Basic Stats
Insider Profile SRB Corp
Portfolio Value $ 1,666,796,524
Current Positions 23
Latest Holdings, Performance, AUM (from 13F, 13D)

SRB Corp has disclosed 23 total holdings in their latest SEC filings. Most recent portfolio value is calculated to be $ 1,666,796,524 USD. Actual Assets Under Management (AUM) is this value plus cash (which is not disclosed). SRB Corp’s top holdings are Microsoft Corporation (US:MSFT) , Safety Insurance Group, Inc. (US:SAFT) , Amazon.com, Inc. (US:AMZN) , RenaissanceRe Holdings Ltd. (US:RNR) , and General Electric Company (US:GE) .

SRB Corp - Portfolio Value
Add This Fund
to your Dashboard
Top Increases This Quarter

We use the change in the portfolio allocation because this is the most meaningful metric. Changes can be due to trades or changes in share prices.

Security Shares
(MM)		 Value
(MM$)		 Portfolio % ΔPortfolio %
0.56 75.05 3.0757 2.5177
Top Decreases This Quarter

We use the change in the portfolio allocation because this is the most meaningful metric. Changes can be due to trades or changes in share prices.

Security Shares
(MM)		 Value
(MM$)		 Portfolio % ΔPortfolio %
0.50 39.31 1.6108 -5.6813
0.32 82.09 3.3642 -3.5243
1.84 146.26 5.9936 -3.4847
0.69 344.67 14.1243 -2.8438
0.42 102.42 4.1972 -2.4034
0.49 107.56 4.4078 -1.6763
0.07 73.61 3.0164 -1.5427
0.30 51.50 2.1106 -1.3320
0.77 75.05 3.0754 -1.3194
0.60 41.13 1.6853 -1.3151
13F and Fund Filings

This form was filed on 2025-08-14 for the reporting period 2025-06-30. Click the link icon to see the full transaction history.

Upgrade to unlock premium data and export to Excel .

2022-07-28: Important Note - We have changed the treatment of the Δ Portfolio % column in this table. Previously, we were reporting it as the percent change in the portfolio allocation. We are now reporting it as the raw change in the portfolio allocation (still reported as a percent). In formula terms, we were previously reporting it as 100 * (current allocation - prior allocation ) / prior allocation. We are now reporting it as (current allocation - prior allocation).
Security Type Avg Share Price Shares
(MM)		 ΔShares
(%)		 ΔShares
(%)		 Value
($MM)		 Portfolio
(%)		 ΔPortfolio
(%)
MSFT / Microsoft Corporation 0.69 -0.01 344.67 32.49 14.1243 -2.8438
SAFT / Safety Insurance Group, Inc. 1.84 0.00 146.26 0.65 5.9936 -3.4847
AMZN / Amazon.com, Inc. 0.49 0.00 107.56 15.31 4.4078 -1.6763
RNR / RenaissanceRe Holdings Ltd. 0.42 0.00 102.42 1.21 4.1972 -2.4034
GE / General Electric Company 0.38 0.00 98.52 28.60 4.0372 -0.9595
XLC / The Select Sector SPDR Trust - The Communication Services Select Sector SPDR Fund 0.80 12.07 86.91 26.11 3.5615 -0.9334
XLK / The Select Sector SPDR Trust - The Technology Select Sector SPDR Fund 0.32 -36.62 82.09 -22.27 3.3642 -3.5243
XLB / The Select Sector SPDR Trust - The Materials Select Sector SPDR Fund 0.86 18.42 75.94 20.94 3.1119 -0.9836
XLV / The Select Sector SPDR Trust - The Health Care Select Sector SPDR Fund 0.56 850.35 75.05 777.40 3.0757 2.5177
WMT / Walmart Inc. 0.77 0.00 75.05 11.38 3.0754 -1.3194
GWW / W.W. Grainger, Inc. 0.07 0.00 73.61 5.31 3.0164 -1.5427
TM / Toyota Motor Corporation - Depositary Receipt (Common Stock) 0.30 0.00 51.50 -2.42 2.1106 -1.3320
INTC / Intel Corporation 2.19 0.00 48.95 -1.36 2.0058 -1.2309
PG / The Procter & Gamble Company 0.28 0.00 44.73 -6.51 1.8331 -1.2878
GOOGL / Alphabet Inc. 0.23 0.00 41.28 13.96 1.6914 -0.6709
CVS / CVS Health Corporation 0.60 -12.19 41.13 -10.60 1.6853 -1.3151
MRK / Merck & Co., Inc. 0.50 -60.13 39.31 -64.84 1.6108 -5.6813
SHW / The Sherwin-Williams Company 0.11 0.00 38.48 -1.67 1.5769 -0.9756
CMCSA / Comcast Corporation 1.01 0.00 35.95 -3.28 1.4730 -0.9510
RS / Reliance, Inc. 0.10 0.00 30.83 8.71 1.2636 -0.5864
XLY / The Select Sector SPDR Trust - The Consumer Discretionary Select Sector SPDR Fund 0.08 0.00 16.79 10.07 0.6882 -0.3070
XLI / The Select Sector SPDR Trust - The Industrial Select Sector SPDR Fund 0.03 0.00 4.96 12.55 0.2032 -0.0842
XLP / The Select Sector SPDR Trust - The Consumer Staples Select Sector SPDR Fund 0.06 0.00 4.82 -0.86 0.1977 -0.1197