Michael J. Katz

Companies

• MNTN, Inc.Board member Sep 8, 2026 to now¹
• T-Mobile USEVP, T-Mobile for Business Jun 14, 2021 to now²
• T-Mobile USPresident Feb 17, 2022 to Feb 20, 2024³

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• T-Mobile US TMUS181,930 shares⁴$28.9M at $159.01May 1, 2026
• MMNTN, Inc. MNTN29,717 shares⁵$311.7K at $10.49Sep 3, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Sep 3, 2026Granted 29,717 shares of MNTN, Inc.⁵
• May 1, 2026Sold 5,000 shares at $195.81 of T-Mobile US⁴
• Feb 15, 2026Shares withheld for tax 3,571 shares at $219.50 of T-Mobile US⁶
• Feb 15, 2026Granted 9,076 shares of T-Mobile US⁶
• Feb 15, 2026Shares withheld for tax 7,142 shares at $219.50 of T-Mobile US⁶
• Feb 15, 2026Granted 32,365 shares of T-Mobile US⁶
• Nov 17, 2025Sold 2,500 shares at $215.91 of T-Mobile US⁷
• Aug 15, 2025Sold 2,500 shares at $251.12 of T-Mobile US⁸
• May 15, 2025Sold 2,500 shares at $237.12 of T-Mobile US⁹
• Apr 1, 2025Granted 22,880 shares of T-Mobile US¹⁰
• Feb 18, 2025Sold 2,500 shares at $270.00 of T-Mobile US¹¹
• Feb 15, 2025Shares withheld for tax 7,523 shares at $270.82 of T-Mobile US¹¹
• Feb 15, 2025Granted 19,117 shares of T-Mobile US¹¹
• Feb 15, 2025Shares withheld for tax 6,760 shares at $270.82 of T-Mobile US¹¹
• Feb 15, 2025Granted 18,801 shares of T-Mobile US¹¹
• Oct 1, 2024Sold 3,000 shares at $205.30 of T-Mobile US¹²
• Jul 1, 2024Sold 3,000 shares at $177.59 of T-Mobile US¹³
• Apr 1, 2024Sold 3,000 shares at $163.22 of T-Mobile US¹⁴
• Mar 5, 2024Sold 2,288 shares at $163.99 of T-Mobile US¹⁵
• Mar 4, 2024Shares withheld for tax 3,793 shares at $163.34 of T-Mobile US¹⁵
• Mar 4, 2024Granted 9,637 shares of T-Mobile US¹⁵
• Mar 4, 2024Shares withheld for tax 1,485 shares at $163.34 of T-Mobile US¹⁵
• Feb 16, 2024Sold 6,655 shares at $161.23 of T-Mobile US¹⁶
• Feb 15, 2024Shares withheld for tax 4,320 shares at $161.57 of T-Mobile US¹⁶
• Feb 15, 2024Granted 18,614 shares of T-Mobile US¹⁶