SCHEDULE 13D/A Filed 2026-08-20 Event 2026-08-19 SEC 0001104659-26-099311 →

DUNCAN RONALD A → Liberty Broadband Corporation

Stake: — Shares: 0 Class: Series A Cumulative Redeemable Preferred Stock

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)

34 transactions

0 buys · 17 sales · 6 awards/exercises

Issuer Cluster

8 13D/G filings on this issuer

7 other filings besides this one

Filer Track Record

5 filings by this filer

4 other filings in the data moat

Short Interest

—

Not in latest FINRA snapshot

Institutional Consensus · 2025-12-31

Held by elite portfolio managers

1 holder · $10.67M

Point72 Asset Mgmt

Form 4 Insider Transactions · last 365d

Date	Insider	Role	Type	Shares	Price	Value
2026-08-19	MALONE JOHN C	director, 10%+ owner	X	66,000	$88.37	$5.83M
2026-08-19	MALONE JOHN C	director, 10%+ owner	Disposition	1,153,227	—	—
2026-08-19	MALONE JOHN C	director, 10%+ owner	Disposition	58,184	—	—
2026-08-19	MALONE JOHN C	director, 10%+ owner	Disposition	6,614,933	—	—
2026-08-19	MALONE JOHN C	director, 10%+ owner	Disposition	122,649	—	—
2026-08-19	MALONE JOHN C	director, 10%+ owner	Disposition	25,444	—	—
2026-08-19	MALONE JOHN C	director, 10%+ owner	Disposition	57,641	—	—
2026-08-19	MALONE JOHN C	director, 10%+ owner	Disposition	357,106	—	—
2026-08-19	MALONE JOHN C	director, 10%+ owner	Disposition	213,332	—	—
2026-08-19	MALONE JOHN C	director, 10%+ owner	E	66,000	$120.77	$7.97M
2026-08-19	MALONE JOHN C	director, 10%+ owner	J	868,000	$120.77	$104.83M
2026-08-19	MALONE JOHN C	director, 10%+ owner	J	868,000	$88.37	$76.70M
2026-08-19	MALONE JOHN C	director, 10%+ owner	J	400,000	$114.00	$45.60M
2026-08-19	MALONE JOHN C	director, 10%+ owner	J	400,000	$71.55	$28.62M
2026-08-18	MALONE JOHN C	director, 10%+ owner	X	66,000	$88.37	$5.83M
2026-08-18	MALONE JOHN C	director, 10%+ owner	E	66,000	$120.77	$7.97M
2026-02-18	WARGO J DAVID	director	Sale	7,000	$55.37	$388K
2026-02-18	WARGO J DAVID	director	Sale	18,000	$55.54	$1000K
2026-02-10	WARGO J DAVID	director	Sale	12,392	$57.17	$708K
2026-02-10	WARGO J DAVID	director	Sale	32,058	$57.35	$1.84M
2026-02-10	WARGO J DAVID	director	Sale	530	$57.48	$30K
2026-02-10	WARGO J DAVID	director	Sale	1,702	$57.65	$98K
2025-12-09	Wendling Brian J	officer	Option exercise	1,461	—	—
2025-12-09	Wilm Renee L	officer	Option exercise	2,850	—	—
2025-12-09	Patterson Martin Edward	officer	Option exercise	414	—	—

Showing 25 of 34

Other 13D/G Filings on Liberty Broadband Corporation

Filed	Form	Filer	Stake	Shares
2026-08-20	SCHEDULE 13D/A	MALONE JOHN C	—	0	view →
2026-08-20	SCHEDULE 13D/A	MALONE JOHN C	—	0	view →
2023-01-25	SC	MALONE JOHN C	—	—	view →
2022-07-19	SC	MALONE JOHN C	—	—	view →
2022-03-08	SC	MAFFEI GREGORY B	—	—	view →
2020-11-30	SC	MALONE JOHN C	—	—	view →
2020-06-29	SC	MALONE JOHN C	—	—	view →

Other Filings by DUNCAN RONALD A

Filed	Form	Issuer	Stake	Shares
2026-08-20	SCHEDULE 13G	Charter Communications, Inc.	—	—	view →
2020-12-22	SC	GRIZZLY MERGER SUB 1, LLC	—	—	view →
2018-03-13	SC	GCI LIBERTY, INC.	—	—	view →
2018-03-13	SC	GCI LIBERTY, INC.	—	—	view →

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