Harbor Island Capital LLC holds a focused book of 16 stocks worth $375.6M as of Q2 2026 (disclosed Jul 30, 2026, a ~30-day 13F lag). This quarter they opened Lam Research Corp and trimmed Applied Materials Inc. Their largest long position is Applied Materials Inc at 18% of the equity book.
Top-heavy: focused book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
100% mapped to company sectors
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices (an exit at the prior quarter-end), no cost basis
Other tracked managers holding the same core names as Harbor Island Capital LLC
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| GLP Holdings LLLP | 3 / 16 | $110.6M |
| Daily Journal Corp | 2 / 16 | $230.7M |
| Uhlmann Price Securities, LLC | 9 / 16 | $2.4B |
| Oaktop Capital Management II, L.P. | 3 / 16 | $1.8B |
| Hoffman, Alan N Investment Management | 2 / 16 | $106.2M |
| Independent Investors Inc | 5 / 16 | $321.5M |
| 9823 Capital, L.P. | 2 / 16 | $90.7M |
| Prospect Hill Management, LLC | 2 / 16 | $151.6M |
Ranked by the share of each fund's own book sitting in the names it shares with Harbor Island Capital LLC: only funds sharing at least a tenth of the book qualify. Index giants, bank custody books and market makers are excluded. They hold everything, so their overlap says nothing.
Bars show each stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Applied Matls Inc COM | $66.9M | 92.5K | 17.8% | ▼−22% Reduced · −26K sh | |
| 2 | Lam Research Corp COM NEW | $64.5M | 148.9K | 17.2% | ▼−6.8% Reduced · −11K sh | |
| 3 | Kla Corp COM NEW | $41.0M | 136.0K | 10.9% | ▲10× Added · +122K sh | |
| 4 | Warner Bros Discovery Inc COM SER A | $24.7M | 927.9K | 6.6% | ▼−4.5% Reduced · −43K sh | |
| 5 | Cisco Sys Inc COM | $24.2M | 206.0K | 6.4% | —Held | |
| 6 | Apple Inc COM | $22.7M | 78.6K | 6.1% | —Held | |
| 7 | Wells Fargo & Co COM | $21.0M | 254.2K | 5.6% | —Held | |
| 8 | Intel Corp COM | $16.1M | 115.1K | 4.3% | —Held | |
| 9 | Microsoft Corp COM | $15.2M | 40.8K | 4.1% | ▲+6.0% Added · +2K sh | |
| 10 | Nike Inc CL B | $14.8M | 361.5K | 4.0% | ▲+49% Added · +119K sh | |
| 11 | Gatx Corp COM | $14.8M | 83.4K | 3.9% | —Held | |
| 12 | Comcast Corp New CL A | $13.5M | 549.5K | 3.6% | ▲+14% Added · +69K sh | |
| 13 | Eagle Matls Inc COM | $13.3M | 59.2K | 3.5% | —Held | |
| 14 | Bank Of Amer Corp COM | $8.3M | 146.0K | 2.2% | —Held | |
| 15 | Versant Media Group Inc COM CL A | $8.0M | 221.3K | 2.1% | ▲+7.2% Added · +15K sh | |
| 16 | HP Inc COM | $6.5M | 295.4K | 1.7% | —Held |
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/1730580/holdings"
Use Arkolith to show Harbor Island Capital LLC's latest holdings, largest changes, and filing provenance.
As-of date vs the date the SEC received each filing
Reported 13F total per quarter. Raw filing totals can include option notional.
| Quarter | As of | Filed | Lag | Positions | Value | Form |
|---|---|---|---|---|---|---|
| Q2 2026 | Jun 30, 2026 | Jul 30, 2026 | 30d | 16 | $375.6M | 13F-HR |
| Q1 2026 | Mar 31, 2026 | May 12, 2026 | 42d | 16 | $269.2M | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Jan 23, 2026 | 23d | 15 | $260.8M | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Oct 22, 2025 | 22d | 15 | $233.7M | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Aug 7, 2025 | 38d | 15 | $213.1M | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 9, 2025 | 39d | 16 | $201.9M | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Jan 27, 2025 | 27d | 15 | $209.0M | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Oct 17, 2024 | 17d | 15 | $211.4M | 13F-HR |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. Price-derived performance is withheld until the price-source policy and freshness gate are green.