Liberty Broadband Corporation - Class C (LBRDK)
LBRDK moved a median of +0.09% 30 minutes after news, and 0.00% by the close. How LBRDK actually reacts to news — the realized, point-in-time move the market made, measured across 73 labeled events over the last three years with zero look-ahead.
LBRDK’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | +0.01% | 52% | 71 |
| 30-min | +0.09% | 54% | 71 |
| 60-min | +0.03% | 51% | 71 |
| to close | 0.00% | 48% | 73 |
| Middle 50% of LBRDK reactions | -0.25% to +0.40% |
|---|---|
| Median reaction (30-min) | +0.09% |
| Measured reactions | 73 |
Half of all Liberty Broadband Corporation - Class C news events land between -0.25% and +0.40% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when LBRDK moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to LBRDK's baseline. Nothing else.
Recent LBRDK events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 15-12G Liberty Broadband Corp | SEC filing · Form 15-12G | SEC EDGAR | — | — | |
| Form 8-K Liberty Broadband Corp For: Aug 19 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form POSASR Liberty Broadband Corp | SEC filing · Form POSASR | SEC EDGAR | — | — | |
| Form S-8 POS Liberty Broadband Corp | SEC filing · Form S-8 | SEC EDGAR | — | — | |
| Form 10-Q Liberty Broadband Corp For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.06% | +1.15% | |
| Form 8-K Liberty Broadband Corp For: Jul 14 | SEC filing · Form 8-K | SEC EDGAR | +1.84% | +2.90% | |
| Liberty Broadband Corporation to Conduct Quarterly Q&A Conference Call | Press release | Business Wire | +1.84% | +2.90% | |
| Form 15-15D Liberty Broadband Corp | SEC filing · Form 15-15D | SEC EDGAR | +0.85% | +2.56% | |
| Form S-8 POS Liberty Broadband Corp | SEC filing · Form S-8 | SEC EDGAR | +0.85% | +2.56% | |
| Form 8-K Liberty Broadband Corp For: May 15 | SEC filing · Form 8-K | SEC EDGAR | +0.54% | +0.39% | |
| Liberty Broadband Corporation Declares Quarterly Cash Dividend on Series A Cumulative Redeemable Preferred Stock | Press release | Business Wire | +1.83% | +1.48% | |
| Form 8-K Liberty Broadband Corp For: May 12 | SEC filing · Form 8-K | SEC EDGAR | -1.98% | -6.19% | |
| Form 8-K Liberty Broadband Corp For: May 11 | SEC filing · Form 8-K | SEC EDGAR | -1.20% | -2.75% | |
| Form 10-Q Liberty Broadband Corp For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +1.57% | -6.89% | |
| Form 8-K Liberty Broadband Corp For: Apr 20 | SEC filing · Form 8-K | SEC EDGAR | -0.83% | -1.08% | |
| Liberty Broadband Corporation to Conduct Quarterly Q&A Conference Call | Press release | Business Wire | +0.62% | -1.09% | |
| Form ARS Liberty Broadband Corp For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | -0.03% | +0.20% | |
| Form DEF 14A Liberty Broadband Corp For: May 11 | SEC filing · Form DEF | SEC EDGAR | -0.03% | +0.20% | |
| Form 8-K Liberty Broadband Corp For: Mar 12 | SEC filing · Form 8-K | SEC EDGAR | +0.77% | +1.41% | |
| Liberty Broadband Corporation Declares Quarterly Cash Dividend on Series A Cumulative Redeemable Preferred Stock | Press release | Business Wire | +0.00% | -0.22% | |
| Form 8-K Liberty Broadband Corp For: Mar 05 | SEC filing · Form 8-K | SEC EDGAR | -1.29% | -2.19% | |
| Form 8-K Liberty Broadband Corp For: Mar 06 | SEC filing · Form 8-K | SEC EDGAR | -1.29% | -2.19% | |
| Form 8-K Liberty Broadband Corp For: Mar 05 | SEC filing · Form 8-K | SEC EDGAR | +0.30% | +0.82% | |
| Liberty Broadband Corporation Announces 2026 Virtual Annual Meeting of Stockholders | Press release | Business Wire | +0.30% | +0.82% | |
| Form 10-K Liberty Broadband Corp For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -0.78% | -0.95% | |
| Form 8-K Liberty Broadband Corp For: Jan 13 | SEC filing · Form 8-K | SEC EDGAR | -1.38% | -3.85% | |
| Liberty Broadband Corporation to Conduct Quarterly Q&A Conference Call | Press release | Business Wire | -0.81% | +1.49% | |
| Form 8-K Liberty Broadband Corp For: Dec 16 | SEC filing · Form 8-K | SEC EDGAR | -0.43% | -1.06% | |
| Liberty Broadband Corporation Declares Quarterly Cash Dividend on Series A Cumulative Redeemable Preferred Stock | Press release | Business Wire | +0.00% | +1.12% | |
| Form 8-K Liberty Broadband Corp For: Nov 19 | SEC filing · Form 8-K | SEC EDGAR | +0.94% | +0.22% | |
| Form 8-K Liberty Broadband Corp For: Nov 13 | SEC filing · Form 8-K | SEC EDGAR | +0.36% | +0.98% | |
| Form 10-Q Liberty Broadband Corp For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.21% | +0.25% | |
| Form 8-K Liberty Broadband Corp For: Oct 10 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -0.64% | |
| Liberty Broadband Corporation to Conduct Quarterly Q&A Conference Call | Press release | Business Wire | +0.00% | -0.45% | |
| Form 8-K Liberty Broadband Corp For: Aug 21 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -1.44% | |
| Liberty Broadband Corporation Declares Quarterly Cash Dividend on Series A Cumulative Redeemable Preferred Stock | Press release | Business Wire | +0.22% | +2.18% | |
| Form 10-Q Liberty Broadband Corp For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.15% | -0.76% | |
| Form 8-K Liberty Broadband Corp For: Jul 15 | SEC filing · Form 8-K | SEC EDGAR | — | -0.83% | |
| Form 8-K/A Liberty Broadband Corp For: Nov 11 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +1.33% | |
| Form 8-K Liberty Broadband Corp For: Jul 10 | SEC filing · Form 8-K | SEC EDGAR | -1.10% | -3.97% | |
| Liberty Broadband Corporation to Conduct Quarterly Q&A Conference Call | Press release | Business Wire | +0.00% | -1.02% | |
| Liberty Broadband Corporation Completes Spin-Off of GCI Liberty, Inc. | Press release | Business Wire | -1.10% | -3.97% | |
| Form 8-K Liberty Broadband Corp For: Jul 10 | SEC filing · Form 8-K | SEC EDGAR | +0.24% | +2.20% | |
| Liberty Broadband Corporation Announces When-Issued Trading, Ex-Dividend Date and Trading Symbol Information in Connection with Upcoming Spin-Off of GCI Liberty, Inc. | Press release | Business Wire | +0.00% | -1.06% | |
| Form 8-K Liberty Broadband Corp For: Jul 01 | SEC filing · Form 8-K | SEC EDGAR | -0.53% | -1.55% | |
| Form 8-K Liberty Broadband Corp For: Jun 23 | SEC filing · Form 8-K | SEC EDGAR | +1.15% | +2.68% | |
| Form 8-K Liberty Broadband Corp For: Jun 19 | SEC filing · Form 8-K | SEC EDGAR | +1.34% | +2.06% | |
| Liberty Broadband Corporation Announces Record Date and Distribution Date for Spin-Off of GCI Liberty, Inc. | Press release | Business Wire | +1.34% | +2.06% | |
| Form 11-K Liberty Broadband Corp For: Dec 31 | SEC filing · Form 11-K | SEC EDGAR | +0.00% | +0.45% | |
| Form 8-K Liberty Broadband Corp For: May 27 | SEC filing · Form 8-K | SEC EDGAR | -1.03% | -0.88% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the LBRDK section they belong to.
Where else LBRDK is measured.
LBRDK earnings → · Analyst actions → · SEC filings →
Other Communication Services names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| KONATEL INC (KTEL) | 80 | +1.87% | 60% |
| Liberty Capital Corporation - Series A GCI Group (GLIBA) | 73 | +0.05% | 54% |
| QUEBECOR INC B (QBCRF) | 70 | 0.00% | 23% |
| Cogeco Communications Inc (CCA_TSE) | 69 | -0.01% | 47% |
Same sector, same measurement: percent move vs. the price at the news timestamp, read at 30 minutes. Sample sizes differ, so the medians are comparable but the confidence behind them is not.
All Communication Services names, measured the same way →
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Every name we’ve measured, in one place.
How the numbers are made.
How is Liberty Broadband Corporation - Class C's median reaction calculated?
Every labeled LBRDK news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 73 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 54% of LBRDK's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does LBRDK's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.