GREGORY B MAFFEI
CIK 1099636 · President/CEO · last filed 2026-08-28
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
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Disclosed Exposure
$371.87M
Companies
39
Total Filings
460
Lifetime Open-Market Net
-$420.48M
Filer Profile
Reported Address
12300 LIBERTY BLVDENGLEWOOD, CO 80112
Related Filers
Qurate Retail, Inc. — 81 joint filings, latest 2026-08-06
Liberty Media Corp — 73 joint filings, latest 2024-12-18
SIRIUS XM HOLDINGS INC. — 67 joint filings, latest 2026-08-28
Liberty Broadband Corp — 36 joint filings, latest 2024-12-19
Liberty TripAdvisor Holdings, Inc. — 32 joint filings, latest 2025-04-30
GCI LIBERTY, INC. — 18 joint filings, latest 2020-12-22
Starz — 17 joint filings, latest 2016-12-12
CHARTER COMMUNICATIONS, INC. /MO/ — 12 joint filings, latest 2024-04-25
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses.
View filings on SEC EDGAR.
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| SIRI | Director | 5,385,099 | $25.86 | $139.23M | -$474.3K | 65 | 2026-08-28 |
| ZG | Director | 637,783 | $29.30 | $18.69M | -$2.78M | 21 | 2026-03-03 |
| TRIP | Director | 155,078 | $8.41 | $1.30M | $1.12M | 15 | 2025-06-20 |
| QVC Group, Inc. (QRTEP) Delisted | Chairman of the Board | 8,125,782 | $39.91 | $324.30M | -$3.6K | 13 | 2025-03-07 |
| CHARTER COMMUNICATIONS, INC. /MO/ (LBRDP) Delisted | President/CEO | 1,565,299 | $22.13 | $34.64M | -$28.45M | 11 | 2024-12-19 |
| CHARTER COMMUNICATIONS, INC. /MO/ (LBRDK) Delisted | President/CEO | 1,398,523 | $36.02 | $50.37M | -$110.52M | 30 | 2024-12-19 |
| FWONK | President, CEO | 1,372,395 | $94.61 | $129.84M | -$106.77M | 41 | 2024-12-18 |
| BATRK | President, CEO | 1,158,836 | $54.26 | $62.88M | $0 | 1 | 2024-08-30 |
| Liberty Media Corp (LSXMK) Delisted | President, CEO | 4,733,709 | $22.29 | $105.51M | -$101.40M | 52 | 2024-08-26 |
| LYV | Director | 111,602 | $170.87 | $19.07M | $0 | 15 | 2024-06-14 |
| CHTR | Director | 7,569 | $112.91 | $854.6K | -$2.1K | 10 | 2024-04-25 |
| Liberty TripAdvisor Holdings, Inc. (LTRPB) Delisted | President/CEO | 3,593,255 | $10.50 | $37.73M | $315.9K | 14 | 2023-06-02 |
| GLIBA | President and CEO | 0 | $23.65 | $0 | $0 | 1 | 2020-12-22 |
| GRIZZLY MERGER SUB 1, LLC (GLIBP) Delisted | President and CEO | 935,188 | — | — | -$6.30M | 9 | 2020-12-14 |
| Liberty Media Corp (LSXMR) Delisted | President, CEO | 3,124,096 | — | — | $0 | 1 | 2020-06-04 |
| QVC Group, Inc. (QRTEB) Delisted | Chairman of the Board | 704,696 | $2.00 | $1.41M | $1.89M | 9 | 2020-04-17 |
| P | Director | 0 | $126.00 | $0 | $0 | 3 | 2019-02-01 |
| Liberty Expedia Holdings, Inc. (LEXEB) Delisted | 10%+ Owner | 425,876 | — | — | $0 | 1 | 2018-12-21 |
| QVC Group, Inc. (QVCB) Delisted | President, CEO | 416,464 | — | — | -$8.24M | 17 | 2018-03-07 |
| Starz Acquisition LLC (STRZB) Delisted | Director | 1,368,204 | — | — | $0 | 1 | 2016-12-02 |
| Liberty Media Corp (LSXM.B) Delisted | President, CEO | 696,333 | — | — | $0 | 4 | 2016-07-11 |
| Liberty Media Corp (LSXM.K) Delisted | President, CEO | 913,739 | — | — | $0 | 1 | 2016-04-22 |
| Liberty Media Corp (LMCK) Delisted | President, CEO | 3,676,901 | — | — | -$2.44M | 7 | 2016-03-31 |
| CHARTER COMMUNICATIONS, INC. /MO/ (LBRD.K) Delisted | President/CEO | 388,256 | — | — | $0 | 3 | 2016-01-04 |
| Starz Acquisition LLC (STRZA) Delisted | Director | 1,822,456 | — | — | -$6.68M | 6 | 2015-12-17 |
| Z | Director | 0 | $28.43 | $0 | -$1.20M | 12 | 2015-03-04 |
| CHARTER COMMUNICATIONS, INC. /MO/ (LBRK.R) Delisted | President/CEO | 437,529 | — | — | $0 | 3 | 2015-01-02 |
| Liberty TripAdvisor Holdings, Inc. (LTRP.B) Delisted | President/CEO | 3,002,051 | — | — | $50.36M | 1 | 2014-12-23 |
| QVC Group, Inc. (LVNTA) Delisted | President, CEO | 3,874,887 | — | — | -$29.50M | 9 | 2014-03-26 |
| Liberty Media Corp (LMCB) Delisted | President, CEO | 5,250,831 | — | — | $0 | 2 | 2014-03-26 |
| BARNES & NOBLE INC (BKS) Delisted | Director | 25,518 | — | — | $0 | 3 | 2013-09-12 |
| Starz Acquisition LLC (STRZ.B) Delisted | Chairman of the Board | 1,732,954 | — | — | $0 | 1 | 2013-03-06 |
| Starz Acquisition LLC (LMCA) Delisted | President, CEO | 1,736,402 | — | — | -$39.20M | 6 | 2013-01-02 |
| ELECTRONIC ARTS INC. (EA) Delisted | Director | 16,197 | $209.70 | $3.40M | $0 | 3 | 2012-07-27 |
| ELECTRONIC ARTS INC. (ERTS) Delisted | Director | 13,914 | — | — | $0 | 10 | 2011-11-02 |
| Starz Acquisition LLC (LCPAD) Delisted | President, CEO | 44,604 | — | — | $0 | 1 | 2011-09-27 |
| QVC Group, Inc. (LINTB) Delisted | President, CEO | 0 | — | — | -$4.60M | 12 | 2011-09-27 |
| QVC Group, Inc. (LSTZA) Delisted | President, CEO | 524,665 | — | — | $0 | 5 | 2011-07-07 |
| DIRECTV (DTV) Delisted | Director | 28,560 | — | — | -$25.59M | 13 | 2010-03-23 |
Recent Filings · Page 4 of 46
460 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2024-09-25 | BATRA | Notice (144) | −1,158,836 | -$46.57M | EDGAR |
| 2024-09-11 | SIRI | Mixed | +4,543,712 | $0 | EDGAR |
| 2024-09-11 | FWONK | Other (J) | −6,241,526 | $0 | EDGAR |
| 2024-09-11 | FWONK | Other (J) | −6,241,526 | $0 | EDGAR |
| 2024-08-30 | BATRK | Mixed | +19,712 | -$674.1K | EDGAR |
| 2024-08-28 | SIRI | Grant (A) | +486 | $0 | EDGAR |
| 2024-08-26 | Liberty Media Corp (LSXMK) Delisted | Mixed | +45,968 | -$827.0K | EDGAR |
| 2024-08-26 | FWONK | Mixed | +45,968 | -$827.0K | EDGAR |
| 2024-06-14 | LYV | Grant (A) | +4,019 | $0 | EDGAR |
| 2024-06-13 | TRIP | Grant (A) | +13,616 | $0 | EDGAR |
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.