Career & Filing History
Every role John C. Malone has reported on a Form 4, reconstructed from the filings themselves. Reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
John C. Malone serves as Director of Liberty Capital Corp (GLIBK). Malone has also held reporting roles at Liberty Broadband Corp (LBRDK) and Liberty Latin America Ltd. (LILA). Malone has reported 33 insider filings with the SEC since 2024. The most recent filing was in August 2026.
Every role John C. Malone has reported on a Form 4, reconstructed from the filings themselves. Reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
Liberty Capital Corp/NV (GLIBK)5 filingsLiberty Broadband Corp (LBRDK)1 filingLiberty Latin America Ltd. (LILA)5 filingsUpdated Aug 31, 2026
John C. Malone is Director, 10% Owner of Liberty Capital Corp/NV (GLIBK). 34 SEC Form 4 filings on record going back to 2024, most recently on 28 August 2026. Most recent open-market trade: bought $57K of LILA on 18 August 2026. Lifetime open-market purchases: $172.61M. Lifetime open-market sales: $108.98M. Historical track record: 4/5 stars across 36 tracked purchases.
Every recent SEC Form 4 transaction John C. Malone has reported, most recent first.
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realized performance after each tracked open-market purchase.
| Metric | Value |
|---|---|
| InsiderAlpha rating | ★★★★☆ (4/5) |
| Total purchases tracked | 36 |
| Purchases with forward-return data | 36 |
| 30-day win rate | 64% |
| 90-day win rate | 50% |
| Avg 5-day return | +1.06% |
| Avg 30-day return | -0.30% |
| Avg 90-day return | -0.21% |
| Best 30-day return |
InsiderAlpha's records for John C. Malone go back to 2024: 34 primary Form 4 filings, an average of 11.3 per year. The typical open-market purchase is $2.98M (58 buys totaling $172.61M). The largest single buy on record is $106.54M of LILA in 2026. Sales side: 4 recorded sales totaling $108.98M, so the filing history runs buy-heavy by dollar value. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Insiders who reported open-market trades in the last 12 months at the companies John C. Malone files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
John C. Malone is a corporate insider, tracked as Director, 10% Owner of Liberty Capital Corp/NV (GLIBK). InsiderAlpha holds 34 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
11 primary Form 4 filings in the last 90 days, covering 3 companies.
Recorded transactions: 58 open-market purchases ($172.61M) and 4 open-market sales ($108.98M) across all tracked filings.
Across 36 tracked purchases, John C. Malone averaged -0.3% avg 30-day return with a 64% 30-day win rate. InsiderAlpha rates the track record at 4/5 stars.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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$LBRDK Liberty Broadband Corp57.6K shares @ --
| +11.63% |