Insider · SEC Form 4 filer
John Malone
Companies
Where they file as an insider
Liberty Global (LBTY) 10% owner Latest filing Nov 9, 2026
Liberty Latin America (LILA) 10% owner Latest filing Nov 6, 2026
Liberty Live (LLYVK) 10% owner Latest filing Sep 24, 2026
Liberty Broadband (LBRDK) Director, 10% owner Latest filing Aug 19, 2026
Liberty Capital (GLIBK) Director, 10% owner Latest filing Aug 13, 2026
Atlanta Braves (BATRK) 10% owner Latest filing Feb 25, 2026
Liberty Media (FWONK) Chairman of the Board, Director, 10% owner Latest filing Dec 15, 2025
Warner Bros. Discovery (WBD) Director Latest filing Jun 5, 2024
And 1 more company with older filings.
Track record
Did their buys beat the typical stock?
Open-market buys27
Quarters checked 6 months later2
Beat the typical stock —
Quarters too new to check1
Too soon to tell. 2 quarters have finished so far. We show a record once 3 have.
Liberty Capital (GLIBK) Bought Aug 10–13, 2026 · $13.6M · 543,232 shares Too new Too new. Its 6-month check uses prices as of Mar 31, 2027.
GCI Liberty (GLIBK) Bought Mar 2, 2026 · $79.4K · 1,834 shares Behind typical Mar 31, 2026 $37.21 → Sep 30, 2026 $23.20 · −37.7% (typical stock +1.7%)
GCI Liberty (GLIBK) Bought Aug 18–Sep 26, 2025 · $9.98M · 279,618 shares Beat typical Sep 30, 2025 $37.27 → Mar 31, 2026 $37.21 · −0.2% (typical stock −3.4%)
Each row is one stock in one quarter, however many buys it took. We take the stock's price at the end of that quarter and again 6 months later, and compare it with the typical stock over the same dates. Prices are quarter-end values from funds' 13F reports (the middle value across 3 or more funds), through Sep 30, 2026. Moves past 3 times up or down, mostly stock splits, are left out. How we tested this.
Past results. This is data, not advice.
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