DOSSIER · 13F-HR · Q4 2025

RUSH ISLAND MANAGEMENT, LP

RUSH ISLAND's asset manager based in Stamford, CT — $1.6B in tracked AUM across 17 positions as of Q4 2025.

RI

RUSH ISLAND·Stamford, CT·Asset Manager

CIK 0001736465 · last filed Dec 31, 2025

Total AUM

$1.6B

▲ 16.7%

vs prior

Holdings

17

—

positions

Whale Score

73

73

strong

Activity

—

no data

changes this Q

Top sector

Tech

19% weight

concentration

AI Analysis · Q4 2025 · Q4 2025

Comprehensive Analysis of RUSH ISLAND MANAGEMENT, LP (SEC 13F Q3 2025)

1. Portfolio Overview

Rush Island Management, LP reported a significant contraction in portfolio value for the quarter ending September 30, 2025. The total assets under management (AUM) decreased by 51.3%, dropping from $1.55 billion to $754.26 million. This reduction is not solely attributable to market performance but is primarily driven by a substantial reduction in position count and active capital deployment. The f...

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

SBA COMMUNICATIONS CORP NEW

$228M1.2M14.2%

02

ESSEX PPTY TR INC

$167M637K10.4%

03

HEALTHCARE RLTY TR

$153M9.0M9.5%

04

NNN REIT INC

$152M3.8M9.5%

05

UDR INC

$131M3.6M8.2%

06

FEDERAL RLTY INVT TR NEW

$130M1.3M8.1%

07

VENTAS INC

$126M1.6M7.9%

08

FIRST INDL RLTY TR INC

$119M2.1M7.4%

09

REALTY INCOME CORP

$113M2.0M7.1%

10

KILROY RLTY CORP

$98M2.6M6.2%

Filing history

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