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HDSN · HUDSON TECHNOLOGIES INC /NY

Everything on this page is public record — SEC Form 4 filings and congressional disclosures — alongside any INSIDER SCANNER research case for this company.

Open-market buys3
Open-market sells0
Total purchased$673,526
Unique insiders buying1
Avg price paid$5.10
Research cases0
Last filing2026-09-24

Average price paid is weighted by shares, so a large purchase counts for more than a small one. It is what insiders reported paying, not a target or a fair value.

Insider flow: Buying only — a count of disclosed transactions, not a rating or a recommendation.

Insider transaction timeline

Every reported transaction, positioned by trade date. Purchases sit above the axis, sales below; circle area is proportional to dollar value. No share-price line is drawn — this feed carries transaction prices only, and a price history inferred from them would imply market data the filings do not contain.

Open-market purchase Open-market sale
2026-09-21 — Hartree Partners, LP · bought 2,502 @ $5.10 2026-09-23 — Hartree Partners, LP · bought 11,013 @ $5.10 2026-09-24 — Hartree Partners, LP · bought 118,549 @ $5.10
2026-09-212026-09-24

Insider cost basis

Share-weighted average price across 3 reported purchases, with the full range of prices paid. Purchases only — averaging a sale into an "insider cost" would describe a price nobody paid.

$5.10 $5.10
$5.10 weighted average insider purchase price

Insider participation

One row per insider, one cell per reported transaction, shaded by value. Repeat buying and activity clustered in time are visible at a glance.

Hartree Partners, LP 10% owner
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The analysis built on top of these filings

The filings above are public record and stay public here. What an account adds for $HDSN is the reading of them — and for this company, that is what the list below says it is, no more.

  • Insider cost basisShare-weighted average price paid across the 3 reported purchases, with the full range, against the current price.
  • Insider participationWho bought, how often, and how the buying is distributed across the people filing — one person repeating is not several agreeing.
  • Transaction timelineThe [{'transaction_date': '2026-09-24', 'insider_name': 'Hartree Partners, LP', 'insider_title': '10% owner', 'transaction_type': 'Open-market buy', 'shares': 118549.0, 'price': 5.1, 'value': 604599.9, 'is_buy': True}, {'transaction_date': '2026-09-23', 'insider_name': 'Hartree Partners, LP', 'insider_title': '10% owner', 'transaction_type': 'Open-market buy', 'shares': 11013.0, 'price': 5.1, 'value': 56166.3, 'is_buy': True}, {'transaction_date': '2026-09-21', 'insider_name': 'Hartree Partners, LP', 'insider_title': '10% owner', 'transaction_type': 'Open-market buy', 'shares': 2502.0, 'price': 5.1, 'value': 12760.2, 'is_buy': True}] reported transactions plotted over the window rather than listed, so concentration is visible.

Not available for HDSN today: no research case — nothing here has cleared the scoring threshold. Both appear on this page on their own if that changes.

A free account opens all of it.

Not financial advice. This page reports public filings and past research output. It is not a recommendation to buy or sell, and no price target here is a prediction. Trade at your own risk.