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United American Securities Inc. (d/b/a UAS Asset Management)

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13F filer, CIK 1349353, NEW YORK, NY

United American Securities Inc. (d/b/a UAS Asset Management) reported $415,717,948 across 11 holdings for the quarter ended 2025-03-31, in a 13F-HR filed 2025-05-15. Its ten largest share positions make up 99.81% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001349353-25-000005

Period
2025-03-31
Reported value
$416M
Holdings
11
Top 10 weight
99.81%
New
1
Sold out
5

Part of the filer group United American Securities Inc. (d/b/a UAS Asset Management)

How groups are built

Largest buys vs the previous quarter

SecurityShares changeApprox. value
UBERadded+162,057$11.8M
AMZNadded+44,947$8.55M
COSTadded+5,740$5.43M
NVDAnew+30,100$3.26M
CBadded+5,785$1.75M

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
GOOGLexited-83,924-$15.9M
AAPLreduced-41,587-$9.24M
TSLAexited-10,021-$4.05M
ROCKET LAB USA INCexited-122,640-$3.12M
ASMLexited-4,000-$2.77M

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, Q1 2025

Share positions as resolved from 13F-HR 0001349353-25-000005, largest first. % of portfolio is the value over $415,717,948, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
BRK-BBERKSHIRE HATHAWAY INC DELQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 311,115 shares; 2024Q4: 317,569 shares; 2025Q1: 315,188 shares 315,188$168M40.38%-2,381Timeline
AMZNAMAZON COM INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 379,683 shares; 2024Q4: 362,508 shares; 2025Q1: 407,455 shares 407,455$77.5M18.65%+44,947Timeline
MSFTMICROSOFT CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 193,661 shares; 2024Q4: 120,114 shares; 2025Q1: 118,324 shares 118,324$44.4M10.68%-1,790Timeline
COSTCOSTCO WHOLESALE CORPORATIONQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 37,528 shares; 2024Q4: 37,721 shares; 2025Q1: 43,461 shares 43,461$41.1M9.89%+5,740Timeline
METAMETA PLATFORMS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 45,439 shares; 2024Q4: 41,137 shares; 2025Q1: 41,469 shares 41,469$23.9M5.75%+332Timeline
UBERUBER TECHNOLOGIES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 5,875 shares; 2024Q4: 82,163 shares; 2025Q1: 244,220 shares 244,220$17.8M4.28%+162,057Timeline
TSMTAIWAN SEMICONDUCTOR MANUFACQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 88,867 shares; 2024Q4: 81,588 shares; 2025Q1: 83,802 shares 83,802$13.9M3.35%+2,214Timeline
CBCHUBB LIMITEDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 45,107 shares; 2024Q4: 40,246 shares; 2025Q1: 46,031 shares 46,031$13.9M3.34%+5,785Timeline
AAPLAPPLE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 91,651 shares; 2024Q4: 92,201 shares; 2025Q1: 50,614 shares 50,614$11.2M2.7%-41,587Timeline
NVDANVIDIA CORPORATIONQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 30,100 shares 30,100$3.26M0.78%newTimeline
BRK-ABERKSHIRE HATHAWAY INC DELQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1 shares; 2024Q4: 1 shares; 2025Q1: 1 shares 1$798K0.19%0Timeline

Sold out in Q1 2025

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
GOOGLALPHABET INC83,924$15.9Mshares
TSLATESLA INC10,021$4.05Mshares
ROCKET LAB USA INCROCKET LAB USA INC122,640$3.12Mshares
ASMLASML HLDG NV4,000$2.77Mshares
MANUMANCHESTER UTD PLC NEW10,000$174Kshares

How Q1 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 0001349353-25-000005 base2025-05-15acceptance time not in the bulk data set