Harbor Island Capital LLC
Long book
$269.2M
Q1 2026
Positions
16
Top-10 weight
82%
concentration
Last quarter
+32.6%
SPY +14.8%
Turnover
6%
of book per quarter
Strategy in plain words
auto-generated from filingsHarbor Island Capital LLC is a concentrated fundamental stock-picker, running a $269.2M US long book across 16 positions.
The portfolio is extremely concentrated — the top 10 positions are almost the whole book. The book barely moves quarter to quarter — a patient, low-turnover holder. Current anchor positions: APPLIED MATERIALS INC, LAM RESEARCH CORP, WARNER BROS DISCOVERY INC, WELLS FARGO & CO, KLA CORP.
Over the last 9 quarters its long book ran on average 3.8pp per quarter ahead of the S&P 500, beating the index in 6 of 9 quarters. We rate its filings highest-signal: new buys here are worth attention.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
+5.7%
Q2 2024
-4.9%
Q3 2024
-1.8%
Q4 2024
-4.5%
Q1 2025
+13.8%
Q2 2025
+17.3%
Q3 2025
+12.2%
Q4 2025
+3.8%
Q1 2026
+32.6%
Sector allocation
Technology 38%
Industrials 22%
Communications 18%
Other 12%
Financials 10%
Long book by quarter
What does Harbor Island own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| AMAT APPLIED MATERIALS INC | Technology | 118.1K | $40.4M | 15.0% | -8.9% |
| LRCX LAM RESEARCH CORP | Industrials | 159.8K | $34.1M | 12.7% | -20.5% |
| WBD WARNER BROS DISCOVERY INC | Communications | 971.3K | $26.7M | 9.9% | -1.0% |
| WFC WELLS FARGO & CO | Financials | 254.2K | $20.2M | 7.5% | Held |
| KLAC KLA CORP | Other | 13.6K | $20.0M | 7.4% | Held |
| AAPL APPLE INC | Technology | 78.6K | $19.9M | 7.4% | Held |
| CSCO CISCO SYSTEMS INC | Technology | 206.0K | $16.0M | 5.9% | Held |
| MSFT MICROSOFT CORP | Technology | 38.5K | $14.3M | 5.3% | Held |
| GATX GATX CORP | Industrials | 83.4K | $14.2M | 5.3% | Held |
| CMCSA COMCAST CORP-CLASS A | Communications | 480.4K | $13.8M | 5.1% | Held |
| NKE NIKE INC -CL B | Other | 242.9K | $12.8M | 4.8% | +23.4% |
| EXP EAGLE MATERIALS INC | Industrials | 59.2K | $11.2M | 4.2% | +37.8% |
| VSNT VERSANT MEDIA GROUP INC | Communications | 206.4K | $7.6M | 2.8% | New |
| BAC BANK OF AMERICA CORP | Financials | 146.0K | $7.1M | 2.6% | Held |
| HPQ HP INC | Technology | 295.4K | $5.7M | 2.1% | Held |
| INTC INTEL CORP | Technology | 115.1K | $5.1M | 1.9% | Held |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 12, 2026 | 16 | $269.2M | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Jan 23, 2026 | 15 | $260.8M | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Oct 22, 2025 | 15 | $233.7M | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 7, 2025 | 15 | $213.1M | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 9, 2025 | 15 | $209.0M | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Jan 27, 2025 | 15 | $209.0M | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Oct 17, 2024 | 15 | $211.4M | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Jul 25, 2024 | 15 | $232.2M | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | Apr 18, 2024 | 15 | $218.3M | canonical | SEC ↗ |
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