Teton Advisors, LLC ERII — ENERGY RECOVERY INC

Ownership history in Teton Advisors, LLC  ·  3 quarters on record

AI Ownership Summary

Teton Advisors, LLC reported ENERGY RECOVERY INC (ERII) in 3 quarterly 13F filings from 2025 Q3 through 2026 Q1. Peak portfolio weight reached 0.27% in 2025 Q3. The latest visible filing shows ERII at 0.19% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings.

What this ERII ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Teton Advisors, LLC's position in ENERGY RECOVERY INC, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2026 Q1

ERII was reported at 0.19% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.27% in 2025 Q3

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2025 Q3 to 2026 Q1

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

ERII stock page Teton Advisors, LLC fund profile Teton Advisors, LLC full holdings
How Teton Advisors, LLC held ERII — position size vs. price
% of Fund (quarterly)    ERII price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 3 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 REDUCED — — — 27,000 -1,000 -3.6% 0.19% $272K 2026-05-14 $8.62
2025 Q4 UNCHANGED — — — 28,000 — 0% 0.26% $378K 2026-02-05 $15.11
2025 Q3 INITIATED — — — 28,000 — — 0.27% $432K 2025-11-12 $14.26

🏢 Other funds also holding ERII

As of 2026 Q1 — sorted by position size

Kopion Asset Management, LLC 3Y 3.97% AVENIR CORP 3Y 7Y 1.0% BROWN CAPITAL MANAGEMENT LLC 3Y 7Y 0.77% Redmond Asset Management, LLC 3Y 7Y 0.59% Connective Capital Management, LLC 3Y 7Y 0.41% 683 Capital Management, LLC 3Y 7Y 0.29% Miller Global Investments, LLC 0.23% ESSEX INVESTMENT MANAGEMENT CO LLC 3Y 7Y 0.21% GSA CAPITAL PARTNERS LLP 3Y 7Y 0.2% ISTHMUS PARTNERS, LLC 3Y 7Y 0.16%

FAQ About Teton Advisors, LLC and ERII

These are the practical questions this page is built to answer before you even open the full history table.

How long has Teton Advisors, LLC reported owning ERII?

Teton Advisors, LLC reported ERII across 3 quarterly 13F filings, from 2025 Q3 through 2026 Q1.

What was the largest reported ERII position in Teton Advisors, LLC's portfolio?

The largest reported portfolio weight for ERII was 0.27% in 2025 Q3.

What is the latest reported ERII position on this page?

The most recent filing on this page is 2026 Q1, when Teton Advisors, LLC reported 27,000 shares, equal to 0.19% of portfolio, with an estimated market value of $272K.

What does the chart on this ERII ownership page compare?

The chart compares Teton Advisors, LLC's quarterly ERII portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

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