SRB Corp.

In its 13F for Q4 2025 (holdings as of December 31, 2025, filed February 13, 2026), SRB Corp. reported 23 stock positions worth $1.8 billion. Its top holding was Microsoft (MSFT) at 18.4% of the portfolio, followed by Safety Insurance (SAFT, 7.9%) and SS Technology Select Sector (XLK, 6.7%). Compared with Q3 2025, it added to 2. The biggest buy was SS Technology Select Sector (XLK, shares +7%).

Most Recent 13F
Q2 2026
Location
BOSTON, MA
CIK
0001496228
Portfolio Value
$1.8B (Q4 2025)
SEC Filing
0000904454-26-000102 ↗ filed Feb 13, 2026

Holdings Value

0$500.0M$1.0B$1.5B$2.0B Q1 2024: $1.8B Q1 2024 Q2 2024: $1.7B Q2 2024 Q3 2024: $1.8B Q3 2024 Q4 2024: $1.7B Q4 2024 Q1 2025: $1.5B Q1 2025 Q2 2025: $1.7B Q2 2025 Q3 2025: $1.7B Q3 2025 Q4 2025: $1.8B $1.8B Q4 2025 Q1 2026: $1.6B Q1 2026 Q2 2026: $1.9B Q2 2026

Holdings 23 stocks · $1.8B
MSFT Microsoft Corp. 18.39% 692,923 $335.1M No change
SAFT Safety Insurance Group Inc. 7.88% 1,842,284 $143.5M No change
XLK SS Technology Select Sector 6.74% 853,424 $122.9M Add +6.5%
RNR Renaissancere Holdings Ltd. 6.48% 420,089 $118.1M No change
GE General Electric filed as GE AEROSPACE 6.25% 369,895 $113.9M No change
AMZN Amazon.com Inc. 5.83% 460,450 $106.3M No change
XLC SS Comm Select Sector SPDR 5.17% 800,774 $94.3M No change
XLV SS Health Care Select Sector 4.73% 556,818 $86.2M No change
WMT Walmart Inc. 4.45% 727,050 $81.0M No change
INTC Intel Corp. 4.43% 2,185,098 $80.6M No change
XLB SS Materials Select Sector 4.31% 1,729,580 $78.4M No change
GOOGL Alphabet Inc. Class A 4.02% 234,211 $73.3M No change
GWW WW Grainger Inc. 3.78% 68,199 $68.8M No change
TM Toyota Motor Corp. -Spon ADR 3.50% 298,092 $63.8M No change
MRK Merck & Co. Inc. 2.73% 473,365 $49.8M No change
CVS CVS Health Corp. 2.30% 526,855 $41.8M No change
PG The Procter & Gamble Co. 2.09% 265,635 $38.1M No change
SHW The Sherwin-Williams Co. 1.99% 112,070 $36.3M No change
CMCSA Comcast Corp. Class A 1.80% 1,096,685 $32.8M Add +8.9%
RS Reliance Inc. 1.56% 98,231 $28.4M No change
XLY SS Consumer Disc Select Sect 1.01% 154,540 $18.5M No change
XLI SS Industrial Select Sector 0.29% 33,621 $5.2M No change
XLP SS Consumer Staples Sel Sect 0.25% 59,584 $4.6M No change

Portfolio Sells Q3 2025 → Q4 2025
None this quarter.

Portfolio Buys Q3 2025 → Q4 2025
XLK SS Technology Select Sector Add +6.5% 6.74% +0.27
CMCSA Comcast Corp. Class A Add +8.9% 1.80% −0.01

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 23$1.9BXLK, MSFT, INTC, SAFT, RNR
Q1 2026 23$1.6BMSFT, SAFT, RNR, XLK, INTC
Q4 2025 23$1.8BMSFT, SAFT, XLK, RNR, GE
Q3 2025 23$1.7BMSFT, SAFT, XLK, GE, RNR
Q2 2025 23$1.7BMSFT, SAFT, AMZN, RNR, GE
Q1 2025 23$1.5BMSFT, SAFT, MRK, XLK, RNR
Q4 2024 23$1.7BMSFT, VGT, SAFT, MRK, RNR
Q3 2024 18$1.8BMSFT, SAFT, MRK, RNR, INTC
Q2 2024 19$1.7BMSFT, MRK, SAFT, INTC, RNR
Q1 2024 75$1.8BMSFT, MRK, SAFT, INTC, RNR