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
Agilent Technologies, Inc.	COM	00846U101	10,591	185,198	SH		SOLE	0	185,198	0	0
Apple, Inc.	COM	037833100	48,567	86,555	SH		SOLE	0	86,555	0	0
ABB, Ltd., ADR	SPONSORED ADR	000375204	17,084	643,227	SH		SOLE	0	643,227	0	0
Abbott Laboratories	COM	002824100	2,800	73,061	SH		SOLE	0	73,061	0	0
ACE, Ltd.	SHS	H0023R105	2,107	20,350	SH		SOLE	0	20,350	0	0
Autodesk, Inc.	COM	052769106	385	7,650	SH		SOLE	0	7,650	0	0
Allergan, Inc.	COM	018490102	655	5,900	SH		SOLE	0	5,900	0	0
Alexion Pharmaceuticals, Inc.	COM	015351109	1,339	10,062	SH		SOLE	0	10,062	0	0
American Tower Corp., REIT	COM	03027X100	20,390	255,450	SH		SOLE	0	255,450	0	0
Amazon.com, Inc.	COM	023135106	2,256	5,656	SH		SOLE	0	5,656	0	0
Ares Capital Corp.	COM	04010L103	1,510	85,000	SH		SOLE	0	85,000	0	0
ARM Holdings PLC, ADR	SPONSORED ADR	042068106	575	10,500	SH		SOLE	0	10,500	0	0
Aruba Networks, Inc.	COM	043176106	1,077	60,142	SH		SOLE	0	60,142	0	0
ASML Holding NV	N Y REGISTRY SHS	N07059210	2,282	24,350	SH		SOLE	0	24,350	0	0
Atwood Oceanics, Inc.	COM	050095108	1,602	30,000	SH		SOLE	0	30,000	0	0
American Water Works Co., Inc.	NEW COM	030420103	2,553	60,415	SH		SOLE	0	60,415	0	0
American Express Co.	COM	025816109	30,857	340,100	SH		SOLE	0	340,100	0	0
AstraZeneca PLC, ADR	SPONSORED ADR	046353108	1,627	27,400	SH		SOLE	0	27,400	0	0
Natus Medical, Inc.	COM	639050103	634	28,186	SH		SOLE	0	28,186	0	0
Becton Dickinson & Co.	COM	075887109	48,453	438,530	SH		SOLE	0	438,530	0	0
Baker Hughes, Inc.	COM	057224107	26,578	480,967	SH		SOLE	0	480,967	0	0
Bank of New York Mellon Corp.,	COM	064058100	21,942	628,000	SH		SOLE	0	628,000	0	0
BlackRock, Inc.	COM	09247X101	35,603	112,500	SH		SOLE	0	112,500	0	0
Bob Evans Farms, Inc.	COM	096761101	1,619	32,000	SH		SOLE	0	32,000	0	0
BorgWarner, Inc.	COM	099724106	29,054	519,656	SH		SOLE	0	519,656	0	0
Brown Shoe Co., Inc.	COM NEW	115736100	439	15,600	SH		SOLE	0	15,600	0	0
CBRE Group, Inc., Class A	CL A	12504L109	1,879	71,437	SH		SOLE	0	71,437	0	0
Cape Bancorp, Inc.	COM	139209100	380	37,408	SH		SOLE	0	37,408	0	0
Chicopee Bancorp, Inc.	COM	168565109	1,749	100,458	SH		SOLE	0	100,458	0	0
Cubist Pharmaceuticals, Inc.	COM	229678107	1,399	20,320	SH		SOLE	0	20,320	0	0
Calgon Carbon Corp.	COM	129603106	1,234	60,000	SH		SOLE	0	60,000	0	0
Celgene Corp.	COM	151020104	19,505	115,442	SH		SOLE	0	115,442	0	0
Capitol Federal Financial, Inc	COM	14057j101	1,928	159,206	SH		SOLE	0	159,206	0	0
Colgate-Palmolive Co.	COM	194162103	7,825	120,000	SH		SOLE	0	120,000	0	0
Cummins, Inc.	COM	231021106	22,737	161,287	SH		SOLE	0	161,287	0	0
Cinemark Holdings, Inc.	COM	17243V102	2,147	64,403	SH		SOLE	0	64,403	0	0
CenterPoint Energy, Inc.	COM	15189T107	8,463	365,100	SH		SOLE	0	365,100	0	0
Computer Programs & Systems, I	COM	205306103	618	10,000	SH		SOLE	0	10,000	0	0
Compuware Corp.	COM	205638109	2,226	198,550	SH		SOLE	0	198,550	0	0
Salesforce.com, Inc.	COM	79466L302	2,215	40,132	SH		SOLE	0	40,132	0	0
Cisco Systems, Inc.	COM	17275R102	205	9,143	SH		SOLE	0	9,143	0	0
CSX Corp.	COM	126408103	13,642	474,167	SH		SOLE	0	474,167	0	0
Cognizant Technology Solutions	CL A	192446102	23,286	230,603	SH		SOLE	0	230,603	0	0
EI du Pont de Nemours & Co.	COM	263534109	30,533	469,961	SH		SOLE	0	469,961	0	0
Destination Maternity Corp.	COM	25065D100	469	15,711	SH		SOLE	0	15,711	0	0
Discover Financial Services	COM	254709108	10,910	195,000	SH		SOLE	0	195,000	0	0
Amdocs, Ltd.	ORD	G02602103	13,464	326,475	SH		SOLE	0	326,475	0	0
Dresser-Rand Group, Inc.	COM	261608103	15,122	253,600	SH		SOLE	0	253,600	0	0
DirecTV	COM	25490A309	33,820	489,500	SH		SOLE	0	489,500	0	0
Devon Energy Corp.	COM NEW	25179M103	1,641	26,529	SH		SOLE	0	26,529	0	0
eBay, Inc.	COM	278642103	2,142	39,028	SH		SOLE	0	39,028	0	0
Ecolab, Inc.	COM	278865100	6,256	60,000	SH		SOLE	0	60,000	0	0
Estee Lauder Cos, Inc., Class	CL A	518439104	13,242	175,812	SH		SOLE	0	175,812	0	0
EMC Corp.	COM	268648102	11,512	457,730	SH		SOLE	0	457,730	0	0
Emerson Electric Co.	COM	291011104	22,214	316,534	SH		SOLE	0	316,534	0	0
Epiq Systems, Inc.	COM	26882D109	811	50,000	SH		SOLE	0	50,000	0	0
EQT Corp.	COM	26884L109	24,735	275,506	SH		SOLE	0	275,506	0	0
Express Scripts Holding Co.	COM	30219G108	12,722	181,124	SH		SOLE	0	181,124	0	0
Ensco PLC, Class A	SHS CLASS A	G3157S106	21,294	372,398	SH		SOLE	0	372,398	0	0
Eaton Corp PLC	SHS	G29183103	18,387	241,552	SH		SOLE	0	241,552	0	0
Evolving Systems, Inc.	COM NEW	30049R209	254	26,085	SH		SOLE	0	26,085	0	0
Expeditors Int. of Washington,	COM	302130109	2,327	52,596	SH		SOLE	0	52,596	0	0
Ford Motor Co.	COM PAR $0.01	345370860	26,459	1,714,755	SH		SOLE	0	1,714,755	0	0
Facebook, Inc., Class A	CLA	30303M102	6,403	117,141	SH		SOLE	0	117,141	0	0
Fox Chase Bancorp, Inc.	COM NEW	35137T108	793	45,610	SH		SOLE	0	45,610	0	0
Gannett Co., Inc.	COM	364730101	2,100	71,000	SH		SOLE	0	71,000	0	0
Gilead Sciences, Inc.	COM	375558103	25,430	338,387	SH		SOLE	0	338,387	0	0
General Mills, Inc.	COM	370334104	3,767	75,484	SH		SOLE	0	75,484	0	0
Generac Holdings, Inc.	COM	368736104	566	10,000	SH		SOLE	0	10,000	0	0
Google, Inc., Class A	CLA	38259P508	30,623	27,325	SH		SOLE	0	27,325	0	0
Goldman Sachs Group, Inc., The	COM	38141G104	12,851	72,500	SH		SOLE	0	72,500	0	0
Hampden Bancorp, Inc.	COM	40867E107	695	42,336	SH		SOLE	0	42,336	0	0
Hawaiian Electric Industries,	COM	419870100	912	35,000	SH		SOLE	0	35,000	0	0
Honda Motor Co., Ltd., ADR	AMERN SHS	438128308	1,571	38,000	SH		SOLE	0	38,000	0	0
Hologic, Inc.	COM	436440101	1,531	68,500	SH		SOLE	0	68,500	0	0
Starwood Hotels & Resorts Worl	COM	85590A401	604	7,600	SH		SOLE	0	7,600	0	0
HeartWare International, Inc.	COM	422368100	1,373	14,613	SH		SOLE	0	14,613	0	0
IBM	COM	459200101	4,349	23,185	SH		SOLE	0	23,185	0	0
ICU Medical, Inc.	COM	44930G107	637	10,000	SH		SOLE	0	10,000	0	0
Ingram Micro Inc., Class A	CLA	457153104	282	12,000	SH		SOLE	0	12,000	0	0
Intel Corp.	COM	458140100	18,172	700,000	SH		SOLE	0	700,000	0	0
Intuit, Inc.	COM	461202103	3,371	44,173	SH		SOLE	0	44,173	0	0
JetBlue Airways Corp.	COM	477143101	855	100,000	SH		SOLE	0	100,000	0	0
Johnson Controls, Inc.	COM	478366107	857	16,700	SH		SOLE	0	16,700	0	0
Jamba, Inc.	COM NEW	47023A309	1,119	90,000	SH		SOLE	0	90,000	0	0
Jos A Bank Clothiers, Inc.	COM	480838101	1,095	20,000	SH		SOLE	0	20,000	0	0
JPMorgan Chase & Co.	COM	46625H100	23,201	396,742	SH		SOLE	0	396,742	0	0
Michael Kors Holdings, Ltd.	SHS	G60754101	20,975	258,344	SH		SOLE	0	258,344	0	0
Laboratory Corp of America Hol	COM NEW	50540R409	1,132	12,390	SH		SOLE	0	12,390	0	0
Legg Mason, Inc.	COM	524901105	870	20,000	SH		SOLE	0	20,000	0	0
Landstar System, Inc.	COM	515098101	1,728	30,078	SH		SOLE	0	30,078	0	0
Macy's, Inc.	COM	55616P104	2,291	42,894	SH		SOLE	0	42,894	0	0
MasterCard, Inc., Class A	CLA	57636Q104	6,542	7,830	SH		SOLE	0	7,830	0	0
Marriott International, Inc.,	NEW CL A	571903202	2,709	54,886	SH		SOLE	0	54,886	0	0
MICROS Systems, Inc.	COM	594901100	574	10,000	SH		SOLE	0	10,000	0	0
Mead Johnson Nutrition Co.	COM	582839106	6,701	80,000	SH		SOLE	0	80,000	0	0
3M Co.	COM	88579Y101	4,676	33,341	SH		SOLE	0	33,341	0	0
Morgan Stanley	COM NEW	617446448	36,387	1,160,300	SH		SOLE	0	1,160,300	0	0
Microsoft Corp.	COM	594918104	24,686	659,512	SH		SOLE	0	659,512	0	0
M&T Bank Corp.	COM	55261F104	9,314	80,000	SH		SOLE	0	80,000	0	0
Mylan, Inc.	COM	628530107	2,917	67,204	SH		SOLE	0	67,204	0	0
Noble Energy, Inc.	COM	655044105	22,370	328,446	SH		SOLE	0	328,446	0	0
Nordson Corp.	COM	655663102	21,458	288,800	SH		SOLE	0	288,800	0	0
NIKE, Inc., Class B	CLB	654106103	3,693	46,960	SH		SOLE	0	46,960	0	0
Neenah Paper, Inc.	COM	640079109	493	11,520	SH		SOLE	0	11,520	0	0
NetApp, Inc.	COM	64110D104	1,967	47,804	SH		SOLE	0	47,804	0	0
Nuance Communications, Inc.	COM	67020Y100	1,244	81,867	SH		SOLE	0	81,867	0	0
Nucor Corp.	COM	670346105	24,128	452,011	SH		SOLE	0	452,011	0	0
NVIDIA Corp.	COM	67066G104	1,602	100,000	SH		SOLE	0	100,000	0	0
Newell Rubbermaid, Inc.	COM	651229106	13,508	416,799	SH		SOLE	0	416,799	0	0
OmniAmerican Bancorp, Inc.	COM	68216R107	1,549	72,473	SH		SOLE	0	72,473	0	0
Oasis Petroleum, Inc.	COM	674215108	5,871	125,000	SH		SOLE	0	125,000	0	0
ONEOK, Inc.	COM	682680103	15,866	255,156	SH		SOLE	0	255,156	0	0
Oracle Corp.	COM	68389x105	19,884	519,695	SH		SOLE	0	519,695	0	0
Oritani Financial Corp.	COM	68633D103	1,780	110,927	SH		SOLE	0	110,927	0	0
Open Text Corp.	COM	683715106	359	3,900	SH		SOLE	0	3,900	0	0
Occidental Petroleum Corp.	COM	674599105	33,285	350,000	SH		SOLE	0	350,000	0	0
Palo Alto Networks, Inc.	COM	697435105	1,278	22,229	SH		SOLE	0	22,229	0	0
Peoples Federal Bancshares, In	COM	711037101	837	47,200	SH		SOLE	0	47,200	0	0
PepsiCo, Inc.	COM	713448108	18,336	221,073	SH		SOLE	0	221,073	0	0
Pfizer, Inc.	COM	717081103	17,545	572,800	SH		SOLE	0	572,800	0	0
Procter & Gamble Co., The	COM	742718109	3,427	42,099	SH		SOLE	0	42,099	0	0
Pall Corp.	COM	696429307	2,426	28,421	SH		SOLE	0	28,421	0	0
PNC Financial Services Group,	COM	693475105	3,377	43,531	SH		SOLE	0	43,531	0	0
Pentair, Ltd.	SHS	H6169Q108	17,014	219,050	SH		SOLE	0	219,050	0	0
PolyOne Corp.	COM	73179p106	813	23,000	SH		SOLE	0	23,000	0	0
Potash Corp. of Saskatchewan,	COM	73755L107	442	13,400	SH		SOLE	0	13,400	0	0
Powell Industries, Inc.	COM	739128106	333	4,974	SH		SOLE	0	4,974	0	0
Quanta Services, Inc.	COM	74762E102	13,173	417,387	SH		SOLE	0	417,387	0	0
Praxair, Inc.	COM	74005P104	2,645	20,345	SH		SOLE	0	20,345	0	0
QUALCOMM, Inc.	COM	747525103	4,270	57,512	SH		SOLE	0	57,512	0	0
Royal Gold, Inc.	COM	780287108	299	6,500	SH		SOLE	0	6,500	0	0
Red Hat, Inc.	COM	756577102	1,981	35,351	SH		SOLE	0	35,351	0	0
Rio Tinto PLC, ADR	SPONSORED ADR	767204100	529	9,383	SH		SOLE	0	9,383	0	0
Roper Industries, Inc.	COM NEW	776696106	2,402	17,322	SH		SOLE	0	17,322	0	0
Rosetta Resources, Inc.	COM	777779307	19,011	395,725	SH		SOLE	0	395,725	0	0
Ruth's Hospitality Group, Inc.	COM	783332109	611	42,975	SH		SOLE	0	42,975	0	0
Banco Santander SA, ADR	ADR	05964H105	435	48,000	SH		SOLE	0	48,000	0	0
SAP AG, ADR	SPON ADR	803054204	2,613	29,987	SH		SOLE	0	29,987	0	0
Starbucks Corp.	COM	855244109	27,764	354,175	SH		SOLE	0	354,175	0	0
US Silica Holdings, Inc.	COM	90346E103	887	26,000	SH		SOLE	0	26,000	0	0
Scripps Networks Interactive,	CL A COM	811065101	1,727	19,988	SH		SOLE	0	19,988	0	0
Sanofi, ADR	SPONSORED ADR	80105n105	3,486	65,000	SH		SOLE	0	65,000	0	0
Stericycle, Inc.	COM	858912108	17,426	150,000	SH		SOLE	0	150,000	0	0
SS&C Technologies Holdings, In	COM	78467J100	310	7,000	SH		SOLE	0	7,000	0	0
Statoil ASA, ADR	SPONSORED ADR	85771P102	1,033	42,800	SH		SOLE	0	42,800	0	0
State Street Corp.	COM	857477103	22,971	313,000	SH		SOLE	0	313,000	0	0
Stanley Black & Decker, Inc.	COM	854502101	2,629	32,587	SH		SOLE	0	32,587	0	0
Southwestern Energy Co.	COM	845467109	1,669	42,444	SH		SOLE	0	42,444	0	0
AT&T, Inc.	COM	00206R102	13,361	380,000	SH		SOLE	0	380,000	0	0
Territorial Bancorp, Inc.	COM	88145X108	1,508	65,010	SH		SOLE	0	65,010	0	0
Toronto-Dominion Bank, The	COM NEW	891160509	1,150	12,200	SH		SOLE	0	12,200	0	0
Telefonica SA, ADR	SPONSORED ADR	879382208	694	42,500	SH		SOLE	0	42,500	0	0
Teva Pharmaceutical Industries	ADR	881624209	882	22,000	SH		SOLE	0	22,000	0	0
Fresh Market, Inc., The	COM	35804H106	1,278	31,555	SH		SOLE	0	31,555	0	0
Gentherm, Inc.	COM	37253A103	584	21,800	SH		SOLE	0	21,800	0	0
TIBCO Software, Inc.	COM	88632Q103	542	24,100	SH		SOLE	0	24,100	0	0
Timken Co.	COM	887389104	531	9,650	SH		SOLE	0	9,650	0	0
Talisman Energy, Inc.	COM	87425E103	1,483	127,291	SH		SOLE	0	127,291	0	0
Thermo Fisher Scientific, Inc.	COM	883556102	3,948	35,452	SH		SOLE	0	35,452	0	0
Dealertrack Technologies, Inc.	COM	242309102	337	7,000	SH		SOLE	0	7,000	0	0
Trimble Navigation, Ltd.	COM	896239100	2,526	72,787	SH		SOLE	0	72,787	0	0
Tenaris SA, ADR	SPONSORED ADR	88031M109	350	8,000	SH		SOLE	0	8,000	0	0
Taiwan Semiconductor Manu. Co.	SPONSORED ADR	874039100	10,035	575,399	SH		SOLE	0	575,399	0	0
TheStreet, Inc.	COM	88368Q103	1,693	748,937	SH		SOLE	0	748,937	0	0
Time Warner Cable, Inc.	COM	88732J207	12,933	95,450	SH		SOLE	0	95,450	0	0
Time Warner, Inc.	COM NEW	887317303	22,220	318,699	SH		SOLE	0	318,699	0	0
Texas Instruments, Inc.	COM	882508104	2,433	55,418	SH		SOLE	0	55,418	0	0
UnitedHealth Group, Inc.	COM	91324p102	30,365	403,250	SH		SOLE	0	403,250	0	0
Ultra Petroleum Corp.	COM	903914109	1,516	70,000	SH		SOLE	0	70,000	0	0
United Parcel Service, Inc., C	CL B	911312106	2,850	27,118	SH		SOLE	0	27,118	0	0
United Rentals, Inc.	COM	911363109	1,941	24,904	SH		SOLE	0	24,904	0	0
US Bancorp	COM NEW	902973304	7,858	194,500	SH		SOLE	0	194,500	0	0
Unitil Corp.	COM	913259107	1,617	53,048	SH		SOLE	0	53,048	0	0
Visa, Inc., Class A	CL A	92826C839	11,245	50,500	SH		SOLE	0	50,500	0	0
Vascular Solutions, Inc.	COM	92231M109	535	23,131	SH		SOLE	0	23,131	0	0
VF Corp.	COM	918204108	3,476	55,752	SH		SOLE	0	55,752	0	0
Vodafone Group PLC, ADR	SPONS ADR NEW	92857W209	3,241	82,453	SH		SOLE	0	82,453	0	0
Volcano Corp.	COM	928645100	873	39,969	SH		SOLE	0	39,969	0	0
Whole Foods Market, Inc.	COM	966837106	19,698	340,625	SH		SOLE	0	340,625	0	0
Westwood Holdings Group, Inc.	COM	961765104	934	15,090	SH		SOLE	0	15,090	0	0
Weis Markets, Inc.	COM	948849104	868	16,506	SH		SOLE	0	16,506	0	0
Wabash National Corp.	COM	929566107	4,689	379,661	SH		SOLE	0	379,661	0	0
VCA Antech, Inc.	COM	918194101	803	25,600	SH		SOLE	0	25,600	0	0
Westell Technologies, Inc., Cl	CL A	957541105	1,922	474,561	SH		SOLE	0	474,561	0	0
Weyerhaeuser Co., REIT	COM	962166104	1,956	61,944	SH		SOLE	0	61,944	0	0
Xerox Corp	COM	984121103	341	28,000	SH		SOLE	0	28,000	0	0
Xylem, Inc.	COM	98419M100	647	18,700	SH		SOLE	0	18,700	0	0
Yahoo!, Inc.	COM	984332106	404	10,000	SH		SOLE	0	10,000	0	0
Zoetis, Inc.	CL A	98978V103	26,737	817,910	SH		SOLE	0	817,910	0	0
Pax MSCI EAFE ESG Index ETF	MSCI ESG IDX	70422P206	22,860	764,302	SH		SOLE	0	764,302	0	0
ProShares UltraShort Euro	ULTRASHRT EURO	74347W882	8,854	519,000	SH		SOLE	0	519,000	0	0
SPDR Gold Shares	GOLD SHS	78463V107	267	2,300	SH		SOLE	0	2,300	0	0
iShares Russell 1000 Growth In	RUS 1000 GRW ETF	464287614	531	6,181	SH		SOLE	0	6,344	0	0
iShares Silver Trust	ISHARES	46428Q109	6,539	349,507	SH		SOLE	0	349,507	0	0
iShares iBoxx $ High Yield Cor	IBOXX HI YD ETF	464288513	7,356	79,200	SH		SOLE	0	79,200	0	0
Equinix, Inc.	NOTE 3.000%10/1	29444UAG1	3,165	2,000,000	PRN		SOLE		2,000,000	0	0
Nuance Communications, Inc.	DBCV 2.750% 8/1	67020YAB6	5,253	5,000,000	PRN		SOLE		5,000,000	0	0