BM
Bislett Management, LLC 13F Filings Tracker & Latest Positions (Q2 2026)
Bislett Management, LLCCIK: 0001425041
Sector-focusedMomentum followerQuality / disciplined sizing
Total reported value
$147.6M
Reporting period: 2026-06-30 · Number of holdings: 18
BISLETT MANAGEMENT, LLC disclosed 18 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $147.6M and a quarterly turnover rate of 20.1%.
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Personality snowflake
- Concentration
- 42.78
- Portfolio Stability
- 20.06
- Momentum
- 100
- Sector conviction
- 100
- Diversification
- 36
- Sizing Uniformity
- 90.1
Bislett Management, LLC's disclosed holdings carry a Herfindahl concentration index of 0.107 — mathematically equivalent to about 9 equally-sized positions, well below its 18 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.99), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
Recent activity leans toward adding more aggressively to already-large existing positions than to newly initiated ones (a 3.1 percentage-point tilt) — a pattern consistent with a momentum-following approach.
Sector classification currently covers about 56% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govAdd WSC
-7.5% $9.4M
Trim LBRDA
0.0% -$2.4M
Trim GLIBK
+8.7% -$1.9M
Trim BRK-A
0.0% $1.1M
Add SIRI
0.0% $3.9M
Add GOOG
0.0% $3.3M
Holdings Map
New buyAddUnchangedTrim
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Data Source Notice: AlphaSMO is the web's most authoritative 13F / Inside Trader database. Institutional holdings and insider trades presented here are precisely computed to deliver accurate portfolio reporting.
Top 10 holdings by weight
Full holdings list this quarter
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | WSC | Willscot Holdings CORP | Stock-Industrials | 18.17% | +4.71% | -7.51% | |
| 2 | BRK-A | Berkshire Hathaway Inc-cl A | Stock-Other | 17.76% | -1.63% | — | |
| 3 | SIRI | Sirius Xm Holdings Inc | Stock-Comm Services | 12.01% | +1.33% | — | |
| 4 | GOOG | Alphabet Inc-cl C | Stock-Comm Services | 11.97% | +0.91% | — | |
| 5 | KO | Coca-cola Co/the | Stock-Consumer Staples | 5.51% | -0.36% | — | |
| 6 | FWONA | Liberty Media Corp-formula-a | Stock-Other | 4.15% | -0.07% | — | |
| 7 | BRK-B | Berkshire Hathaway Inc-cl B | Stock-Other | 3.73% | -0.34% | — | |
| 8 | CMCSA | Comcast Corp-class A | Stock-Comm Services | 3.66% | +0.12% | +37.50% | |
| 9 | BATRK | Atlanta Braves Holdings In-c | Stock-Other | 3.63% | +0.23% | — | |
| 10 | LBRDA | Liberty Broadband-a | Stock-Other | 3.16% | -2.26% | — | |
| 11 | BATRA | Atlanta Braves Holdings In-a | Stock-Other | 2.86% | +0.13% | — | |
| 12 | AMRZ | Amrize Ltd | Stock-Materials | 2.71% | +0.12% | +25.00% | |
| 13 | LLYVK | Liberty Live Holdings-c | Stock-Other | 2.50% | -0.04% | — | |
| 14 | LLYVA | Liberty Live Holdings-a | Stock-Other | 2.40% | -0.07% | — | |
| 15 | GLIBK | Liberty Capital Corp-cl C | Stock-Other | 2.19% | -1.77% | +8.67% | |
| 16 | MLM | Martin Marietta Materials | Stock-Materials | 1.95% | -0.32% | — | |
| 17 | GLIBA | Liberty Capital CORP | Stock-Other | 1.48% | -0.65% | +33.33% | |
| 18 | VSNT | Versant Media Group Inc | Stock-Comm Services | 0.16% | -0.02% | — |
Portfolio Performance
Performance for Q3 2026
-3.5%
Performance Last 4 Quarters
+2.9%
Based on 77% of reported portfolio value with available pricing
- Stdev
- +18.9%
- Beta
- +1.01
- Alpha
- -23.4%
- Max Drawdown
- -24.5%
- Annualized Perf
- -4.8%
- Batting Avg vs S&P
- +30.6%
- Sortino
- -0.24
- Stutzer
- -0.05
- Treynor
- -0.03
- Sterling
- -0.2
- Calmar
- -0.2
- Information Ratio
- -1.69
- Tracking Error
- +13.7%
- Stdev Down
- +13.5%
- Winning Months %
- +41.7%
- Losing Months %
- +58.3%
- Best 12 Months
- +7.3%
- Worst 12 Months
- -19.4%
- Efficiency Ratio
- +0.08
- Sharpe
- -0.17
- Stdev Sectors
- +17.1%
- Skewness
- +0.03
- Kurtosis
- -0.5
- Upside Potential
- +1.92
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 18 | $147.6M | 20 | ||
| 2026 Q1 | 18 | $129.6M | 8 | ||
| 2025 Q4 | 17 | $131.8M | 29 | ||
| 2025 Q3 | 16 | $138.1M | 17 | ||
| 2025 Q2 | 15 | $146.2M | 0 | ||
| 2025 Q1 | 14 | $141.3M | 100 | ||
| 2024 Q4 | 13 | $141.3M | 0 | ||
| 2024 Q3 | 13 | $149.4M | 0 | ||
| 2024 Q2 | 15 | $139.0M | 0 | ||
| 2024 Q1 | 16 | $159.6M | 0 | ||
| 2023 Q4 | 16 | $156.3M | 0 | ||
| 2023 Q3 | 15 | $141.8M | 0 | ||
| 2023 Q2 | 13 | $154.6M | 0 | ||
| 2023 Q1 | 13 | $150.6M | 0 | ||
| 2022 Q4 | 13 | $138.9M | 0 | ||
| 2022 Q3 | 15 | $145.8M | 0 | ||
| 2022 Q2 | 14 | $151.6M | 0 | ||
| 2022 Q1 | 14 | $190.8M | 0 | ||
| 2021 Q4 | 15 | $207.7M | 0 | ||
| 2021 Q3 | 15 | $201.4M | 0 | ||
| 2021 Q2 | 15 | $203.6M | 99 | ||
| 2021 Q1 | 15 | $198.4M | 21 | ||
| 2020 Q4 | 16 | $178.4M | 48 | ||
| 2020 Q3 | 17 | $161.1M | 48 | ||
| 2020 Q2 | 18 | $144.7M | 19 | ||
| 2020 Q1 | 17 | $125.9M | 32 | ||
| 2019 Q4 | 18 | $174.5M | 24 | ||
| 2019 Q3 | 18 | $168.8M | 11 | ||
| 2019 Q2 | 18 | $164.1M | 13 | ||
| 2019 Q1 | 20 | $165.5M | 18 | ||
| 2018 Q4 | 20 | $148.8M | 22 | ||
| 2018 Q3 | 20 | $185.9M | 13 | ||
| 2018 Q2 | 21 | $180.6M | 28 | ||
| 2018 Q1 | 22 | $179.9M | 36 | ||
| 2017 Q4 | 23 | $172.3M | 15 | ||
| 2017 Q3 | 24 | $168.3M | 15 | ||
| 2017 Q2 | 24 | $164.2M | 14 | ||
| 2017 Q1 | 26 | $159.8M | 18 | ||
| 2016 Q4 | 26 | $154.5M | 25 | ||
| 2016 Q3 | 29 | $151.1M | 11 | ||
| 2016 Q2 | 25 | $144.8M | 19 | ||
| 2016 Q1 | 22 | $147.7M | 33 | ||
| 2015 Q4 | 24 | $144.0M | 9 | ||
| 2015 Q3 | 26 | $142.5M | 14 | ||
| 2015 Q2 | 25 | $145.5M | 12 | ||
| 2015 Q1 | 26 | $158.6M | 97 | ||
| 2014 Q4 | 26 | $147.9M | 0 | ||
| 2014 Q3 | 26 | $152.5M | 16 | ||
| 2014 Q2 | 26 | $168.1M | 9 | ||
| 2014 Q1 | 25 | $158.5M | 16 | ||
| 2013 Q4 | 25 | $154.7M | 14 | ||
| 2013 Q3 | 28 | $152.8M | 9 | ||
| 2013 Q2 | 28 | $150.5M | 0 |
Holding changes this quarter
Bislett Management, LLC's most significant position changes for 2026-06-30: Trim: Willscot Holdings CORP (WSC) — shares -7.51%; Add: Liberty Capital Corp-cl C (GLIBK) — shares +8.67%; Add: Liberty Capital CORP (GLIBA) — shares +33.33%; Add: Comcast Corp-class A (CMCSA) — shares +37.50%; Add: Amrize Ltd (AMRZ) — shares +25.00%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | WSC | Willscot Holdings CORP | +4.7% | -7.51% | Trim |
| 2 | SIRI | Sirius Xm Holdings Inc | +1.3% | — | Unchanged |
| 3 | GOOG | Alphabet Inc-cl C | +0.9% | — | Unchanged |
| 4 | BATRK | Atlanta Braves Holdings In-c | +0.2% | — | Unchanged |
| 5 | BATRA | Atlanta Braves Holdings In-a | +0.1% | — | Unchanged |
| 6 | CMCSA | Comcast Corp-class A | +0.1% | +37.50% | Add |
| 7 | AMRZ | Amrize Ltd | +0.1% | +25.00% | Add |
| 8 | VSNT | Versant Media Group Inc | 0% | — | Unchanged |
| 9 | LLYVK | Liberty Live Holdings-c | 0% | — | Unchanged |
| 10 | FWONA | Liberty Media Corp-formula-a | -0.1% | — | Unchanged |
| 11 | LLYVA | Liberty Live Holdings-a | -0.1% | — | Unchanged |
| 12 | MLM | Martin Marietta Materials | -0.3% | — | Unchanged |
| 13 | BRK-B | Berkshire Hathaway Inc-cl B | -0.3% | — | Unchanged |
| 14 | KO | Coca-cola Co/the | -0.4% | — | Unchanged |
| 15 | GLIBA | Liberty Capital CORP | -0.7% | +33.33% | Add |
| 16 | BRK-A | Berkshire Hathaway Inc-cl A | -1.6% | — | Unchanged |
| 17 | GLIBK | Liberty Capital Corp-cl C | -1.8% | +8.67% | Add |
| 18 | LBRDA | Liberty Broadband-a | -2.3% | — | Unchanged |
Filing History
FAQ
What is Bislett Management, LLC and what type of investor is it?
Bislett Management, LLC is an investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $147.6M, spread across 18 disclosed positions.
What are Bislett Management, LLC's largest equity positions?
Based on the latest 13F filing, Bislett Management, LLC's top holdings by market value are:
1. Willscot Holdings CORP (WSC) — $26.8M (18.2%)
2. Berkshire Hathaway Inc-cl A (BRK-A) — $26.2M (17.8%)
3. Sirius Xm Holdings Inc (SIRI) — $17.7M (12.0%)
4. Alphabet Inc-cl C (GOOG) — $17.7M (12.0%)
5. Coca-cola Co/the (KO) — $8.1M (5.5%)
What changes did Bislett Management, LLC make in its most recent portfolio filing?
In the latest reported quarter, Bislett Management, LLC made 5 notable position adjustments: 0 new positions were initiated, 4 existing holdings were added to, 1 positions were partially reduced, and 0 were completely exited. The largest of these moves: Trim: Willscot Holdings CORP (WSC) — shares -7.51%; Add: Liberty Capital Corp-cl C (GLIBK) — shares +8.67%; Add: Liberty Capital CORP (GLIBA) — shares +33.33%; Add: Comcast Corp-class A (CMCSA) — shares +37.50%; Add: Amrize Ltd (AMRZ) — shares +25.00%
What sectors does Bislett Management, LLC focus on?
Bislett Management, LLC is concentrated in the following sectors based on its current disclosed equity portfolio:
• Communication Services: 49.5%
• Industrials: 32.4%
• Consumer Staples: 9.8%
• Materials: 8.3%
Investment Profile
Bislett Management, LLC returned an annualized -4.8% over the trailing 36 months — underperforming the S&P 500 by 23.4 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 1.01 (roughly in line with the market) and a 31% quarterly batting average against the index.
Its portfolio is moderately concentrated and moderately active, with 49.5% of the portfolio concentrated in Communication Services.
Its turnover score has risen from 0 to 20 over the past 4 quarters — a shift toward more active trading.
It has added to its SIRI position over the past two quarters (+$5.7M, now $17.7M), while trimming LBRDA over the same stretch (-$3.3M, still holding $4.7M).
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Developer Access
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