Harbor Island Capital LLC
Registered adviserRegulatory profile
From Form ADV, the SEC filer profile, 13D/13G type codes and N-CEN, never from the name.
| Rosters | Regulatory AUM | Main clients |
|---|---|---|
| Apr 2026 to Nov 2026 | $277,626,655 | Individuals and high net worth (93%) |
| Mar 2025 to Mar 2026 | $226,903,079 | Individuals and high net worth (93%) |
| Apr 2024 to Feb 2025 | $207,725,809 | Individuals and high net worth (93%) |
| May 2023 to Mar 2024 | $165,698,622 | Individuals and high net worth (93%) |
| Apr 2023 | $165,698,622 | Individuals and high net worth (93%) |
| Apr 2022 to Mar 2023 | $234,681,885 | Individuals and high net worth (93%) |
Portfolio style
Measured from the filed 13F common-share book for Jun 30, 2026, the newest measured quarter, never from the firm's own description.
Closest benchmark: the Nasdaq-100 as of 2026-06-30, active share 77.6%; sector active share 46.1% against the combined 13F book's sector weights.
Over time 26 measured quarters
How the bands are measured
Style bands measure the filed 13F common-share book each closed quarter, tested in this order. Unknown: under $10,000,000 of valued equity or 5 stocks. Index-like (100+ stocks): active share of 20% or less against the closest benchmark, which is the S&P 500, S&P MidCap 400, S&P SmallCap 600, Russell 1000, Russell 2000, Nasdaq-100 or Dow Jones Industrial Average (weighted by an index-tracking fund's reported holdings or the index's constituents nearest the quarter end, over the names resolved to companies, and only when those are 90%+ of its weight) or every 13F filer's combined book, or index series holding 80%+ of the registered fund assets it advises (N-CEN) and equal to 50%+ of its book. Systematic-like: 500+ stocks, 100%+ annual turnover and a top 10 weight of 25% or less. Concentrated: a top 10 weight of 60%+ or 12 or fewer effective positions. Diversified active: none of these. Turnover is the smaller of buys and sells over average equity value, summed over four quarters: low under 30%, high 100%+. Horizon is the value-weighted number of quarters each position has been held: short under 4, long 12+.
Clone Performance
Build a hypothetical price-return history from this filer's public 13F holdings.
View clone backtestPortfolio Concentration
16 tracked positions · as of Sep 30, 2026 · Δ vs Jun 30, 2026Portfolio Trend
Sector Breakdown
As of Sep 30, 2026| Sector | % Portfolio | Value |
|---|---|---|
| Technology | 66.1% | $182,764,296 |
| Communication Services | 12.6% | $34,861,346 |
| Financial Services | 9.1% | $25,124,159 |
| Consumer Cyclical | 4.6% | $12,717,804 |
| Industrials | 4.2% | $11,732,740 |
| Basic Materials | 3.3% | $9,257,483 |
Last Quarter's Activity
Export CSVAdded To
Positions the filer increasedTrimmed
Positions the filer reduced| Ticker | Company | Δ Shares | Shares | Value | Open |
|---|---|---|---|---|---|
| — | −309,380 | 618,510 | $19,142,884 | ||
| CMCSA | Comcast Corp | −108,501 | 441,030 | $9,596,812 | |
| HPQ | Hp Inc | −43,060 | 252,346 | $7,893,382 | |
| WFC | Wells Fargo & Company | −34,514 | 219,678 | $17,585,223 | |
| CSCO | Cisco Systems, Inc. | −32,322 | 173,629 | $18,687,689 | |
| VSNT | Versant Media Group, Inc. | −28,154 | 193,112 | $6,121,650 | |
| INTC | Intel Corp | −24,406 | 90,645 | $10,898,248 | |
| KLAC | Kla Corp | −21,134 | 114,826 | $22,383,032 | |
| LRCX | Lam Research Corp | −20,697 | 128,181 | $42,108,740 | |
| GATX | Gatx Corp | −14,388 | 69,008 | $11,732,740 | |
| AMAT | Applied Materials Inc | −12,329 | 80,169 | $40,996,823 | |
| AAPL | Apple Inc. | −11,212 | 67,349 | $22,428,563 | |
| BAC | Bank Of America Corp | −7,474 | 138,507 | $7,538,936 | |
| MSFT | Microsoft Corp | −6,962 | 33,862 | $17,367,819 | |
| EXP | Eagle Materials Inc | −5,026 | 54,131 | $9,257,483 | |
| NKE | NIKE, Inc. | −2,229 | 359,260 | $12,717,804 | |
| No positions match the current search. | |||||
New Positions
Positions the filer opened this quarterSold Out
Positions the filer fully exited| Ticker | Company | Type | Shares | Value (USD) | % of Portfolio | History |
|---|---|---|---|---|---|---|
| LRCX |
Lam Research Corp
Technology
|
Reduced | 128,181 | $42,108,740 | 15.23% | |
| AMAT |
Applied Materials Inc
Technology
|
Reduced | 80,169 | $40,996,823 | 14.83% | |
| AAPL |
Apple Inc.
Technology
|
Reduced | 67,349 | $22,428,563 | 8.11% | |
| KLAC |
Kla Corp
Technology
|
Reduced | 114,826 | $22,383,032 | 8.10% | |
|
|
Reduced | 618,510 | $19,142,884 | 6.92% | ||
| CSCO |
Cisco Systems, Inc.
Technology
|
Reduced | 173,629 | $18,687,689 | 6.76% | |
| WFC |
Wells Fargo & Company
Financial Services
|
Reduced | 219,678 | $17,585,223 | 6.36% | |
| MSFT |
Microsoft Corp
Technology
|
Reduced | 33,862 | $17,367,819 | 6.28% | |
| NKE |
NIKE, Inc.
Consumer Cyclical
|
Reduced | 359,260 | $12,717,804 | 4.60% | |
| GATX |
Gatx Corp
Industrials
|
Reduced | 69,008 | $11,732,740 | 4.24% | |
| INTC |
Intel Corp
Technology
|
Reduced | 90,645 | $10,898,248 | 3.94% | |
| CMCSA |
Comcast Corp
Communication Services
|
Reduced | 441,030 | $9,596,812 | 3.47% | |
| EXP |
Eagle Materials Inc
Basic Materials
|
Reduced | 54,131 | $9,257,483 | 3.35% | |
| HPQ |
Hp Inc
Technology
|
Reduced | 252,346 | $7,893,382 | 2.86% | |
| BAC |
Bank Of America Corp
Financial Services
|
Reduced | 138,507 | $7,538,936 | 2.73% | |
| VSNT |
Versant Media Group, Inc.
Communication Services
|
Reduced | 193,112 | $6,121,650 | 2.21% |
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.