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sellWeak cluster of 3

Marcia Belvin sold $37k of CTMX

SVP, Chief Scientific Officer at CytomX Therapeutics, Inc.. 13,884 shares at an average of $2.69, traded Jun 16, 2025, filed Jun 17, 2025.

Warning score
21
Value
$37k
13,884 shares
Holdings after
272,252
-5% from before
From 52-week low
+469%
low $0.43, close $2.46
From 52-week high
-18%
high $2.99, as of Jun 16, 2025

Score components

  • Role
    Officer
    +15
  • Trade size
    $37k at market
    +6
  • Share of holdings sold
    Sold 4.9% of holdings
    0
  • Cluster
    3 insiders selling within 14 days
    +15
  • Exercise and sell
    Shares came from an option exercise in the same filing
    -15

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.

This signal so far: 1m 0.0%, 3m -17.6%, 6m +78.6%.

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.

CTMXOct 12, 2026 · close 2.42
Since filing Jun 17, 2025: +1.7%SPY +32.4% · excess -30.7%

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 0001610717-25-000235, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Jun 13, 2025MOption exercise
Common Stock
+37,500$0.00$0286,136Jun 17, 2025
Jun 16, 2025SOpen-market sale
Common Stock
-13,884$2.69$37k272,252Jun 17, 2025
Jun 13, 2025MOption exercise
Performance Stock Unitsderivative
-37,500$0.00$00Jun 17, 2025

Related signals

Other insiders at CytomX Therapeutics, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
22Weak
CTMXsell
CytomX Therapeutics, Inc.
Christopher Ogden
Chief Financial Officer
$4,953
1,624 shares
-1%
42Moderate
CTMXsell 4
CytomX Therapeutics, Inc.
Marcia Belvin
SVP, Chief Scientific Officer
$202k
31,492 shares
-9%
46Moderate
CTMXsell 4
CytomX Therapeutics, Inc.
Yu-Waye Chu
Chief Medical Officer
$137k
21,279 shares
-10%
47Moderate
CTMXsell 4
CytomX Therapeutics, Inc.
Christopher Ogden
Chief Financial Officer
$124k
19,323 shares
-6%
42Moderate
CTMXsell 410b5-1
CytomX Therapeutics, Inc.
Sean A. McCarthy
CEO
$764k
118,969 shares
-10%
22Weak
CTMXsell10b5-1
CytomX Therapeutics, Inc.
Sean A. McCarthy
CEO
$462k
101,793 shares
-9%
36Weak
CTMXsell 3
CytomX Therapeutics, Inc.
Sean A. McCarthy
CEO
$149k
55,511 shares
-5%
28Weak
CTMXsell 3
CytomX Therapeutics, Inc.
Christopher Ogden
Chief Financial Officer
$33k
12,255 shares
-6%
30Weak
CTMXsell 5
CytomX Therapeutics, Inc.
Marcia Belvin
SVP, Chief Scientific Officer
$12k
19,512 shares
-7%
30Weak
CTMXsell 5
CytomX Therapeutics, Inc.
Yu-Waye Chu
Chief Medical Officer
$2,411
4,025 shares
-3%

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.

Marcia Belvin sold $37k of CTMX | InsiderTell