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SRB CORP

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13F filer, CIK 1496228, BOSTON, MA

SRB CORP reported $1,821,787,217 across 23 holdings for the quarter ended 2025-12-31, in a 13F-HR filed 2026-02-13. Its ten largest share positions make up 70.37% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0000904454-26-000102

Period
2025-12-31
Reported value
$1.82B
Holdings
23
Top 10 weight
70.37%
New
0
Sold out
0

Part of the filer group SRB CORP

How groups are built

Largest buys vs the previous quarter

SecurityShares changeApprox. value
XLKadded+452,800$65.2M
XLBadded+864,790$39.2M
XLYadded+77,270$9.23M
CMCSAadded+89,535$2.68M

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

None.

Holdings, Q4 2025

Share positions as resolved from 13F-HR 0000904454-26-000102, largest first. % of portfolio is the value over $1,821,787,217, 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; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 748,727 shares; 2024Q4: 748,727 shares; 2025Q1: 693,012 shares; 2025Q2: 692,923 shares; 2025Q3: 692,923 shares; 2025Q4: 692,923 shares 692,923$335M18.39%0Timeline
SAFTSAFETY INS GROUP INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,842,284 shares; 2024Q4: 1,842,284 shares; 2025Q1: 1,842,284 shares; 2025Q2: 1,842,284 shares; 2025Q3: 1,842,284 shares; 2025Q4: 1,842,284 shares 1,842,284$144M7.88%0Timeline
XLKSELECT SECTOR SPDR TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 511,482 shares; 2025Q2: 324,185 shares; 2025Q3: 400,624 shares; 2025Q4: 853,424 shares 853,424$123M6.74%+452,800Timeline
RNRRENAISSANCERE HLDGS LTDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 443,851 shares; 2024Q4: 443,851 shares; 2025Q1: 421,659 shares; 2025Q2: 421,659 shares; 2025Q3: 420,089 shares; 2025Q4: 420,089 shares 420,089$118M6.48%0Timeline
GEGE AEROSPACEQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 396,579 shares; 2024Q4: 396,579 shares; 2025Q1: 382,754 shares; 2025Q2: 382,754 shares; 2025Q3: 369,895 shares; 2025Q4: 369,895 shares 369,895$114M6.25%0Timeline
AMZNAMAZON COM INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 490,272 shares; 2024Q4: 490,272 shares; 2025Q1: 490,272 shares; 2025Q2: 490,272 shares; 2025Q3: 460,450 shares; 2025Q4: 460,450 shares 460,450$106M5.83%0Timeline
XLCSELECT SECTOR SPDR TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 34,940 shares; 2025Q1: 714,509 shares; 2025Q2: 800,774 shares; 2025Q3: 800,774 shares; 2025Q4: 800,774 shares 800,774$94.3M5.17%0Timeline
XLVSELECT SECTOR SPDR TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 24,429 shares; 2025Q1: 58,591 shares; 2025Q2: 556,818 shares; 2025Q3: 556,818 shares; 2025Q4: 556,818 shares 556,818$86.2M4.73%0Timeline
WMTWALMART INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 767,502 shares; 2024Q4: 767,502 shares; 2025Q1: 767,502 shares; 2025Q2: 767,502 shares; 2025Q3: 727,050 shares; 2025Q4: 727,050 shares 727,050$81M4.45%0Timeline
INTCINTEL CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 4,398,974 shares; 2024Q4: not reported; 2025Q1: 2,185,098 shares; 2025Q2: 2,185,098 shares; 2025Q3: 2,185,098 shares; 2025Q4: 2,185,098 shares 2,185,098$80.6M4.43%0Timeline
XLBSELECT SECTOR SPDR TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 35,489 shares; 2025Q1: 730,289 shares; 2025Q2: 864,790 shares; 2025Q3: 864,790 shares; 2025Q4: 1,729,580 shares 1,729,580$78.4M4.31%+864,790Timeline
GOOGLALPHABET INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 428,093 shares; 2024Q4: 428,093 shares; 2025Q1: 234,211 shares; 2025Q2: 234,211 shares; 2025Q3: 234,211 shares; 2025Q4: 234,211 shares 234,211$73.3M4.02%0Timeline
GWWWW GRAINGER INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 72,018 shares; 2024Q4: 72,018 shares; 2025Q1: 70,760 shares; 2025Q2: 70,760 shares; 2025Q3: 68,199 shares; 2025Q4: 68,199 shares 68,199$68.8M3.78%0Timeline
TMTOYOTA MOTOR CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 390,948 shares; 2024Q4: 398,656 shares; 2025Q1: 298,992 shares; 2025Q2: 298,992 shares; 2025Q3: 298,092 shares; 2025Q4: 298,092 shares 298,092$63.8M3.5%0Timeline
MRKMERCK & CO INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,297,433 shares; 2024Q4: 1,297,433 shares; 2025Q1: 1,245,536 shares; 2025Q2: 496,546 shares; 2025Q3: 473,365 shares; 2025Q4: 473,365 shares 473,365$49.8M2.74%0Timeline
CVSCVS HEALTH CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,131,646 shares; 2024Q4: 1,131,646 shares; 2025Q1: 678,988 shares; 2025Q2: 596,193 shares; 2025Q3: 526,855 shares; 2025Q4: 526,855 shares 526,855$41.8M2.3%0Timeline
PGPROCTER & GAMBLE COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 280,762 shares; 2024Q4: 280,762 shares; 2025Q1: 280,762 shares; 2025Q2: 280,762 shares; 2025Q3: 265,635 shares; 2025Q4: 265,635 shares 265,635$38.1M2.09%0Timeline
SHWSHERWIN WILLIAMS COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 253,460 shares; 2024Q4: 253,460 shares; 2025Q1: 112,070 shares; 2025Q2: 112,070 shares; 2025Q3: 112,070 shares; 2025Q4: 112,070 shares 112,070$36.3M1.99%0Timeline
CMCSACOMCAST CORP NEWQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 2,009,847 shares; 2024Q4: 2,009,847 shares; 2025Q1: 1,007,150 shares; 2025Q2: 1,007,150 shares; 2025Q3: 1,007,150 shares; 2025Q4: 1,096,685 shares 1,096,685$32.8M1.8%+89,535Timeline
RSRELIANCE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 235,075 shares; 2024Q4: 235,075 shares; 2025Q1: 98,231 shares; 2025Q2: 98,231 shares; 2025Q3: 98,231 shares; 2025Q4: 98,231 shares 98,231$28.4M1.56%0Timeline
XLYSELECT SECTOR SPDR TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 17,692 shares; 2025Q1: 77,270 shares; 2025Q2: 77,270 shares; 2025Q3: 77,270 shares; 2025Q4: 154,540 shares 154,540$18.5M1.01%+77,270Timeline
XLISELECT SECTOR SPDR TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 20,584 shares; 2025Q1: 33,621 shares; 2025Q2: 33,621 shares; 2025Q3: 33,621 shares; 2025Q4: 33,621 shares 33,621$5.22M0.29%0Timeline
XLPSELECT SECTOR SPDR TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 26,265 shares; 2025Q1: 59,584 shares; 2025Q2: 59,584 shares; 2025Q3: 59,584 shares; 2025Q4: 59,584 shares 59,584$4.63M0.25%0Timeline

How Q4 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 0000904454-26-000102 base2026-02-13acceptance time not in the bulk data set