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sellWeak cluster of 510b5-1 plan

Thomas J Seifert sold $2.1M of NET

Chief Financial Officer at Cloudflare, Inc.. 15,000 shares at an average of $141.77, traded Mar 5, 2025, filed Mar 6, 2025.

Warning score
27
Value
$2.1M
15,000 shares
Holdings after
293,582
-5% from before
From 52-week low
-
no price yet
From 52-week high
-
no price yet

Score components

  • Role
    CFO
    +22
  • Trade size
    $2.1M at market
    +25
  • Share of holdings sold
    Sold 4.9% of holdings
    0
  • Cluster
    5 insiders selling within 14 days
    +15
  • Exercise and sell
    Shares came from an option exercise in the same filing
    -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.

NETOct 9, 2026 · close 360.93
Since filing Mar 6, 2025: +175.5%SPY +38.6% · excess +136.9%

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 0001477333-25-000051, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Mar 5, 2025CConversion
Class A Common Stock10b5-1
+15,000--308,582Mar 6, 2025
Mar 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-300$138.22$41k308,282Mar 6, 2025
Mar 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-2,791$139.47$389k305,491Mar 6, 2025
Mar 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-2,770$140.54$389k302,721Mar 6, 2025
Mar 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-1,700$141.40$240k301,021Mar 6, 2025
Mar 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-5,094$143.15$729k295,927Mar 6, 2025
Mar 5, 2025SOpen-market sale
Class A Common Stock10b5-1
-2,345$143.67$337k293,582Mar 6, 2025
Mar 5, 2025MOption exercise
Employee Stock Option (right to buy)derivative10b5-1
-15,000$0.00$0190,341Mar 6, 2025
Mar 5, 2025MOption exercise
Class B Common Stockderivative10b5-1
+15,000$0.00$023,925Mar 6, 2025
Mar 5, 2025CConversion
Class B Common Stockderivative10b5-1
-15,000$0.00$08,925Mar 6, 2025

Related signals

Other insiders at Cloudflare, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
38Weak
NETsell 210b5-1
Cloudflare, Inc.
Michelle Zatlyn
President and Board Co-Chair
$35M
99,009 shares
-96%
35Weak
NETsell 310b5-1
Cloudflare, Inc.
Carl Ledbetter
director
$1.8M
5,000 shares
-1%
27Weak
NETsell 310b5-1
Cloudflare, Inc.
Thomas J Seifert
Chief Financial Officer
$3.3M
10,000 shares
-8%
35Weak
NETsell 310b5-1
Cloudflare, Inc.
Carl Ledbetter
director
$1.6M
5,000 shares
-1%
45Moderate
NETsell 310b5-1
Cloudflare, Inc.
Michelle Zatlyn
PRESIDENT & BOARD CO-CHAIR
$28M
99,009 shares
-96%
45Moderate
NETsell 310b5-1
Cloudflare, Inc.
Michelle Zatlyn
President and Board Co-Chair
$9.6M
76,920 shares
-375%
27Weak
NETsell 310b5-1
Cloudflare, Inc.
Thomas J Seifert
CHIEF FINANCIAL OFFICER
$1.2M
10,000 shares
-3%
65Notable
NETsell 410b5-1
Cloudflare, Inc.
Matthew Prince
CEO & Board Co-Chair
$18M
157,152 shares
-300%
26Weak
NETsell 510b5-1
Cloudflare, Inc.
Douglas James Kramer
Chief Legal Officer
$420k
3,000 shares
-1%
65Notable
NETsell 610b5-1
Cloudflare, Inc.
Matthew Prince
CEO & Board Co-Chair
$23M
157,152 shares
-300%

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.

Thomas J Seifert sold $2.1M of NET | InsiderTell