SRB Corp.
In its 13F for Q1 2026 (holdings as of March 31, 2026, filed May 14, 2026), SRB Corp. reported 23 stock positions worth $1.6 billion. Its top holding was Microsoft (MSFT) at 13.1% of the portfolio, followed by Safety Insurance (SAFT, 8.0%) and Renaissancere (RNR, 7.1%). Compared with Q4 2025, it reduced 15. The biggest sale was Microsoft (MSFT, shares −17%).
- Most Recent 13F
- Q2 2026
- Location
- BOSTON, MA
- CIK
- 0001496228
- Portfolio Value
- $1.6B (Q1 2026)
- SEC Filing
- 0000904454-26-000289 ↗ filed May 14, 2026
Holdings Value
Holdings 23 stocks · $1.6B
| MSFT Microsoft Corp. | 13.09% | 575,549 | $213.1M | Reduce -16.9% |
| SAFT Safety Insurance Group Inc. | 8.01% | 1,794,655 | $130.4M | Reduce -2.6% |
| RNR Renaissancere Holdings Ltd. | 7.09% | 388,478 | $115.5M | Reduce -7.5% |
| XLK SS Technology Select Sector | 6.97% | 853,424 | $113.4M | No change |
| INTC Intel Corp. | 5.82% | 2,146,415 | $94.7M | Reduce -1.8% |
| AMZN Amazon.com Inc. | 5.76% | 450,434 | $93.8M | Reduce -2.2% |
| XLC SS Comm Select Sector SPDR | 5.45% | 800,774 | $88.8M | No change |
| XLB SS Materials Select Sector | 5.31% | 1,729,580 | $86.4M | No change |
| GE General Electric filed as GE AEROSPACE | 5.24% | 300,911 | $85.4M | Reduce -18.6% |
| XLV SS Health Care Select Sector | 5.01% | 556,818 | $81.6M | No change |
| WMT Walmart Inc. | 4.74% | 620,579 | $77.1M | Reduce -14.6% |
| GWW WW Grainger Inc. | 4.48% | 66,861 | $72.9M | Reduce -2.0% |
| GOOGL Alphabet Inc. Class A | 4.06% | 229,991 | $66.1M | Reduce -1.8% |
| TM Toyota Motor Corp. -Spon ADR | 3.69% | 291,815 | $60.1M | Reduce -2.1% |
| MRK Merck & Co. Inc. | 3.42% | 463,298 | $55.7M | Reduce -2.1% |
| CVS CVS Health Corp. | 2.23% | 506,016 | $36.3M | Reduce -4.0% |
| SHW The Sherwin-Williams Co. | 2.17% | 110,041 | $35.3M | Reduce -1.8% |
| PG The Procter & Gamble Co. | 2.07% | 232,924 | $33.6M | Reduce -12.3% |
| CMCSA Comcast Corp. Class A | 1.93% | 1,096,685 | $31.5M | No change |
| RS Reliance Inc. | 1.79% | 95,976 | $29.2M | Reduce -2.3% |
| XLY SS Consumer Disc Select Sect | 1.03% | 154,540 | $16.8M | No change |
| XLI SS Industrial Select Sector | 0.33% | 33,621 | $5.4M | No change |
| XLP SS Consumer Staples Sel Sect | 0.30% | 59,584 | $4.9M | No change |
Portfolio Sells Q4 2025 → Q1 2026
| MSFT Microsoft Corp. | Reduce -16.9% | 13.09% | −5.31 |
| GE General Electric | Reduce -18.6% | 5.24% | −1.01 |
| AMZN Amazon.com Inc. | Reduce -2.2% | 5.76% | −0.07 |
| CVS CVS Health Corp. | Reduce -4.0% | 2.23% | −0.06 |
| PG The Procter & Gamble Co. | Reduce -12.3% | 2.07% | −0.02 |
| GOOGL Alphabet Inc. Class A | Reduce -1.8% | 4.06% | +0.04 |
| SAFT Safety Insurance Group Inc. | Reduce -2.6% | 8.01% | +0.13 |
| SHW The Sherwin-Williams Co. | Reduce -1.8% | 2.17% | +0.17 |
| TM Toyota Motor Corp. -Spon ADR | Reduce -2.1% | 3.69% | +0.19 |
| RS Reliance Inc. | Reduce -2.3% | 1.79% | +0.23 |
| WMT Walmart Inc. | Reduce -14.6% | 4.74% | +0.29 |
| RNR Renaissancere Holdings Ltd. | Reduce -7.5% | 7.09% | +0.61 |
| MRK Merck & Co. Inc. | Reduce -2.1% | 3.42% | +0.69 |
| GWW WW Grainger Inc. | Reduce -2.0% | 4.48% | +0.70 |
| INTC Intel Corp. | Reduce -1.8% | 5.82% | +1.39 |
Portfolio Buys Q4 2025 → Q1 2026
| None this quarter. | |||
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 |