Massivemarkets

SEC Form 4

Adaptive Biotechnologies Corporation (ADPT) insider trading

In the 12 months to Oct 26, 2026, 11 ADPT insiders reported open-market sales of $111.3M across 68 filings; no open-market purchases were filed.

Latest filing · Last 12 months · Source: SEC EDGAR · How we count

Open-market sales
$111.3M
68 filings · 11 insiders
Open-market purchases
$0
0 filings
Pre-arranged sales (10b5-1)
62 of 68
$91.7M of $111.3M sold (82%)

Who traded ADPT, and when

  • Sale
  • Sale, pre-arranged (10b5-1)

ADPT daily close from Oct 27, 2025 to Oct 26, 2026, between $12.41 and $29.84, last $26.28. 68 sale and 0 purchase filings by 11 insiders, marked at their filing dates. Chad M. Robins, CEO and Chairman: sold $33.6M across 7 filings, first filed Nov 12, 2025, last Aug 19, 2026. Harlan S. Robins, Chief Scientific Officer: sold $23.5M across 9 filings, first filed Nov 12, 2025, last Jul 23, 2026. Julie Rubinstein, President and COO: sold $16.4M across 19 filings, first filed Mar 5, 2026, last Oct 21, 2026. Sharon Benzeno, Chief Commercial Ofc Imm Med: sold $13.9M across 3 filings, first filed Nov 24, 2025, last Jun 30, 2026. Francis Lo, Chief People Officer: sold $13.3M across 11 filings, first filed Dec 17, 2025, last Oct 5, 2026. Kyle Piskel, Chief Financial Officer: sold $3.3M across 3 filings, first filed Dec 2, 2025, last Feb 6, 2026. 5 others: sold $7.4M across 16 filings, first filed Dec 12, 2025, last Oct 8, 2026.

Largest mark · tap a row for others

Chad M. Robins · CEO and Chairman

Sale $14,882,166

600,000 shares at $24.80 avg

Filed Aug 19, 2026 · traded Aug 17

Close on filing date $25.49

ADPT daily closelast $26.28

Chad M. Robins · CEO and Chairman

$33.6M sold

Harlan S. Robins · Chief Scientific Officer

$23.5M sold

Julie Rubinstein · President and COO

$16.4M sold

Sharon Benzeno · Chief Commercial Ofc Imm Med

$13.9M sold

Francis Lo · Chief People Officer

$13.3M sold

Kyle Piskel · Chief Financial Officer

$3.3M sold

5 others

$7.4M sold
One row per insider, smaller filers combined; marks sit at the SEC filing date, sized by dollar value.

Open-market trades

68 filings in the last 12 months
Other insider activity (not market trades) · 152 records
  • Option exercises126 records
  • Tax withholding (sold to cover)11 records
  • Grants and awards14 records
  • Gifts1 record

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.
Counted once
When several owners (a fund and its partners, say) report the same trade, it's counted once. Corrected filings replace the originals.

Frequently asked questions

Has the Adaptive Biotechnologies Corporation's CEO sold stock?

Yes. Chad M. Robins (CEO) sold 1,745,588 shares ($33.6M) between Nov 2025 and Aug 2026, $18.7M of it under a pre-arranged 10b5-1 plan.

How current is ADPT’s insider data?

These are ADPT 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 ADPT 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 ADPT 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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