683 Capital Management, LLC HDSN — HUDSON TECHNOLOGIES INC

Ownership history in 683 Capital Management, LLC  ·  9 quarters on record

AI Ownership Summary

683 Capital Management, LLC reported HUDSON TECHNOLOGIES INC (HDSN) in 9 quarterly 13F filings from 2024 Q2 through 2026 Q2. Peak portfolio weight reached 0.22% in 2024 Q4. The latest visible filing shows HDSN at 0.09% 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 HDSN ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was 683 Capital Management, LLC's position in HUDSON TECHNOLOGIES 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 Q2

HDSN was reported at 0.09% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.22% in 2024 Q4

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

Time in book
Holding Window
2024 Q2 to 2026 Q2

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.

HDSN stock page 683 Capital Management, LLC fund profile 683 Capital Management, LLC full holdings
How 683 Capital Management, LLC held HDSN — position size vs. price
% of Fund (quarterly)    HDSN price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 9 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q2 UNCHANGED — — — 325,000 — 0% 0.09% $1.9M 2026-08-14 $5.67
2026 Q1 REDUCED — — — 325,000 -10,000 -3.0% 0.10% $1.9M 2026-05-15 $4.92
2025 Q4 REDUCED — — — 335,000 -15,000 -4.3% 0.10% $2.3M 2026-02-17 $7.24
2025 Q3 REDUCED 6.7% -31.0% ✅ 350,000 -25,000 -6.7% 0.18% $3.5M 2025-11-14 $6.79
2025 Q2 REDUCED 6.9% +19.6% ❌ 375,000 -27,583 -6.9% 0.20% $3.0M 2025-08-14 $9.60
2025 Q1 REDUCED 36.7% +31.6% ❌ 402,583 -233,317 -36.7% 0.17% $2.5M 2025-05-15 $7.88
2024 Q4 ADDED — — — 635,900 +300,110 +89.4% 0.22% $3.5M 2025-02-14 $5.84
2024 Q3 ADDED — — — 335,790 +85,227 +34.0% 0.21% $2.8M 2024-11-14 $6.18
2024 Q2 INITIATED — — — 250,563 — — 0.17% $2.2M 2024-08-14 $7.92

🏢 Other funds also holding HDSN

As of 2026 Q2 — sorted by position size

Hartree Partners, LP 3Y 7Y 5.4% WESTERLY CAPITAL MANAGEMENT, LLC 3Y 7Y 3.58% CASPIAN CAPITAL LP 3Y 7Y 2.37% KESTREL INVESTMENT MANAGEMENT CORP 3Y 7Y 0.63% Kerrisdale Advisers, LLC 3Y 7Y 0.43% JB CAPITAL PARTNERS LP 3Y 0.27% MARATHON CAPITAL MANAGEMENT 3Y 7Y 0.2% EntryPoint Capital, LLC 0.19% Pacific Ridge Capital Partners, LLC 3Y 7Y 0.18% Park Capital Management, LLC / WI 0.09%

FAQ About 683 Capital Management, LLC and HDSN

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

How long has 683 Capital Management, LLC reported owning HDSN?

683 Capital Management, LLC reported HDSN across 9 quarterly 13F filings, from 2024 Q2 through 2026 Q2.

What was the largest reported HDSN position in 683 Capital Management, LLC's portfolio?

The largest reported portfolio weight for HDSN was 0.22% in 2024 Q4.

What is the latest reported HDSN position on this page?

The most recent filing on this page is 2026 Q2, when 683 Capital Management, LLC reported 325,000 shares, equal to 0.09% of portfolio, with an estimated market value of $1.9M.

What does the chart on this HDSN ownership page compare?

The chart compares 683 Capital Management, LLC's quarterly HDSN 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.

How well did 683 Capital Management, LLC time their HDSN position?

Based on 13F filing dates vs. subsequent HDSN price moves, 683 Capital Management, LLC correctly timed 3 out of 8 reported position changes (38%). The annualised alpha on HDSN relative to SPY over the holding period was +291.2%.

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