Houghton Kathleen has filed 15 insider transactions across 1 company since June 2021.
Most recent transaction: a option exercise of 120000 shares of HUDSON TECHNOLOGIES INC /NY ($HDSN) on January 08, 2026.
Activity breakdown: 0 open-market purchases and 3 sales.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan. 8, 2026 | HUDSON TECHNOLOGIES INC /NY | $HDSN | Houghton Kathleen | Sr. VP-Sales and Marketing | M | Stock Option | 120000 | $0.00 | 0.0000 | 45,245,197 | 100.00% | 0.27% |
| Jan. 8, 2026 | HUDSON TECHNOLOGIES INC /NY | $HDSN | Houghton Kathleen | Sr. VP-Sales and Marketing | M | Stock Option | 50888 | $0.00 | 0.0000 | 45,245,197 | 100.00% | 0.11% |
| Jan. 8, 2026 | HUDSON TECHNOLOGIES INC /NY | $HDSN | Houghton Kathleen | Sr. VP-Sales and Marketing | M | Stock Option | 47619 | $0.00 | 0.0000 | 45,245,197 | 100.00% | 0.11% |
| Jan. 8, 2026 | HUDSON TECHNOLOGIES INC /NY | $HDSN | Houghton Kathleen | Sr. VP-Sales and Marketing | M | Common Stock | 120000 | $0.75 | 161,163.0000 | 45,245,197 | 291.52% | 0.27% |
| Jan. 8, 2026 | HUDSON TECHNOLOGIES INC /NY | $HDSN | Houghton Kathleen | Sr. VP-Sales and Marketing | F | Common Stock | 44873 | $7.10 | 116,290.0000 | 45,245,197 | 27.84% | 0.10% |
| Jan. 8, 2026 | HUDSON TECHNOLOGIES INC /NY | $HDSN | Houghton Kathleen | Sr. VP-Sales and Marketing | M | Common Stock | 47619 | $1.60 | 163,909.0000 | 45,245,197 | 40.95% | 0.11% |
| Jan. 8, 2026 | HUDSON TECHNOLOGIES INC /NY | $HDSN | Houghton Kathleen | Sr. VP-Sales and Marketing | F | Common Stock | 21797 | $7.10 | 142,112.0000 | 45,245,197 | 13.30% | 0.05% |
| Jan. 8, 2026 | HUDSON TECHNOLOGIES INC /NY | $HDSN | Houghton Kathleen | Sr. VP-Sales and Marketing | M | Common Stock | 50888 | $3.81 | 193,000.0000 | 45,245,197 | 35.81% | 0.11% |
| Jan. 8, 2026 | HUDSON TECHNOLOGIES INC /NY | $HDSN | Houghton Kathleen | Sr. VP-Sales and Marketing | F | Common Stock | 34382 | $7.10 | 158,618.0000 | 45,245,197 | 17.81% | 0.08% |
| March 13, 2025 | HUDSON TECHNOLOGIES INC /NY | $HDSN | Houghton Kathleen | Sr. VP-Sales and Marketing | A | Stock Option | 72477 | $0.00 | 72,477.0000 | 47,076,477 | 9999.99% | 0.15% |
| Feb. 27, 2024 | HUDSON TECHNOLOGIES INC /NY | $HDSN | Houghton Kathleen | Sr. VP-Sales and Marketing | A | Stock option | 9444 | $0.00 | 9,444.0000 | 47,338,231 | 9999.99% | 0.02% |
| March 1, 2023 | HUDSON TECHNOLOGIES INC /NY | $HDSN | Houghton Kathleen | VP-Sales and Marketing | A | Stock option | 66757 | $0.00 | 66,757.0000 | 47,109,018 | 9999.99% | 0.14% |
| June 9, 2021 | HUDSON TECHNOLOGIES INC /NY | $HDSN | Houghton Kathleen | VP-Sales and Marketing | S | Common Stock | 2890 | $2.97 | 44,958.0000 | 43,353,213 | 6.04% | 0.01% |
| June 9, 2021 | HUDSON TECHNOLOGIES INC /NY | $HDSN | Houghton Kathleen | VP-Sales and Marketing | S | Common Stock | 2701 | $2.96 | 42,257.0000 | 43,353,213 | 6.01% | 0.01% |
| June 9, 2021 | HUDSON TECHNOLOGIES INC /NY | $HDSN | Houghton Kathleen | VP-Sales and Marketing | S | Common Stock | 1094 | $2.95 | 41,163.0000 | 43,353,213 | 2.59% | 0.00% |