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sellWeak cluster of 310b5-1 plan

Mark Reinstra sold $259k of RBLX

Chief Legal Off. & Corp. Sec. at Roblox Corp. 5,773 shares at an average of $44.80, traded Sep 8, 2026, filed Sep 9, 2026.

Warning score
23
Value
$259k
5,773 shares
Holdings after
392,291
-1% from before
From 52-week low
+26%
low $35.54, close $44.82
From 52-week high
-68%
high $141.56, as of Sep 8, 2026

Score components

  • Role
    Officer
    +15
  • Trade size
    $259k at market
    +13
  • Share of holdings sold
    Sold 1.5% of holdings
    0
  • Cluster
    3 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.

RBLXOct 9, 2026 · close 48.09
Since filing Sep 9, 2026: +8.0%SPY +2.4% · 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 0001315098-26-000184, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Sep 8, 2026SOpen-market sale
Class A Common Stock10b5-1
-1,920$44.30$85k396,14433 d ago
Sep 8, 2026SOpen-market sale
Class A Common Stock10b5-1
-3,753$45.03$169k392,39133 d ago
Sep 8, 2026SOpen-market sale
Class A Common Stock10b5-1
-100$45.73$4,573392,29133 d ago

Related signals

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

ScoreCompanyInsiderValueHoldingsFiled
16Weak
RBLXsell 210b5-1
Roblox Corp
Mark Reinstra
Chief Legal Off. & Corp. Sec.
$250k
5,666 shares
-1%
24Weak
RBLXsell 210b5-1
Roblox Corp
Gregory Baszucki
director
$714k
16,666 shares
-0%
30Weak
RBLXsell 310b5-1
Roblox Corp
Gregory Baszucki
director
$674k
16,666 shares
-0%
30Weak
RBLXsell 3
Roblox Corp
Andrea L Wong
director
$23k
562 shares
-1%
40Moderate
RBLXsell 410b5-1
Roblox Corp
David Baszucki
President & CEO
$18M
167,408 shares
-48%
50Moderate
RBLXsell 410b5-1
Roblox Corp
David Baszucki
President & CEO
$30M
288,654 shares
-71%
30Weak
RBLXsell 410b5-1
Roblox Corp
Matthew D Kaufman
Chief Safety Officer
$620k
6,000 shares
-2%
50Moderate
RBLXsell 510b5-1
Roblox Corp
David Baszucki
President & CEO
$63M
628,674 shares
-94%
50Moderate
RBLXsell 610b5-1
Roblox Corp
David Baszucki
President & CEO
$32M
321,324 shares
-72%
24Weak
RBLXsell 610b5-1
Roblox Corp
Manuel Bronstein
Chief Product Officer
$284k
2,844 shares
-1%

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.

Mark Reinstra sold $259k of RBLX | InsiderTell