Massivemarkets

SEC Form 4

Roblox Corporation (RBLX) insider trading

In the 12 months to Oct 26, 2026, 10 RBLX insiders reported open-market sales of $54.7M across 34 filings; one director bought $950.

Latest filing · Last 12 months · Source: SEC EDGAR · How we count

Open-market sales
$54.7M
34 filings · 10 insiders
Open-market purchases
$950
1 filing · Gina Mastantuono, Director
Pre-arranged sales (10b5-1)
29 of 34
$46.7M of $54.7M sold (85%)

Who traded RBLX, and when

  • Purchase
  • Sale
  • Sale, pre-arranged (10b5-1)

RBLX daily close from Oct 27, 2025 to Oct 26, 2026, between $35.54 and $133.74, last $53.47. 34 sale and 1 purchase filings by 10 insiders, marked at their filing dates. Anthony P. Lee, Director: sold $18.3M across 4 filings, first filed Nov 5, 2025, last Jan 14, 2026. David Baszucki, President & CEO: sold $17.8M across 3 filings, first filed Nov 13, 2025, last Jan 9, 2026. Gregory Baszucki, Director: sold $6.6M across 8 filings, first filed Mar 3, 2026, last Oct 2, 2026. Mark Reinstra, Chief Legal Off. & Corp. Sec.: sold $5.6M across 8 filings, first filed Nov 7, 2025, last Oct 6, 2026. Arvind Chakravarthy, Chief People & Systems Officer: sold $4.1M across 1 filing, first filed Feb 11, 2026, last Feb 11, 2026. Matthew D. Kaufman, Chief Safety Officer: sold $1.9M across 3 filings, first filed Nov 5, 2025, last Nov 24, 2025. Gina Mastantuono, Director: sold $790 and bought $950 across 2 filings, first filed Feb 13, 2026, last Feb 13, 2026. 3 others: sold $469.7K across 6 filings, first filed Feb 26, 2026, last Sep 1, 2026.

Largest mark · tap a row for others

David Baszucki · President & CEO

Sale $6,992,961

66,896 shares at $104.53 avg

Filed Nov 13, 2025 · traded Nov 11

Pre-arranged (10b5-1) · close on filing date $101.27

RBLX daily closelast $53.47

Anthony P. Lee · Director

$18.3M sold

David Baszucki · President & CEO

$17.8M sold

Gregory Baszucki · Director

$6.6M sold

Mark Reinstra · Chief Legal Off. & Corp. Sec.

$5.6M sold

Arvind Chakravarthy · Chief People & Systems Officer

$4.1M sold

Matthew D. Kaufman · Chief Safety Officer

$1.9M sold

Gina Mastantuono · Director

$790 sold$950 bought

3 others

$469.7K sold
One row per insider, smaller filers combined; marks sit at the SEC filing date, sized by dollar value.

Open-market trades

35 filings in the last 12 months
Other insider activity (not market trades) · 136 records
  • Option exercises4 records
  • Tax withholding (sold to cover)85 records
  • Grants and awards18 records
  • Gifts16 records
  • Other13 records

Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.

How to read this page

Open-market purchase or sale
A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
Pre-arranged (10b5-1)
The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
Filing date
Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.

Frequently asked questions

Has the Roblox Corporation's CEO sold stock?

Yes. David Baszucki (CEO) sold 200,688 shares ($17.8M) between Nov 2025 and Jan 2026, all under a pre-arranged 10b5-1 plan.

How current is RBLX’s insider data?

These are RBLX Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.

What counts as an open-market buy or sell?

Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.

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Track RBLX insider trades with your agent

This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:

Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for RBLX every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.

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