Insider Cluster (2 insiders) ·Filed May 19, 2026

UCTT

Ultra Clean Holdings, Inc.
NEUTRAL
Impact 3/10
Horizondays Processed4mo ago
Insider cluster: 2 insiders, $540K total
Actionable Insight • Neutral

Two UCTT insiders (General Counsel and CIO) collectively sold $540K in open-market sales over 8 days. At ~0.014% of the $3.9B market cap, the sales are trivial relative to company size and lack the strength of a cluster buy signal. However, all cross-filing audit rules fire as AMPLIFIERS, and the historical win rate on UCTT is mixed, with recent neutral calls seeing strong positive T+5 moves. The insider selling appears routine and likely liquidity-driven.

DirectionNeutral
Confidencehigh
Horizondays
Final — all horizons settled through T+60d
UCTT ▲ +20.69% at T+60d
NEUTRAL call ✓ call won +20.69% · α vs SPY +14.40% · entry $76.98 → $92.91
Entry anchored
May 18, 2026
via day open
T+1d
+4.21%
call +4.21% · α +3.17%
$80.22
settled 5mo ago
T+5d
+18.97%
call +18.97% · α +16.67%
$91.58
settled 4mo ago
T+20d
+44.99%
call +44.99% · α +44.00%
$111.61
settled 4mo ago
T+60d
+20.69%
call +20.69% · α +14.40%
$92.91
settled 7w ago

Price Chart

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Executive Summary

Two UCTT insiders (General Counsel and CIO) collectively sold $540K in open-market sales over 8 days. At ~0.014% of the $3.9B market cap, the sales are trivial relative to company size and lack the strength of a cluster buy signal. However, all cross-filing audit rules fire as AMPLIFIERS, and the historical win rate on UCTT is mixed, with recent neutral calls seeing strong positive T+5 moves. The insider selling appears routine and likely liquidity-driven.

Key Financial Metrics

Direction
selling
Total Value
$540.0K
Insiders
2

Financial Impact

Total insider selling of $540K vs. market cap of $3.9B — trivial at 0.014%

no financial impact

Risk Factors

  • Low insider conviction signal — these are not informative cluster sales per academic literature
  • Further negative news could emerge triggering more material insider selling

Market Snapshot

Exchange
Nasdaq
Sector
Semiconductors & Related Devices
Analyst Consensus
90% bullish (10 analysts)

Investment Themes

Semiconductors

Documents Analyzed

This report is based on 1 SEC document filed with EDGAR.

DocumentAccession Number
CLUSTER Data (Synthetic)cluster-UCTT-1779150821202
17 reports for UCTT
Performance horizon
100% Hit rate 3 of 3 directional calls best @ T+20▲ +21.83%Aug 14, 2026
Filters
Rows
Reports for UCTT — sortable, filterable
TypeNow
Aug 14, 2026
7w ago
8-K
BEARISH ★ 6/10
$84.93 $66.39▲ +21.83%▲ +19.84%$76.30 (+10.16%)
Aug 14, 2026
7w ago
424B5
BEARISH ★ 6/10
$84.93 $66.39▲ +21.83%▲ +19.84%$76.30 (+10.16%)
Aug 3, 2026
8w ago
Press Release
BULLISH ★ 8/10
$84.54 $65.11▼ −22.98%▼ −21.75%$76.30 (−9.75%)
Jun 9, 2026
16w ago
Insider Cluster
NEUTRAL ★ 2/10
$90.90 $106.19▲ +16.82%▲ +13.20%$76.30 (−16.06%)
Jun 9, 2026
16w ago
Insider Cluster
NEUTRAL ★ 2/10
$90.90 $106.19▲ +16.82%▲ +13.20%$76.30 (−16.06%)
Jun 8, 2026
16w ago
Insider Cluster
NEUTRAL ★ 2/10
$91.88 $90.78▼ −1.20%▼ −2.64%$76.30 (−16.96%)
Jun 4, 2026
17w ago
Insider Cluster
NEUTRAL ★ 2/10
$82.07 $105.53▲ +28.59%▲ +26.72%$76.30 (−7.03%)
May 27, 2026
18w ago
144
NEUTRAL ★ 2/10
$87.29 $118.82▲ +36.12%▲ +39.27%$76.30 (−12.59%)
May 19, 2026
19w ago
Insider Cluster
NEUTRAL ★ 3/10
$76.98 $111.61▲ +44.99%▲ +44.00%$76.30 (−0.88%)
May 1, 2026
21w ago
10-Q/A
NEUTRAL ★ 2/10
$73.11 $84.70▲ +15.85%▲ +10.21%$76.30 (+4.36%)
Showing 10 of 17

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Report published May 19, 2026