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Harbor Island Capital LLC

CIK:0001730580
Investment Adviser
$227M AUM
15 holdings
Topsfield, MA, US
Founded:1999
2 employees
Latest filing:Sep 30, 2025

Harbor Island Capital LLC is a registered investment adviser headquartered in Topsfield, Massachusetts, founded in January 1999 by Paul Fortin. The firm serves primarily high-net-worth individuals and legal entities, specializing in personalized portfolio management with a fundamental, value-based approach, primarily in equities. Harbor Island Capital manages $226,900,000 in assets as of February 2025 and employs 2 people, including its founder. All client accounts are managed on a fully discretionary basis with a fiduciary duty and transparent fee structure, with no performance-based fees. The firm is regulated by the SEC and conducts internal qualitative research to guide long-term investment strategies for clients.

Investment Strategy

Harbor Island Capital LLC employs a fundamental, value-based investment philosophy focusing primarily on equities. Portfolios typically contain 10 to 25 individual companies selected based on internal research and qualitative assessments. The firm aims for a fully invested posture, occasionally employing modest leverage, and avoids performance fees. Investment management is highly personalized, allowing clients to impose reasonable restrictions and direct brokerage decisions. Harbor Island Capital's approach is long-term, with a focus on value creation and a commitment to daily account review and quarterly performance reporting.

Latest 13F Filing Activity

Harbor Island Capital LLC filed their most recent 13F report on Sep 30, 2025 disclosing 15 equity positions with a total 13F market value of $234M. The fund increased holdings in Warner Bros Discovery Inc., Apple Inc., Kla Corp. among other positions. Harbor Island Capital LLC reduced exposure to Applied Matls Inc., Lam Research Corp., HP Inc. among others.

Top Buys
W
WBDWARNER BROS DISCOVERY INC
+$8.0M
A
AAPLAPPLE INC
+$3.9M
K
KLACKLA CORP
+$2.5M
C
CMCSACOMCAST CORP NEW
+$2.0M
G
GATXGATX CORP
+$1.8M
Top Sells
E
EXPEAGLE MATLS INC
+$1.3M
I
INTCINTEL CORP
+$1.3M
W
WFCWELLS FARGO CO NEW
+$940.5K
A
AMATAPPLIED MATLS INC
-$894.9K
M
MSFTMICROSOFT CORP
+$791.3K

Top Holdings

L
LRCXLAM RESEARCH CORP
+13.2%$30.9M
A
AMATAPPLIED MATLS INC
+12.6%$29.4M
W
WFCWELLS FARGO CO NEW
+9.1%$21.3M
A
AAPLAPPLE INC
+8.6%$20.0M
M
MSFTMICROSOFT CORP
+8.5%$20.0M

Equity Positions (15)

TickerSecurityWeightMarket ValueSharesAvg CostPriceChange (QoQ)
LAM RESEARCH CORP13.23%$30.9M230,800$72.23$133.90-$680.3K
APPLIED MATLS INC12.59%$29.4M143,630$47.68$204.74-$894.9K
WELLS FARGO CO NEW9.12%$21.3M254,192$43.41$83.82+$940.5K
APPLE INC8.56%$20.0M78,561$43.00$254.63+$3.9M
MICROSOFT CORP8.54%$20.0M38,524$85.54$517.95+$791.3K

Industry Allocation

SEMICONDUCTORS & RELATED DEVICES
+14.2%
SPECIAL INDUSTRY MACHINERY, NEC
+13.2%
CABLE & OTHER PAY TELEVISION SERVICES
+12.4%
NATIONAL COMMERCIAL BANKS
+12.3%
ELECTRONIC COMPUTERS
+8.6%