S&CO INC LBRDK — LIBERTY BROADBAND SER C

Ownership history in S&CO INC  ·  45 quarters on record

AI Ownership Summary

S&CO INC reported LIBERTY BROADBAND SER C (LBRDK) in 45 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 1.67% in 2023 Q4. The latest visible filing shows LBRDK at 0.38% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.

What this LBRDK ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was S&CO INC's position in LIBERTY BROADBAND SER C, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2026 Q1

LBRDK was reported at 0.38% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
1.67% in 2023 Q4

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2023 Q4 to 2026 Q1

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

LBRDK stock page S&CO INC fund profile S&CO INC full holdings
How S&CO INC held LBRDK — position size vs. price
% of Fund (quarterly)    LBRDK price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 10 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 ADDED — — — 121,034 +434 +0.4% 0.38% $6K 2026-05-07 $37.49
2025 Q4 REDUCED 23.2% +3.5% ❌ 120,600 -36,531 -23.2% 0.36% $5.9M 2026-02-05 $52.02
2025 Q3 REDUCED 13.5% -23.3% ✅ 157,131 -24,597 -13.5% 0.61% $10.0M 2025-11-06 $50.21
2025 Q2 REDUCED — — — 181,728 -468 -0.3% 1.15% $17.9M 2025-08-07 $58.82
2025 Q1 UNCHANGED — — — 182,196 — 0% 1.04% $15.5M 2025-05-08 $87.64
2024 Q4 ADDED — — — 182,196 +1,135 +0.6% 0.92% $13.6M 2025-02-07 $72.77
2024 Q3 REDUCED — — — 181,061 -969 -0.5% 0.91% $14.0M 2024-11-07 $90.81
2024 Q2 REDUCED 10.0% +41.0% ❌ 182,030 -20,309 -10.0% 0.70% $10.0M 2024-08-08 $60.77
2024 Q1 REDUCED 25.1% -5.5% ✅ 202,339 -67,645 -25.1% 0.82% $11.6M 2024-05-09 $48.20
2023 Q4 REDUCED 7.3% -30.8% ✅ 269,984 -21,354 -7.3% 1.67% $21.8M 2024-02-12 $58.12
35 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding LBRDK

As of 2026 Q1 — sorted by position size

Hi-Line Capital Management, LLC 3Y 5.32% BANYAN CAPITAL MANAGEMENT, INC. 3Y 7Y 1.51% ALPINE ASSOCIATES MANAGEMENT INC. 3Y 7Y 1.4% LB Partners LLC 0.82% AIRE ADVISORS, LLC 3Y 0.28% Carnegie Lake Advisors LLC 0.26% Oak Thistle LLC 3Y 0.2% Assenagon Asset Management S.A. 3Y 7Y 0.17% Annis Gardner Whiting Capital Advisors, LLC 0.11% Alberta Investment Management Corp 3Y 7Y 0.08%

FAQ About S&CO INC and LBRDK

These are the practical questions this page is built to answer before you even open the full history table.

How long has S&CO INC reported owning LBRDK?

S&CO INC reported LBRDK across 10 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported LBRDK position in S&CO INC's portfolio?

The largest reported portfolio weight for LBRDK was 1.67% in 2023 Q4.

What is the latest reported LBRDK position on this page?

The most recent filing on this page is 2026 Q1, when S&CO INC reported 121,034 shares, equal to 0.38% of portfolio, with an estimated market value of $6K.

What does the chart on this LBRDK ownership page compare?

The chart compares S&CO INC's quarterly LBRDK portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did S&CO INC time their LBRDK position?

Based on 13F filing dates vs. subsequent LBRDK price moves, S&CO INC correctly timed 17 out of 36 reported position changes (47%). The annualised alpha on LBRDK relative to SPY over the holding period was -14.1%.

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