DOSSIER · 13F-HR · Q1 2026

Millstreet Capital Management LLC

Millstreet's family office based in New York, NY $418M in tracked AUM across 2 positions as of Q1 2026.

M
Millstreet·New York, NY·Family Office
CIK 0001590729 · last filed Mar 31, 2026
Total AUM
$418M
10.4%
vs prior
Holdings
2
positions
Whale Score
71
71
strong
Activity
no data
changes this Q
Top sector
Financials
43% weight
concentration
AI Analysis · Q1 2026 · Q1 2026

Based on the SEC 13F filing data provided for Millstreet Capital Management LLC as of September 30, 2025, here is a comprehensive analysis.

1. Portfolio Overview

Millstreet Capital Management LLC currently exhibits an extremely concentrated portfolio structure, effectively resembling a "single-stock" investment strategy for the reporting period. The total portfolio value has plummeted by 90.3%, decreasing from approximately $353.95 million in the previous quarter to $34.42 million. This dra...

Quarter at a glance — Q1 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q1 2026.

#HoldingValueSharesWeight
01
DBD
DIEBOLD NIXDORF INC
$394M5.2M94.2%
02
DEC
DIVERSIFIED ENERGY CO
$24M1.4M5.8%

Filing history

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