AlphaOne Investment Services, LLC

Q1 2018 13F Holdings Report, Stock Holdings

Signature - Title: Donald O'Hara - Chief Operating Officer
Location: West Chester, PA
Holdings as of: March 31, 2018
Value $: $356M
Num holdings: 451
Date filed: 5/14/2018, 01:00 PM
Form type: 13F-HR
Description: All US holdings of this investor are reported in this report. Top holdings included IBM, ASGN, IVCRQ, NOVT, and EFSC.
Previous filing: Q4 2017 - Feb 12, 2018
Next filing: Q2 2018 - Aug 14, 2018
SEC: View on sec.gov
Options Holdings: Showing stock holdings, see here for options holdings

Sym	Weight	Trade Impact	Company	Class	Shares Change	Activity	Value Change $	Value $	* Price $	Shares	Principal
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* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.

Person Signing this Report on Behalf of Reporting Manager:

Name	Title	City, State	Date
Donald O'Hara	Chief Operating Officer	Villanova, Pennsylvania	5/11/2018