InsiderSource
ADPT

Adaptive Biotechnologies Corp

SEC CIK 1478320
$17.60 +1.7% · 90 days
90-day buys
$0
0 open-market
90-day sells
$11.48M
42 open-market
Net insider flow
−$11.48M
Net selling
Filings shown
98
Most recent
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At a glance

Over the last 90 days, insiders at ADPT have sold a net $11.48M of stock (0 open-market buys vs 42 sells).

Largest recent trade: Robins Harlan S sold $4.34M of ADPT, trimming their stake 18%.

Most active filer: Rubinstein Julie, with 77 transactions among the recent filings shown.

Insider transaction history

Form 4 filings for ADPT, newest first
View on SEC EDGAR ↗
ADPT
Adaptive Biotechnologies Corp
Sell RUBINSTEIN JULIE · President and COO · Open-market sale · filed Apr 13, 2026 ΔOwn −3.6%

Rubinstein Julie sold $203.6K of ADPT, trimming their stake 4%.

−$203.6K
15,722 sh @ $13
ADPT
Adaptive Biotechnologies Corp
Sell RUBINSTEIN JULIE · President and COO · Open-market sale · filed Apr 13, 2026 ΔOwn −4.2%

Rubinstein Julie sold $237.9K of ADPT, trimming their stake 4%.

−$237.9K
18,660 sh @ $13
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ADPT
Adaptive Biotechnologies Corp
Sell RUBINSTEIN JULIE · President and COO · Open-market sale · filed Apr 13, 2026 ΔOwn −3.8%

Rubinstein Julie sold $233.9K of ADPT, trimming their stake 4%.

−$233.9K
16,960 sh @ $14
ADPT
Adaptive Biotechnologies Corp
Sell LO FRANCIS · Chief People Officer · Open-market sale · filed Apr 10, 2026 ΔOwn −7.7%

Lo Francis sold $340K of ADPT, trimming their stake 8%.

−$340K
22,564 sh @ $15
ADPT
Adaptive Biotechnologies Corp
Sell ROBINS HARLAN S · Chief Scientific Officer · Open-market sale · filed Apr 10, 2026 ΔOwn −0.7%

Robins Harlan S sold $148.5K of ADPT, trimming their stake 1%.

−$148.5K
10,000 sh @ $15
ADPT
Adaptive Biotechnologies Corp
Sell ROBINS CHAD M · Director, CEO and Chairman · Open-market sale · filed Apr 8, 2026 ΔOwn −1.7%

Robins Chad M sold $566K of ADPT, trimming their stake 2%.

−$566K
37,263 sh @ $15
ADPT
Adaptive Biotechnologies Corp
Sell RUBINSTEIN JULIE · President and COO · Open-market sale · filed Apr 8, 2026 ΔOwn −6.6%

Rubinstein Julie sold $457.4K of ADPT, trimming their stake 7%.

−$457.4K
30,841 sh @ $15
ADPT
Adaptive Biotechnologies Corp
Sell RUBINSTEIN JULIE · President and COO · Open-market sale · filed Apr 8, 2026 ΔOwn −4.2%

Rubinstein Julie sold $258.5K of ADPT, trimming their stake 4%.

−$258.5K
19,060 sh @ $14
ADPT
Adaptive Biotechnologies Corp
Sell ROBINS CHAD M · Director, CEO and Chairman · Open-market sale · filed Apr 8, 2026 ΔOwn −3.6%

Robins Chad M sold $1.2M of ADPT, trimming their stake 4%.

−$1.2M
83,332 sh @ $14
ADPT
Adaptive Biotechnologies Corp
Sell RUBINSTEIN JULIE · President and COO · Open-market sale · filed Apr 8, 2026 ΔOwn −4.1%

Rubinstein Julie sold $273.1K of ADPT, trimming their stake 4%.

−$273.1K
19,060 sh @ $14
ADPT
Adaptive Biotechnologies Corp
Sell RUBINSTEIN JULIE · President and COO · Open-market sale · filed Apr 2, 2026 ΔOwn −4.1%

Rubinstein Julie sold $278.3K of ADPT, trimming their stake 4%.

−$278.3K
19,060 sh @ $15
ADPT
Adaptive Biotechnologies Corp
Sell RUBINSTEIN JULIE · President and COO · Open-market sale · filed Apr 2, 2026 ΔOwn −4.1%

Rubinstein Julie sold $275.4K of ADPT, trimming their stake 4%.

−$275.4K
19,060 sh @ $14
ADPT
Adaptive Biotechnologies Corp
Sell RUBINSTEIN JULIE · President and COO · Open-market sale · filed Mar 31, 2026 ΔOwn −4.0%

Rubinstein Julie sold $256.4K of ADPT, trimming their stake 4%.

−$256.4K
19,060 sh @ $13
ADPT
Adaptive Biotechnologies Corp
Sell RUBINSTEIN JULIE · President and COO · Open-market sale · filed Mar 31, 2026 ΔOwn −4.0%

Rubinstein Julie sold $240.7K of ADPT, trimming their stake 4%.

−$240.7K
19,060 sh @ $13
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About ADPT insider activity

This page tracks every recent Form 4 filed for Adaptive Biotechnologies Corp with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.

The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.

Frequently asked questions

How often is ADPT insider data updated?

Continuously. We read from SEC EDGAR, so new Form 4 filings for Adaptive Biotechnologies Corp usually appear here within minutes of being accepted by the SEC.

What does "net insider flow" mean?

It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.

Why do some rows show grants or option exercises instead of buys?

Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.

Is this investment advice?

No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.