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sellNotable cluster of 4

Joseph E Gilliam sold $2.8M of GKOS

PRESIDENT & COO at GLAUKOS Corp. 19,573 shares at an average of $143.54, traded May 1, 2026, filed May 4, 2026.

Warning score
65
Value
$2.8M
19,573 shares
Holdings after
73,419
-21% from before
From 52-week low
+88%
low $74.67, close $140.22
From 52-week high
-2%
high $143.67, as of May 1, 2026

Score components

  • Role
    President
    +20
  • Trade size
    $2.8M at market
    +25
  • Share of holdings sold
    Sold 21% of holdings
    +5
  • Cluster
    4 insiders selling within 14 days
    +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 -16.3%, 3m +25.8%, 6m -.

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.

GKOSOct 12, 2026 · close 168.02
Since filing May 4, 2026: +23.7%SPY +8.9% · excess +14.8%

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 0001705850-26-000018, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
May 1, 2026SOpen-market sale
Common Stock
-19,573$143.54$2.8M73,419May 4, 2026

Related signals

Other insiders at GLAUKOS Corp and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
8Weak
GKOSsell10b5-1
GLAUKOS Corp
Tomas Navratil
CHIEF DEVELOPMENT OFFICER
$251k
1,527 shares
-2%
8Weak
GKOSsell10b5-1
GLAUKOS Corp
Tomas Navratil
CHIEF DEVELOPMENT OFFICER
$249k
1,615 shares
-2%
8Weak
GKOSsell10b5-1
GLAUKOS Corp
Tomas Navratil
CHIEF DEVELOPMENT OFFICER
$243k
1,457 shares
-2%
53Moderate
GKOSsell 2
GLAUKOS Corp
Tomas Navratil
CHIEF DEVELOPMENT OFFICER
$2.5M
13,744 shares
-16%
33Weak
GKOSsell 4
GLAUKOS Corp
Gilbert H Kliman
director
$475k
2,500 shares
-6%
55Moderate
GKOSsell 4
GLAUKOS Corp
Joseph E Gilliam
PRESIDENT & COO
$11M
60,000 shares
-45%
37Weak
GKOSsell 410b5-1
GLAUKOS Corp
Alex R. Thurman
SVP & CHIEF FINANCIAL OFFICER
$3.6M
20,000 shares
-31%
39Weak
GKOSsell 3
GLAUKOS Corp
Leana Wen
director
$88k
525 shares
-2%
17Weak
GKOSsell10b5-1
GLAUKOS Corp
Alex R. Thurman
SVP & CHIEF FINANCIAL OFFICER
$1.6M
10,000 shares
-19%
25Weak
GKOSsell 210b5-1
GLAUKOS Corp
Alex R. Thurman
SVP & CHIEF FINANCIAL OFFICER
$1.6M
10,000 shares
-19%

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.

Joseph E Gilliam sold $2.8M of GKOS | InsiderTell