Massivemarkets

SEC Form 4

Cloudflare, Inc. (NET) insider trading

In the 12 months to Oct 23, 2026, 10 NET insiders reported open-market sales of $700.0M across 90 filings; no open-market purchases were filed.

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

Open-market sales
$700.0M
90 filings · 10 insiders
Open-market purchases
$0
0 filings
Pre-arranged sales (10b5-1)
86 of 90
$699.4M of $700.0M sold (100%)

Who traded NET, and when

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

NET daily close from Oct 23, 2025 to Oct 23, 2026, between $160.19 and $360.93, last $321.79. 90 sale and 0 purchase filings by 10 insiders, marked at their filing dates. Matthew Prince, CEO & Board Co-Chair: sold $339.6M across 17 filings, first filed Nov 19, 2025, last Aug 5, 2026. Michelle Zatlyn, President and Board Co-Chair → PRESIDENT & BOARD CO-CHAIR: sold $247.2M across 12 filings, first filed Nov 24, 2025, last Oct 7, 2026. Thomas J. Seifert, Chief Financial Officer: sold $57.5M across 13 filings, first filed Nov 21, 2025, last Oct 19, 2026. Carl Ledbetter, Director: sold $30.8M across 14 filings, first filed Nov 17, 2025, last Oct 19, 2026. Janel Riley, Chief Accounting Officer → CHIEF ACCOUNTING OFFICER: sold $8.8M across 5 filings, first filed Nov 18, 2025, last Aug 19, 2026. John Graham-Cumming, Director: sold $5.8M across 10 filings, first filed Nov 3, 2025, last Aug 11, 2026. 4 others: sold $10.4M across 19 filings, first filed Nov 3, 2025, last Aug 19, 2026.

Largest mark · tap a row for others

Matthew Prince · CEO & Board Co-Chair

Filing 1 of 4 within a week · $45,959,037 total

Sale $14,846,244

52,383 shares at $283.42 avg

Filed Aug 5, 2026 · traded Aug 3

Pre-arranged (10b5-1) · close on filing date $292.96

NET daily closelast $321.79

Matthew Prince · CEO & Board Co-Chair

$339.6M sold

Michelle Zatlyn · President and Board Co-Chair → PRESIDENT & BOARD CO-CHAIR

$247.2M sold

Thomas J. Seifert · Chief Financial Officer

$57.5M sold

Carl Ledbetter · Director

$30.8M sold

Janel Riley · Chief Accounting Officer → CHIEF ACCOUNTING OFFICER

$8.8M sold

John Graham-Cumming · Director

$5.8M sold

4 others

$10.4M sold
One row per insider, smaller filers combined; marks sit at the SEC filing date, sized by dollar value.

Has Cloudflare, Inc.'s CEO sold stock?

Yes. Matthew Prince (CEO) sold 1,571,553 shares ($339.6M) between Nov 2025 and Aug 2026, all under a pre-arranged 10b5-1 plan.

Open-market trades

90 filings in the last 12 months
InsiderRoleSoldBoughtFilingsPre-arranged (10b5-1)Last filed
Matthew PrinceCEO & Board Co-Chair$339.6M—17100% of sales
Michelle ZatlynPresident and Board Co-Chair → PRESIDENT & BOARD CO-CHAIR$247.2M—12100% of sales
Thomas J. SeifertChief Financial Officer$57.5M—13100% of sales
Carl LedbetterDirector$30.8M—14100% of sales
Janel RileyChief Accounting Officer → CHIEF ACCOUNTING OFFICER$8.8M—5100% of sales
John Graham-CummingDirector$5.8M—10100% of sales
Alissa Michelle StarzakChief Legal Officer$5.3M—2100% of sales
Douglas James KramerChief Legal Officer → CHIEF LEGAL OFFICER$3.7M—486% of sales
Katrin SuderDirector$879.2K—3100% of sales
Mark J. HawkinsDirector$512.2K—1086% of sales
Other insider activity (not market trades) · 142 records
  • Option exercises22 records
  • Tax withholding26 records
  • Grants and awards12 records
  • Gifts1 record
  • Other81 records

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

Build this yourself

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

Agent prompt

Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for NET 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.

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.
Role
The title on each filing. Someone whose title changed shows more than one.
Filing date
Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.