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sellWeak10b5-1 plan

Matthew Tappin sold $9,895 of STEM

President, Software Division at STEM, INC.. 21,987 shares at an average of $0.45, traded May 30, 2025, filed Jun 18, 2025.

Warning score
0
Value
$9,895
21,987 shares
Holdings after
37,458
-37% from before
From 52-week low
+66%
low $5.90, close $9.78
From 52-week high
-60%
high $24.40, as of May 30, 2025

Score components

  • Role
    President
    +20
  • Trade size
    $10k at market
    0
  • Share of holdings sold
    Sold 37% of holdings
    +10
  • Cluster
    No other insider selling within 14 days
    0
  • 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 +54.8%, 3m +101.8%, 6m +82.6%.

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.

STEMOct 12, 2026 · close 4.06
Since filing Jun 18, 2025: -53.4%SPY +32.4% · excess -85.8%

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 0000950170-25-088043, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
May 29, 2025MOption exercise
Common Stock, Par Value $0.0001 Per Share10b5-1
+2,775$0.00$059,445Jun 18, 2025
May 30, 2025SOpen-market sale
Common Stock, Par Value $0.0001 Per Share10b5-1
-1,164$0.45$52558,281Jun 18, 2025
Jun 16, 2025SOpen-market sale
Common Stock, Par Value $0.0001 Per Share10b5-1
-20,823$0.45$9,37037,458Jun 18, 2025
May 29, 2025MOption exercise
Restricted Stock Unitderivative10b5-1
-2,775$0.00$0396,784Jun 18, 2025

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%
17Weak
STEMsell
STEM, INC.
Brian Musfeldt
Chief Financial Officer
$6,086
996 shares
-30%
20Weak
STEMsell 4
STEM, INC.
Michael James Carlson
President, Managed Services
$11k
1,347 shares
-5%
15Weak
STEMsell 4
STEM, INC.
Saul R. Laureles
Chief Legal Officer
$5,299
675 shares
-2%
25Weak
STEMsell 4
STEM, INC.
Arun Narayanan
Chief Executive Officer
$16k
1,996 shares
-9%
20Weak
STEMsell 4
STEM, INC.
Matthew Tappin
President, Software Products
$7,819
996 shares
-9%
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%

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 Tappin sold $9,895 of STEM | InsiderTell