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SRB CORP

Location
BOSTON, MA
Portfolio Value
Small $307,772,265
Diversification
Diversified
Filing Date
Global Rank
#1,576 / 8,586 ▼ 89
Top Industry
Software - Infrastructure 17.3%
3Y Alpha vs SPY
-4.9%
Period ended 3 months ago
Filed May 14, 2026 · 33d
25 quarters · since Mar 2020

Clone Performance

Jun 2023–Jun 2026 · vs SPY

Hypothetical growth of cloning every reported 13F position and rebalancing on each filing, indexed to the same start.

Cloned portfolio
+57.6%
SPY
+78.1%
Annualised alpha
-4.9%
Max drawdown
−14.5%

Estimate. 13F holdings are quarter-lagged and long-only, so the clone rebalances about 45 days after each period end — when the filing becomes public — and excludes options and short positions. Past performance does not predict future results.

Portfolio Concentration

16 positions · as of Mar 31, 2026 · Δ vs Dec 31, 2025
Top Position
17.3%
−6.5 pts
Top 5
52.6%
−5.4 pts
Top 10
82.0%
−2.0 pts
HHI
850
Jun 2023 → Mar 2026 · range 729 – 1,146
Diversified−193

Portfolio Trend

25 quarters · across all stocks

Sector Breakdown

As of Mar 31, 2026
Sector % Portfolio Value
Technology 25.0% $307,772,265
Financial Services 20.0% $245,831,053
Industrials 12.9% $158,322,167
Consumer Cyclical 12.5% $153,952,040
Consumer Defensive 9.0% $110,769,100
Communication Services 7.9% $97,622,036
Healthcare 7.5% $92,072,183
Basic Materials 5.2% $64,442,667

Last Quarter's Activity

Export CSV
Mar 31, 2026 vs Dec 31, 2025

Added To

Positions the filer increased
No qualifying positions this quarter.

Trimmed

Positions the filer reduced
15 positions
Ticker Δ Shares Shares Value Open

New Positions

Positions the filer opened this quarter
No qualifying positions this quarter.

Sold Out

Positions the filer fully exited
No qualifying positions this quarter.

Portfolio Positions

Export CSV View 13F filing
2 positions · $307,772,265 total · Technology only · as of Mar 31, 2026
Ticker Company Shares Value (USD) % of Portfolio History