Insider Cluster (5 insiders) ·Filed May 15, 2026

ACLS

AXCELIS TECHNOLOGIES INC
NEUTRAL
Impact 4/10
Horizonweeks Processed4mo ago
Insider cluster: 5 insiders, $1.7M total
Actionable Insight • Neutral

The sell cluster is economically trivial relative to market cap and includes no C-suite executives (CEO/CFO not selling). This is consistent with routine diversification after equity vesting. The Veeco merger and flat-revenue guidance are the more relevant trading narratives. Monitor Q2 earnings in early August for order momentum in Memory/DRAM and any Veeco deal timeline updates.

DirectionNeutral
Confidencehigh
Horizonweeks
Final — all horizons settled through T+60d
ACLS ▼ -6.29% at T+60d
NEUTRAL call ✗ call lost -6.29% · α vs SPY -11.30% · entry $149.56 → $140.15
Entry anchored
May 19, 2026
via day open
T+1d
+1.97%
call +1.97% · α +1.78%
$152.51
settled 5mo ago
T+5d
+4.01%
call +4.01% · α +2.20%
$155.55
settled 4mo ago
T+20d
+25.39%
call +25.39% · α +24.65%
$187.53
settled 4mo ago
T+60d
-6.29%
call -6.29% · α -11.30%
$140.15
settled 7w ago

Price Chart

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Executive Summary

Five Axcelis insiders, including two EVPs and a VP, collectively sold ~$1.74M in stock over May 12-14, 2026, following a Q1 earnings release on May 7 that showed revenue up 3.3% YoY but GAAP EPS down 66% YoY ($0.30 vs $0.88) and guidance for flat 2026 revenue. Grants and tax-withholding transactions on May 15 are non-cash and not material to the sell signal. The sale cluster is modest at 0.04% of the $4.5B market cap, below materiality thresholds per academic literature, and is likely routine portfolio rebalancing after equity compensation vesting.

Key Financial Metrics

Direction
selling
Total Value
$1.7M
Insiders
5

Key Facts

  • Insider cluster of 5 open-market sellers (2 EVPs, 1 VP, 1 Director, 1 EVP) over May 12-14, total ~$1.74M sold at $160-$164/share
  • Q1 2026 revenue $199.0M (+3.3% YoY) but GAAP EPS dropped to $0.30 from $0.88 (-66% YoY); Non-GAAP EPS $0.72 vs $1.06 (-32% YoY)
  • Company guided Q2 2026 revenue ~$205M and non-GAAP EPS ~$0.90; 2026 revenue expected 'relatively flat' vs 2025
  • Merger with Veeco Instruments expected to close H2 2026 was announced Oct 2025
  • All 5 open-market sellers are non-C-suite (no CEO/CFO selling); ~$570M cash balance provides ample liquidity

Financial Impact

Total insider selling of ~$1.74M represents ~0.04% of the $4.5B market cap — a trivial amount that does not signal material insider bearishness

insider-sales-dollar-ratiomarket-cap-proportionality

Risk Factors

  • Flat 2026 revenue guidance with Power/Mature markets digestion could persist longer than guided
  • Veeco merger integration execution risk and potential shareholder dissent
  • Semiconductor equipment cycle cyclicality; tariff/trade policy risks on supply chain

Market Snapshot

Exchange
Nasdaq
Sector
Special Industry Machinery, NEC
Analyst Consensus
58% bullish (12 analysts)

Investment Themes

Industrials & Manufacturing

Documents Analyzed

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

DocumentAccession Number
CLUSTER Data (Synthetic)cluster-ACLS-1779224746392
11 reports for ACLS
Performance horizon
67% Hit rate 2 of 3 directional calls best @ T+60▲ +23.75%May 6, 2026
Filters
Rows
Reports for ACLS — sortable, filterable
TypeNow
Aug 9, 2026
7w ago
Institutional Cluster
BULLISH ★ 5/10
$132.65 $119.57▼ −9.86%▼ −8.95%$147.77 (+11.40%)
Jun 15, 2026
15w ago
Institutional Cluster
BULLISH ★ 6/10
$191.60 $136.56▼ −28.73%▼ −27.98%$147.77 (−22.88%)
Jun 4, 2026
17w ago
Insider Cluster
NEUTRAL ★ 3/10
$147.16 $139.97▼ −4.89%▼ −6.75%$147.77 (+0.41%)
May 28, 2026
18w ago
Insider Cluster
NEUTRAL ★ 3/10
$150.41 $176.13▲ +17.10%▲ +18.89%$147.77 (−1.76%)
May 26, 2026
18w ago
Insider Cluster
NEUTRAL ★ 3/10
$157.91 $180.70▲ +14.43%▲ +16.33%$147.77 (−6.42%)
May 22, 2026
19w ago
Insider Cluster
NEUTRAL ★ 2/10
$164.27 $167.14▲ +1.75%▲ +3.70%$147.77 (−10.04%)
May 21, 2026
19w ago
Insider Cluster
NEUTRAL ★ 3/10
$156.94 $172.13▲ +9.68%▲ +11.09%$147.77 (−5.84%)
May 15, 2026
20w ago
Insider Cluster
NEUTRAL ★ 4/10
$149.56 $187.53▲ +25.39%▲ +24.65%$147.77 (−1.20%)
May 15, 2026
20w ago
Insider Cluster
NEUTRAL ★ 3/10
$146.24 $176.85▲ +20.93%▲ +19.35%$147.77 (+1.05%)
May 15, 2026
20w ago
Insider Cluster
NEUTRAL ★ 2/10
$146.24 $176.85▲ +20.93%▲ +19.35%$147.77 (+1.05%)
Showing 10 of 11

US Market Status

Market Closed — Opens Mon (64h 16m)

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Report published May 19, 2026