Seifert Thomas J

Insider·Cloudflare, Inc.·NET·Insider since 2025·Form 4 filings: 87
Trades YTD
7
Trades (12m)
54
Net position
Current holdings
P-code buys (12m)
0
Cluster
None

Transaction history · last 12 months

50 transactions
20 Jan 2026
SOLD
$NET
100
$181.98
S
20 Jan 2026
SOLD
$NET
600
$181.27
S
20 Jan 2026
SOLD
$NET
1,900
$180.09
S
20 Jan 2026
SOLD
$NET
1,200
$179.41
S
20 Jan 2026
SOLD
$NET
1,800
$178.08
S
20 Jan 2026
SOLD
$NET
3,472
$177.17
S
20 Jan 2026
SOLD
$NET
928
$176.27
S
22 Dec 2025
SOLD
$NET
483
$203.35
S
22 Dec 2025
SOLD
$NET
3,328
$202.37
S
22 Dec 2025
SOLD
$NET
4,836
$201.52
S
22 Dec 2025
SOLD
$NET
1,000
$200.58
S
22 Dec 2025
SOLD
$NET
353
$198.64
S
20 Oct 2025
SOLD
$NET
300
$213.40
S
20 Oct 2025
SOLD
$NET
3,846
$212.75
S
20 Oct 2025
SOLD
$NET
2,754
$211.71
S
20 Oct 2025
SOLD
$NET
2,600
$210.78
S
20 Oct 2025
SOLD
$NET
500
$209.62
S
22 Sep 2025
SOLD
$NET
400
$229.93
S
22 Sep 2025
SOLD
$NET
2,778
$229.33
S
22 Sep 2025
SOLD
$NET
3,022
$228.29
S
22 Sep 2025
SOLD
$NET
1,800
$227.15
S
22 Sep 2025
SOLD
$NET
400
$226.22
S
22 Sep 2025
SOLD
$NET
600
$224.47
S
22 Sep 2025
SOLD
$NET
1,000
$223.49
S
20 Aug 2025
SOLD
$NET
900
$194.74
S
20 Aug 2025
SOLD
$NET
543
$193.64
S
20 Aug 2025
SOLD
$NET
10,711
$192.71
S
20 Aug 2025
SOLD
$NET
4,017
$191.53
S
20 Aug 2025
SOLD
$NET
12,762
$190.59
S
20 Aug 2025
SOLD
$NET
4,073
$189.60
S
20 Aug 2025
SOLD
$NET
3,549
$188.67
S
20 Aug 2025
SOLD
$NET
2,300
$187.84
S
20 Aug 2025
SOLD
$NET
1,100
$186.56
S
20 Aug 2025
SOLD
$NET
1,600
$185.34
S
28 Jul 2025
SOLD
$NET
6,362
$200.15
S
28 Jul 2025
SOLD
$NET
5,600
$200.12
S
28 Jul 2025
SOLD
$NET
6,257
$200.09
S
28 Jul 2025
SOLD
$NET
4,672
$201.20
S
28 Jul 2025
SOLD
$NET
36,239
$200.28
S
25 Jul 2025
SOLD
$NET
400
$200.00
S
21 Jul 2025
SOLD
$NET
8,238
$200.18
S
21 Jul 2025
SOLD
$NET
9,000
$200.16
S
21 Jul 2025
SOLD
$NET
8,343
$200.18
S
21 Jul 2025
SOLD
$NET
8,689
$200.18
S
21 Jul 2025
SOLD
$NET
200
$200.16
S
21 Jul 2025
SOLD
$NET
3,300
$198.72
S
21 Jul 2025
SOLD
$NET
6,000
$197.87
S
21 Jul 2025
SOLD
$NET
500
$196.53
S
20 Jun 2025
SOLD
$NET
100
$184.44
S
20 Jun 2025
SOLD
$NET
600
$183.63
S

Transaction codes: P open-market purchase · S sale · M option exercise · A grant.

Cluster context · Cloudflare, Inc.

last 30 days

No active insider cluster at Cloudflare, Inc. in the last 30 days. J's recent transactions appear in the section above.

Convergence · Pattern Engine ships in v1.1

30-day window
In development

Convergence participation lands with the Pattern Engine.

Once the Pattern Engine ships, this section will list every active convergence event J is named in — the hedge funds and Congress members on the same name, the 30-day window, and the combined position size.

Context

Form 4 background

Form 4 filings are required within two business days of any insider transaction by an officer, director, or 10%+ shareholder. Open-market purchases (transaction code P) are the most signal-rich because they indicate the insider is paying market price with personal cash — as distinct from option exercises, scheduled sales, or compensation grants. Cluster buying — three or more insiders of the same company buying open-market shares in a 30-day window — has historically been one of the strongest positive insider-trading signals in the academic literature.

Source data: SEC EDGAR · Form 4 filings · Last refreshed 10:43 UTC.