Skip to content
sellWeak cluster of 410b5-1 plan

Matthew R Henn sold $22k of MCRB

See Remarks at Seres Therapeutics, Inc.. 1,257 shares at an average of $17.30, traded Nov 15, 2025, filed Nov 18, 2025.

Warning score
0
Value
$22k
1,257 shares
Holdings after
7,527
-14% from before
From 52-week low
+146%
low $6.77, close $16.66
From 52-week high
-27%
high $22.85, as of Nov 14, 2025

Score components

  • Role
    Officer
    +15
  • Trade size
    $22k at market
    0
  • Share of holdings sold
    Sold 14% 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 -38.2%, 3m -66.5%, 6m -69.9%.

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.

MCRBOct 9, 2026 · close 2.71
Since filing Nov 18, 2025: -89.0%SPY +19.2% · excess -108.3%

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 0001193125-25-286226, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Nov 15, 2025MOption exercise
Common Stock10b5-1
+3,998--8,546Nov 18, 2025
Nov 15, 2025MOption exercise
Common Stock10b5-1
+140--8,686Nov 18, 2025
Nov 15, 2025MOption exercise
Common Stock10b5-1
+98--8,784Nov 18, 2025
Nov 15, 2025SOpen-market sale
Common Stock10b5-1
-1,257$17.30$22k7,527Nov 18, 2025
Nov 15, 2025MOption exercise
Restricted Stock Unitsderivative10b5-1
-3,998$0.00$00Nov 18, 2025
Nov 15, 2025MOption exercise
Restricted Stock Unitsderivative10b5-1
-140$0.00$0704Nov 18, 2025
Nov 15, 2025MOption exercise
Restricted Stock Unitsderivative10b5-1
-98$0.00$0878Nov 18, 2025

Related signals

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

ScoreCompanyInsiderValueHoldingsFiled
15Weak
MCRBsell 3
Seres Therapeutics, Inc.
Kelly Brady
See Remarks
$444
59 shares
-1%
0Weak
MCRBsell 310b5-1
Seres Therapeutics, Inc.
Thomas DesRosier
See Remarks
$595
79 shares
-1%
0Weak
MCRBsell 310b5-1
Seres Therapeutics, Inc.
Matthew R Henn
See Remarks
$580
77 shares
-1%
0Weak
MCRBsell 410b5-1
Seres Therapeutics, Inc.
Thomas DesRosier
See Remarks
$661
78 shares
-1%
0Weak
MCRBsell 410b5-1
Seres Therapeutics, Inc.
Matthew R Henn
See Remarks
$754
89 shares
-1%
0Weak
MCRBsell 410b5-1
Seres Therapeutics, Inc.
Eric D. Shaff
CEO and President
$2,194
259 shares
-2%
0Weak
MCRBsell 410b5-1
Seres Therapeutics, Inc.
Teresa L. Young
See Remarks
$635
75 shares
-1%
0Weak
MCRBsell 410b5-1
Seres Therapeutics, Inc.
Thomas DesRosier
See Remarks
$1,315
76 shares
-1%
0Weak
MCRBsell 410b5-1
Seres Therapeutics, Inc.
Eric D. Shaff
CEO and President
$3,754
217 shares
-2%
0Weak
MCRBsell 410b5-1
Seres Therapeutics, Inc.
Teresa L. Young
See Remarks
$18k
1,042 shares
-11%

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.

Matthew R Henn sold $22k of MCRB | InsiderTell