER HALLDirector, Officer | 100K | $949K | 0.095% | 2026-05-28 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-01-22 | AARON L TACHIBANAOfficer | 40K | $386K | 0.045% | 2026-01-22 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-11-25 | AARON L TACHIBANAOfficer | 104K | $1.0M | 0.117% | 2025-11-25 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON4 holders report 5% or more of PSNL in their latest filing, 2 on Schedule 13D (active intent). The largest reported stake is Eric Lefkofsky at 12.6% of the class (13,189,067 shares), filed 2026-07-21 for an event on 2026-07-19.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-14 | 13G/Ano. 1 | Ameriprise Financial, Inc.parent holding company | 6.1M | 5.8% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 1 | David Kroinparent holding company, individual | 4.0M | 3.8% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 1 | Deep Track Capital, LPinvestment adviser, other entity | 4.0M | 3.8% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 1 | Deep Track Biotechnology Master Fund, Ltd.corporation | 4.0M | 3.8% | 2026-06-30 |
| 2026-07-29 | 13G | BlackRock, Inc.parent holding company | 6.2M | 5.9% | 2026-06-30 |
| 2026-07-21 | 13D/Ano. 3 | Eric Lefkofskyindividual | 13.2M | 12.6% | 2026-07-19 |
| 2026-07-21 | 13D/Ano. 3 | Tempus AI, Inc.corporation | 13.0M | 12.5% | 2026-07-19 |
| 2026-06-10 | 13D/Ano. 3 | Lightspeed Venture Partners VIII, L.P.partnership | 2.1M | 2.0% | 2026-06-08 |
| 2026-06-10 | 13D/Ano. 3 | Lightspeed Trustee VIII, LLCother entity | 2.1M | 2.0% | 2026-06-08 |
| 2026-06-10 | 13D/Ano. 3 | Lightspeed General Partner Select IV, L.P.partnership | 2.1M | 2.0% | 2026-06-08 |
| 2026-06-10 | 13D/Ano. 3 | Lightspeed Venture Partners Select IV, L.P.partnership | 2.1M | 2.0% | 2026-06-08 |
| 2026-06-10 | 13D/Ano. 3 | Lightspeed Ultimate General Partner Select IV, L.L.C.other entity | 2.1M | 2.0% | 2026-06-08 |
| 2026-06-10 | 13D/Ano. 3 | LSVP VIII Trustother entity | 2.1M | 2.0% | 2026-06-08 |
| 2026-06-10 | 13D/Ano. 3 | Lightspeed Ultimate General Partner VIII, Ltd.other entity | 2.1M | 2.0% | 2026-06-08 |
| 2026-06-10 | 13D/Ano. 3 | Lightspeed General Partner VIII, L.P.partnership | 2.1M | 2.0% | 2026-06-08 |
| 2026-06-10 | 13D/Ano. 3 | Lightspeed General Partner Select, L.P.partnership | 2.0M | 1.9% | 2026-06-08 |
| 2026-06-10 | 13D/Ano. 3 | Lightspeed Ultimate General Partner Select, Ltd.other entity | 2.0M | 1.9% | 2026-06-08 |
| 2026-06-10 | 13D/Ano. 3 | Lightspeed Venture Partners Select, L.P.partnership | 2.0M | 1.9% | 2026-06-08 |
| 2026-04-08 | 13G/Ano. 1 | T. Rowe Price Investment Management, Inc.investment adviser | 4.8M | 4.5% | 2026-03-31 |
| 2026-01-29 | 13G/Ano. 3 | Orin Hirschmanparent holding company, individual | 3.4M | 3.8% | 2025-12-31 |
| 2026-01-29 | 13G/Ano. 3 | AIGH Capital Management LLCinvestment adviser, other entity | 2.9M | 3.3% | 2025-12-31 |
13F holders
Tracked managers holding PSNL at their latest 13F. JSON5 of the 30 tracked managers held PSNL at their latest 13F, $119.7M in total at quarter-end prices. ARK Investment Management is the largest at $110.8M (0.7% 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 |
|---|---|---|---|---|---|
| ARK Investment Management | 2026-06-30 | 8.3M | $110.8M | 0.72% | +327K |
| Millennium Management | 2026-06-30 | 450K | $6.0M | 0.00% | +31K |
| Citadel Advisors | 2026-06-30 | 145K | $1.9M | 0.00% | new |
| Two Sigma Investments | 2026-06-30 | 57K | $767K | 0.00% | -33K |
| AQR Capital Management | 2026-06-30 | 12K | $158K | 0.00% | -6K |
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.
Financials
SEC XBRL, as filed. JSONIn Q2 FY 2026 (quarter ended 2026-06-30) Personalis reported revenue of $22.4M, up 30.0% from the same quarter a year earlier, and net loss of $31.7M (-0.30 diluted EPS). In FY 2025 it generated -$74.9M of operating cash flow.
- Cash
- $94.0M
- Equity
- $235.2M
- Total assets
- $312.1M
- Shares outstanding
- 106,799,872
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q2 FY 2026 | 2026-06-30 | $22.4M | -$31.7M | -141.7% | -0.30 |
| Q1 FY 2026 | 2026-03-31 | $15.5M | -$30.0M | -194.1% | -0.29 |
| Q4 FY 2025derived | 2025-12-31 | $17.3M | -$23.8M | -137.3% | n/a |
| Q3 FY 2025 | 2025-09-30 | $14.5M | -$21.7M | -149.4% | -0.24 |
| Q2 FY 2025 | 2025-06-30 | $17.2M | -$20.1M | -116.6% | -0.23 |
| Q1 FY 2025 | 2025-03-31 | $20.6M | -$15.8M | -76.4% | -0.18 |
| Q4 FY 2024derived | 2024-12-31 | $16.8M | -$16.4M | -97.8% | n/a |
| Q3 FY 2024 | 2024-09-30 | $25.7M | -$39.1M | -152.0% | -0.64 |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2025 | 2025-12-31 | $69.6M | -$81.3M | -$74.9M | $4.5M | n/a | n/a |
| FY 2024 | 2024-12-31 | $84.6M | -$81.3M | -$45.1M | $1.6M | n/a | n/a |
| FY 2023 | 2023-12-31 | $73.5M | -$108.3M | -$56.3M | $10.9M | n/a | n/a |
| FY 2022 | 2022-12-31 | $65.0M | -$113.3M | -$70.2M | $49.9M | n/a | n/a |
| FY 2021 | 2021-12-31 | $85.5M | -$65.2M | -$70.8M | $11.1M | n/a | n/a |
Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-07-29 from the cover page.
What this page is
Personalis 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 Personalis (PSNL), SEC CIK 1527753, listed on Nasdaq, classified by the SEC as services-medical laboratories. 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 2026-10-07.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 2026-07-15.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 2026-08-14.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
- Financials
- SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. 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 2026-08-04.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 2026-09-18.JSON and CSV
- Company record
- EDGAR filing index for CIK 1527753Ticker, 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-medical laboratories
Other company pages
Datasets
Frequently Asked Questions
How much of PSNL is sold short?
6,793,284 shares were held short at the 2026-10-15 settlement, 2.6 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 PSNL's daily short volume?
On 2026-11-03, 363,401 of the 1,227,252 PSNL shares reported to FINRA were sold short, 29.6% of the day's reported volume. Short volume is a flow for one day, not a position.
Does PSNL have fails to deliver?
The SEC's latest file shows 1,805 PSNL shares failed to deliver at settlement 2026-10-07. Fails are reported per settlement date and published twice a month with a lag.
Are PSNL insiders buying or selling?
Insiders at PSNL reported 4 open-market sells worth $267K in the last 90 days and no open-market buys. Latest filing: Tachibana Aaron (CFO AND COO) on 2026-09-18.
Have PSNL insiders filed to sell?
10 Form 144 notices on file for PSNL worth $8.1M at the prices reported; 0 in the last 90 days worth $0. Latest: RICHARD CHEN filed on 2026-07-15 to sell 100,000 shares ($1.5M) from 2026-07-15.
Who owns 5% or more of PSNL?
4 holders report 5% or more of PSNL in their latest filing, 2 on Schedule 13D (active intent). The largest reported stake is Eric Lefkofsky at 12.6% of the class (13,189,067 shares), filed 2026-07-21 for an event on 2026-07-19.
What did PSNL report last quarter?
In Q2 FY 2026 (quarter ended 2026-06-30) Personalis reported revenue of $22.4M, up 30.0% from the same quarter a year earlier, and net loss of $31.7M (-0.30 diluted EPS). In FY 2025 it generated -$74.9M of operating cash flow.
Which tracked 13F managers own PSNL?
5 of the 30 tracked 13F managers held PSNL shares at their latest filing, $119.7M in all. The largest: Cathie Wood's ARK Investment Management (8.3M shares, $110.8M), Izzy Englander's Millennium Management (450K shares, $6.0M), Ken Griffin's Citadel Advisors (145K shares, $1.9M), Two Sigma Investments (57K shares, $767K), Cliff Asness's AQR Capital Management (12K shares, $158K).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.