Parrillo Richard 4/A

What Happened
Richard Parrillo, a director of Hudson Technologies, purchased 10,000 shares in an open-market transaction on 2026-05-13 at $4.83 per share for a total cost of $48,257. This is a straightforward purchase (transaction code P), which is generally viewed as a neutral-to-bullish signal compared with insider sales.

Key Details

• Transaction date: 2026-05-13; Price: $4.83; Shares acquired: 10,000; Total value: $48,257.
• Filing: This is an amended Form 4 filed on 2026-05-21 to correct a software error; the original Form 4 was filed on May 15, 2026.
• Shares owned after the transaction: Not specified in the supplied amended filing.
• Transaction type/code: Open-market purchase (P).
• No footnotes indicating a 10b5-1 plan, gift, option exercise, or tax withholding were reported in the supplied excerpt.

Context
Insider purchases like this can be more informative to investors than routine sales because they show the insider acquiring company stock. The amendment appears administrative (software error correction) and does not, by itself, change the substance of the reported purchase.