Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-19 · Built: 2026-10-19 · 中文

← United States · Coverage record

US · SEC FORM 4

AXCELIS TECHNOLOGIES INC

ACLS · Nasdaq · CIK 0001113232 · Technology · Semiconductor Equipment & Materials

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

65 Form 4 transaction lines observed in the same window
18 sales · 47 option, withholding, award, gift or other lines

Last qualifying purchase2024-03-11 · Low Russell · $49.5K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesHigh
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Mahoney Robert JohnEVP Global Operations
▼○○○▼
Redinbo GregEVP MARKETING AND APPLICATIONS
▼○○○○
Low RussellPRESIDENT AND CEO
▼▼○○○
Ryzhik DavidSVP Interim CFO
○○○○
Sutton ToddVP Corporate Controller
○○○▼
Tatnall ChristopherEVP Global Customer Operations
○○▼○
● Purchase▼ Sale○ Other

Showing the six most active owners; 8 additional owner(s) remain in Form 4 evidence.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2024-03-11 · Low Russell.

Recent Form 4 activity

0Purchases
23Sales
56Other Form 4 lines
55SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING18 sale line(s) · context only
OTHER47 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M
+33.4%
3M
+5.6%
6M
+55.4%
12M
—

Volatility & liquidity

Volatility
68.1%
Beta
—
Avg daily value
—

Valuation

Market cap
—
P/E
—

Fundamentals

Profit margin
14.3%
ROE
11.6%
Industry
Semiconductor Equipment & Materials

Market data

Price data up to: 2026-10-04 · Price source: OpenBB/yfinance · From SEC filings: Profit margin, ROE · Fiscal year ended: 2025-12-31 · Status: PASS

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
1,439,547
Previous report
1,434,982
Avg daily volume
378,497
Days to cover
3.8

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2024-03-11Low RussellPurchase (P)Common Stock440USD 112.39USD 49,452SEC filing ↗
2024-02-29COOGAN JAMES GORDONPurchase (P)Common Stock100USD 112.23USD 11,223SEC filing ↗
2024-02-23Lawson Douglas A.Purchase (P)Common Stock500USD 111.04USD 55,520SEC filing ↗

Form 4 evidence

79 transaction lines in the latest 365-day window; 574 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-15Tatnall ChristopherTax withholding (F)Common Stock136USD 105.04USD 14,285SEC filing ↗
2026-09-15Redinbo GregTax withholding (F)Common Stock208USD 105.04USD 21,848SEC filing ↗
2026-07-15Ryzhik DavidTax withholding (F)Common Stock221USD 145.01USD 32,047SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-15Tatnall ChristopherTax withholding (F)Common Stock136USD 105.04USD 14,285SEC filing ↗
2026-09-15Redinbo GregTax withholding (F)Common Stock208USD 105.04USD 21,848SEC filing ↗
2026-07-15Ryzhik DavidTax withholding (F)Common Stock221USD 145.01USD 32,047SEC filing ↗
2026-06-16Ryzhik DavidTax withholding (F)Common Stock76USD 176.85USD 13,441SEC filing ↗
2026-06-15Blumenstock Gerald MTax withholding (F)Common Stock506USD 191.60USD 96,950SEC filing ↗
2026-06-03Sayiner NecipSale (S)Common Stock1,586USD 157.44USD 249,700SEC filing ↗
2026-06-02Mahoney Robert JohnSale (S)Common Stock1,155USD 155.24USD 179,302SEC filing ↗
2026-05-27Sutton ToddSale (S)Common Stock2,000USD 159.99USD 319,980SEC filing ↗
2026-05-22St Dennis ThomasSale (S)Common Stock900USD 155.37USD 139,833SEC filing ↗
2026-05-22Evans EileenSale (S)Common Stock926USD 155.51USD 144,002SEC filing ↗
2026-05-21Blumenstock Gerald MSale (S)Common Stock1,161USD 152.70USD 177,285SEC filing ↗
2026-05-20Tatnall ChristopherSale (S)Common Stock1,166USD 149.75USD 174,608SEC filing ↗
2026-05-19Quirk JeanneSale (S)Common Stock1,789USD 140.22USD 250,854SEC filing ↗
2026-05-19KURTZWEIL JOHN TSale (S)Common Stock3,500USD 138.79USD 485,765SEC filing ↗
2026-05-19GRAVES GREGORY BSale (S)Common Stock3,225USD 141.61USD 456,707SEC filing ↗
2026-05-18Sutton ToddTax withholding (F)Common Stock184USD 146.24USD 26,908SEC filing ↗
2026-05-18Redinbo GregTax withholding (F)Common Stock190USD 146.24USD 27,786SEC filing ↗
2026-05-18Mahoney Robert JohnTax withholding (F)Common Stock312USD 146.24USD 45,627SEC filing ↗
2026-05-18Low RussellTax withholding (F)Common Stock711USD 146.24USD 103,977SEC filing ↗
2026-05-15Tatnall ChristopherTax withholding (F)Common Stock1,259USD 155.18USD 195,372SEC filing ↗
2026-05-15Tatnall ChristopherAward / grant (A)Common Stock3,504USD 0.00USD 0SEC filing ↗
2026-05-15Sutton ToddTax withholding (F)Common Stock441USD 155.18USD 68,434SEC filing ↗
2026-05-15Sutton ToddAward / grant (A)Common Stock1,168USD 0.00USD 0SEC filing ↗
2026-05-15Ryzhik DavidTax withholding (F)Common Stock226USD 155.18USD 35,071SEC filing ↗
2026-05-15Ryzhik DavidAward / grant (A)Common Stock3,115USD 0.00USD 0SEC filing ↗
2026-05-15Redinbo GregTax withholding (F)Common Stock839USD 155.18USD 130,196SEC filing ↗
2026-05-15Redinbo GregAward / grant (A)Common Stock3,115USD 0.00USD 0SEC filing ↗
2026-05-15Mahoney Robert JohnTax withholding (F)Common Stock776USD 155.18USD 120,420SEC filing ↗
2026-05-15Mahoney Robert JohnAward / grant (A)Common Stock1,947USD 0.00USD 0SEC filing ↗
2026-05-15Low RussellTax withholding (F)Common Stock6,891USD 155.18USD 1,069,345SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-19
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerACLS
CIK0001113232
SectorTechnology
IndustrySemiconductor Equipment & Materials Yahoo Finance
SEC SIC3559 Special Industry Machinery, NEC
ExchangeNasdaq

Data coverage

Local Form 4 history574 transaction lines from 2020-02-10 to 2026-09-15
3 P purchase lines · 170 S sale lines · 401 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-19. Mapping status is an audit field and does not erase SEC filing evidence.