What is SEC Form 13F? Ultimate Guide to Institutional Equity Filings
Learn how SEC Form 13F filings work, the $100M threshold, 45-day reporting lag, and how to track top hedge fund holdings.
CIK: 0001425041
Total reported value
$147.6M
$147.6M
17 檔
54.9%
According to the latest 13F quarterly dataset, Bislett Management, LLC managed an equity portfolio of $147.6M at the end of Q4 2025, spanning 17 distinct U.S. exchange-listed positions.
Bislett Management, LLC executed strategic sector rebalancing during Q4 2025, establishing 3 new positions while fully exiting 2 holdings and trimming 3 positions.
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | BRK-A | Berkshire Hathaway Inc-cl A | Stock-Other | 20.04% | -1.63% | — | |
| 2 | WSC | Willscot Holdings CORP | Stock-Industrials | 14.35% | +4.71% | — | |
| 3 | GOOG | Alphabet Inc-cl C | Stock-Comm Services | 11.90% | +0.91% | — | |
| 4 | SIRI | Sirius Xm Holdings Inc | Stock-Comm Services | 9.10% | +1.33% | -19.28% | |
| 5 | LBRDA | Liberty Broadband-a | Stock-Other | 6.04% | -2.26% | — | |
| 6 | KO | Coca-cola Co/the | Stock-Consumer Staples | 5.30% | -0.36% | — | |
| 7 | FWONA | Liberty Media Corp-formula-a | Stock-Other | 4.75% | -0.07% | -12.50% | |
| 8 | BRK-B | Berkshire Hathaway Inc-cl B | Stock-Other | 4.19% | -0.34% | — | |
| 9 | GLIBK | Liberty Capital Corp-cl C | Stock-Other | 3.90% | -1.77% | — | |
| 10 | CMCSA | Comcast Corp-class A | Stock-Comm Services | 3.63% | +0.12% | -36.00% | |
| 11 | BATRK | Atlanta Braves Holdings In-c | Stock-Other | 3.09% | +0.23% | — | |
| 12 | AMRZ | Amrize Ltd | Stock-Materials | 2.46% | +0.12% | — | |
| 13 | BATRA | Atlanta Braves Holdings In-a | Stock-Other | 2.42% | +0.13% | — | |
| 14 | MLM | Martin Marietta Materials | Stock-Materials | 2.36% | -0.32% | — | |
| 15 | LLYVK | Liberty Live Holdings-c | Stock-Other | 2.21% | -0.04% | — | |
| 16 | LLYVA | Liberty Live Holdings-a | Stock-Other | 2.16% | -0.07% | — | |
| 17 | GLIBA | Liberty Capital CORP | Stock-Other | 2.10% | -0.65% | +87.50% |
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | GOOG | Alphabet Inc-cl C | +3.1% | — | Unchanged |
| 2 | GLIBA | Liberty Capital CORP | +1% | +87.50% | Add |
| 3 | BRK-A | Berkshire Hathaway Inc-cl A | +0.9% | — | Unchanged |
| 4 | KO | Coca-cola Co/the | +0.5% | — | Unchanged |
| 5 | AMRZ | Amrize Ltd | +0.4% | — | Unchanged |
| 6 | BRK-B | Berkshire Hathaway Inc-cl B | +0.2% | — | Unchanged |
| 7 | MLM | Martin Marietta Materials | +0.1% | — | Unchanged |
| 8 | BATRK | Atlanta Braves Holdings In-c | 0% | — | Unchanged |
| 9 | BATRA | Atlanta Braves Holdings In-a | -0.1% | — | Unchanged |
| 10 | FWONA | Liberty Media Corp-formula-a | -0.8% | -12.50% | Trim |
| 11 | WSC | Willscot Holdings CORP | -1% | — | Unchanged |
| 12 | LBRDA | Liberty Broadband-a | -1.5% | — | Unchanged |
| 13 | CMCSA | Comcast Corp-class A | -2.1% | -36.00% | Trim |
| 14 | SIRI | Sirius Xm Holdings Inc | -3.4% | -19.28% | Trim |
| 15 | GLIBK | Liberty Capital Corp-cl C | — | NEW | New buy |
| 16 | LLYVK* | Liberty Media Corp-liberty-c | — | EXIT | Sold out |
| 17 | LLYVA* | Liberty Media Corp-liberty-a | — | EXIT | Sold out |
| 18 | LLYVK | Liberty Live Holdings-c | — | NEW | New buy |
| 19 | LLYVA | Liberty Live Holdings-a | — | NEW | New buy |
According to official SEC Form 13F filings, Bislett Management, LLC reported a total U.S. public equity portfolio value of $147.6M across 17 disclosed positions in Q4 2025.
Expert Analysis & Guides for Tracking Wall Street Smart Money Movements
Learn how SEC Form 13F filings work, the $100M threshold, 45-day reporting lag, and how to track top hedge fund holdings.
In terms of portfolio concentration, the top 5 core holdings (including BRK-A, WSC, GOOG) accounted for 54.9% of total reported equity market value during Q4 2025.
Top New Position Initiated
GLIBK
市值: $5.1M
Top Position Liquidated / Trimmed
LLYVK*
前期市值: $3.9M
During Q4 2025, Bislett Management, LLC's top holdings by market value included BRK-A (20.0%)、WSC (14.3%)、GOOG (11.9%). The largest single position, BRK-A, represented 20.0% of total portfolio value.
In Q4 2025, Bislett Management, LLC made 9 total portfolio adjustments, initiating 3 new buys, adding to 1 positions, trimming 3 holdings, and fully liquidating 2 stocks.
All holding records on this page are fetched directly from the U.S. Securities and Exchange Commission (SEC) EDGAR system (Form 13F-HR). AlphaSMO parses CUSIP identifiers and formats data into Schema.org-compliant datasets.
Understand SEC Form 4 insider disclosures for corporate officers, directors, and 10% owners to track executive transactions.
Understand Rule 144 restricted stock sale notices to spot planned insider liquidations before market sell pressure arrives.
Explore the 5% beneficial ownership threshold, 13D vs 13G filing differences, and recent SEC accelerated deadline rules.
Best practices for analyzing 13F quarterly changes without getting misled by stock splits, options, or market valuation drift.
Learn how AlphaSMO's flagship signal detects high-conviction stocks where 13F hedge funds and corporate insiders buy at the same time.