HI
Harbor Island Capital LLC Investment Portfolio — 13F Data
Harbor Island Capital LLCCIK: 0001730580
Sector-focusedMomentum followerQuality / disciplined sizing
Total reported value
$269.2M
Reporting period: 2026-03-31 · Number of holdings: 16
Harbor Island Capital LLC disclosed 16 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $269.2M and a quarterly turnover rate of 13.4%.
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Personality snowflake
- Concentration
- 33.24
- Portfolio Stability
- 13.35
- Momentum/Contrarian
- 100
- Sector conviction
- 100
- Diversification
- 32
- Sizing Uniformity
- 94.07
Harbor Island Capital LLC's disclosed holdings carry a Herfindahl concentration index of 0.083 — mathematically equivalent to about 12 equally-sized positions, close to its 16 actual disclosed holdings. Value is spread relatively evenly across the portfolio rather than concentrated in a handful of names.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.59), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Recent moves
Add AMAT
-8.9% $7.1M
Trim MSFT
0.0% -$4.4M
Trim WFC
0.0% -$3.5M
Add KLAC
0.0% $3.5M
Trim WBD
-1.0% -$1.6M
Trim AAPL
0.0% -$1.4M
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | AMAT | Applied Materials INC | Stock-Tech | 14.99% | +2.23% | -8.85% | |
| 2 | LRCX | Lam Research CORP | Stock-Tech | 12.68% | -0.51% | -20.49% | |
| 3 | WBD | Warner Bros Discovery INC | Stock-Comm Services | 9.91% | -0.93% | -1.03% | |
| 4 | WFC | Wells Fargo & Co | Stock-Financials | 7.52% | -1.56% | — | |
| 5 | KLAC | Kla CORP | Stock-Tech | 7.44% | +1.11% | — | |
| 6 | AAPL | Apple INC | Stock-Tech | 7.41% | -0.78% | — | |
| 7 | CSCO | Cisco Systems INC | Stock-Tech | 5.94% | -0.14% | — | |
| 8 | MSFT | Microsoft CORP | Stock-Tech | 5.30% | -1.84% | — | |
| 9 | GATX | Gatx CORP | Stock-Industrials | 5.29% | -0.13% | — | |
| 10 | CMCSA | Comcast Corp-class A | Stock-Comm Services | 5.12% | -0.39% | — | |
| 11 | NKE | Nike INC -cl B | Stock-Consumer Disc | 4.77% | -0.04% | +23.39% | |
| 12 | EXP | Eagle Materials INC | Stock-Materials | 4.16% | +0.76% | +37.83% | |
| 13 | VSNT | Versant Media Group INC | Stock-Comm Services | 2.84% | +2.84% | NEW | |
| 14 | BAC | Bank Of America CORP | Stock-Financials | 2.64% | -0.44% | — | |
| 15 | HPQ | Hp INC | Stock-Tech | 2.11% | -0.41% | — | |
| 16 | INTC | Intel CORP | Stock-Tech | 1.89% | +0.26% | — |
Portfolio Performance
Performance for Q3 2026
+18.2%
Performance Last 4 Quarters
+100.4%
Based on 75% of reported portfolio value with available pricing
- Stdev
- +26.8%
- Beta
- +1.34
- Alpha
- +9.5%
- Max Drawdown
- -15.3%
- Annualized Perf
- +35.5%
- Batting Avg vs S&P
- +52.8%
- Sortino
- +2.71
- Stutzer
- +0.38
- Treynor
- +0.26
- Sterling
- +1.57
- Calmar
- +2.32
- Information Ratio
- +0.76
- Tracking Error
- +20.8%
- Stdev Down
- +12.6%
- Winning Months %
- +58.3%
- Losing Months %
- +41.7%
- Best 12 Months
- +135.3%
- Worst 12 Months
- -5.7%
- Efficiency Ratio
- +0.65
- Sharpe
- +1.27
- Stdev Sectors
- +19%
- Skewness
- +0.23
- Kurtosis
- 0
- Upside Potential
- +4.37
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 16 | $269.2M | 13 | |
| 2025-12-31 | 15 | $260.8M | 15 | |
| 2025-09-30 | 15 | $233.7M | 20 | |
| 2025-06-30 | 15 | $213.1M | 0 | |
| 2025-03-31 | 16 | $201.9M | 100 | |
| 2024-12-31 | 15 | $209.0M | 0 | |
| 2024-09-30 | 15 | $211.4M | 0 | |
| 2024-06-30 | 15 | $232.2M | 0 | |
| 2024-03-31 | 15 | $218.3M | 0 | |
| 2023-12-31 | 15 | $201.6M | 0 | |
| 2023-09-30 | 15 | $173.1M | 0 | |
| 2023-06-30 | 15 | $187.0M | 0 | |
| 2023-03-31 | 15 | $182.1M | 0 | |
| 2022-12-31 | 15 | $157.1M | 0 | |
| 2022-09-30 | 15 | $143.0M | 0 | |
| 2022-06-30 | 15 | $163.4M | 0 | |
| 2022-03-31 | 15 | $208.3M | 0 | |
| 2021-12-31 | 15 | $225.5M | 0 | |
| 2021-09-30 | 15 | $189.9M | 0 | |
| 2021-06-30 | 15 | $201.0M | 100 | |
| 2021-03-31 | 15 | $192.5M | 23 | |
| 2020-12-31 | 15 | $155.9M | 26 | |
| 2020-09-30 | 15 | $124.4M | 8 | |
| 2020-06-30 | 15 | $119.7M | 24 | |
| 2020-03-31 | 17 | $103.7M | 32 | |
| 2019-12-31 | 17 | $133.5M | 12 | |
| 2019-09-30 | 17 | $118.7M | 12 | |
| 2019-06-30 | 17 | $110.9M | 12 | |
| 2019-03-31 | 17 | $106.7M | 24 | |
| 2018-12-31 | 18 | $97.1M | 19 | |
| 2018-09-30 | 19 | $114.0M | 21 | |
| 2018-06-30 | 17 | $110.5M | 7 | |
| 2018-03-31 | 17 | $112.2M | 11 | |
| 2017-12-31 | 17 | $112.6M | — |
Holding changes this quarter
Harbor Island Capital LLC's most significant position changes for 2026-03-31: New buy: Versant Media Group INC (VSNT); Trim: Applied Materials INC (AMAT) — shares -8.85%; Trim: Warner Bros Discovery INC (WBD) — shares -1.03%; Add: Eagle Materials INC (EXP) — shares +37.83%; Trim: Lam Research CORP (LRCX) — shares -20.49%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | AMAT | Applied Materials INC | +2.2% | -8.85% | Trim |
| 2 | KLAC | Kla CORP | +1.1% | — | Unchanged |
| 3 | EXP | Eagle Materials INC | +0.8% | +37.83% | Add |
| 4 | INTC | Intel CORP | +0.3% | — | Unchanged |
| 5 | NKE | Nike INC -cl B | 0% | +23.39% | Add |
| 6 | GATX | Gatx CORP | -0.1% | — | Unchanged |
| 7 | CSCO | Cisco Systems INC | -0.1% | — | Unchanged |
| 8 | CMCSA | Comcast Corp-class A | -0.4% | — | Unchanged |
| 9 | HPQ | Hp INC | -0.4% | — | Unchanged |
| 10 | BAC | Bank Of America CORP | -0.4% | — | Unchanged |
| 11 | LRCX | Lam Research CORP | -0.5% | -20.49% | Trim |
| 12 | AAPL | Apple INC | -0.8% | — | Unchanged |
| 13 | WBD | Warner Bros Discovery INC | -0.9% | -1.03% | Trim |
| 14 | WFC | Wells Fargo & Co | -1.6% | — | Unchanged |
| 15 | MSFT | Microsoft CORP | -1.8% | — | Unchanged |
| 16 | VSNT | Versant Media Group INC | — | NEW | New buy |
Filing History
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-12 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-01-23 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-10-22 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-08-07 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-09 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-01-27 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-10-17 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-07-25 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-04-18 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-01-17 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-07 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-07-13 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-04-17 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-01-17 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-10-14 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-07-26 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-06 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-01-27 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-10-19 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-07-28 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-04-15 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-01-26 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-10-27 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-04 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-04-30 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-01-29 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-10-29 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-07-25 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-05-09 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-02-01 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-11-05 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-08-03 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-04-25 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-02-09 | 13F-HR | View on EDGAR |
FAQ
What is Harbor Island Capital LLC and what type of investor is it?
Harbor Island Capital LLC is a investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-03-31), the firm manages a tracked equity portfolio valued at approximately $269.2M, spread across 16 disclosed positions.
What are Harbor Island Capital LLC's largest equity positions?
Based on the latest 13F filing, Harbor Island Capital LLC's top holdings by market value are:
1. Applied Materials INC (AMAT) — $40.4M (15.0%)
2. Lam Research CORP (LRCX) — $34.1M (12.7%)
3. Warner Bros Discovery INC (WBD) — $26.7M (9.9%)
4. Wells Fargo & Co (WFC) — $20.2M (7.5%)
5. Kla CORP (KLAC) — $20.0M (7.4%)
What changes did Harbor Island Capital LLC make in its most recent portfolio filing?
In the latest reported quarter, Harbor Island Capital LLC made 6 notable position adjustments: 1 new positions were initiated, 2 existing holdings were added to, 3 positions were partially reduced, and 0 were completely exited. The largest of these moves: New buy: Versant Media Group INC (VSNT); Trim: Applied Materials INC (AMAT) — shares -8.85%; Trim: Warner Bros Discovery INC (WBD) — shares -1.03%; Add: Eagle Materials INC (EXP) — shares +37.83%; Trim: Lam Research CORP (LRCX) — shares -20.49%
What sectors does Harbor Island Capital LLC focus on?
Harbor Island Capital LLC is concentrated in the following sectors based on its current disclosed equity portfolio:
• Information Technology: 57.8%
• Communication Services: 17.9%
• Financials: 10.2%
• Industrials: 5.3%
• Consumer Discretionary: 4.8%
• Materials: 4.2%
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