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sellNotable cluster of 2

Michael B. Petras Jr. sold $21M of SHC

Executive Chairman at Sotera Health Co. 1,144,515 shares at an average of $18.50, traded Aug 17, 2026, filed Aug 19, 2026.

Warning score
73
Value
$21M
1,144,515 shares
Holdings after
3,969,393
-165% from before
From 52-week low
+43%
low $13.13, close $18.80
From 52-week high
-3%
high $19.35, as of Aug 17, 2026

Score components

  • Role
    Chair
    +20
  • Trade size
    $21.2M at market
    +25
  • Share of holdings sold
    Sold 100% of holdings
    +20
  • Cluster
    2 insiders selling within 14 days
    +8

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.

SHCOct 13, 2026 · close 18.21
Since filing Aug 19, 2026: -4.2%SPY +1.4% · excess -5.6%

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 0001193125-26-356962, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Aug 17, 2026SOpen-market sale
Common Stock, $0.01 par value per share ("Common Stock")
-294,515$18.50$5.4M397,912Aug 19, 2026
Aug 17, 2026SOpen-market sale
Common Stockindirect: By Grantor Trust
-850,000$18.50$16M3,969,393Aug 19, 2026

Related signals

Other insiders at Sotera Health Co and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
63Notable
SHCsell 2
Sotera Health Co
Michael P Rutz
President of Sterigenics
$2.8M
150,000 shares
-31%
68Notable
SHCsell 2
Sotera Health Co
Warburg Pincus & Co.
director, owner
$290M
19,102,952 shares
-100%
68Notable
SHCsell 2
Sotera Health Co
Gtcr Investment Xi LLC
director, owner
$193M
12,735,301 shares
-100%
68Notable
SHCsell 2
Sotera Health Co
Warburg Pincus & Co.
director, owner
$290M
19,102,952 shares
-100%
58Moderate
SHCsell 2
Sotera Health Co
Warburg Pincus & Co.
director, owner
$229M
15,000,000 shares
-44%
58Moderate
SHCsell 2
Sotera Health Co
Gtcr Investment Xi LLC
director, owner
$153M
10,000,000 shares
-44%
58Moderate
SHCsell 2
Sotera Health Co
Warburg Pincus & Co.
director, owner
$229M
15,000,000 shares
-44%
85Strong
SHCsell 3
Sotera Health Co
Michael B. Petras Jr.
Chairman & CEO
$12M
750,000 shares
-86%
60Notable
SHCsell 3
Sotera Health Co
Gtcr Investment Xi LLC
director, owner
$106M
6,480,000 shares
-22%
60Notable
SHCsell 3
Sotera Health Co
Warburg Pincus & Co.
director, owner
$159M
9,720,000 shares
-22%

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.

Michael B. Petras Jr. sold $21M of SHC | InsiderTell