Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 9 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

9 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
Sept. 12, 2005 HDSN S 6,965 $1.99 $13,860 80,000 Direct -8.01% Disposed 162.8% (price as of 2026-10-02)
Sept. 12, 2005 HDSN S 9,000 $1.95 $17,550 86,965 Direct -9.38% Disposed 168.2% (price as of 2026-10-02)
Sept. 12, 2005 HDSN S 2,535 $1.94 $4,918 95,965 Direct -2.57% Disposed 169.6% (price as of 2026-10-02)
Sept. 12, 2005 HDSN S 19,486 $1.90 $37,023 98,500 Direct -16.52% Disposed 175.3% (price as of 2026-10-02)
Sept. 12, 2005 HDSN S 1,700 $1.85 $3,145 117,986 Direct -1.42% Disposed 182.7% (price as of 2026-10-02)
Sept. 12, 2005 HDSN S 314 $1.88 $590 119,686 Direct -0.26% Disposed 178.2% (price as of 2026-10-02)
June 2, 2004 HDSN P 100 $1.05 $105 50,000 Direct +0.20% Acquired 398.1% (price as of 2026-10-02)
June 1, 2004 HDSN P 600 $1.05 $630 49,900 Direct +1.22% Acquired 398.1% (price as of 2026-10-02)
May 27, 2004 HDSN P 300 $1.05 $315 49,300 Direct +0.61% Acquired 398.1% (price as of 2026-10-02)
Dec. 17, 2003 HDSN P 20,000 $1.10 $22,000 49,000 Direct +68.97% Acquired 375.5% (price as of 2026-10-02)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
Aug. 26, 2005 HDSN Stock Option - right to buy Common Stock (20,000) $0.95 Oct. 4, 2009 20,000 Disposed
Aug. 26, 2005 HDSN Stock Option - right to buy Common Stock (10,000) $1.13 March 4, 2009 10,000 Disposed
Aug. 26, 2005 HDSN Stock Option - right to buy Common Stock (10,000) $0.85 Jan. 23, 2008 10,000 Disposed
July 1, 2005 HDSN Stock Option (Right to Buy) Common Stock (20,000) $0.94 July 1, 2010 20,000 Acquired
Oct. 4, 2004 HDSN Stock Option (Right to Buy) Common Stock (20,000) $0.95 Oct. 4, 2009 20,000 Acquired
March 4, 2004 HDSN Stock Option (Right to Buy) Hudson Technologies, Inc. Common Stock (10,000) $1.13 March 4, 2009 10,000 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).