Adaptive Biotechnologies Corp

ADPT

Form 4 • Statement of Changes in Beneficial Ownership

SEC Accession Number: 0001780664-26-000002
Filing date: Mar 5, 2026
Earliest execution date: Mar 3, 2026
Reporting Owners: RUBINSTEIN JULIE (COO)

Summary

Type

Sell

Net shares

-92,823

% of shares

-3.83%

Amount (USD)

$1,493,427

Insider confidence score

36.3 out of 100

Positive

  • Under Rule 10b5-1 trading plan

Negative

  • Significant scheduled sell (<5% of shares)
  • Very large sell amount ($1M+)

Stock transactions

Transaction 1

Security

Common Stock

Action

Exercise

Date

2026-03-03

Code

M

Net shares

+14,722.0

Price per Share

$6.55

Amount (USD)

$96,429.10

Acquired/Disposed

Acquired

Shares Owned Before

588,249.0

Shares Owned After

602,971.0

Transaction 2

Security

Common Stock

Action

Exercise

Date

2026-03-03

Code

M

Net shares

+11,881.0

Price per Share

$12.14

Amount (USD)

$144,235.34

Acquired/Disposed

Acquired

Shares Owned Before

602,971.0

Shares Owned After

614,852.0

Transaction 3

Security

Common Stock

Action

Sell

Date

2026-03-03

Code

S

Net shares

-24,423.0

Price per Share

$15.49

Amount (USD)

$378,312.27

Acquired/Disposed

Disposed

Shares Owned Before

614,852.0

Shares Owned After

590,429.0

Transaction 4

Security

Common Stock

Action

Sell

Date

2026-03-03

Code

S

Net shares

-6,518.0

Price per Share

$16.33

Amount (USD)

$106,438.94

Acquired/Disposed

Disposed

Shares Owned Before

590,429.0

Shares Owned After

583,911.0

Transaction 5

Security

Common Stock

Action

Exercise

Date

2026-03-04

Code

M

Net shares

+14,722.0

Price per Share

$6.55

Amount (USD)

$96,429.10

Acquired/Disposed

Acquired

Shares Owned Before

583,911.0

Shares Owned After

598,633.0

Transaction 6

Security

Common Stock

Action

Exercise

Date

2026-03-04

Code

M

Net shares

+11,881.0

Price per Share

$12.14

Amount (USD)

$144,235.34

Acquired/Disposed

Acquired

Shares Owned Before

598,633.0

Shares Owned After

610,514.0

Transaction 7

Security

Common Stock

Action

Sell

Date

2026-03-04

Code

S

Net shares

-30,941.0

Price per Share

$16.60

Amount (USD)

$513,620.60

Acquired/Disposed

Disposed

Shares Owned Before

610,514.0

Shares Owned After

579,573.0

Transaction 8

Security

Common Stock

Action

Exercise

Date

2026-03-05

Code

M

Net shares

+14,722.0

Price per Share

$6.55

Amount (USD)

$96,429.10

Acquired/Disposed

Acquired

Shares Owned Before

579,573.0

Shares Owned After

594,295.0

Transaction 9

Security

Common Stock

Action

Exercise

Date

2026-03-05

Code

M

Net shares

+11,881.0

Price per Share

$12.14

Amount (USD)

$144,235.34

Acquired/Disposed

Acquired

Shares Owned Before

594,295.0

Shares Owned After

606,176.0

Transaction 10

Security

Common Stock

Action

Sell

Date

2026-03-05

Code

S

Net shares

-30,941.0

Price per Share

$16.00

Amount (USD)

$495,056.00

Acquired/Disposed

Disposed

Shares Owned Before

606,176.0

Shares Owned After

575,235.0

Derivative Transactions

Transaction 1

Security

Stock Option (right to buy)

Action

Exercise

Date

2026-03-03

Code

M

Net shares

-14,722.0

Acquired/Disposed

Disposed

Shares Owned Before

195,325.0

Shares Owned After

180,603.0

Transaction 2

Security

Stock Option (right to buy)

Action

Exercise

Date

2026-03-03

Code

M

Net shares

-11,881.0

Acquired/Disposed

Disposed

Shares Owned Before

463,344.0

Shares Owned After

451,463.0

Transaction 3

Security

Stock Option (right to buy)

Action

Exercise

Date

2026-03-04

Code

M

Net shares

-14,722.0

Acquired/Disposed

Disposed

Shares Owned Before

180,603.0

Shares Owned After

165,881.0

Transaction 4

Security

Stock Option (right to buy)

Action

Exercise

Date

2026-03-04

Code

M

Net shares

-11,881.0

Acquired/Disposed

Disposed

Shares Owned Before

451,463.0

Shares Owned After

439,582.0

Transaction 5

Security

Stock Option (right to buy)

Action

Exercise

Date

2026-03-05

Code

M

Net shares

-14,722.0

Acquired/Disposed

Disposed

Shares Owned Before

165,881.0

Shares Owned After

151,159.0

Transaction 6

Security

Stock Option (right to buy)

Action

Exercise

Date

2026-03-05

Code

M

Net shares

-11,881.0

Acquired/Disposed

Disposed

Shares Owned Before

439,582.0

Shares Owned After

427,701.0

Filing's footnotes

1. The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 18, 2025.

2. The price reported for this transaction is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.11 to $16.10, inclusive. The reporting person undertakes to provide to Adaptive Biotechnologies Corporation, any security holder of Adaptive Biotechnologies Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in any footnotes to this Form 4.

3. The price reported for this transaction is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.11 to $16.56, inclusive. The reporting person undertakes to provide to Adaptive Biotechnologies Corporation, any security holder of Adaptive Biotechnologies Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in any footnotes to this Form 4.

4. The price reported for this transaction is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.35 to $16.94, inclusive. The reporting person undertakes to provide to Adaptive Biotechnologies Corporation, any security holder of Adaptive Biotechnologies Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in any footnotes to this Form 4.

5. The price reported for this transaction is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.74 to $16.30, inclusive. The reporting person undertakes to provide to Adaptive Biotechnologies Corporation, any security holder of Adaptive Biotechnologies Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in any footnotes to this Form 4.

6. The option is fully vested and exercisable.

7. The options vested with respect to 1/4 of such shares on March 4, 2023, with 1/48 of such shares vesting thereafter at the end of each full month of continuous service until fully vested.

ℹ️ Filed under Rule 10b5-1 trading plan

This page is for informational purposes only. While we strive for accuracy, the summary may contain inaccuracies or omissions. Please refer to the official SEC filing for authoritative information. Open the SEC filing.