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Institutional Investment Manager
AlphaOne Investment Services, LLC
AlphaOne Investment Services, LLC (CIK: 0001482390) incorporated in Delaware, located at 158 W. Gay Street, Suite 300, West Chester, PA. Institutional holdings reported to the SEC.

Institutional Holdings (2015Q1)
Portfolio Summary: 91 holdings with a total value of $266,208,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 WESTERN DIGITAL CORP 77,800 7,081,000 2.66%
2 SUPERNUS PHARMACEUTICALS INC COM 558,961 6,758,000 2.54%
3 APPLE INC 52,910 6,584,000 2.47%
4 AMAG PHARMACEUTICALS INC COM 113,691 6,214,000 2.33%
5 CAMBREX CORP 154,563 6,125,000 2.30%
6 GTT COMMUNICATIONS INC COM 303,521 5,730,000 2.15%
7 NATUS MEDICAL INC. 138,462 5,465,000 2.05%
8 Knight Transportation Inc 164,845 5,316,000 2.00%
9 VASCULAR SOLUTIONS INC COM 173,577 5,263,000 1.98%
10 VIRTUSA CORPORATION 124,546 5,154,000 1.94%
11 U S PHYSICAL THERAPY COM 104,725 4,974,000 1.87%
12 OLD DOMINION FREIGHT LINE IN 62,796 4,854,000 1.82%
13 RENASANT CORP 156,084 4,690,000 1.76%
14 RINGCENTRAL INC 298,370 4,574,000 1.72%
15 SUNPOWER CORP 144,900 4,537,000 1.70%
16 Francesca's Holdings Corp 246,444 4,387,000 1.65%
17 INVACARE CORP COM 218,950 4,250,000 1.60%
18 RED ROBIN GOURMET BURGERS INC COM 48,396 4,210,000 1.58%
19 BANNER CORP COM NEW 90,187 4,140,000 1.56%
20 KADANT INC 78,355 4,122,000 1.55%
21 FEDERAL SIGNAL CORP COM 260,726 4,117,000 1.55%
22 VITESSE SEMICONDUCTOR CORP 764,290 4,058,000 1.52%
23 Enterprise Finl Svcs Corp 190,952 3,945,000 1.48%
24 NN Inc Com 156,920 3,936,000 1.48%
25 COLUMBIA BKG SYS INC COM 134,607 3,900,000 1.47%
26 KIRKLANDS INC COM 164,210 3,900,000 1.47%
27 CALAMP CORP 238,857 3,867,000 1.45%
28 Bryn Mawr Bk Corp 125,727 3,823,000 1.44%
29 FINANCIAL INSTITUTIONS INC 165,948 3,805,000 1.43%
30 MULTI COLOR CORP COM 54,315 3,766,000 1.41%
31 AMC NETWORKS INC CL A 47,900 3,671,000 1.38%
32 GP Strategies Corp 99,202 3,670,000 1.38%
33 PACWEST BANCORP DEL COM 75,840 3,556,000 1.34%
34 HANMI FINL CORP COM NEW 164,854 3,487,000 1.31%
35 WSFS Financial Corp 46,099 3,486,000 1.31%
36 AZZ INC COM 74,731 3,482,000 1.31%
37 CRA INTL INC COM 110,087 3,426,000 1.29%
38 HURCO COMPANIES INC 101,899 3,356,000 1.26%
39 METHODE ELECTRS INC COM 70,164 3,301,000 1.24%
40 Park Sterling Corp 447,847 3,180,000 1.19%
41 HERITAGE FINL CORP WASH COM 186,928 3,178,000 1.19%
42 STERLING BANCORP DEL COM 233,900 3,137,000 1.18%
43 CECO ENVIRONMENTAL CORP 289,140 3,068,000 1.15%
44 PDF SOLUTIONS INC COM 167,218 2,997,000 1.13%
45 FACEBOOK INC 36,200 2,976,000 1.12%
46 DEL FRISCOS RESTAURANT GROUP COM 144,150 2,905,000 1.09%
47 YAHOO INC 65,300 2,902,000 1.09%
48 Pandora Media Inc 177,200 2,872,000 1.08%
49 FOSTER L B CO CL A 60,041 2,851,000 1.07%
50 PACIFIC CONTINENTAL CORP 209,700 2,772,000 1.04%
Page 1 of 2

Portfolio data is normalized using SEC Form 13F filings, including the Restatement filing (0001140361-15-025111, filed 2015.06.23).

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.