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Who

Michael J. Katz

Director

Company insider

Files Form 4 as: Director, Mntn; Chief Bus. and Prod. Officer, T-Mobile US.

Every Form 4 they filed

In numbers

Trades disclosed
47
Buys
0
Sells
15
Bought
$0
Sold
$12.7M
Companies
2
Companies where not an officer
1
First trade
15 Feb 2022
Last trade
3 Sep 2026
Last filed
8 Sep 2026

Companies traded

Where they are an officer
TMUS T-Mobile USOfficer · Telecom Carriers · last 1 May 20260 buys · 15 sells
Everywhere else they filed: board seats, 10% stakes, other companies
MNTN MntnDirector · Advertising & Marketing · last 3 Sep 20260 buys · 0 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
3 Sep 2026filed 8 Sep 2026MNTN MntnAdvertising & MarketingSEC FORM 4 Code A—29,717 at $0.00filing
3 Sep 2026filed 8 Sep 2026MNTN MntnAdvertising & MarketingSEC FORM 4 Code A—29,717 at $0.00filing
1 May 2026filed 4 May 2026TMUS T-Mobile USTelecom CarriersSEC FORM 4 Sold$979K5,000 at $195.81filing
1 May 2026filed 4 May 2026TMUS T-Mobile USTelecom CarriersSEC FORM 4 Sold$979K5,000 at $195.81filing
15 Feb 2026filed 18 Feb 2026TMUS T-Mobile USTelecom CarriersSEC FORM 4 Code A—32,365 at $0.00filing
15 Feb 2026filed 18 Feb 2026TMUS T-Mobile USTelecom CarriersSEC FORM 4 Code F$1.6M7,141.633 at $219.50filing
15 Feb 2026filed 18 Feb 2026TMUS T-Mobile USTelecom CarriersSEC FORM 4 Code A—9,076 at $0.00filing
15 Feb 2026filed 18 Feb 2026TMUS T-Mobile USTelecom CarriersSEC FORM 4 Code F$784K3,571.407 at $219.50filing
15 Feb 2026filed 18 Feb 2026TMUS T-Mobile USTelecom CarriersSEC FORM 4 Code A—32,365 at $0.00filing
15 Feb 2026filed 18 Feb 2026TMUS T-Mobile USTelecom CarriersSEC FORM 4 Code F$1.6M7,141.63 at $219.50filing
15 Feb 2026filed 18 Feb 2026TMUS T-Mobile USTelecom CarriersSEC FORM 4 Code A—9,076 at $0.00filing
15 Feb 2026filed 18 Feb 2026TMUS T-Mobile USTelecom CarriersSEC FORM 4 Code F$784K3,571.41 at $219.50filing
17 Nov 2025filed 19 Nov 2025TMUS T-Mobile USTelecom CarriersSEC FORM 4 Sold$540K2,500 at $215.91filing
15 Aug 2025filed 19 Aug 2025TMUS T-Mobile USTelecom CarriersSEC FORM 4 Sold$628K2,500 at $251.12filing
15 May 2025filed 16 May 2025TMUS T-Mobile USTelecom CarriersSEC FORM 4 Sold$593K2,500 at $237.12filing
1 Apr 2025filed 3 Apr 2025TMUS T-Mobile USTelecom CarriersSEC FORM 4 Code A—22,880 at $0.00filing
18 Feb 2025filed 19 Feb 2025TMUS T-Mobile USTelecom CarriersSEC FORM 4 Sold$675K2,500 at $270.00filing
15 Feb 2025filed 19 Feb 2025TMUS T-Mobile USTelecom CarriersSEC FORM 4 Code A—18,801 at $0.00filing
15 Feb 2025filed 19 Feb 2025TMUS T-Mobile USTelecom CarriersSEC FORM 4 Code F$1.8M6,759.94 at $270.82filing
15 Feb 2025filed 19 Feb 2025TMUS T-Mobile USTelecom CarriersSEC FORM 4 Code A—19,117 at $0.00filing

Sectors

Communications15

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

Related people

Daniel James DrobacVP & Chief Accounting Officer · VP & Chief Accounting Officer at T-Mobile US, filing Form 4 there in the last year
Mark Wolfe NelsonChief Legal Officer & GC · Chief Legal Officer & GC at T-Mobile US, filing Form 4 there in the last year
Andre AlmeidaChief Commercial Officer · Chief Commercial Officer at T-Mobile US, filing Form 4 there in the last year
Christopher SambarChief Enterprise Officer · Chief Enterprise Officer at T-Mobile US, filing Form 4 there in the last year
Letitia A. LongDirector · Director at T-Mobile US, filing Form 4 there in the last year
Donald J. TrumpPresident · Also traded TMUS in the last 90 days