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Who

Thomas Caulfield

Director

Company insider

Files Form 4 as: Director, USA Rare Earth; Director, Sandisk; Director, GlobalFoundries; Director, Western Digital; Director, PDF Solutions; EVP/Sales, Mkt, & Cust Serv, Novellus Systems.

Every Form 4 they filed

In numbers

Trades disclosed
89
Buys
0
Sells
4
Bought
$0
Sold
$1.8M
Companies
6
Companies where not an officer
5
First trade
15 Sep 2006
Last trade
1 Oct 2026
Last filed
5 Oct 2026

Companies traded

Where they are an officer
Novellus SystemsOfficer · last 2 Jun 20090 buys · 4 sells
Everywhere else they filed: board seats, 10% stakes, other companies
USAR USA Rare EarthDirector · Rare Earths & Critical Minerals · last 1 Oct 20260 buys · 0 sells
SNDK SandiskDirector · Hardware, Devices & Storage · last 12 May 20260 buys · 0 sells
GFS GlobalFoundriesDirector · Semiconductors · last 1 May 20260 buys · 0 sells
WDC Western DigitalDirector · Hardware, Devices & Storage · last 20 Nov 20240 buys · 0 sells
PDFS PDF SolutionsDirector · Software · last 11 Sep 20130 buys · 0 sells

Activity over time

1 Nov 2024 – 1 Oct 2026
101Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
1 Oct 2026filed 5 Oct 2026USAR USA Rare EarthRare Earths & Critical MineralsSEC FORM 4 Code A—1,482 at $0.00filing
7 Jul 2026filed 7 Jul 2026USAR USA Rare EarthRare Earths & Critical MineralsSEC FORM 4 Code A—271 at $0.00filing
7 Jul 2026filed 7 Jul 2026USAR USA Rare EarthRare Earths & Critical MineralsSEC FORM 4 Code A—271 at $0.00filing
3 Jun 2026filed 4 Jun 2026USAR USA Rare EarthRare Earths & Critical MineralsSEC FORM 4 Code A—407 at $0.00filing
3 Jun 2026filed 4 Jun 2026USAR USA Rare EarthRare Earths & Critical MineralsSEC FORM 4 Code M—2,548 at $0.00filing
3 Jun 2026filed 4 Jun 2026USAR USA Rare Earthoption or derivative · Rare Earths & Critical MineralsSEC FORM 4 Code M—2,548 at $0.00filing
3 Jun 2026filed 4 Jun 2026USAR USA Rare Earthoption or derivative · Rare Earths & Critical MineralsSEC FORM 4 Code M—2,548 at $0.00filing
3 Jun 2026filed 4 Jun 2026USAR USA Rare Earthoption or derivative · Rare Earths & Critical MineralsSEC FORM 4 Code A—6,438 at $0.00filing
3 Jun 2026filed 4 Jun 2026USAR USA Rare Earthoption or derivative · Rare Earths & Critical MineralsSEC FORM 4 Code A—6,438 at $0.00filing
3 Jun 2026filed 4 Jun 2026USAR USA Rare EarthRare Earths & Critical MineralsSEC FORM 4 Code A—407 at $0.00filing
3 Jun 2026filed 4 Jun 2026USAR USA Rare EarthRare Earths & Critical MineralsSEC FORM 4 Code M—2,548 at $0.00filing
12 May 2026filed 14 May 2026SNDK SandiskHardware, Devices & StorageSEC FORM 4 Code G—9,666 at $0.00filing
12 May 2026filed 14 May 2026SNDK SandiskHardware, Devices & StorageSEC FORM 4 Code G—9,666 at $0.00filing
1 May 2026filed 5 May 2026GFS GlobalFoundriesSemiconductorsSEC FORM 4 Code A—146,199 at $0.00filing
1 May 2026filed 5 May 2026GFS GlobalFoundriesSemiconductorsSEC FORM 4 Code A—146,199 at $0.00filing
19 Mar 2026filed 23 Mar 2026USAR USA Rare Earthoption or derivative · Rare Earths & Critical MineralsSEC FORM 4 Code A—2,548 at $0.00filing
19 Mar 2026filed 23 Mar 2026USAR USA Rare Earthoption or derivative · Rare Earths & Critical MineralsSEC FORM 4 Code A—2,548 at $0.00filing
3 Mar 2026filed 5 Mar 2026SNDK SandiskHardware, Devices & StorageSEC FORM 4 Code G—14,500 at $0.00filing
3 Mar 2026filed 5 Mar 2026SNDK SandiskHardware, Devices & StorageSEC FORM 4 Code G—14,500 at $0.00filing
3 Mar 2026filed 5 Mar 2026SNDK SandiskHardware, Devices & StorageSEC FORM 4 Code G—14,500 at $0.00filing

News

No headline names them, or the companies they trade most, lately.

Sectors

Not placed4

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

Related people

Nobody else traded the same names lately.