Impax Asset Management 13F-HR Quarterly holdings report by institutional manager

The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE

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COLUMN 1	COLUMN 2	COLUMN 3	COLUMN 4	COLUMN 5			COLUMN 6	COLUMN 7	COLUMN 8
			VALUE	SHRS OR	SH/	PUT/	INVESTMENT	OTHER	VOTING AUTHORITY
NAME OF ISSUER	TITLE OF CLASS	CUSIP	(x$1000)	PRN AMT	PRN	CALL	DISCRETION	MANAGER	SOLE	SHARED	NONE
3M Co.	COM	88579Y101	12,247	68,584	SH		SOLE		68,584	0	0
ARRIS International PLC	SHS	G0551A103	21,983	729,612	SH		SOLE		729,612	0	0
AT&T, Inc.	COM	00206R102	17,251	405,631	SH		DFND	1	405,631	0	0
Abbott Laboratories	COM	002824100	1,775	46,224	SH		SOLE		46,224	0	0
Accenture PLC, Class A	SHS CLASS A	G1151C101	484	4,130	SH		SOLE	1	4,130	0	0
Aetna, Inc.	COM	00817Y108	1,745	14,071	SH		SOLE	1	14,071	0	0
Alcoa Corp.	COM	013872106	1,404	49,999	SH		DFND	1	49,999	0	0
Alleghany Corp.	COM	017175100	25,953	42,678	SH		SOLE		42,678	0	0
Alphabet, Inc., Class A	CAP STK CL A	02079K305	20,213	25,507	SH		DFND	1	25,507	0	0
Alphabet, Inc., Class C	CAP STK CL C	02079K107	19,803	25,657	SH		DFND	1	25,657	0	0
Amazon.com, Inc.	COM	023135106	17,696	23,599	SH		SOLE		23,599	0	0
Amdocs, Ltd.	SHS	G02602103	4,495	77,172	SH		SOLE		77,172	0	0
American Electric Power Co., Inc.	COM	025537101	204	3,247	SH		SOLE	1	3,247	0	0
American Tower Corp., REIT	COM	03027X100	13,741	130,027	SH		SOLE		130,027	0	0
American Water Works Co., Inc.	COM	030420103	1,990	27,496	SH		SOLE	1	27,496	0	0
Antero Resources Corp.	COM	03674X106	29,320	1,239,726	SH		SOLE		1,239,726	0	0
Apple, Inc.	COM	037833100	34,518	298,028	SH		SOLE		298,028	0	0
Apptio, Inc.	CL A	03835c108	8,842	477,172	SH		SOLE		477,172	0	0
Aramark	COM	03852U106	2,679	75,000	SH		SOLE		75,000	0	0
Arconic, Inc.	COM	03965l100	1,916	103,333	SH		SOLE		103,333	0	0
Avnet, Inc.	COM	053807103	3,809	80,000	SH		SOLE		80,000	0	0
Bank of America Corp.	COM	060505104	20,050	907,240	SH		DFND	1	907,240	0	0
Bank of New York Mellon Corp., The	COM	064058100	17,127	361,478	SH		SOLE		361,478	0	0
Becton Dickinson & Co.	COM	075887109	303	1,831	SH		DFND	1	1,831	0	0
Beneficial Bancorp, Inc.	COM	08171T102	17,480	950,000	SH		SOLE		950,000	0	0
Berkshire Hathaway, Inc., Class B	CL B	084670702	25,105	154,036	SH		SOLE		154,036	0	0
Biogen, Inc.	COM	09062X103	14,873	52,446	SH		DFND	1	52,446	0	0
Bristol-Myers Squibb Co.	COM	110122108	643	10,996	SH		SOLE	1	10,996	0	0
Brookdale Senior Living, Inc.	COM	112463104	8,450	680,362	SH		SOLE		680,362	0	0
CVS Health Corp.	COM	126650100	558	7,067	SH		SOLE	1	7,067	0	0
Cabela's, Inc.	COM	126804301	22,502	384,315	SH		SOLE		384,315	0	0
Callidus Software, Inc.	COM	13123E500	8,652	515,000	SH		SOLE		515,000	0	0
Capitol Federal Financial, Inc.	COM	14057j101	29,054	1,765,113	SH		SOLE		1,765,113	0	0
Carter's, Inc.	COM	146229109	15,772	182,568	SH		SOLE		182,568	0	0
Celanese Corp., Series A	COM SER A	150870103	3,622	46,000	SH		DFND	1	46,000	0	0
Celgene Corp.	COM	151020104	14,397	124,378	SH		SOLE		124,378	0	0
Charles Schwab Corp., The	COM	808513105	15,734	398,620	SH		SOLE		398,620	0	0
Charter Financial Corp.	COM	16122W108	6,701	401,997	SH		SOLE		401,997	0	0
Check Point Software Technologies, Ltd.	ORD	m22465104	3,125	37,000	SH		SOLE		37,000	0	0
Chubb, Ltd.	COM	H1467J104	27,835	210,677	SH		SOLE		210,677	0	0
Cigna Corp.	COM	125509109	232	1,740	SH		SOLE	1	1,740	0	0
Cisco Systems, Inc.	COM	17275R102	11,868	392,709	SH		DFND	1	392,709	0	0
Citizens Financial Group, Inc.	COM	174610105	5,291	148,500	SH		DFND	1	148,500	0	0
Citrix Systems, Inc.	COM	177376100	3,572	40,000	SH		SOLE		40,000	0	0
Coca-Cola Co., The	COM	191216100	1,117	26,935	SH		SOLE	1	26,935	0	0
Colgate-Palmolive Co.	COM	194162103	369	5,632	SH		SOLE	1	5,632	0	0
Conagra Brands, Inc.	COM	205887102	2,769	70,000	SH		SOLE		70,000	0	0
Concho Resources, Inc.	COM	20605P101	4,171	31,459	SH		SOLE		31,459	0	0
ConocoPhillips	COM	20825C104	423	8,427	SH		DFND	1	8,427	0	0
Crown Castle International Corp., REIT	COM	22822V101	10,791	124,368	SH		SOLE		124,368	0	0
Cummins, Inc.	COM	231021106	237	1,735	SH		SOLE	1	1,735	0	0
Dominion Resources, Inc.	COM	25746U109	310	4,048	SH		SOLE	1	4,048	0	0
Duke Energy Corp.	COM	26441C204	357	4,603	SH		SOLE	1	4,603	0	0
EMCOR Group, Inc.	COM	29084Q100	15,666	221,400	SH		SOLE		221,400	0	0
EOG Resources, Inc.	COM	26875P101	14,280	141,248	SH		SOLE		141,248	0	0
EQT Corp.	COM	26884L109	3,465	52,989	SH		SOLE		52,989	0	0
Ecolab, Inc.	COM	278865100	9,668	82,477	SH		DFND	1	82,477	0	0
Eli Lilly & Co.	COM	532457108	485	6,595	SH		SOLE	1	6,595	0	0
Estee Lauder Cos, Inc., The, Class A	CL A	518439104	15,879	207,597	SH		DFND	1	207,597	0	0
Eversource Energy	COM	30040W108	14,014	253,735	SH		SOLE		253,735	0	0
ExlService Holdings, Inc.	COM	302081104	12,805	253,869	SH		SOLE		253,869	0	0
Expeditors Intl. of Washington, Inc.	COM	302130109	3,483	65,764	SH		SOLE		65,764	0	0
FBR & Co.	COM	30247C400	3,510	269,972	SH		SOLE		269,972	0	0
Facebook, Inc., Class A	CL A	30303M102	6,497	56,469	SH		DFND	1	56,469	0	0
First Republic Bank	COM	33616C100	9,805	106,415	SH		DFND	1	106,415	0	0
Forest City Realty Trust, Inc., REIT	CL A	345605109	2,673	128,253	SH		SOLE		128,253	0	0
Frontier Communications Corp.	COM	35906A108	121	35,752	SH		SOLE	1	35,752	0	0
General Mills, Inc.	COM	370334104	16,252	263,098	SH		DFND	1	263,098	0	0
Genpact, Ltd.	SHS	G3922B107	3,467	142,420	SH		SOLE		142,420	0	0
Gentex Corp.	COM	371901109	18,902	960,000	SH		SOLE		960,000	0	0
Genuine Parts Co.	COM	372460105	2,006	21,000	SH		DFND	1	21,000	0	0
Gilead Sciences, Inc.	COM	375558103	12,272	171,367	SH		SOLE		171,367	0	0
Goldman Sachs Group, Inc., The	COM	38141G104	20,018	83,601	SH		SOLE		83,601	0	0
HP, Inc.	COM	40434L105	170	11,429	SH		SOLE	1	11,429	0	0
Hologic, Inc.	COM	436440101	5,341	133,117	SH		DFND	1	133,117	0	0
Home Depot, Inc., The	COM	437076102	4,568	34,069	SH		DFND	1	34,069	0	0
HomeTrust Bancshares, Inc.	COM	437872104	19,861	766,839	SH		SOLE		766,839	0	0
IBM	COM	459200101	1,003	6,042	SH		SOLE	1	6,042	0	0
ICF International, Inc.	COM	44925C103	5,233	94,793	SH		SOLE		94,793	0	0
ICON PLC	SHS	G4705A100	19,244	255,908	SH		SOLE		255,908	0	0
ION Geophysical Corp.	COM	462044207	300	50,000	SH		SOLE		50,000	0	0
Ingersoll-Rand PLC	SHS	G47791101	17,858	237,978	SH		DFND	1	237,978	0	0
Ingredion, Inc.	COM	457187102	407	3,259	SH		SOLE	1	3,259	0	0
Integra LifeSciences Holdings Corp.	COM	457985208	17,525	204,278	SH		SOLE		204,278	0	0
Investors Bancorp, Inc.	COM	46146L101	31,184	2,235,435	SH		SOLE		2,235,435	0	0
JPMorgan Chase & Co.	COM	46625H100	7,509	87,018	SH		SOLE		87,018	0	0
Jamba, Inc.	COM	47023A309	6,695	650,000	SH		SOLE		650,000	0	0
Johnson & Johnson	COM	478160104	18,396	159,677	SH		DFND	1	159,677	0	0
Jones Lang LaSalle, Inc.	COM	48020Q107	2,408	23,835	SH		DFND	1	23,835	0	0
KLX, Inc.	COM	482539103	11,954	265,000	SH		SOLE		265,000	0	0
Kaiser Aluminum Corp.	COM PAR $0.01	483007704	13,680	176,081	SH		SOLE		176,081	0	0
Kearny Financial Corp/MD	COM	48716p108	15,861	1,020,000	SH		SOLE		1,020,000	0	0
Kellogg Co.	COM	487836108	1,524	20,681	SH		SOLE	1	20,681	0	0
Kimberly-Clark Corp.	COM	494368103	272	2,384	SH		SOLE	1	2,384	0	0
Korn/Ferry International	COM	500643200	16,844	572,347	SH		SOLE		572,347	0	0
Kroger Co., The	COM	501044101	206	5,956	SH		SOLE	1	5,956	0	0
Lamb Weston Holdings, Inc.	COM	513272104	2,019	53,333	SH		SOLE		53,333	0	0
Legg Mason, Inc.	COM	524901105	27,255	911,225	SH		SOLE		911,225	0	0
Ligand Pharmaceuticals, Inc.	COM	53220K504	14,535	143,049	SH		SOLE		143,049	0	0
Lincoln Electric Holdings, Inc.	COM	533900106	13,226	172,500	SH		SOLE		172,500	0	0
MRC Global, Inc.	COM	55345K103	20,969	1,035,000	SH		SOLE		1,035,000	0	0
MSCI, Inc.	COM	55354G100	273	3,466	SH		SOLE	1	3,466	0	0
Macy's, Inc.	COM	55616P104	1,243	34,700	SH		SOLE	1	34,700	0	0
Masco Corp.	COM	574599106	2,243	70,925	SH		SOLE		70,925	0	0
MasterCard, Inc., Class A	CL A	57636Q104	661	6,403	SH		SOLE	1	6,403	0	0
McKesson Corp.	COM	58155q103	219	1,562	SH		SOLE	1	1,562	0	0
Medtronic PLC	SHS	G5960L103	658	9,232	SH		SOLE	1	9,232	0	0
Merck & Co., Inc.	COM	58933Y105	17,935	304,652	SH		SOLE		304,652	0	0
Meridian Bancorp, Inc.	COM	58958U103	16,339	864,516	SH		SOLE		864,516	0	0
MetLife, Inc.	COM	59156R108	331	6,147	SH		SOLE	1	6,147	0	0
Metaldyne Performance Group, Inc.	COM	59116R107	5,896	256,907	SH		SOLE		256,907	0	0
Michael Kors Holdings, Ltd.	SHS	G60754101	496	11,550	SH		SOLE	1	11,550	0	0
Microsoft Corp.	COM	594918104	37,180	598,323	SH		DFND	1	598,323	0	0
Mohawk Industries, Inc.	COM	608190104	11,961	59,903	SH		SOLE		59,903	0	0
Molson Coors Brewing Co.	CL B	60871r209	9,160	94,133	SH		SOLE		94,133	0	0
Mondelez International, Inc., Class A	CL A	609207105	450	10,159	SH		SOLE	1	10,159	0	0
NIKE, Inc., Class B	CL B	654106103	2,184	42,973	SH		DFND	1	42,973	0	0
NN, Inc.	COM	629337106	8,001	420,000	SH		SOLE		420,000	0	0
Natus Medical, Inc.	COM	639050103	22,017	632,668	SH		SOLE		632,668	0	0
Netflix, Inc.	COM	64110L106	347	2,801	SH		SOLE	1	2,801	0	0
Newell Brands, Inc.	COM	651229106	4,179	93,588	SH		SOLE		93,588	0	0
Newmont Mining Corp.	COM	651639106	2,332	68,440	SH		DFND	1	68,440	0	0
ONE Gas, Inc.	COM	68235P108	3,714	58,070	SH		SOLE		58,070	0	0
Occidental Petroleum Corp.	COM	674599105	11,644	163,467	SH		DFND	1	163,467	0	0
Oshkosh Corp.	COM	688239201	10,651	164,850	SH		SOLE		164,850	0	0
PDC Energy, Inc.	COM	69327R101	17,641	243,055	SH		SOLE		243,055	0	0
PNC Financial Services Group, Inc.	COM	693475105	386	3,300	SH		SOLE	1	3,300	0	0
PayPal Holdings Inc	COM	70450Y103	3,158	80,000	SH		SOLE		80,000	0	0
PepsiCo, Inc.	COM	713448108	21,172	202,347	SH		DFND	1	202,347	0	0
Performance Food Group Co.	COM	71377A103	12,600	525,000	SH		SOLE		525,000	0	0
Phillips 66	COM	718546104	275	3,177	SH		SOLE	1	3,177	0	0
Physicians Realty Trust, REIT	COM	71943U104	10,428	550,000	SH		SOLE		550,000	0	0
Pioneer Natural Resources Co.	COM	723787107	19,134	106,256	SH		SOLE		106,256	0	0
Planet Fitness, Inc., Class A	CL A	72703H101	7,236	360,000	SH		SOLE		360,000	0	0
Procter & Gamble Co., The	COM	742718109	18,619	221,440	SH		DFND	1	221,440	0	0
Progress Software Corp.	COM	743312100	5,287	165,587	SH		SOLE		165,587	0	0
Prologis, Inc., REIT	COM	74340W103	3,062	58,000	SH		SOLE		58,000	0	0
Prudential Financial, Inc.	COM	744320102	306	2,940	SH		SOLE	1	2,940	0	0
QUALCOMM, Inc.	COM	747525103	16,739	256,727	SH		SOLE		256,727	0	0
Qorvo, Inc.	COM	74736k101	2,109	40,000	SH		SOLE		40,000	0	0
RenaissanceRe Holdings, Ltd.	COM	G7496G103	24,049	176,546	SH		SOLE		176,546	0	0
Robert Half International, Inc.	COM	770323103	1,463	30,000	SH		SOLE		30,000	0	0
Ross Stores, Inc.	COM	778296103	8,982	136,921	SH		SOLE		136,921	0	0
Ryman Hospitality Properties, Inc., REIT	COM	78377t107	10,712	170,000	SH		SOLE		170,000	0	0
Sally Beauty Holdings, Inc.	COM	79546E104	7,670	290,296	SH		SOLE		290,296	0	0
Schlumberger, Ltd.	COM	806857108	20,431	243,377	SH		SOLE		243,377	0	0
SemGroup Corp, Class A	CL A	81663A105	16,300	390,429	SH		SOLE		390,429	0	0
Stanley Black & Decker, Inc.	COM	854502101	18,021	157,131	SH		SOLE		157,131	0	0
Syntel, Inc.	COM	87162H103	6,932	350,296	SH		SOLE		350,296	0	0
TEGNA, Inc.	COM	87901j105	278	13,000	SH		SOLE	1	13,000	0	0
TJX Cos., Inc., The	COM	872540109	330	4,387	SH		SOLE	1	4,387	0	0
Target Corp.	COM	87612E106	267	3,700	SH		SOLE	1	3,700	0	0
Terreno Realty Corp., REIT	COM	88146M101	5,128	180,000	SH		SOLE		180,000	0	0
Texas Instruments, Inc.	COM	882508104	480	6,575	SH		SOLE	1	6,575	0	0
TheStreet, Inc.	COM	88368Q103	1,251	1,471,653	SH		SOLE		1,471,653	0	0
Thermo Fisher Scientific, Inc.	COM	883556102	16,301	115,527	SH		SOLE		115,527	0	0
Thermon Group Holdings, Inc.	COM	88362t103	12,122	635,000	SH		SOLE		635,000	0	0
Time Warner, Inc.	COM	887317303	22,048	228,401	SH		SOLE		228,401	0	0
Travelers Cos., Inc., The	COM	89417E109	244	1,996	SH		SOLE	1	1,996	0	0
U.S. Bancorp	COM	902973304	11,592	225,653	SH		DFND	1	225,653	0	0
US Foods Holding Corp.	COM	912008109	28,241	1,027,700	SH		SOLE		1,027,700	0	0
Ulta Salon Cosmetics & Fragrance, Inc.	COM	90384S303	719	2,820	SH		SOLE	1	2,820	0	0
United Parcel Service, Inc., Class B	CL B	911312106	13,793	120,320	SH		DFND	1	120,320	0	0
Unitil Corp.	COM	913259107	17,003	375,000	SH		SOLE		375,000	0	0
Verint Systems, Inc.	COM	92343X100	14,805	420,000	SH		SOLE		420,000	0	0
Verizon Communications, Inc.	COM	92343V104	1,423	26,663	SH		SOLE	1	26,663	0	0
Visa, Inc., Class A	COM CL A	92826C839	10,561	135,359	SH		DFND	1	135,359	0	0
WCI Communities, Inc.	COM PAR $0.01	92923C807	26,900	1,147,124	SH		SOLE		1,147,124	0	0
WESCO International, Inc.	COM	95082P105	13,976	210,000	SH		SOLE		210,000	0	0
Walgreens Boots Alliance, Inc.	COM	931427108	505	6,100	SH		SOLE	1	6,100	0	0
Walt Disney Co., The	COM DISNEY	254687106	7,757	74,432	SH		DFND	1	74,432	0	0
Waste Management, Inc.	COM	94106L109	22,459	316,727	SH		SOLE		316,727	0	0
Westell Technologies, Inc., Class A	CL A	957541105	1,018	1,565,681	SH		SOLE		1,565,681	0	0
Weyerhaeuser Co., REIT	COM	962166104	5,288	175,739	SH		DFND	1	175,739	0	0
White Mountains Insurance Group, Ltd.	COM	G9618E107	24,676	29,515	SH		SOLE		29,515	0	0
Whole Foods Market, Inc.	COM	966837106	7,110	231,151	SH		SOLE		231,151	0	0
Willis Towers Watson PLC	SHS	G96629103	1,949	15,935	SH		DFND	1	15,935	0	0
Xerox Corp.	COM	984121103	1,491	170,830	SH		SOLE	1	170,830	0	0
Yahoo!, Inc.	COM	984332106	1,902	49,174	SH		SOLE	1	49,174	0	0
Yum! Brands, Inc.	COM	988498101	4,341	68,544	SH		SOLE		68,544	0	0
Zoetis, Inc.	CL A	98978V103	16,985	317,304	SH		SOLE		317,304	0	0
salesforce.com, Inc.	COM	79466L302	2,020	29,500	SH		SOLE	1	29,500	0	0
iShares Core S&P 500 ETF	S&P 100 ETF	464287200	20,576	91,455	SH		DFND	1	91,455	0	0
iShares MSCI EAFE ETF	MSCI EAFE ETF	464287465	2,239	38,782	SH		DFND	1	38,782	0	0