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BISLETT MANAGEMENT, LLC

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13F filer, CIK 1425041, Palo Alto, CA

BISLETT MANAGEMENT, LLC reported $138,098,632 across 16 holdings for the quarter ended 2025-09-30, in a 13F-HR filed 2025-11-13. Its ten largest share positions make up 86.51% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0000935836-25-000663

Period
2025-09-30
Reported value
$138M
Holdings
16
Top 10 weight
86.51%
New
1
Sold out
0

Largest buys vs the previous quarter

SecurityShares changeApprox. value
LBRDAadded+25,000$1.58M
GLIBAnew+40,000$1.5M
AMRZadded+10,000$485K

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
LLYVKreduced-20,000-$1.94M
LLYVAreduced-20,000-$1.89M
SIRIreduced-30,003-$698K
FWONAreduced-5,000-$476K

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q3 2025

Share positions as resolved from 13F-HR 0000935836-25-000663, largest first. % of portfolio is the value over $138,098,632, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
BRK-ABERKSHIRE HATHAWAY INC DELQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 35 shares; 2024Q4: 35 shares; 2025Q1: 35 shares; 2025Q2: 35 shares; 2025Q3: 35 shares 35$26.4M19.11%0Timeline
WSCWILLSCOT HLDGS CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,170,000 shares; 2024Q4: 1,110,000 shares; 2025Q1: 1,025,000 shares; 2025Q2: 1,005,000 shares; 2025Q3: 1,005,000 shares 1,005,000$21.2M15.36%0Timeline
SIRISIRIUSXM HOLDINGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 900,000 shares; 2024Q4: 819,962 shares; 2025Q1: 815,183 shares; 2025Q2: 773,309 shares; 2025Q3: 743,306 shares 743,306$17.3M12.53%-30,003Timeline
GOOGALPHABET INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 50,000 shares; 2024Q4: 50,000 shares; 2025Q1: 50,000 shares; 2025Q2: 50,000 shares; 2025Q3: 50,000 shares 50,000$12.2M8.82%0Timeline
LBRDALIBERTY BROADBAND CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 140,000 shares; 2024Q4: 140,000 shares; 2025Q1: 140,000 shares; 2025Q2: 140,000 shares; 2025Q3: 165,000 shares 165,000$10.4M7.57%+25,000Timeline
CMCSACOMCAST CORP NEWQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 175,000 shares; 2024Q4: 210,000 shares; 2025Q1: 240,000 shares; 2025Q2: 250,000 shares; 2025Q3: 250,000 shares 250,000$7.86M5.69%0Timeline
FWONALIBERTY MEDIA CORP DELQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 96,276 shares; 2024Q4: 90,000 shares; 2025Q1: 85,000 shares; 2025Q2: 85,000 shares; 2025Q3: 80,000 shares 80,000$7.62M5.52%-5,000Timeline
KOCOCA COLA COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 100,000 shares; 2024Q4: 100,000 shares; 2025Q1: 100,000 shares; 2025Q2: 100,000 shares; 2025Q3: 100,000 shares 100,000$6.63M4.8%0Timeline
BRK-BBERKSHIRE HATHAWAY INC DELQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 11,000 shares; 2024Q4: 11,000 shares; 2025Q1: 11,000 shares; 2025Q2: 11,000 shares; 2025Q3: 11,000 shares 11,000$5.53M4%0Timeline
BATRKATLANTA BRAVES HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 103,330 shares; 2024Q4: 103,330 shares; 2025Q1: 103,330 shares; 2025Q2: 103,330 shares; 2025Q3: 103,330 shares 103,330$4.3M3.11%0Timeline
LLYVKLIBERTY MEDIA CORP DELQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 70,000 shares; 2024Q4: 60,000 shares; 2025Q1: 60,000 shares; 2025Q2: 60,000 shares; 2025Q3: 40,000 shares 40,000$3.88M2.81%-20,000Timeline
LLYVALIBERTY MEDIA CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 70,000 shares; 2024Q4: 60,000 shares; 2025Q1: 60,000 shares; 2025Q2: 60,000 shares; 2025Q3: 40,000 shares 40,000$3.77M2.73%-20,000Timeline
BATRAATLANTA BRAVES HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 75,000 shares; 2024Q4: 75,000 shares; 2025Q1: 75,000 shares; 2025Q2: 75,000 shares; 2025Q3: 75,000 shares 75,000$3.41M2.47%0Timeline
MLMMARTIN MARIETTA MATLS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 5,000 shares; 2025Q2: 5,000 shares; 2025Q3: 5,000 shares 5,000$3.15M2.28%0Timeline
AMRZAMRIZE LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 50,000 shares; 2025Q3: 60,000 shares 60,000$2.91M2.11%+10,000Timeline
GLIBALIBERTY CAP CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 40,000 shares 40,000$1.5M1.09%newTimeline

How Q3 2025 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0000935836-25-000663 base2025-11-13acceptance time not in the bulk data set