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sellWeak cluster of 4

Matthew Tappin sold $7,284 of STEM

President, Software Products at STEM, INC.. 655 shares at an average of $11.12, traded Mar 10, 2026, filed Mar 10, 2026.

Warning score
25
Value
$7,284
655 shares
Holdings after
3,225
-17% from before
From 52-week low
+84%
low $5.90, close $10.86
From 52-week high
-64%
high $29.79, as of Mar 10, 2026

Score components

  • Role
    President
    +20
  • Trade size
    $7k at market
    0
  • Share of holdings sold
    Sold 17% 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

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 -10.4%, 3m -29.1%, 6m -48.1%.

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.

STEMOct 9, 2026 · close 4.16
Since filing Mar 10, 2026: -61.7%SPY +15.9% · excess -77.6%

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 0001986259-26-000012, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Mar 7, 2026MOption exercise
Common Stock, Par Value $0.0001 Per Share
+1,458--3,880Mar 10, 2026
Mar 10, 2026SOpen-market sale
Common Stock, Par Value $0.0001 Per Share
-655$11.12$7,2843,225Mar 10, 2026
Mar 7, 2026MOption exercise
Restricted Stock Unitderivative
-1,458$0.00$01,459Mar 10, 2026

Related signals

Other insiders at STEM, INC. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
5Weak
STEMsell
STEM, INC.
Michael James Carlson
President, Managed Services
$682
146 shares
-1%
20Weak
STEMsell 410b5-1
STEM, INC.
Matthew Tappin
President, Software Products
$4,354
402 shares
-12%
20Weak
STEMsell 4
STEM, INC.
Michael James Carlson
President, Managed Services
$23k
2,079 shares
-10%
15Weak
STEMsell 4
STEM, INC.
Saul R. Laureles
Chief Legal Officer
$10k
942 shares
-3%
42Moderate
STEMsell 4
STEM, INC.
Arun Narayanan
Chief Executive Officer
$57k
5,145 shares
-28%
30Weak
STEMsell 4
STEM, INC.
Saul R. Laureles
Chief Legal Officer
$2,824
292 shares
-1%
40Moderate
STEMsell 4
STEM, INC.
Matthew Tappin
President, Software Products
$4,751
485 shares
-17%
33Weak
STEMsell 2
STEM, INC.
Matthew Tappin
President, Software Products
$4,172
366 shares
-14%
59Moderate
STEMsell 2
STEM, INC.
Matthew Tappin
President, Software Products
$170k
9,584 shares
-84%
50Moderate
STEMsell 2
STEM, INC.
Rahul Shukla
Chief Accounting Officer
$60k
3,674 shares
-100%

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.