RUSH ISLAND MANAGEMENT, LP
Long book
$1.49B
Q1 2026
Positions
22
Top-10 weight
80%
concentration
Last quarter
+18.1%
SPY +14.8%
Turnover
50%
of book per quarter
Strategy in plain words
auto-generated from filingsRUSH ISLAND MANAGEMENT, LP is a concentrated fundamental stock-picker, specialised in real_estate (97% of the long book), running a $1.49B US long book across 22 positions.
The portfolio is extremely concentrated — the top 10 positions are almost the whole book. The portfolio is actively managed, with meaningful quarterly turnover. Current anchor positions: ESSEX PROPERTY TRUST INC, SBA COMMUNICATIONS CORP, KILROY REALTY CORP, NNN REIT INC, HEALTHCARE REALTY TRUST INC.
Over the last 9 quarters its long book ran on average 0.3pp per quarter behind the S&P 500, beating the index in 5 of 9 quarters. We rate its filings as signal-bearing: position changes reflect genuine views.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
+4.6%
Q2 2024
+13.8%
Q3 2024
-5.8%
Q4 2024
+1.6%
Q1 2025
+0.6%
Q2 2025
+5.4%
Q3 2025
-0.1%
Q4 2025
-0.8%
Q1 2026
+18.1%
Sector allocation
Services media 84%
Healthcare 16%
Long book by quarter
What does RUSH ISLAND own?
Q1 2026 13F13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 15, 2026 | 22 | $1.49B | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 17, 2026 | 17 | $1.60B | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 14, 2025 | 17 | $1.46B | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 14, 2025 | 18 | $1.55B | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 15, 2025 | 14 | $1.57B | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 14, 2025 | 14 | $1.50B | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Nov 14, 2024 | 18 | $1.29B | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Aug 14, 2024 | 13 | $1.22B | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | May 15, 2024 | 16 | $1.15B | canonical | SEC ↗ |
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