Thomas J. Seifert

Insider Reports History

Identity Names, identifiers, and filing context for this profile. 1 identity field
Reporting-owner location
San Francisco, CA
SEC source record Original filing metadata and source links for verification. 1 source field
Latest reporting-owner signature
/s/ Charlotte Bowe, by power of attorney
Source: Latest parsed Forms 3/4/5 signature
Source evidence Original filing metadata and source links for verification. 1 source field
Transaction source note
Rows are grouped by transaction date from the original SEC filing. Open the aggregated insider activity page to review issuer-level activity across dates.

Reported holdings for Thomas J. Seifert

Form 4 holding Chief Financial Officer

Cloudflare, Inc.

Security class
Class B Common Stock
Shares / value
46,100
Estimated value
$11,307,408
Report date
15 Jul 2026
Price
$245.28
Ownership
Indirect
Underlying class
Class A Common Stock
Underlying amount
46,100
Form 4 holding Chief Financial Officer

Cloudflare, Inc.

Security class
Class B Common Stock
Shares / value
8,925
Estimated value
$2,189,124
Report date
17 Jul 2026
Price
$245.28
Ownership
Direct
Underlying class
Class A Common Stock
Underlying amount
8,925
Form 4 holding Director

IPG PHOTONICS CORP

Security class
Common Stock
Shares / value
8,946
Estimated value
$987,191
Report date
24 May 2022
Price
$110.35
Ownership
Direct
Form 4 holding Director

WOLFSPEED, INC.

Security class
COMMON STOCK
Shares / value
20,476
Estimated value
$124,699
Report date
03 Feb 2025
Price
$6.09
Ownership
Direct
Form 4 holding Chief Financial Officer

Cloudflare, Inc.

Security class
Employee Stock Option (right to buy)
Shares / value
20,000
Estimated value
Report date
17 Jul 2026
Price
Ownership
Direct
Underlying class
Class B Common Stock
Underlying amount

Insider Reports Filed by Thomas J. Seifert

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