DOSSIER · 13F-HR · Q2 2026

Harbor Island Capital LLC

$376M in tracked AUM across 16 positions as of Q2 2026.

HI
CIK 0001730580 · last filed Jun 30, 2026
Total AUM
$376M
as of Q2 2026
Holdings
16
positions
Whale Score
71
71
strong
Activity
no data
changes this Q
AI Analysis · Q2 2026
Portfolio Overview

Harbor Island Capital LLC’s filing for the period ending December 31, 2025, reveals a dramatic transformation in the firm's portfolio structure and scale. The total portfolio value surged by 522.6%, growing from approximately $41.89 million to $260.81 million in a single quarter. This exponential increase in assets under management (AUM) suggests a significant capital inflow, a major consolidation of assets, or a shift in strategy that necessitated a rapid depl...

The portfolio is highly concentrated, comprising only 15 holdings. This indicates a conviction-based strategy rather than a broad-based indexing approach. The firm has adopted a high-conviction, "barbell" style of investing, where capital is allocated to a select few high-conviction ideas. The turnover for this quarter was exceptionally high, with the firm completely overhauling its previous book of business, initiating 11 new positions while selling off the majority of its prior assets (implied by the lack of "Sold Positions" data matching the new capital inflow, though the data shows 0 sold positions relative to the current list, the massive AUM change combined with 11 new positions implies a structural pivot).

Key Holdings
Analysis generated by 13F Insight from SEC Form 13F filing data · Q2 2026. Methodology

Quarter at a glance — Q2 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q2 2026.

#HoldingValueSharesWeight
01
AMAT
APPLIED MATLS INC
$67M92K17.8%
02
LRCX
LAM RESEARCH CORP
$65M149K17.2%
03
KLAC
KLA CORP
$41M136K10.9%
04
WBD
WARNER BROS DISCOVERY INC
$25M928K6.6%
05
CSCO
CISCO SYS INC
$24M206K6.4%
06
AAPL
APPLE INC
$23M79K6.1%
07
WFC
WELLS FARGO & CO
$21M254K5.6%
08
INTC
INTEL CORP
$16M115K4.3%
09
MSFT
MICROSOFT CORP
$15M41K4.1%
10
NKE
NIKE INC
$15M361K4.0%

Filing history

2026Q2Jun 30
$376M 39.5%
16 positionsView →
2026Q1Mar 31
$269M 3.2%
16 positionsView →
2025Q4Dec 31
$261M 522.6%
15 positionsView →
2025Q3Sep 30
$42M 80.3%
4 positionsView →
2025Q2Jun 30
$213M 357.2%
15 positionsLocked
2025Q1Mar 31
$47M 77.7%
5 positionsLocked
2024Q4Dec 31
$209M 1.1%
15 positionsLocked
2024Q3Sep 30
$211M 9.0%
15 positionsLocked
2024Q2Jun 30
$232M 6.4%
15 positionsLocked
2024Q1Mar 31
$218M 8.3%
15 positionsLocked
2023Q4Dec 31
$202M 16.5%
15 positionsLocked
2023Q3Sep 30
$173M 7.4%
15 positionsLocked
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