DOSSIER · 13F-HR · Q4 2025

MBB PUBLIC MARKETS I LLC

$957M in tracked AUM across 27 positions as of Q4 2025.

MP
CIK 0001892378 · last filed Dec 31, 2025
Total AUM
$957M
as of Q4 2025
Holdings
27
positions
Whale Score
65
65
tracked
Activity
no data
changes this Q
AI Analysis · Q4 2025
Comprehensive SEC 13F Analysis: MBB PUBLIC MARKETS I LLC
Portfolio Overview

MBB Public Markets I LLC manages a concentrated portfolio totaling approximately $752.37 million across 38 holdings as of September 30, 2025. The firm executed a significant strategic pivot during the quarter, reducing the total portfolio value by 28.9% (down from $1.06 billion in the previous quarter). This reduction was not solely due to market performance but was driven by a substantial overhaul of the p...

Key Holdings

The portfolio is characterized by a "barbell" strategy, heavily weighted toward a few mega-cap liquid names and specific industrial/financial plays, while maintaining a long tail of smaller, new positions.

  • The Progressive Corp (PGR): This is the dominant holding, comprising 24.47% of the portfolio ($184.12M). The firm increased its stake by 26.4% during the quarter, adding $26.69 million. This signals strong conviction in the insurance underwriter, likely viewing it as a compounder with strong fundamentals.
  • AerCap Holdings NV: The second-largest position at 18.23% ($137.14M). This was the largest absolute increase in the portfolio, growing by 34.7% (an addition of $38.70M). This suggests a bullish outlook on aviation leasing and global trade.
  • Amazon.com Inc (AMZN): Representing 12.82% of the portfolio, AMZN saw a massive 63.2% increase in stake value ($37.38M added). This move aligns the portfolio with the consumer cyclical and technology sectors' growth trends.
  • Ferguson Enterprises (FERG): A solid industrial holding at 8.74% ($65.75M), which was increased by 9.3%. Ferguson provides exposure to the non-residential construction and repair markets.

Quarter at a glance — Q4 2025

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q4 2025.

#HoldingValueSharesWeight
01
PGR
PROGRESSIVE CORP
$197M866K20.6%
02
N00985106
AERCAP HOLDINGS NV
$163M1.1M17.0%
03
AMZN
AMAZON COM INC
$147M636K15.3%
04
FERG
FERGUSON ENTERPRISES INC
$104M468K10.9%
05
MDLN
MEDLINE INC
$103M2.4M10.7%
06
GOOGL
ALPHABET INC
$49M158K5.2%
07
VEA
VANGUARD TAX-MANAGED FDS
$41M662K4.3%
08
EQT
EQT CORP
$33M617K3.5%
09
VTEB
VANGUARD MUN BD FDS
$28M558K2.9%
10
TECK
TECK RESOURCES LTD
$27M563K2.8%

Filing history

2025Q4Dec 31
$957M 27.2%
27 positionsView →
2025Q3Sep 30
$752M 28.9%
38 positionsView →
2025Q2Jun 30
$1.1B 111.7%
503 positionsLocked
2025Q1Mar 31
$500M 53.6%
225 positionsLocked
2024Q4Dec 31
$1.1B 39.7%
84 positionsLocked
2024Q3Sep 30
$1.8B 63.9%
560 positionsLocked
2024Q2Jun 30
$4.9B 203.2%
693 positionsLocked
2024Q1Mar 31
$1.6B 0.5%
287 positionsLocked
2023Q4Dec 31
$1.6B 1.8%
110 positionsLocked
2023Q3Sep 30
$1.7B 13.5%
128 positionsLocked
2023Q2Jun 30
$1.9B 5.8%
127 positionsLocked
2023Q1Mar 31
$1.8B 51.2%
99 positionsLocked
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