SEC Form 4
Personalis, Inc. (PSNL) insider trading
In the 12 months to Oct 26, 2026, 3 PSNL insiders reported open-market sales of $8.2M across 10 filings; one 10% owner bought $2.7M.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $8.2M
- 10 filings · 3 insiders
- Open-market purchases
- $2.7M
- 1 filing · Tempus AI, Inc., 10% owner
- Pre-arranged sales (10b5-1)
- 10 of 10
- All $8.2M sold was pre-arranged
Who traded PSNL, and when
- Purchase
- Sale
- Sale, pre-arranged (10b5-1)
PSNL daily close from Oct 27, 2025 to Oct 26, 2026, between $5.04 and $18.38, last $15.97. 10 sale and 1 purchase filings by 4 insiders, marked at their filing dates. Christopher M. Hall, Chief Executive Officer: sold $3.9M across 3 filings, first filed May 29, 2026, last Jul 9, 2026. Aaron Tachibana, CFO AND COO: sold $2.8M across 6 filings, first filed Nov 28, 2025, last Jun 29, 2026. Tempus AI, Inc., 10% owner: bought $2.7M across 1 filing, first filed Feb 13, 2026, last Feb 13, 2026. Richard Chen, President and CMO: sold $1.5M across 1 filing, first filed Jul 15, 2026, last Jul 15, 2026.
Largest mark · tap a row for others
Tempus AI, Inc. · 10% owner
Purchase $2,739,181
320,267 shares at $8.55 avg
Filed Feb 13, 2026 · traded Nov 18
Close on filing date $8.21
Christopher M. Hall · Chief Executive Officer
Chief Executive Officer
$3.9M soldAaron Tachibana · CFO AND COO
CFO AND COO
$2.8M soldTempus AI, Inc. · 10% owner
10% owner
$2.7M boughtRichard Chen · President and CMO
President and CMO
$1.5M soldOpen-market trades
11 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Christopher M. Hall | Chief Executive Officer | $3.9M | — | 3 | 100% of sales | |
| Aaron Tachibana | CFO AND COO | $2.8M | — | 6 | 100% of sales | |
| Tempus AI, Inc. | 10% owner | — | $2.7M | 1 | — | |
| Richard Chen | President and CMO | $1.5M | — | 1 | 100% of sales |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Richard Chen President and CMO | SalePre-arranged (10b5-1) | 100,000 | $15.15 | $1.5M | 173,880 | |
traded | Christopher M. Hall Chief Executive Officer | SalePre-arranged (10b5-1) | 100,000 | $15.08 | $1.5M | 235,986 | |
traded | Aaron Tachibana CFO AND COO | SalePre-arranged (10b5-1) | 4,982 | $14.00 | $69.7K | 198,833 | |
traded | Aaron Tachibana CFO AND COO | SalePre-arranged (10b5-1) | 51,251 | $13.18 | $675.5K | 198,833 | |
traded | Christopher M. Hall Chief Executive Officer | SalePre-arranged (10b5-1) | 100,000 | $13.15 | $1.3M | 235,986 | |
traded | Aaron Tachibana CFO AND COO | SalePre-arranged (10b5-1) | 40,000 | $12.01 | $480.4K | 198,833 | |
traded | Aaron Tachibana CFO AND COO | SalePre-arranged (10b5-1) | 38,799 | $11.58 | $449.3K | 198,833 | |
traded | Christopher M. Hall Chief Executive Officer | SalePre-arranged (10b5-1) | 100,000 | $11.02 | $1.1M | 235,986 | |
traded | Tempus AI, Inc. 10% owner | Purchase | 320,267 | $8.55 | $2.7M | 13,039,067 | |
traded | Aaron Tachibana CFO AND COO | SalePre-arranged (10b5-1) | 1,201 | $11.50 | $13.8K | 164,458 | |
traded | Aaron Tachibana CFO AND COO | SalePre-arranged (10b5-1) | 103,668 | $10.78 | $1.1M | 164,458 |
GET /stocks/filings/vX/form-4?tickers=PSNL&filing_date.gte=2025-10-26&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"PSNL"
],
"issuer_cik": "0001527753",
"owner_cik": "0001779787",
"accession_number": "0001779787-26-000003",
"form_type": "4",
"filing_date": "2026-07-15",
"period_of_report": "2026-07-15",
"issuer_name": "Personalis, Inc.",
"issuer_trading_symbol": "PSNL",
"owner_name": "Chen Richard",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "President and CMO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-07-15",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 100000,
"transaction_price_per_share": 15.15,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 173880,
"transaction_value": 1515000,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "The sales and option exercise reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 23, 2025."
},
{
"id": "F2",
"description": "The price reported above reflects the weighted average price of the shares sold. The sale price ranged from $15.01 to $15.45 per share. Upon request from the SEC staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4."
}
]
},
{
"tickers": [
"PSNL"
],
"issuer_cik": "0001527753",
"owner_cik": "0001449535",
"accession_number": "0001449535-26-000006",
"form_type": "4",
"filing_date": "2026-07-09",
"period_of_report": "2026-07-09",
"issuer_name": "Personalis, Inc.",
"issuer_trading_symbol": "PSNL",
"owner_name": "Hall Christopher M",
"is_director": true,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "Chief Executive Officer",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-07-09",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 100000,
"transaction_price_per_share": 15.08,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 235986,
"transaction_value": 1508000,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "The sales and option exercise reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 17, 2025."
},
{
"id": "F2",
"description": "The price reported above reflects the weighted average price of the shares sold. The sale price ranged from $15.00 to $15.24 per share. Upon request from the SEC staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 27 records
- Option exercises12 records
- Tax withholding (sold to cover)5 records
- Grants and awards10 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.
Frequently asked questions
Has Personalis, Inc.'s CEO sold stock?
Yes. Christopher M. Hall (CEO) sold 300,000 shares ($3.9M) between May 2026 and Jul 2026, all under a pre-arranged 10b5-1 plan.
How current is PSNL’s insider data?
These are PSNL Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.
What counts as an open-market buy or sell?
Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.
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Track PSNL insider trades with your agent
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for PSNL every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
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