Robert John Mahoney

CIK: 0002101601

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)2 (16.7%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)3 (25.0%)

Compensation grants

Other (G, F, J, C, D, …)7 (58.3%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

ACLS

AXCELIS TECHNOLOGIES INC

Officer

Discretionary Trading P&L

Holdings

Transaction History (12 total)

ACLS
AXCELIS TECHNOLOGIES INC
Jun 2, 2026
Sale(S)
Direct
1.2K shares at avg. $155.24$179K
ACLS
AXCELIS TECHNOLOGIES INC
May 18, 2026
Tax Payment(F)
Direct
182 shares at avg. $146.24$27K
ACLS
AXCELIS TECHNOLOGIES INC
May 18, 2026
Tax Payment(F)
Direct
130 shares at avg. $146.24$19K
ACLS
AXCELIS TECHNOLOGIES INC
May 15, 2026
Tax Payment(F)
Direct
372 shares at avg. $155.18$58K
ACLS
AXCELIS TECHNOLOGIES INC
May 15, 2026
Tax Payment(F)
Direct
173 shares at avg. $155.18$27K
ACLS
AXCELIS TECHNOLOGIES INC
May 15, 2026
Tax Payment(F)
Direct
61 shares at avg. $155.18$9K
ACLS
AXCELIS TECHNOLOGIES INC
May 15, 2026
Tax Payment(F)
Direct
170 shares at avg. $155.18$26K
ACLS
AXCELIS TECHNOLOGIES INC
May 15, 2026
Award(A)
Direct
1.9K shares-
ACLS
AXCELIS TECHNOLOGIES INC
May 15, 2026
Award(A)
Direct
1.9K shares-
ACLS
AXCELIS TECHNOLOGIES INC
May 12, 2026
Sale(S)
Direct
2.3K shares at avg. $161.00$364K
ACLS
AXCELIS TECHNOLOGIES INC
Mar 2, 2026
Tax Payment(F)
Direct
573 shares at avg. $86.58$50K
ACLS
AXCELIS TECHNOLOGIES INC
Jan 15, 2026
Award(A)
Direct
1.7K shares-

		Type	Shares	Price		Ownership
Jun 2, 2026	ACLS AXCELIS TECHNOLOGIES INC	Sale(S)	1,155	$155.24	$179,302	Direct
May 18, 2026	ACLS AXCELIS TECHNOLOGIES INC	Tax Payment(F)	182	$146.24	$26,616	Direct
May 18, 2026	ACLS AXCELIS TECHNOLOGIES INC	Tax Payment(F)	130	$146.24	$19,011	Direct
May 15, 2026	ACLS AXCELIS TECHNOLOGIES INC	Tax Payment(F)	372	$155.18	$57,727	Direct
May 15, 2026	ACLS AXCELIS TECHNOLOGIES INC	Tax Payment(F)	173	$155.18	$26,846	Direct
May 15, 2026	ACLS AXCELIS TECHNOLOGIES INC	Tax Payment(F)	61	$155.18	$9,466	Direct
May 15, 2026	ACLS AXCELIS TECHNOLOGIES INC	Tax Payment(F)	170	$155.18	$26,381	Direct
May 15, 2026	ACLS AXCELIS TECHNOLOGIES INC	Award(A)	1,947	-	$0	Direct
May 15, 2026	ACLS AXCELIS TECHNOLOGIES INC	Award(A)	1,947	-	$0	Direct
May 12, 2026	ACLS AXCELIS TECHNOLOGIES INC	Sale(S)	2,258	$161.00	$363,538	Direct
Mar 2, 2026	ACLS AXCELIS TECHNOLOGIES INC	Tax Payment(F)	573	$86.58	$49,610	Direct
Jan 15, 2026	ACLS AXCELIS TECHNOLOGIES INC	Award(A)	1,734	-	$0	Direct

1-12 of 12 transactions

About Mahoney Robert John

Mahoney Robert John (SEC CIK 0002101601) files insider reports with the SEC as EVP Global Operations of AXCELIS TECHNOLOGIES INC (ACLS).

Signal8 holds 7 ownership filings by Mahoney Robert John (1 Form 3, 6 Form 4), filed between Dec 22, 2025 and Jun 3, 2026. Those filings report 12 transactions, from Jan 15, 2026 to Jun 2, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Mahoney Robert John's filings is in BEVERLY, MA.

Recent filings by Mahoney Robert John

Jun 2, 2026: Open-market sale of ACLS shares (Form 4, code S).
May 18, 2026: Tax withholdings of ACLS shares (2 lines, Form 4, code F).
May 15, 2026: Tax withholdings of ACLS shares (4 lines, Form 4, code F).
May 15, 2026: Grants or awards of ACLS shares (2 lines, Form 4, code A).
May 12, 2026: Open-market sale of ACLS shares (Form 4, code S).

Other insiders filing for AXCELIS TECHNOLOGIES INC (ACLS)

Redinbo Greg, EVP and Chief Strategy Officer
Tatnall Christopher, EVP Global Customer Operations
Ryzhik David, SVP Interim CFO
Blumenstock Gerald M, EVP, Research, Dev. & Eng.
Sayiner Necip, Director
Sutton Todd, VP Corporate Controller

How to read Form 4 transaction codes