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Who

Thomas Kempster

Director

Company insider

Files Form 4 as: EVP, Data Storage.

Every Form 4 they filed

In numbers

Trades disclosed
44
Buys
0
Sells
7
Bought
$0
Sold
$78K
Companies
1
Companies where not an officer
0
First trade
14 Dec 2017
Last trade
11 Sep 2026
Last filed
14 Sep 2026

Companies traded

Where they are an officer
DTST Data StorageDirector, Officer, 10% owner · Payments & Processors · last 11 Sep 20260 buys · 7 sells

Activity over time

1 Nov 2024 – 1 Oct 2026
10Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
11 Sep 2026filed 14 Sep 2026DTST Data StoragePayments & ProcessorsSEC FORM 4 Sold$10K3,500 at $2.93filing
11 Sep 2026filed 14 Sep 2026DTST Data StoragePayments & ProcessorsSEC FORM 4 Sold$10K3,500 at $2.93filing
2 Sep 2026filed 4 Sep 2026DTST Data StoragePayments & ProcessorsSEC FORM 4 Code M—10,000 at $0.00filing
2 Sep 2026filed 4 Sep 2026DTST Data StoragePayments & ProcessorsSEC FORM 4 Code A—12,000 at $0.00filing
2 Sep 2026filed 4 Sep 2026DTST Data Storageoption or derivative · Payments & ProcessorsSEC FORM 4 Code M—10,000 at $0.00filing
2 Sep 2026filed 4 Sep 2026DTST Data Storageoption or derivative · Payments & ProcessorsSEC FORM 4 Code M—10,000 at $0.00filing
2 Sep 2026filed 4 Sep 2026DTST Data StoragePayments & ProcessorsSEC FORM 4 Code M—10,000 at $0.00filing
2 Sep 2026filed 4 Sep 2026DTST Data StoragePayments & ProcessorsSEC FORM 4 Code A—12,000 at $0.00filing
29 Jan 2026filed 2 Feb 2026DTST Data Storageoption or derivative · Payments & ProcessorsSEC FORM 4 Code A—10,000 at $0.00filing
29 Jan 2026filed 2 Feb 2026DTST Data Storageoption or derivative · Payments & ProcessorsSEC FORM 4 Code A—10,000 at $0.00filing
14 Jan 2026filed 16 Jan 2026DTST Data StoragePayments & ProcessorsSEC FORM 4 Code D$4.6M881,472 at $5.20filing
14 Jan 2026filed 16 Jan 2026DTST Data StoragePayments & ProcessorsSEC FORM 4 Code D$4.6M881,472 at $5.20filing
10 Dec 2025filed 12 Dec 2025DTST Data StoragePayments & ProcessorsSEC FORM 4 Sold$34K6,846 at $4.99filing
11 Sep 2025filed 15 Sep 2025DTST Data Storageoption or derivative · Payments & ProcessorsSEC FORM 4 Code M—4,902 at $0.00filing
11 Sep 2025filed 15 Sep 2025DTST Data Storageoption or derivative · Payments & ProcessorsSEC FORM 4 Code M—8,334 at $0.00filing
11 Sep 2025filed 15 Sep 2025DTST Data StoragePayments & ProcessorsSEC FORM 4 Code M—4,902filing
11 Sep 2025filed 15 Sep 2025DTST Data StoragePayments & ProcessorsSEC FORM 4 Code M—8,334filing
4 Aug 2025filed 5 Aug 2025DTST Data Storageoption or derivative · Payments & ProcessorsSEC FORM 4 Code M—16,666 at $0.00filing
4 Aug 2025filed 5 Aug 2025DTST Data Storageoption or derivative · Payments & ProcessorsSEC FORM 4 Code M—9,804 at $0.00filing
4 Aug 2025filed 5 Aug 2025DTST Data StoragePayments & ProcessorsSEC FORM 4 Code M$33K16,666 at $2.00filing

Sectors

Financials7

Buys in green, sells in red, by the company’s sector.

Related people

John ArgenDirector · Director at Data Storage, filing Form 4 there in the last year
Uwayne A. MitchellDirector · Director at Data Storage, filing Form 4 there in the last year
Clifford SteinDirector · Director at Data Storage, filing Form 4 there in the last year
Harold J. SchwartzDirector · Director at Data Storage, filing Form 4 there in the last year
Matthew GroverDirector · Director at Data Storage, filing Form 4 there in the last year