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Filers›Holding Co.›Diameter Capital Partners LP
DOSSIER · 13F-HR · Q1 2026

Diameter Capital Partners LP

Diameter's holding co. based in Chicago, IL — $1.1B in tracked AUM across 29 positions as of Q1 2026.

D
Diameter·Chicago, IL·Holding Co.
CIK 0001727012 · last filed Mar 31, 2026
Total AUM
$1.1B
▼ 6.9%
vs prior
Holdings
29
—
positions
Whale Score
72
72
strong
Activity
—
no data
changes this Q
Top sector
Tech
22% weight
concentration
AI Analysis · Q1 2026 · Q1 2026
Comprehensive Analysis of Diameter Capital Partners LP 13F Filing (Q3 2025)
1. Portfolio Overview

Diameter Capital Partners LP has executed a dramatic transformation of its portfolio during the quarter ending September 30, 2025. The total portfolio value decreased by 12.5%, contracting from $876.02 million to $766.91 million. This reduction in assets under management (AUM) coincides with a massive shift in strategy, evidenced by the turnover of 35 positions (17 sold and 18 new).

The fund ...

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
SPY
STATE STR SPDR S&P 500 ETF T
$325M500K30.4%
02
SATS
ECHOSTAR CORP
$174M1.5M16.3%
03
IWM
ISHARES TR
$99M400K9.3%
04
UNIT
UNITI GROUP LLC
$53M5.7M5.0%
05
NBIS 1.25 03/15/31
NEBIUS GROUP N.V.
$39M40.0M3.6%
06
63954QAL0
NEBIUS GROUP N.V.
$37M40.0M3.5%
07
FBIN
FORTUNE BRANDS INNOVATIONS I
$26M680K2.5%
08
BKNG
BOOKING HOLDINGS INC
$25M6K2.4%
09
SILA
SILA REALTY TRUST INC
$25M1.1M2.3%
10
CZR
CAESARS ENTERTAINMENT INC NE
$24M921K2.3%

Filing history

Filing history loading…
AI Agent · grounded in Diameter
haiku-4-5 · 29 positions indexed
Sector mix
  • Tech22%
  • Health Care42%
  • Cons. Disc.5%
  • Communications15%
  • Energy9%
  • Other7%
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