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sellWeak cluster of 410b5-1 plan

Heather Kiessling sold $145k of ASPI

Chief Financial Officer at ASP Isotopes Inc.. 23,124 shares at an average of $6.28, traded Jul 1, 2026, filed Jul 2, 2026.

Warning score
28
Value
$145k
23,124 shares
Holdings after
1,526,252
-1% from before
From 52-week low
+52%
low $4.07, close $6.17
From 52-week high
-56%
high $14.05, as of Jul 1, 2026

Score components

  • Role
    CFO
    +22
  • Trade size
    $145k at market
    +11
  • Share of holdings sold
    Sold 1.5% of holdings
    0
  • Cluster
    4 insiders selling within 14 days
    +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.

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.

ASPIOct 9, 2026 · close 2.65
Since filing Jul 2, 2026: -52.9%SPY +4.8% · excess -57.7%

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 0001477932-26-004177, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Jul 1, 2026SOpen-market sale
Common Stock10b5-1
-23,124$6.28$145k1,526,252Jul 2, 2026

Related signals

Other insiders at ASP Isotopes Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
44Moderate
ASPIbuy
ASP Isotopes Inc.
Robert John Andrew Ryan
director
$40k
15,000 shares
+2%
33Weak
ASPIbuy
ASP Isotopes Inc.
Robert John Andrew Ryan
director
$22k
8,000 shares
+1%
21Weak
ASPIsell 310b5-1
ASP Isotopes Inc.
Robert Ainscow
COO
$36k
8,438 shares
-0%
45Moderate
ASPIsell 310b5-1
ASP Isotopes Inc.
Paul Elliot Mann
Chairman and CEO
$999k
251,275 shares
-3%
25Weak
ASPIsell 310b5-1
ASP Isotopes Inc.
Robert Ainscow
COO
$98k
25,000 shares
-1%
39Weak
ASPIsell 3
ASP Isotopes Inc.
Donald George Ainscow
EVP, Gen Counsel, Secretary
$92k
23,678 shares
-3%
55Moderate
ASPIsell 4
ASP Isotopes Inc.
Donald George Ainscow
EVP, Gen Counsel, Secretary
$614k
100,000 shares
-11%
52Moderate
ASPIsell 4
ASP Isotopes Inc.
Michael Gorley
director
$188k
30,000 shares
-25%
55Moderate
ASPIsell 4
ASP Isotopes Inc.
Todd Wider
director
$619k
100,000 shares
-13%
15Weak
ASPIsell 210b5-1
ASP Isotopes Inc.
Robert Ainscow
COO
$59k
8,438 shares
-0%

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.

Heather Kiessling sold $145k of ASPI | InsiderTell