DOSSIER · 13F-HR · Q3 2026

PARTHENON LLC

$967M in tracked AUM across 129 positions as of Q3 2026.

PL
CIK 0001088859 · last filed Sep 30, 2026
Total AUM
$967M
as of Q3 2026
Holdings
129
—
positions
Whale Score
62
62
tracked
Activity
—
no data
changes this Q
AI Analysis · Q3 2026
Portfolio Overview

Based on the SEC 13F filing for the period ending December 31, 2025, PARTHENON LLC manages a portfolio valued at approximately $926.70 million. This represents a dramatic capital increase of +252.1% compared to the previous quarter's value of $263.22 million. Such a significant expansion in Assets Under Management (AUM) suggests a substantial capital inflow, a major consolidation, or a strategic pivot by the firm.

The portfolio is diversified across **131 holdings...

Key Holdings

The portfolio is anchored by mega-cap technology and financial services leaders, reflecting a "blue chip" focus.

Analysis generated by 13F Insight from SEC Form 13F filing data · Q3 2026. Methodology

Quarter at a glance — Q3 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q3 2026.

#HoldingValueSharesWeight
01
MSFT
MICROSOFT CORP
$117M227K12.0%
02
BRK/B
BERKSHIRE HATHAWAY INC DEL
$68M137K7.0%
03
GOOGL
ALPHABET INC
$52M150K5.3%
04
META
META PLATFORMS INC
$49M68K5.1%
05
AAPL
APPLE INC
$42M126K4.3%
06
GOOG
ALPHABET INC
$37M109K3.8%
07
GLW
CORNING INC
$35M229K3.6%
08
JNJ
JOHNSON & JOHNSON
$32M120K3.3%
09
XOM
EXXONMOBIL HOLDINGS CORP
$27M167K2.8%
10
FAST
FASTENAL CO
$26M517K2.6%

Filing history

2026Q3Sep 30
$967M▲ 0.6%
129 positionsView →
2026Q2Jun 30
$962M▲ 10.0%
133 positionsView →
2026Q1Mar 31
$875M▼ 5.6%
127 positionsView →
2025Q4Dec 31
$927M▲ 2.7%
131 positionsView →
2025Q3Sep 30
$903M▲ 3.2%
129 positionsLocked
2025Q2Jun 30
$874M▲ 7.5%
126 positionsLocked
2025Q1Mar 31
$813M▼ 1.6%
122 positionsLocked
2024Q4Dec 31
$827M▼ 1.3%
123 positionsLocked
2024Q3Sep 30
$837M▲ 6.4%
125 positionsLocked
2024Q2Jun 30
$787M▼ 0.2%
121 positionsLocked
2024Q1Mar 31
$789M▲ 9.0%
121 positionsLocked
2023Q4Dec 31
$723M▲ 8.5%
117 positionsLocked
Showing 12 of 100