Insider Buy ·Filed Sep 28, 2026
Insider cluster: 1 insiders, $673K total
Actionable Insight ▲ Bullish
Monitor for any subsequent 13D filing or operational catalyst that could explain the timing.
Latest settled — T+5d
HDSN ▲ +3.11% at T+5d
LONG call ✓ call won +3.11% · α vs SPY +1.16% · entry $5.15 → $5.31
Latest observation: T+18 +10.52% FF3 residual α
T+1d
0.00%
call 0.00% · α +0.21%
$5.15
settled 26d ago
T+5d
+3.11%
call +3.11% · α +1.16%
$5.31
settled 20d ago
T+20d
Pending
in 14h
T+60d
Pending
in 8w
Price Chart
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Executive Summary
Hartree Partners, LP, a 10% owner of Hudson Technologies, made three open-market purchases totaling ~$673K over four days, including a $604K buy on September 24. The purchase is modest relative to the company's market cap (~$326M), representing ~0.21%.
Key Financial Metrics
Direction
buying
Total Value
$673.0K
Insiders
1
Key Facts
- Hartree Partners, LP (10% owner) purchased 132,000 shares total over three days: 2,500 on Sep 21, 11,013 on Sep 23, and 118,500 on Sep 24.
- Total purchase value is approximately $673,000, all at ~$5.10 per share.
- The purchase represents about 0.21% of HDSN's market cap (~$326M).
- This is a standalone open-market buy by a 10% owner exceeding $100K, triggering the officer/10%-owner open-market buy rule (bullish, impactScore ≥4).
Financial Impact
~$673K insider purchase by 10% owner, ~0.21% of market cap
ownership concentration
Risk Factors
- The purchase is modest relative to market cap (0.21%), limiting its signaling power.
- No accompanying operational catalyst or guidance change is evident from this filing alone.
Investment Themes
Industrials & Manufacturing
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| INSIDER-BUY Data (Synthetic) | 0000921895-26-002658 |
19 reports for HDSN
57% Hit rate @ T+5 Went positive at some point 6 of 7 best @ T+60▲ +18.96%
Filters
Rows
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 28, 2026 28d ago | Insider Buy | $5.15 $5.31 | ▲ +3.11% | ▲ +1.16% | $5.24 (+1.75%) |
Sep 23, 2026 4w ago | Insider Buy | $5.23 $5.25 | ▲ +0.38% | ▲ +0.80% | $5.24 (+0.19%) |
Sep 18, 2026 5w ago | Insider Buy | $5.19 $5.10 | ▼ −1.73% | ▼ −0.71% | $5.24 (+0.96%) |
Sep 17, 2026 5w ago | Press Release | $5.17 $5.16 | ▼ −0.19% | ▼ −1.46% | $5.24 (+1.35%) |
Aug 26, 2026 8w ago | Insider Buy | $5.48 $5.25 | ▼ −4.20% | ▼ −4.47% | $5.24 (−4.38%) |
Jul 31, 2026 12w ago | Insider Buy | $6.23 $5.70 | ▼ −8.51% | ▼ −10.53% | $5.24 (−15.89%) |
Jul 22, 2026 13w ago | Insider Buy | $6.33 $5.80 | ▼ −8.37% | ▼ −8.85% | $5.24 (−17.22%) |
Jul 8, 2026 15w ago | Insider Buy | $6.41 $6.31 | ▼ −1.56% | ▼ −1.43% | $5.24 (−18.25%) |
Jul 2, 2026 16w ago | Insider Buy | $5.99 $6.41 | ▲ +7.01% | ▲ +6.08% | $5.24 (−12.52%) |
May 21, 2026 22w ago | Insider Cluster | $5.17 $5.37 | ▲ +3.87% | ▲ +2.27% | $5.24 (+1.35%) |
Showing 10 of 19
US Market Status
Market Closed — Opens Tue (< 1m)
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