Thomas J Seifert Insider Trading Activity

Corporate InsiderCFO · CIK 1473289

103

Total trades

$60.5M

Total volume

May 18, 2026

Last activity

NET

Cloudflare, Inc.

Thomas J Seifert has been net-selling over the last 12 months with 0 purchases and 89 sales across 1 company.

NET is the most-traded position with 89 trades. The largest single transaction was a sale of NET for $7.3M on Jul 28, 2025.

Performance Scorecard

Forward stock performance after each transaction by Thomas J Seifert. Buy returns measure price movement after open-market purchases; sell-avoided measures the loss avoided after open-market sales. Success rate counts trades where the insider's direction was right.

PERIOD	AVG BUY RETURN	AVG SELL AVOIDED	SUCCESS RATE	TRADES
30 days	—	-5.5%	31%	103
90 days	—	-8.7%	24%	95
120 days	—	-7.9%	30%	88

Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.

Price & Trades

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NET · Cloudflare, Inc.

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Recent Trades

Showing the 50 most recent of 103 disclosed trades.

DATE	TICKER	TYPE	SHARES	PRICE	VALUE	Δ OWNED	ROLE
May 18, 2026	NET	Sell	2,000	$202.17	$404K	−0.9%	CFO
May 18, 2026	NET	Sell	270	$203.02	$55K	−0.1%	CFO
May 18, 2026	NET	Sell	3,570	$201.21	$718K	−1.6%	CFO
May 18, 2026	NET	Sell	400	$197.81	$79K	−0.2%	CFO
May 18, 2026	NET	Sell	100	$193.28	$19K	−0.0%	CFO
May 18, 2026	NET	Sell	2,432	$200.20	$487K	−1.1%	CFO
May 18, 2026	NET	Sell	928	$199.05	$185K	−0.4%	CFO
May 18, 2026	NET	Sell	300	$195.14	$59K	−0.1%	CFO
Apr 17, 2026	NET	Sell	1,475	$199.48	$294K	−0.7%	CFO
Apr 17, 2026	NET	Sell	2,725	$200.51	$546K	−1.2%	CFO
Apr 17, 2026	NET	Sell	2,076	$195.09	$405K	−0.9%	CFO
Apr 17, 2026	NET	Sell	1,000	$196.97	$197K	−0.4%	CFO
Apr 17, 2026	NET	Sell	1,724	$196.04	$338K	−0.8%	CFO
Apr 17, 2026	NET	Sell	400	$200.95	$80K	−0.2%	CFO
Apr 17, 2026	NET	Sell	600	$198.03	$119K	−0.3%	CFO
Mar 17, 2026	NET	Sell	100	$208.64	$21K	−0.0%	CFO
Mar 17, 2026	NET	Sell	200	$207.68	$42K	−0.1%	CFO
Mar 17, 2026	NET	Sell	2,000	$213.23	$426K	−0.9%	CFO
Mar 17, 2026	NET	Sell	3,041	$211.69	$644K	−1.3%	CFO
Mar 17, 2026	NET	Sell	5,000	$212.57	$1.1M	−2.2%	CFO
Feb 20, 2026	NET	Sell	200	$187.38	$37K	−0.2%	CFO
Feb 20, 2026	NET	Sell	500	$186.10	$93K	−0.5%	CFO
Feb 20, 2026	NET	Sell	700	$185.09	$130K	−0.7%	CFO
Feb 20, 2026	NET	Sell	1,000	$183.78	$184K	−0.9%	CFO
Feb 20, 2026	NET	Sell	1,300	$182.53	$237K	−1.2%	CFO
Feb 20, 2026	NET	Sell	1,900	$180.68	$343K	−1.7%	CFO
Feb 20, 2026	NET	Sell	1,500	$181.82	$273K	−1.4%	CFO
Feb 20, 2026	NET	Sell	395	$194.05	$77K	−0.5%	CFO
Feb 20, 2026	NET	Sell	2,400	$179.51	$431K	−2.1%	CFO
Feb 20, 2026	NET	Sell	300	$188.77	$57K	−0.3%	CFO
Feb 20, 2026	NET	Sell	2,613	$190.35	$497K	−2.5%	CFO
Feb 20, 2026	NET	Sell	100	$195.19	$20K	−0.1%	CFO
Feb 20, 2026	NET	Sell	4,700	$178.53	$839K	−4.0%	CFO
Feb 20, 2026	NET	Sell	2,766	$193.12	$534K	−3.1%	CFO
Feb 20, 2026	NET	Sell	4,771	$192.18	$917K	−5.1%	CFO
Feb 20, 2026	NET	Sell	8,133	$191.13	$1.6M	−8.0%	CFO
Feb 20, 2026	NET	Sell	8,279	$177.18	$1.5M	−6.5%	CFO
Jan 20, 2026	NET	Sell	1,800	$178.08	$321K	−1.3%	CFO
Jan 20, 2026	NET	Sell	3,472	$177.17	$615K	−2.4%	CFO
Jan 20, 2026	NET	Sell	100	$181.98	$18K	−0.1%	CFO
Jan 20, 2026	NET	Sell	928	$176.27	$164K	−0.6%	CFO
Jan 20, 2026	NET	Sell	600	$181.27	$109K	−0.4%	CFO
Jan 20, 2026	NET	Sell	1,900	$180.09	$342K	−1.4%	CFO
Jan 20, 2026	NET	Sell	1,200	$179.41	$215K	−0.8%	CFO
Dec 22, 2025	NET	Sell	483	$203.35	$98K	−0.4%	CFO
Dec 22, 2025	NET	Sell	3,328	$202.37	$673K	−2.4%	CFO
Dec 22, 2025	NET	Sell	353	$198.64	$70K	−0.2%	CFO
Dec 22, 2025	NET	Sell	4,836	$201.52	$975K	−3.3%	CFO
Dec 22, 2025	NET	Sell	1,000	$200.58	$201K	−0.7%	CFO
Nov 20, 2025	NET	Sell	2,272	$190.31	$432K	−1.3%	CFO