DOSSIER · 13F-HR · Q2 2026

Mesirow Financial Investment Management, Inc.

$6.4B in tracked AUM across 529 positions as of Q2 2026.

MF
CIK 0001469475 · last filed Jun 30, 2026
Total AUM
$6.4B
as of Q2 2026
Holdings
529
positions
Whale Score
61
61
tracked
Activity
no data
changes this Q
AI Analysis · Q2 2026
Comprehensive Analysis of Mesirow Financial Investment Management, Inc. 13F Filing
Portfolio Overview

As of the report date September 30, 2025, Mesirow Financial Investment Management, Inc. oversaw a total portfolio valued at approximately $5.59 billion, distributed across 554 holdings. This represents a growth of 9.0% from the previous quarter's value of $5.13 billion. The portfolio is characterized by a hybrid investment strategy that blends passive market exposure through Ex...

Key Holdings

The portfolio is top-heavy regarding individual stock selection, with Berkshire Hathaway (BRK/B) standing as the single largest equity holding at $484.58 million, representing 8.67% of the total portfolio. This significant allocation underscores a strong conviction in value-oriented financial management and stability. Following Berkshire, the top individual stock positions are dominated by the technology sector's "Magnificent Seven," with Apple Inc. (AAPL) at $268.21 million (4.80%) and Microsoft Corp (MSFT) at $171.22 million (3.06%).

Beyond individual equities, the portfolio relies heavily on ETFs to achieve scale and liquidity. Notably, the VanEck Vectors Morningstar Wide Moat ETF (MOAT) is the third-largest position at $260.39 million (4.66%), signaling a preference for companies with sustainable competitive advantages. Additionally, the iShares Core S&P Small-Cap ETF (IJR) holds a substantial weight of $175.65 million (3.14%), indicating a tactical tilt toward small-cap equities, likely seeking growth potential or valuation upside often found in smaller companies compared to large-cap peers.

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
BRK/B
BERKSHIRE HATHAWAY INC DEL
$491M980K7.7%
02
AAPL
APPLE INC
$293M1.0M4.6%
03
MOAT
VANECK ETF TRUST
$275M2.6M4.3%
04
IJR
ISHARES TR
$240M1.6M3.8%
05
GOOG
ALPHABET INC
$198M559K3.1%
06
IVV
ISHARES TR
$185M247K2.9%
07
ITOT
ISHARES TR
$177M1.1M2.8%
08
VOO
VANGUARD INDEX FDS
$151M219K2.4%
09
GOOGL
ALPHABET INC
$131M368K2.1%
10
MSFT
MICROSOFT CORP
$117M314K1.8%

Filing history

2026Q2Jun 30
$6.4B 3.1%
529 positionsView →
2026Q1Mar 31
$6.2B 26.8%
517 positionsView →
2025Q4Dec 31
$4.9B 12.9%
485 positionsView →
2025Q3Sep 30
$5.6B 9.0%
554 positionsView →
2025Q2Jun 30
$5.1B 0.6%
536 positionsLocked
2025Q1Mar 31
$5.2B 2.5%
593 positionsLocked
2024Q4Dec 31
$5.0B 2.6%
596 positionsLocked
2024Q3Sep 30
$5.2B 16.4%
646 positionsLocked
2024Q2Jun 30
$4.4B 1.0%
508 positionsLocked
2024Q1Mar 31
$4.4B 60.5%
525 positionsLocked
2023Q4Dec 31
$2.7B 11818.9%
565 positionsLocked
2023Q3Sep 30
$23M 2.6%
81 positionsLocked
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