CIK: 0001496228
Total reported value
$1.6B
Reporting period: 2026-03-31 · Number of holdings: 44
SRB CORP disclosed 44 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $1.6B and a quarterly turnover rate of 15.1%.
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Srb CORP's disclosed holdings carry a Herfindahl concentration index of 0.062 — mathematically equivalent to about 16 equally-sized positions, well below its 44 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.66), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 68% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
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Trim MSFT
-16.9% -$122.1M
Add INTC
-1.8% $14.1M
Trim GE
-18.6% -$28.5M
Add XLB
0.0% $8.0M
Add GWW
-2.0% $4.1M
Add MRK
-2.1% $5.9M
Showing top 23 holdings (of 44 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | MSFT | Microsoft CORP | Stock-Tech | 13.09% | -5.31% | -16.94% | |
| 2 | SAFT | Safety Insurance Group INC | Stock-Other | 8.01% | +0.13% | -2.59% | |
| 3 | RNR | RenaissanceRe Holdings Ltd. | Stock-Financials | 7.09% | +0.61% | -7.52% | |
| 4 | XLK | Ss Technology Select Sector | ETF-Tech | 6.97% | +0.23% | — | |
| 5 | INTC | Intel CORP | Stock-Tech | 5.82% | +1.39% | -1.77% | |
| 6 | AMZN | Amazon.com INC | Stock-Consumer Disc | 5.76% | -0.07% | -2.18% | |
| 7 | XLC | Ss Comm Select Sector Spdr | ETF-Other | 5.45% | +0.28% | — | |
| 8 | XLB | Ss Materials Select Sector | ETF-Other | 5.31% | +1.00% | — | |
| 9 | GE | General Electric | Stock-Industrials | 5.24% | -1.01% | -18.65% | |
| 10 | XLV | Ss Health Care Select Sector | ETF-Other | 5.01% | +0.28% | — | |
| 11 | WMT | Walmart INC | Stock-Consumer Staples | 4.74% | +0.29% | -14.64% | |
| 12 | GWW | Ww Grainger INC | Stock-Industrials | 4.48% | +0.70% | -1.96% | |
| 13 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 4.06% | +0.04% | -1.80% | |
| 14 | TM | Toyota Motor CORP -spon Adr | Stock-Consumer Disc | 3.69% | +0.19% | -2.11% | |
| 15 | MRK | Merck & Co. INC. | Stock-Healthcare | 3.42% | +0.68% | -2.13% | |
| 16 | CVS | Cvs Health CORP | Stock-Healthcare | 2.23% | -0.07% | -3.96% | |
| 17 | SHW | Sherwin-williams Co/the | Stock-Materials | 2.17% | +0.18% | -1.81% | |
| 18 | PG | Procter & Gamble Co/the | Stock-Consumer Staples | 2.07% | -0.02% | -12.31% | |
| 19 | CMCSA | Comcast Corp-class A | Stock-Comm Services | 1.93% | +0.13% | — | |
| 20 | RS | Reliance INC | Stock-Materials | 1.79% | +0.23% | -2.30% | |
| 21 | XLY | Ss Consumer Disc Select Sect | ETF-Other | 1.03% | +0.02% | — | |
| 22 | XLI | Ss Industrial Select Sector | ETF-Other | 0.33% | +0.04% | — | |
| 23 | XLP | Ss Consumer Staples Sel Sect | ETF-Other | 0.30% | +0.05% | — |
Performance for Q3 2026
+0.4%
Performance Last 4 Quarters
+34.7%
Based on 74% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 44 | $1.6B | 15 | |
| 2025-12-31 | 44 | $1.8B | 8 | |
| 2025-09-30 | 44 | $1.7B | 26 | |
| 2025-06-30 | 44 | $1.7B | 0 | |
| 2025-03-31 | 43 | $1.5B | 100 | |
| 2024-12-31 | 40 | $1.7B | 0 | |
| 2024-09-30 | 36 | $1.8B | 0 | |
| 2024-06-30 | 38 | $1.7B | 0 | |
| 2024-03-31 | 149 | $1.8B | 0 | |
| 2023-12-31 | 179 | $1.7B | 0 | |
| 2023-09-30 | 188 | $1.7B | 0 | |
| 2023-06-30 | 192 | $1.7B | 0 | |
| 2023-03-31 | 226 | $1.6B | 0 | |
| 2022-12-31 | 187 | $1.6B | 0 | |
| 2022-09-30 | 194 | $1.4B | 0 | |
| 2022-06-30 | 213 | $1.5B | 0 | |
| 2022-03-31 | 233 | $1.8B | 0 | |
| 2021-12-31 | 235 | $1.9B | 0 | |
| 2021-09-30 | 191 | $1.7B | 0 | |
| 2021-06-30 | 161 | $1.5B | 100 | |
| 2021-03-31 | 179 | $1.5B | 25 | |
| 2020-12-31 | 315 | $1.4B | 48 | |
| 2020-09-30 | 288 | $1.2B | 13 | |
| 2020-06-30 | 284 | $1.2B | 18 | |
| 2020-03-31 | 336 | $1.1B | 17 | |
| 2019-12-31 | 291 | $1.2B | 14 | |
| 2019-09-30 | 317 | $1.1B | 12 | |
| 2019-06-30 | 335 | $1.1B | 14 | |
| 2019-03-31 | 237 | $1.1B | 18 | |
| 2018-12-31 | 293 | $943.5M | 20 | |
| 2018-09-30 | 329 | $1.0B | 13 | |
| 2018-06-30 | 339 | $911.7M | 21 | |
| 2018-03-31 | 177 | $790.8M | 16 | |
| 2017-12-31 | 186 | $778.4M | 21 | |
| 2017-09-30 | 190 | $757.2M | 13 | |
| 2017-06-30 | 184 | $697.5M | 9 | |
| 2017-03-31 | 184 | $705.3M | 9 | |
| 2016-12-31 | 182 | $720.6M | 8 | |
| 2016-09-30 | 186 | $684.5M | 9 | |
| 2016-06-30 | 194 | $653.1M | 11 | |
| 2016-03-31 | 185 | $635.1M | 7 | |
| 2015-12-31 | 157 | $616.3M | 21 | |
| 2015-09-30 | 176 | $728.2M | 8 | |
| 2015-06-30 | 198 | $754.7M | 10 | |
| 2015-03-31 | 178 | $714.4M | 14 | |
| 2014-12-31 | 196 | $703.1M | 16 | |
| 2014-09-30 | 200 | $688.9M | 10 | |
| 2014-06-30 | 25 | $626.7M | 8 | |
| 2014-03-31 | 25 | $610.4M | 37 | |
| 2013-12-31 | 20 | $438.1M | 10 | |
| 2013-09-30 | 21 | $434.6M | 5 | |
| 2013-06-30 | 21 | $432.9M | — |
Srb CORP's most significant position changes for 2026-03-31: Trim: Microsoft CORP (MSFT) — shares -16.94%; Trim: Intel CORP (INTC) — shares -1.77%; Trim: General Electric (GE) — shares -18.65%; Trim: Ww Grainger INC (GWW) — shares -1.96%; Trim: Merck & Co. INC. (MRK) — shares -2.13%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | INTC | Intel CORP | +1.4% | -1.77% | Trim |
| 2 | XLB | Ss Materials Select Sector | +1% | — | Unchanged |
| 3 | GWW | Ww Grainger INC | +0.7% | -1.96% | Trim |
| 4 | MRK | Merck & Co. INC. | +0.7% | -2.13% | Trim |
| 5 | RNR | RenaissanceRe Holdings Ltd. | +0.6% | -7.52% | Trim |
| 6 | WMT | Walmart INC | +0.3% | -14.64% | Trim |
| 7 | XLC | Ss Comm Select Sector Spdr | +0.3% | — | Unchanged |
| 8 | XLV | Ss Health Care Select Sector | +0.3% | — | Unchanged |
| 9 | XLK | Ss Technology Select Sector | +0.2% | — | Unchanged |
| 10 | RS | Reliance INC | +0.2% | -2.30% | Trim |
| 11 | TM | Toyota Motor CORP -spon Adr | +0.2% | -2.11% | Trim |
| 12 | SHW | Sherwin-williams Co/the | +0.2% | -1.81% | Trim |
| 13 | SAFT | Safety Insurance Group INC | +0.1% | -2.59% | Trim |
| 14 | CMCSA | Comcast Corp-class A | +0.1% | — | Unchanged |
| 15 | XLP | Ss Consumer Staples Sel Sect | +0.1% | — | Unchanged |
| 16 | GOOGL | Alphabet Inc-cl A | 0% | -1.80% | Trim |
| 17 | XLI | Ss Industrial Select Sector | 0% | — | Unchanged |
| 18 | XLY | Ss Consumer Disc Select Sect | 0% | — | Unchanged |
| 19 | PG | Procter & Gamble Co/the | 0% | -12.31% | Trim |
| 20 | AMZN | Amazon.com INC | -0.1% | -2.18% | Trim |
| 21 | CVS | Cvs Health CORP | -0.1% | -3.96% | Trim |
| 22 | GE | General Electric | -1% | -18.65% | Trim |
| 23 | MSFT | Microsoft CORP | -5.3% | -16.94% | Trim |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-14 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-02-13 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-11-14 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-08-14 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-14 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-14 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-14 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-14 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-14 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-14 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-14 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-14 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-15 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-14 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-14 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-12 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-13 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-14 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-12 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-13 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-14 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-12 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-13 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-14 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-05-14 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-02-14 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-11-14 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-08-14 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-05-14 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-02-14 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-11-14 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-08-14 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-05-14 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-02-14 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-11-14 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-08-14 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-05-15 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-02-15 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-11-15 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-08-15 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-05-13 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-12 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-11-13 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-08-14 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-08-14 | Amendment | View on EDGAR |
| 2015-03-31 | 2015-05-15 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-02-17 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-11-14 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-08-14 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-05-14 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-02-14 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-11-14 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-08-14 | 13F-HR | View on EDGAR |
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