AXCELIS TECHNOLOGIES INC — Director's Dealing 2017

May 12, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AXCELIS TECHNOLOGIES INC (ACLS)
CIK: 0001113232
Period of Report: 2017-05-09

Reporting Person: Bintz William J (EVP, Product Development)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-05-09	Common Stock	M	35250	$6.40	Acquired	78417	Direct
2017-05-09	Common Stock	M	25992	$6.40	Acquired	104409	Direct
2017-05-09	Common Stock	M	2331	$7.20	Acquired	106740	Direct
2017-05-09	Common Stock	S	63573	$21.07	Disposed	43167	Direct
2017-05-10	Common Stock	M	22669	$7.20	Acquired	65836	Direct
2017-05-10	Common Stock	S	22669	$21.00	Disposed	43167	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-05-09	Stock Option (right to buy)	$6.40	M	35250	Disposed	2020-07-15	Common Stock (35250)	Direct
2017-05-09	Stock option (right to buy)	$6.40	M	25992	Disposed	2021-07-15	Common Stock (25992)	Direct
2017-05-09	Stock option (right to buy)	$7.20	M	2331	Disposed	2021-07-15	Common Stock (2331)	Direct
2017-05-10	Stock option (right to buy)	$7.20	M	22669	Disposed	2021-07-15	Common Stock (22669)	Direct

Footnotes

F1: Of the shares held as of May 9 and May 10, 2017, 20,455 were issuable on vesting of restricted stock units granted under the 2012 Equity Incentive Plan and are subject to forefeiture.

F2: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $21.00 to $21.65, inclusive. The reporting person undertakes to provide to Axcelis Technologies, Inc., any security holder of Axcelis Technologies, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price.

F3: 50,000 options were granted on July 15, 2014 and were vested as to 50% of the options as of May 9, 2017. Of the remaining 47,669 options held by the executive after the sales on that date,22,669 were vested, and 12,500 will vest on each of July 15, 2017 and July 15, 2018, if the officer remains in the service of the Company on such vesting dates.

F4: 50,000 options were granted on July 15, 2014 and were vested as to 50% of the options as of May 10, 2017. Of the remaining 25,000 options held by the executive after the sales on that date, 12,500 will vest on each of July 15, 2017 and July 15, 2018, if the officer remains in the service of the Company on such vesting dates.