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SRB CORP

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13F filer, CIK 1496228, BOSTON, MA

SRB CORP reported $1,533,166,485 across 23 holdings for the quarter ended 2025-03-31, in a 13F-HR filed 2025-05-14. Its ten largest share positions make up 71.76% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0000904454-25-000270

Period
2025-03-31
Reported value
$1.53B
Holdings
23
Top 10 weight
71.76%
New
2
Sold out
2

Part of the filer group SRB CORP

How groups are built

Largest buys vs the previous quarter

SecurityShares changeApprox. value
XLKnew+511,482$106M
XLCadded+679,569$65.5M
XLBadded+694,800$59.7M
INTCnew+2,185,098$49.6M
XLYadded+59,578$11.8M

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
VGTexited-272,826-$170M
SHWreduced-141,390-$49.4M
BRK-Bexited-106,799-$48.4M
RSreduced-136,844-$39.5M
CMCSAreduced-1,002,697-$37M

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 0000904454-25-000270, largest first. % of portfolio is the value over $1,533,166,485, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
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: 748,727 shares; 2024Q4: 748,727 shares; 2025Q1: 693,012 shares 693,012$260M16.97%-55,715Timeline
SAFTSAFETY INS GROUP INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,842,284 shares; 2024Q4: 1,842,284 shares; 2025Q1: 1,842,284 shares 1,842,284$145M9.48%0Timeline
MRKMERCK & CO INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,297,433 shares; 2024Q4: 1,297,433 shares; 2025Q1: 1,245,536 shares 1,245,536$112M7.29%-51,897Timeline
XLKSELECT SECTOR SPDR TRQuarterly 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: 511,482 shares 511,482$106M6.89%newTimeline
RNRRENAISSANCERE HLDGS LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 443,851 shares; 2024Q4: 443,851 shares; 2025Q1: 421,659 shares 421,659$101M6.6%-22,192Timeline
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: 490,272 shares; 2024Q4: 490,272 shares; 2025Q1: 490,272 shares 490,272$93.3M6.08%0Timeline
GEGE AEROSPACEQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 396,579 shares; 2024Q4: 396,579 shares; 2025Q1: 382,754 shares 382,754$76.6M5%-13,825Timeline
GWWWW GRAINGER INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 72,018 shares; 2024Q4: 72,018 shares; 2025Q1: 70,760 shares 70,760$69.9M4.56%-1,258Timeline
XLCSELECT SECTOR SPDR TRQuarterly 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: 34,940 shares; 2025Q1: 714,509 shares 714,509$68.9M4.49%+679,569Timeline
WMTWALMART INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 767,502 shares; 2024Q4: 767,502 shares; 2025Q1: 767,502 shares 767,502$67.4M4.39%0Timeline
XLBSELECT SECTOR SPDR TRQuarterly 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: 35,489 shares; 2025Q1: 730,289 shares 730,289$62.8M4.1%+694,800Timeline
TMTOYOTA MOTOR CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 390,948 shares; 2024Q4: 398,656 shares; 2025Q1: 298,992 shares 298,992$52.8M3.44%-99,664Timeline
INTCINTEL CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 4,398,974 shares; 2024Q4: not reported; 2025Q1: 2,185,098 shares 2,185,098$49.6M3.24%newTimeline
PGPROCTER & GAMBLE COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 280,762 shares; 2024Q4: 280,762 shares; 2025Q1: 280,762 shares 280,762$47.8M3.12%0Timeline
CVSCVS HEALTH CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,131,646 shares; 2024Q4: 1,131,646 shares; 2025Q1: 678,988 shares 678,988$46M3%-452,658Timeline
SHWSHERWIN WILLIAMS COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 253,460 shares; 2024Q4: 253,460 shares; 2025Q1: 112,070 shares 112,070$39.1M2.55%-141,390Timeline
CMCSACOMCAST CORP NEWQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 2,009,847 shares; 2024Q4: 2,009,847 shares; 2025Q1: 1,007,150 shares 1,007,150$37.2M2.42%-1,002,697Timeline
GOOGLALPHABET INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 428,093 shares; 2024Q4: 428,093 shares; 2025Q1: 234,211 shares 234,211$36.2M2.36%-193,882Timeline
RSRELIANCE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 235,075 shares; 2024Q4: 235,075 shares; 2025Q1: 98,231 shares 98,231$28.4M1.85%-136,844Timeline
XLYSELECT SECTOR SPDR TRQuarterly 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: 17,692 shares; 2025Q1: 77,270 shares 77,270$15.3M1%+59,578Timeline
XLVSELECT SECTOR SPDR TRQuarterly 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: 24,429 shares; 2025Q1: 58,591 shares 58,591$8.55M0.56%+34,162Timeline
XLPSELECT SECTOR SPDR TRQuarterly 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: 26,265 shares; 2025Q1: 59,584 shares 59,584$4.87M0.32%+33,319Timeline
XLISELECT SECTOR SPDR TRQuarterly 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: 20,584 shares; 2025Q1: 33,621 shares 33,621$4.41M0.29%+13,037Timeline

Sold out in Q1 2025

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

SecurityShares beforeValue beforeType
VGTVANGUARD WORLD FD272,826$170Mshares
BRK-BBERKSHIRE HATHAWAY INC DEL106,799$48.4Mshares

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 0000904454-25-000270 base2025-05-14acceptance time not in the bulk data set