Skip to content
sellWeak cluster of 310b5-1 plan

Susan Bobulsky sold $193k of ADPT

Chief Commercial Officer, MRD at Adaptive Biotechnologies Corp. 6,444 shares at an average of $30.00, traded Oct 6, 2026, filed Oct 8, 2026.

Warning score
22
Value
$193k
6,444 shares
Holdings after
389,350
-2% from before
From 52-week low
+117%
low $12.41, close $26.90
From 52-week high
-10%
high $29.84, as of Oct 6, 2026

Score components

  • Role
    Officer
    +15
  • Trade size
    $193k at market
    +12
  • Share of holdings sold
    Sold 1.6% of holdings
    0
  • Cluster
    3 insiders selling within 14 days
    +15
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

ADPTOct 9, 2026 · close 26.49
Since filing Oct 8, 2026: +1.5%SPY +0.6% · excess +0.9%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001820885-26-000025, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Oct 6, 2026SOpen-market sale
Common Stock10b5-1
-6,444$30.00$193k389,3504 d ago

Related signals

Other insiders at Adaptive Biotechnologies Corp and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
24Weak
ADPTsell 310b5-1
Adaptive Biotechnologies Corp
Julie Rubinstein
President and COO
$948k
35,643 shares
-9%
22Weak
ADPTsell 310b5-1
Adaptive Biotechnologies Corp
Francis Lo
Chief People Officer
$758k
26,792 shares
-11%
25Weak
ADPTsell 310b5-1
Adaptive Biotechnologies Corp
Julie Rubinstein
President and COO
$1.0M
35,643 shares
-9%
23Weak
ADPTsell 210b5-1
Adaptive Biotechnologies Corp
Francis Lo
Chief People Officer
$3.2M
115,406 shares
-34%
8Weak
ADPTsell 210b5-1
Adaptive Biotechnologies Corp
Susan Bobulsky
Chief Commercial Officer, MRD
$32k
1,195 shares
-0%
12Weak
ADPTsell10b5-1
Adaptive Biotechnologies Corp
Julie Rubinstein
President and COO
$751k
57,180 shares
-12%
27Weak
ADPTsell 810b5-1
Adaptive Biotechnologies Corp
Julie Rubinstein
President and COO
$802k
57,180 shares
-12%
27Weak
ADPTsell 810b5-1
Adaptive Biotechnologies Corp
Julie Rubinstein
President and COO
$770k
57,180 shares
-11%
27Weak
ADPTsell 810b5-1
Adaptive Biotechnologies Corp
Julie Rubinstein
President and COO
$762k
57,180 shares
-11%
52Moderate
ADPTsell 8
Adaptive Biotechnologies Corp
Michelle Renee Griffin
director
$214k
15,394 shares
-50%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.