Skip to main content

Harbor Island Capital LLC

Location
Topsfield, MA
Portfolio Value
Small $375,554,337
Diversification
Diversified
Filing Date
Global Rank
#3,305 / 8,650 ▲ 440
Top Industry
Semiconductor Equipment & Materials 45.9%
3Y Alpha vs SPY
+84.4%
Period ended 54 days ago
Filed Jul 30, 2026 · 24d
26 quarters · since Mar 2020

Clone Performance

Aug 2023–Aug 2026 · vs SPY

Hypothetical growth of buying every stock this filer reported holding, rebalancing on each filing and indexed to the same start. Option positions cannot be bought this way and are left out.

Cloned portfolio
+721.8%
SPY
+72.8%
Annualised alpha
+81.8%
Max drawdown
−30.4%

Estimate. 13F holdings are quarter-lagged, so the clone rebalances about 45 days after each period end — when the filing becomes public — and it excludes option and short positions. Returns use comparable raw closes and exclude dividends; a captured split can shorten the simulated window. It tracks 100% of reported value on average across 13 quarters. Past performance does not predict future results.

Portfolio Concentration

16 tracked positions · as of Jun 30, 2026 · Δ vs Mar 31, 2026
Top Position
17.8%
+2.8 pts
Top 5
58.9%
+6.4 pts
Top 10
82.9%
+1.3 pts
HHI
988
Sep 2023 → Jun 2026 · range 806 – 1,063
Diversified+157

Portfolio Trend

26 quarters · across all stocks

Sector Breakdown

As of Jun 30, 2026
Sector % Portfolio Value
Technology 68.5% $257,107,208
Communication Services 12.3% $46,196,321
Financial Services 7.8% $29,324,423
Consumer Cyclical 4.0% $14,839,123
Industrials 3.9% $14,776,937
Basic Materials 3.5% $13,310,325

Last Quarter's Activity

Export CSV
Jun 30, 2026 vs Mar 31, 2026

Added To

Positions the filer increased
5 positions
Ticker Δ Shares Shares Value Open

Trimmed

Positions the filer reduced
3 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
16 tracked positions · $375,554,337 total · filing declares 16 positions · $375,554,343 · as of Jun 30, 2026
Ticker Company Shares Value (USD) % of Portfolio History

Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.