NET

Cloudflare, Inc.

NYSETechnologyServices-Prepackaged Software

Insider activity for last month from 08/03 to 09/03. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.

Latest filingAug 21, 2026Most recent Form 4
Total buying$00 buys
Total selling$3.47B53 sells
Net open-market-$3.47B5 insiders
Open-market mix
Buy vs sell distribution by transaction count
53 transactions
0 buys0%·100%53 sells

Insider activity report

Monthly open-market purchase and sale counts
Buys Sells
55280-28-55transactionsAug 2026 sells: 53 transactions · $3.47B53AugSep

Transaction codes

By Form 4 transaction code in selected period
78transactions
  • S · Open-market sells · dominant53 · 68%
  • M · Option exercise12 · 15%
  • C · Code C8 · 10%
  • F · Tax withholding5 · 6%

Activity by reported role

A joint filing can contribute to multiple roles
79transactions
  • PRES · dominant39 · 49%
  • CAO15 · 19%
  • Chief financial officer12 · 15%
  • CLO11 · 14%
  • Chief executive officer1 · 1%
  • CHAIR1 · 1%

Distinct insiders active

Reporting-owner CIKs by month · peak Aug 2026 (5)
Aug 2026Sep 2026
5distinct insiders in 2 months

Reported Holdings After

Separated by insider, security, and ownership type
Zatlyn MichelleClass A Common Stock · Indirect · See footnote
102.8k69.8kAug 19, 2026 · 69,775 shares owned afterAug 19, 2026 · 69,778 shares owned afterAug 19, 2026 · 70,995 shares owned afterAug 19, 2026 · 71,819 shares owned afterAug 19, 2026 · 73,373 shares owned afterAug 19, 2026 · 80,939 shares owned afterAug 19, 2026 · 91,543 shares owned afterAug 19, 2026 · 92,963 shares owned afterAug 19, 2026 · 94,509 shares owned afterAug 19, 2026 · 98,480 shares owned afterAug 19, 2026 · 102,778 shares owned afterAug 20, 2026 · 87,125 shares owned afterAug 20, 2026 · 95,771 shares owned afterAug 20, 2026 · 69,775 shares owned afterAug 20, 2026 · 102,778 shares owned afterAug 20, 2026 · 70,534 shares owned afterAug 20, 2026 · 70,670 shares owned afterAug 20, 2026 · 73,214 shares owned afterAug 20, 2026 · 75,549 shares owned afterAug 20, 2026 · 78,658 shares owned afterAug 21, 2026 · 76,080 shares owned afterAug 21, 2026 · 100,572 shares owned afterAug 21, 2026 · 102,778 shares owned afterAug 21, 2026 · 69,775 shares owned afterAug 21, 2026 · 69,865 shares owned afterAug 21, 2026 · 70,821 shares owned afterAug 21, 2026 · 91,582 shares owned afterAug 21, 2026 · 87,346 shares owned afterAug 21, 2026 · 81,704 shares owned afterAug 19, 2026Aug 21, 2026
81,704Aug 21, 2026
Riley JanelClass A Common Stock · Direct
46.7k41.5kAug 15, 2026 · 45,028 shares owned afterAug 17, 2026 · 45,028 shares owned afterAug 17, 2026 · 45,458 shares owned afterAug 17, 2026 · 45,648 shares owned afterAug 17, 2026 · 45,828 shares owned afterAug 17, 2026 · 45,968 shares owned afterAug 17, 2026 · 46,300 shares owned afterAug 17, 2026 · 46,695 shares owned afterAug 17, 2026 · 45,298 shares owned afterAug 18, 2026 · 43,863 shares owned afterAug 18, 2026 · 44,761 shares owned afterAug 18, 2026 · 42,647 shares owned afterAug 18, 2026 · 42,047 shares owned afterAug 18, 2026 · 41,547 shares owned afterAug 15, 2026Aug 18, 2026
41,547Aug 18, 2026
Starzak Alissa MichelleClass A Common Stock · Direct
118.0k112.1kAug 15, 2026 · 114,620 shares owned afterAug 17, 2026 · 115,019 shares owned afterAug 17, 2026 · 115,319 shares owned afterAug 17, 2026 · 115,779 shares owned afterAug 17, 2026 · 116,053 shares owned afterAug 17, 2026 · 116,403 shares owned afterAug 17, 2026 · 116,988 shares owned afterAug 17, 2026 · 117,953 shares owned afterAug 17, 2026 · 114,620 shares owned afterAug 18, 2026 · 112,082 shares owned afterAug 15, 2026Aug 18, 2026
112,082Aug 18, 2026
Seifert Thomas JClass A Common Stock · Direct
120.8k110.8kAug 15, 2026 · 110,846 shares owned afterAug 17, 2026 · 110,946 shares owned afterAug 17, 2026 · 111,146 shares owned afterAug 17, 2026 · 111,446 shares owned afterAug 17, 2026 · 114,546 shares owned afterAug 17, 2026 · 117,002 shares owned afterAug 17, 2026 · 120,846 shares owned afterAug 17, 2026 · 119,946 shares owned afterAug 17, 2026 · 110,846 shares owned afterAug 15, 2026Aug 17, 2026
110,846Aug 17, 2026
Zatlyn MichelleClass B Common Stock · Direct
33.0k0Aug 19, 2026 · 0 shares owned afterAug 19, 2026 · 33,003 shares owned afterAug 20, 2026 · 33,003 shares owned afterAug 20, 2026 · 0 shares owned afterAug 21, 2026 · 0 shares owned afterAug 21, 2026 · 33,003 shares owned afterAug 19, 2026Aug 21, 2026
33,003Aug 21, 2026
Zatlyn MichelleEmployee Stock Option (right to buy) · Direct
1.2M1.1MAug 19, 2026 · 1,155,105 shares owned afterAug 20, 2026 · 1,122,102 shares owned afterAug 21, 2026 · 1,089,099 shares owned afterAug 19, 2026Aug 21, 2026
1,089,099Aug 21, 2026
Seifert Thomas JClass B Common Stock · Direct
18.9k8.9kAug 17, 2026 · 8,925 shares owned afterAug 17, 2026 · 18,925 shares owned afterAug 17, 2026Aug 17, 2026
18,925Aug 17, 2026
Zatlyn MichelleClass A Common Stock · Direct
315.3k315.3kAug 15, 2026 · 315,300 shares owned afterAug 15, 2026Aug 15, 2026
315,300Aug 15, 2026

These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.

Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells red
0 active days
Aug 03Sep 03
LessMore

Filing detail checks

Secondary metrics for the selected period
Largest buy-
Largest sale$313M
10b5-1 detected73
Amended rows0

NET transaction history

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Cloudflare, Inc. Insider Activity FAQ

SEC Form 4 context

Who recently reported transactions at Cloudflare, Inc.?

Zatlyn Michelle, Starzak Alissa Michelle, Riley Janel, SEIFERT THOMAS J, Prince Matthew.

When was the latest reported open-market purchase?

No code-P purchase is available for this period.

When was the latest reported open-market sale?

Zatlyn Michelle reported a sale on Aug 21, 2026 valued at $2.53M. Read the SEC filing.

What is the recent purchase and sale balance?

Net open-market selling in the selected period was $34,747,868.42. Sales can occur for many non-investment reasons.

Where can I see the original SEC filing?

Every transaction row and latest-activity fact links to its original SEC filing.

What do these Form 4 transaction codes mean?

P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.