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sellWeak cluster of 410b5-1 plan

David T Howton sold $25k of SLDB

Chief Operating Officer at Solid Biosciences Inc.. 4,932 shares at an average of $5.11, traded Dec 3, 2025, filed Dec 4, 2025.

Warning score
10
Value
$25k
4,932 shares
Holdings after
32,908
-13% from before
From 52-week low
+106%
low $2.52, close $5.19
From 52-week high
-27%
high $7.07, as of Dec 3, 2025

Score components

  • Role
    COO
    +20
  • Trade size
    $25k at market
    +5
  • Share of holdings sold
    Sold 13% of holdings
    +5
  • Cluster
    4 insiders selling within 14 days
    +15
  • Exercise and sell
    Shares came from an option exercise in the same filing
    -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.

This signal so far: 1m -7.9%, 3m -5.2%, 6m +22.3%.

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.

SLDBOct 9, 2026 · close 6.87
Since filing Dec 4, 2025: +16.0%SPY +14.9% · excess +1.1%

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 0001193125-25-308118, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Dec 2, 2025MOption exercise
Common Stock10b5-1
+13,051--37,840Dec 4, 2025
Dec 3, 2025SOpen-market sale
Common Stock10b5-1
-4,932$5.11$25k32,908Dec 4, 2025
Dec 2, 2025MOption exercise
Restricted Stock Unitsderivative10b5-1
-13,051$0.00$013,052Dec 4, 2025

Related signals

Other insiders at Solid Biosciences Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
15Weak
SLDBsell 710b5-1
Solid Biosciences Inc.
Alexander Cumbo
President and CEO
$97k
16,644 shares
-7%
0Weak
SLDBsell 710b5-1
Solid Biosciences Inc.
Ilan Ganot
director
$15k
2,658 shares
-9%
0Weak
SLDBsell 710b5-1
Solid Biosciences Inc.
Jessie Hanrahan
Chief Regulatory Officer
$24k
4,134 shares
-5%
0Weak
SLDBsell 710b5-1
Solid Biosciences Inc.
Paul Herzich
Chief Technology Officer
$21k
3,616 shares
-5%
6Weak
SLDBsell 710b5-1
Solid Biosciences Inc.
David T Howton
Chief Operating Officer
$43k
7,469 shares
-7%
7Weak
SLDBsell 710b5-1
Solid Biosciences Inc.
Kevin Tan
CFO & Treasurer
$31k
5,404 shares
-5%
24Weak
SLDBsell 710b5-1
Solid Biosciences Inc.
Gabriel Brooks
Chief Medical Officer
$81k
12,616 shares
-13%
39Weak
SLDBsell 710b5-1
Solid Biosciences Inc.
Alexander Cumbo
President and CEO
$315k
48,913 shares
-18%
21Weak
SLDBsell 710b5-1
Solid Biosciences Inc.
Ilan Ganot
director
$46k
7,205 shares
-22%
24Weak
SLDBsell 710b5-1
Solid Biosciences Inc.
Jessie Hanrahan
Chief Regulatory Officer
$80k
12,348 shares
-15%

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.

David T Howton sold $25k of SLDB | InsiderTell