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Parthenon LLC

CIK:0001088859
Investment Adviser
$1B AUM
126 holdings
Louisville, KY, United States
Founded:1999
7 employees
Latest filing:Jun 30, 2025

Parthenon LLC is an independent investment adviser headquartered in Louisville, KY, founded in 1999 by four experienced investment professionals and an administrative team. With 7 employees, Parthenon specializes in investment management services for high net worth families, trusts, individuals, and institutional clients such as foundations, ERISA plans, family foundations, and corporations. The firm emphasizes logical and rational investment management, conducting diligent research in-house, and maintains a limited number of client relationships to ensure high service levels.

Investment Strategy

Parthenon LLC deploys an in-house research-driven investment approach, providing customized asset management for high-net-worth individuals and institutional clients. Their strategy focuses on diversification across equity and fixed income portfolios, tailoring allocations to client objectives including return maximization, liquidity, and income needs. The firm’s philosophy prioritizes rational, logical decision-making and client-specific solutions, often concentrating in blue-chip equities and high-quality fixed income instruments, while limiting the client base for personalized service.

Top Buys
M
MSFTMICROSOFT CORP
+$28.0M
M
METAMETA PLATFORMS INC
+$11.3M
I
ICLRICON PLC
+$9.0M
B
BKNGBOOKING HOLDINGS INC
+$4.1M
B
BATRKATLANTA BRAVES HLDGS INC
+$3.9M
Top Sells
B
BRK-BBERKSHIRE HATHAWAY INC DEL
-$6.9M
P
PAYXPAYCHEX INC
-$3.0M
X
XOMEXXON MOBIL CORP
-$2.5M
A
AAPLAPPLE INC
-$2.1M
P
PGPROCTER AND GAMBLE CO
-$1.9M

Top Holdings

M
MSFTMICROSOFT CORP
+13.8%$120.7M
B
BRK-BBERKSHIRE HATHAWAY INC DEL
+7.9%$69.1M
M
METAMETA PLATFORMS INC
+6.0%$52.9M
P
PAYXPAYCHEX INC
+4.2%$36.4M
G
GOOGLALPHABET INC
+3.4%$29.4M

Equity Positions (125)

TickerSecurityWeightMarket ValueSharesAvg CostPriceChange (QoQ)
M
MSFT
MICROSOFT CORP13.80%$120.7M242,574$27.83$497.41+$28.0M
B
BRK-B
BERKSHIRE HATHAWAY INC DEL7.91%$69.1M142,286$91.13$485.77-$6.9M
M
META
META PLATFORMS INC6.05%$52.9M71,609$179.75$738.09+$11.3M
P
PAYX
PAYCHEX INC4.16%$36.4M249,905$29.74$145.46-$3.0M
G
GOOGL
ALPHABET INC3.36%$29.4M166,822$51.67$176.23+$3.6M

Industry Allocation

SERVICES-COMPUTER PROGRAMMING, DATA PROCESSING, ETC.
+15.0%
SERVICES-PREPACKAGED SOFTWARE
+14.1%
FIRE, MARINE & CASUALTY INSURANCE
+8.6%
PHARMACEUTICAL PREPARATIONS
+5.4%
SERVICES-ENGINEERING, ACCOUNTING, RESEARCH, MANAGEMENT
+4.2%