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Who

Ronald D. Fisher

Director

Company insider

Files Form 4 as: Director, Arm Holdings; Insider, T-Mobile US; Director, Sprint; Director and 10% owner, Gsi Commerce.

Every Form 4 they filed

In numbers

Trades disclosed
43
Buys
1
Sells
3
Bought
$36.0M
Sold
$135.9M
Companies
4
Companies where not an officer
4
First trade
18 Aug 2009
Last trade
15 May 2026
Last filed
19 May 2026

Companies traded

Everywhere else they filed: board seats, 10% stakes, other companies
ARM Arm HoldingsDirector · Semiconductors · last 15 May 20260 buys · 0 sells
TMUS T-Mobile USTelecom Carriers · last 26 Jun 20201 buy · 0 sells
SprintDirector · last 1 Apr 20200 buys · 1 sell
Gsi CommerceDirector, 10% owner · last 17 Jun 20110 buys · 2 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
15 May 2026filed 19 May 2026ARM Arm Holdingsoption or derivative · SemiconductorsSEC FORM 4 Code A—1,531 at $0.00filing
15 May 2026filed 19 May 2026ARM Arm Holdingsoption or derivative · SemiconductorsSEC FORM 4 Code A—1,531 at $0.00filing
26 Jun 2020filed 30 Jun 2020TMUS T-Mobile USTelecom CarriersSEC FORM 4 Bought$36.0M350,000 at $103.00filing
1 Apr 2020filed 2 Apr 2020SprintSEC FORM 4 Code D—2,161,388filing
1 Aug 2019filed 5 Aug 2019SprintSEC FORM 4 Code A—69,638 at $0.00filing
19 Nov 2018filed 19 Nov 2018SprintSEC FORM 4 Sold$2.0M327,525 at $6.20filing
15 Nov 2018filed 19 Nov 2018Sprintoption or derivativeSEC FORM 4 Code C—711,627filing
15 Nov 2018filed 19 Nov 2018SprintSEC FORM 4 Code C—711,627 at $0.00filing
7 Aug 2018filed 19 Nov 2018SprintSEC FORM 4 Code A—81,566 at $0.00filing
7 Aug 2018filed 9 Aug 2018SprintSEC FORM 4 Code A—81,566 at $0.00filing
15 Nov 2017filed 21 Dec 2017SprintSEC FORM 4 Code M—711,627 at $0.00filing
15 Nov 2017filed 21 Dec 2017SprintSEC FORM 4 Code J$2.1M336,896 at $6.16filing
15 Nov 2017filed 21 Dec 2017Sprintoption or derivativeSEC FORM 4 Code M—711,627filing
15 Nov 2017filed 17 Nov 2017SprintSEC FORM 4 Code M—711,627 at $0.00filing
15 Nov 2017filed 17 Nov 2017SprintSEC FORM 4 Code J$1.9M311,476 at $6.16filing
15 Nov 2017filed 17 Nov 2017Sprintoption or derivativeSEC FORM 4 Code M—711,627filing
3 Aug 2017filed 7 Aug 2017SprintSEC FORM 4 Code A—58,548 at $0.00filing
15 Nov 2016filed 17 Nov 2016SprintSEC FORM 4 Code M—711,627 at $0.00filing
15 Nov 2016filed 17 Nov 2016SprintSEC FORM 4 Code J$2.4M315,958 at $7.74filing
15 Nov 2016filed 17 Nov 2016Sprintoption or derivativeSEC FORM 4 Code M—711,627filing

Sectors

Communications1
Not placed3

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

Related people

Jason ChildChief Financial Officer · Chief Financial Officer at Arm Holdings PLC /uk, filing Form 4 there in the last year
William AbbeyDirector · Chief Commercial Officer at Arm Holdings PLC /uk, filing Form 4 there in the last year
Rene A. HaasChief Executive Officer · Chief Executive Officer at Arm Holdings PLC /uk, filing Form 4 there in the last year
Laura Kathleen BartelsChief Accounting Officer · Chief Accounting Officer at Arm Holdings PLC /uk, filing Form 4 there in the last year
Jeffrey SineDirector · Director at Arm Holdings PLC /uk, filing Form 4 there in the last year
Daniel James DrobacVP & Chief Accounting Officer · Also traded TMUS in the last 90 days
Donald J. TrumpPresident · Also traded TMUS in the last 90 days