Reporting owner · CIK 0001473289

Seifert Thomas J

Visual SEC Form 4 history across 2 companies, 63 transactions and 9 filings.

CFOChief Financial OfficerCloudflare, Inc.
Open-market mix
Latest filingAug 19, 2026, 09:35 PM
Filings9Form 4 records
Buying$00 purchases
Selling$20.4M31 sales
Net value−$20.4MBuys minus sells
Companies24 securities
Most recentAug 17, 2026unknown

Open-market buy performance

90-day forward return on this insider's open-market purchases

90d forward
Forward return is not available yet

We compute this from each buy's stock performance 90 days after the transaction. The price history is still being populated for this insider's their open-market buys, so the average and median will appear here once the daily price refresh has covered the relevant trading days.

Monthly open-market activity

Reported purchase and sale transaction counts

Buys Sells
1580-8-152Jan 248Jan 2514Feb 257Aug 26

Net value flow

Buys minus sells

Jan 24
−$1.2M
Jan 25
−$9.5M
Feb 25
−$6.7M
Aug 26
−$3.1M

Transaction texture

Ownership and ticket size

Average P/S size$658.2K
Median P/S size$444.1K
Direct63
Indirect0
Aug 17, 2026unknown

Filing-only signals

Deterministic matches in this insider's history

Cluster Sellingpattern24Derivative Transactionfiling-context21Direct Ownershipfiling-context63Large Holdings Increaseholdings7Large Holdings Reductionholdings8Large Salesize9Repeat Sellerpattern2810b5-1 Detectedfiling-context60

Latest Form 4 facts

Quick context from source filings

Latest transaction

sale at Cloudflare, Inc. on Aug 17, 2026 valued at $31,461.

Review SEC filing
Latest buy

No open-market insider purchase is available.

Associated companies

Visual map of known reporting history

NETCloudflare, Inc.62 transactions · latest Aug 19, 2026, 09:35 PMWOLFWOLFSPEED, INC.1 transactions · latest Feb 03, 2025, 09:16 PM
TickerInsiderRoleTypeSharesValueCodeSignals90d returnFiledTrans date
NETSEIFERT THOMAS J
CFO
C10b5-115.0k$0C
Derivative Transaction Direct Ownership Large Holdings Reduction+1
—01/06/202501/03/2025
NETSEIFERT THOMAS J
CFO
exercise10b5-115.0k$0M
Derivative Transaction Direct Ownership Large Holdings Increase+1
—01/06/202501/03/2025
NETSEIFERT THOMAS J
CFO
exercise10b5-115.0k$0M
Derivative Transaction Direct Ownership 10b5-1 Detected
—01/06/202501/03/2025
NETSEIFERT THOMAS J
CFO
sale10b5-13.87k-$44.4MS
Cluster Selling Direct Ownership Repeat Seller+1
—01/06/202501/03/2025
NETSEIFERT THOMAS J
CFO
sale10b5-18.36k-$95.1MS
Cluster Selling Direct Ownership Large Sale+2
—01/06/202501/03/2025
NETSEIFERT THOMAS J
CFO
sale10b5-12.75k-$31.1MS
Cluster Selling Direct Ownership 10b5-1 Detected
—01/06/202501/03/2025
NETSEIFERT THOMAS J
CFO
C10b5-115.0k—C
Direct Ownership 10b5-1 Detected
—01/06/202501/03/2025
NETSEIFERT THOMAS J
CFO
unknown10b5-115.0k$0C
Derivative Transaction Direct Ownership Large Holdings Reduction+1
—01/03/202401/03/2024
NETSEIFERT THOMAS J
CFO
exercise10b5-115.0k$0M
Derivative Transaction Direct Ownership Large Holdings Increase+1
—01/03/202401/03/2024
NETSEIFERT THOMAS J
CFO
exercise10b5-115.0k$0M
Derivative Transaction Direct Ownership 10b5-1 Detected
—01/03/202401/03/2024

Seifert Thomas J Insider Activity FAQ

SEC Form 4 context

Who is Seifert Thomas J?

Seifert Thomas J is a reporting owner in SEC Form 4 filings with reporting owner CIK 0001473289.

Which companies has Seifert Thomas J reported transactions for?

Cloudflare, Inc., WOLFSPEED, INC.

When was Seifert Thomas J's latest insider buy?

No open-market insider purchase is available for this period.

When was Seifert Thomas J's latest insider sale?

sale at Cloudflare, Inc. on Aug 17, 2026 valued at $31,461.

Where can I see the original SEC filings?

Each transaction row links directly to the source SEC filing so the reported Form 4 details can be reviewed.

Are performance metrics included?

This version does not calculate win rates, forward returns, benchmark-adjusted returns, or high-conviction scores.

Seifert Thomas J Insider Transactions & Form 4 Filings | The Insiders Post