Skip to content
sellWeak cluster of 210b5-1 plan

Steven Denbaars sold $506k of ALMU

director at Aeluma, Inc.. 25,000 shares at an average of $20.23, traded May 19, 2026, filed May 21, 2026.

Warning score
21
Value
$506k
25,000 shares
Holdings after
370,209
-6% from before
From 52-week low
+104%
low $10.73, close $21.93
From 52-week high
-30%
high $31.49, as of May 19, 2026

Score components

  • Role
    Director
    +15
  • Trade size
    $506k at market
    +18
  • Share of holdings sold
    Sold 6.3% of holdings
    0
  • Cluster
    2 insiders selling within 14 days
    +8
  • 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.

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.

ALMUOct 12, 2026 · close 10.42
Since filing May 21, 2026: -55.3%SPY +5.3% · excess -60.6%

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 0001700533-26-000008, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
May 19, 2026SOpen-market sale
Common Stock10b5-1
-7,415$19.56$145k387,794May 21, 2026
May 19, 2026SOpen-market sale
Common Stock10b5-1
-5,085$20.61$105k382,709May 21, 2026
May 20, 2026SOpen-market sale
Common Stock10b5-1
-11,558$20.40$236k371,151May 21, 2026
May 20, 2026SOpen-market sale
Common Stock10b5-1
-942$21.30$20k370,209May 21, 2026

Related signals

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

ScoreCompanyInsiderValueHoldingsFiled
30Weak
ALMUsell10b5-1
Aeluma, Inc.
Jonathan Klamkin
Chief Executive Officer
$1.3M
100,000 shares
-8%
30Weak
ALMUsell
Aeluma, Inc.
Steven Denbaars
director
$346k
25,000 shares
-7%
10Weak
ALMUsell10b5-1
Aeluma, Inc.
Steven Denbaars
director
$346k
25,000 shares
-7%
40Moderate
ALMUsell10b5-1
Aeluma, Inc.
Jonathan Klamkin
Chief Executive Officer
$335k
20,000 shares
-89%
41Moderate
ALMUsell10b5-1
Aeluma, Inc.
Jonathan Klamkin
Chief Executive Officer
$422k
20,000 shares
-89%
51Moderate
ALMUsell 210b5-1
Aeluma, Inc.
Jonathan Klamkin
Chief Executive Officer
$501k
20,000 shares
-89%
43Moderate
ALMUsell10b5-1
Aeluma, Inc.
Jonathan Klamkin
Chief Executive Officer
$499k
20,000 shares
-89%
18Weak
ALMUsell10b5-1
Aeluma, Inc.
Jonathan Klamkin
Chief Executive Officer
$262k
20,000 shares
-1%
37Weak
ALMUsell 210b5-1
Aeluma, Inc.
Jonathan Klamkin
Chief Executive Officer
$903k
50,000 shares
-3%
19Weak
ALMUsell 210b5-1
Aeluma, Inc.
Steven Denbaars
director
$418k
25,000 shares
-6%

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.

Steven Denbaars sold $506k of ALMU | InsiderTell