SRB Corp.
In its 13F for Q1 2025 (holdings as of March 31, 2025, filed May 14, 2025), SRB Corp. reported 23 stock positions worth $1.5 billion. Its top holding was Microsoft (MSFT) at 17.0% of the portfolio, followed by Safety Insurance (SAFT, 9.5%) and Merck (MRK, 7.3%). Compared with Q4 2024, it opened 2 new positions, sold out of 2, added to 6 and reduced 11. The biggest buy was a new position in SS Technology Select Sector (XLK) and the biggest sale an exit from Vanguard Info Tech ETF (VGT).
- Most Recent 13F
- Q2 2026
- Location
- BOSTON, MA
- CIK
- 0001496228
- Portfolio Value
- $1.5B (Q1 2025)
- SEC Filing
- 0000904454-25-000270 ↗ filed May 14, 2025
Holdings Value
Holdings 23 stocks · $1.5B
| MSFT Microsoft Corp. | 16.97% | 693,012 | $260.1M | Reduce -7.4% |
| SAFT Safety Insurance Group Inc. | 9.48% | 1,842,284 | $145.3M | No change |
| MRK Merck & Co. Inc. | 7.29% | 1,245,536 | $111.8M | Reduce -4.0% |
| XLK SS Technology Select Sector | 6.89% | 511,482 | $105.6M | New |
| RNR Renaissancere Holdings Ltd. | 6.60% | 421,659 | $101.2M | Reduce -5.0% |
| AMZN Amazon.com Inc. | 6.08% | 490,272 | $93.3M | No change |
| GE General Electric filed as GE AEROSPACE | 5.00% | 382,754 | $76.6M | Reduce -3.5% |
| GWW WW Grainger Inc. filed as GRAINGER W W INC | 4.56% | 70,760 | $69.9M | Reduce -1.8% |
| XLC SS Comm Select Sector SPDR | 4.49% | 714,509 | $68.9M | Add +1945.0% |
| WMT Walmart Inc. | 4.39% | 767,502 | $67.4M | No change |
| XLB SS Materials Select Sector | 4.10% | 730,289 | $62.8M | Add +1957.8% |
| TM Toyota Motor Corp. -Spon ADR | 3.44% | 298,992 | $52.8M | Reduce -25.0% |
| INTC Intel Corp. | 3.24% | 2,185,098 | $49.6M | New |
| PG The Procter & Gamble Co. | 3.12% | 280,762 | $47.8M | No change |
| CVS CVS Health Corp. | 3.00% | 678,988 | $46.0M | Reduce -40.0% |
| SHW The Sherwin-Williams Co. | 2.55% | 112,070 | $39.1M | Reduce -55.8% |
| CMCSA Comcast Corp. Class A | 2.42% | 1,007,150 | $37.2M | Reduce -49.9% |
| GOOGL Alphabet Inc. Class A | 2.36% | 234,211 | $36.2M | Reduce -45.3% |
| RS Reliance Inc. | 1.85% | 98,231 | $28.4M | Reduce -58.2% |
| XLY SS Consumer Disc Select Sect | 1.00% | 77,270 | $15.3M | Add +336.8% |
| XLV SS Health Care Select Sector | 0.56% | 58,591 | $8.6M | Add +139.8% |
| XLP SS Consumer Staples Sel Sect | 0.32% | 59,584 | $4.9M | Add +126.9% |
| XLI SS Industrial Select Sector | 0.29% | 33,621 | $4.4M | Add +63.3% |
Portfolio Sells Q4 2024 → Q1 2025
| VGT Vanguard Info Tech ETF | Sold out | 0.00% | −9.73 |
| BRK.B Berkshire Hathaway Inc. Class B | Sold out | 0.00% | −2.78 |
| SHW The Sherwin-Williams Co. | Reduce -55.8% | 2.55% | −2.39 |
| GOOGL Alphabet Inc. Class A | Reduce -45.3% | 2.36% | −2.29 |
| CMCSA Comcast Corp. Class A | Reduce -49.9% | 2.42% | −1.90 |
| RS Reliance Inc. | Reduce -58.2% | 1.85% | −1.78 |
| MSFT Microsoft Corp. | Reduce -7.4% | 16.97% | −1.13 |
| TM Toyota Motor Corp. -Spon ADR | Reduce -25.0% | 3.44% | −1.01 |
| MRK Merck & Co. Inc. | Reduce -4.0% | 7.29% | −0.11 |
| CVS CVS Health Corp. | Reduce -40.0% | 3.00% | +0.09 |
| GWW WW Grainger Inc. | Reduce -1.8% | 4.56% | +0.21 |
| RNR Renaissancere Holdings Ltd. | Reduce -5.0% | 6.60% | +0.27 |
| GE General Electric | Reduce -3.5% | 5.00% | +1.20 |
Portfolio Buys Q4 2024 → Q1 2025
| XLK SS Technology Select Sector | New | 6.89% | +6.89 |
| XLC SS Comm Select Sector SPDR | Add +1945.0% | 4.49% | +4.30 |
| XLB SS Materials Select Sector | Add +1957.8% | 4.10% | +3.92 |
| INTC Intel Corp. | New | 3.24% | +3.24 |
| XLY SS Consumer Disc Select Sect | Add +336.8% | 1.00% | +0.77 |
| XLV SS Health Care Select Sector | Add +139.8% | 0.56% | +0.37 |
| XLP SS Consumer Staples Sel Sect | Add +126.9% | 0.32% | +0.20 |
| XLI SS Industrial Select Sector | Add +63.3% | 0.29% | +0.13 |
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 23 | $1.9B | XLK, MSFT, INTC, SAFT, RNR |
| Q1 2026 | 23 | $1.6B | MSFT, SAFT, RNR, XLK, INTC |
| Q4 2025 | 23 | $1.8B | MSFT, SAFT, XLK, RNR, GE |
| Q3 2025 | 23 | $1.7B | MSFT, SAFT, XLK, GE, RNR |
| Q2 2025 | 23 | $1.7B | MSFT, SAFT, AMZN, RNR, GE |
| Q1 2025 | 23 | $1.5B | MSFT, SAFT, MRK, XLK, RNR |
| Q4 2024 | 23 | $1.7B | MSFT, VGT, SAFT, MRK, RNR |
| Q3 2024 | 18 | $1.8B | MSFT, SAFT, MRK, RNR, INTC |
| Q2 2024 | 19 | $1.7B | MSFT, MRK, SAFT, INTC, RNR |
| Q1 2024 | 75 | $1.8B | MSFT, MRK, SAFT, INTC, RNR |