RUSH ISLAND MANAGEMENT, LP: ESSEX PPTY TR INC (ESS): Quarterly 13F Position History
As of Q1 2026, RUSH ISLAND MANAGEMENT, LP reported 807,893 shares of ESSEX PPTY TR INC (ESS), worth $195.5M and representing 13.1% of its 13F equity book. Quarter-over-quarter share count change: + 170,682 (+26.8%) . The position first appeared in Q1 2023 and has been disclosed across 13 13F-HR filings in Pactolio's tracked window.
- 807,893Shares Held (Latest Filing)
- $195.5MReported Market Value (Latest Filing)
- 13.1%Portfolio Weight (% of 13F Equity Book)
- +170,682Quarter-over-Quarter Share Change
- +$28.8MQuarter-over-Quarter Value Change
- 807,893Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 13 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 807,893 | +170,682 | +26.8% | $195.5M | 13.1% | $242.0 |
| Q4 2025 | 637,211 | +43,103 | +7.3% | $166.7M | 10.4% | $261.7 |
| Q3 2025 | 594,108 | +594,108 | — | $159.0M | 10.9% | $267.7 |
| Q2 2025 | 0 | 0 | — | $0 | 0.0% | — |
| Q1 2025 | 0 | 0 | — | $0 | 0.0% | — |
| Q4 2024 | 0 | 0 | — | $0 | 0.0% | — |
| Q3 2024 | 0 | 0 | — | $0 | 0.0% | — |
| Q2 2024 | 0 | 0 | — | $0 | 0.0% | — |
| Q1 2024 | 0 | 0 | — | $0 | 0.0% | — |
| Q4 2023 | 0 | 0 | — | $0 | 0.0% | — |
| Q3 2023 | 0 | 548,925 | -100.0% | $0 | 0.0% | — |
| Q2 2023 | 548,925 | +30,647 | +5.9% | $128.6M | 13.1% | $234.3 |
| Q1 2023 | 518,278 | — | — | $108.4M | 13.3% | $209.1 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares — a quarter-end mark, not the manager's cost basis. See the full methodology document for the normalization rules.
When did RUSH ISLAND MANAGEMENT, LP first disclose a ESS position in 13F-HR filings?
RUSH ISLAND MANAGEMENT, LP first reported ESSEX PPTY TR INC (ESS) on its 13F-HR filing for the period ending 2023-03-31 (Q1 2023). The position has appeared on 13 reported quarters within Pactolio's tracked window.
What was RUSH ISLAND MANAGEMENT, LP's most recent quarter-over-quarter share-count change in ESS?
Between Q4 2025 and Q1 2026, RUSH ISLAND MANAGEMENT, LP added 170,682 shares of ESS (+26.8%), bringing the total reported position to 807,893 shares at a market value of $195.5M.
Does the implied price-per-share represent RUSH ISLAND MANAGEMENT, LP's cost basis in ESS?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.