ESSEX INVESTMENT MANAGEMENT CO LLC

BOSTON, MA · CIK 201772 · 13F filing filed 2023-08-14

SEC-registered investment adviser since 1998 · limited liability company

Assets managed$712.7m
Staff13 · 9 in investment roles
Main clients (by assets)State and local governments 32%, High net worth individuals 18%, Mutual funds and ETFs 17%
Websiteessexinvest.com
Form ADV · 2026-03-30SEC adviser record

Legal entityESSEX INVESTMENT MANAGEMENT COMPANY, LLC (US)

Kindinstitutions
Others nearbyBoston, MA, Evanston, IL

As an employer

Offices in1 country

Where they work

people there (dot area)number not reportedmain officeHover or tap a dot. Australian and UK companies are placed at their business or registered address, with their staff across the whole country.

Offices

From Form ADV: the main office and the other offices where it does advisory work (at most the 25 largest), with the people doing investment work at each. “About” is worked out: the firm's investment staff less its other offices. Each city links to the other managers there.

City	Country	People
Boston, MA (main office)United States	United States	about 4
Evanston, ILUnited States	United States	5

Map: places from GeoNames (CC BY 4.0), outlines from Natural Earth.

$716.2m reported value +4.1% vs Q1 2023

369positions

16.1%in top 10

40 new 110 added 102 reduced 57 sold out vs Q1 2023

Holdings, Q2 2023

The small lines show how much was held over the last 4 quarters (adjusted for stock splits).

#	Security	Ticker	Shares	Value	% of portfolio	Change	Shares change
1	APPLE INC COM AAPL	AAPL	83,824	$16.3m2.27%	2.27%	Reduced -9.8k	-9,846 -10.5%
2	STERLING INFRASTRUCTURE INC COM STRL	STRL	254,949	$14.2m1.99%	1.99%	Reduced -50.0k	-50,046 -16.4%
3	MICROSOFT CORP COM MSFT	MSFT	38,533	$13.1m1.83%	1.83%	Reduced -11.2k	-11,204 -22.5%
4	DIGI INTL INC COM DGII	DGII	306,805	$12.1m1.69%	1.69%	Reduced -1.4k	-1,443 -0.5%
5	HCI GROUP INC COM HCI	HCI	194,557	$12.0m1.68%	1.68%	Reduced -1.2k	-1,195 -0.6%
6	TENET HEALTHCARE CORP COM NEW THC	THC	121,540	$9.9m1.38%	1.38%	Reduced -15.4k	-15,446 -11.3%
7	SUNOPTA INC COM STKL	STKL	1,473,367	$9.9m1.38%	1.38%	Reduced -30.1k	-30,123 -2.0%
8	GENERAC HLDGS INC COM GNRC	GNRC	64,738	$9.7m1.35%	1.35%	Added +12.0k	+11,980 22.7%
9	GLOBUS MED INC CL A GMED	GMED	153,584	$9.1m1.28%	1.28%	Added +95.1k	+95,088 162.6%
10	LEONARDO DRS INC COM DRS	DRS	501,281	$8.7m1.21%	1.21%	Added +48.5k	+48,522 10.7%
11	ENERGY RECOVERY INC COM ERII	ERII	290,544	$8.1m1.13%	1.13%	Reduced -163.4k	-163,440 -36.0%
12	BP PLC SPONSORED ADR BP	BP	227,953	$8.0m1.12%	1.12%	Reduced -36.5k	-36,469 -13.8%
13	ASPEN AEROGELS INC COM ASPN	ASPN	1,011,471	$8.0m1.11%	1.11%	Added +300.5k	+300,464 42.3%
14	SALESFORCE INC COM CRM	CRM	37,628	$7.9m1.11%	1.11%	Reduced -4.6k	-4,585 -10.9%
15	COGNEX CORP COM CGNX	CGNX	134,898	$7.6m1.06%	1.06%	Reduced -2.3k	-2,323 -1.7%
16	PRIMORIS SVCS CORP COM PRIM	PRIM	247,370	$7.5m1.05%	1.05%	New
17	KORNIT DIGITAL LTD SHS KRNT	KRNT	256,487	$7.5m1.05%	1.05%	Added +61.1k	+61,070 31.2%
18	AMAZON COM INC COM AMZN	AMZN	57,631	$7.5m1.05%	1.05%	Reduced -7.0k	-6,974 -10.8%
19	TPI COMPOSITES INC COM TPICQ	TPICQ	720,518	$7.5m1.04%	1.04%	Reduced -44.8k	-44,774 -5.8%
20	SOLAREDGE TECHNOLOGIES INC COM SEDG	SEDG	27,453	$7.4m1.03%	1.03%	Reduced -1.4k	-1,385 -4.8%
21	PATRICK INDS INC COM PATK	PATK	78,738	$6.3m0.88%	0.88%	Reduced -7.1k	-7,079 -8.2%
22	LIVENT CORP COM COM		224,478	$6.2m0.86%	0.86%	Reduced -6.5k	-6,494 -2.8%
23	EXXON MOBIL CORP COM XOM	XOM	55,137	$5.9m0.83%	0.83%	Reduced -4.0k	-3,998 -6.8%
24	XYLEM INC COM XYL	XYL	52,129	$5.9m0.82%	0.82%	Added +52.1k	+52,118 473800.0%
25	KURA SUSHI USA INC CL A COM KRUS	KRUS	62,377	$5.8m0.81%	0.81%	Added +9.0k	+9,045 17.0%
26	GOLDMAN SACHS GROUP INC COM GS	GS	17,496	$5.6m0.79%	0.79%	Reduced -1.5k	-1,507 -7.9%
27	CAMBIUM NETWORKS CORP SHS CMBMF	CMBMF	368,683	$5.6m0.78%	0.78%	Reduced -19.3k	-19,330 -5.0%
28	HERITAGE CRYSTAL CLEAN INC COM HCCI	HCCI	147,188	$5.6m0.78%	0.78%	Added +13.2k	+13,173 9.8%
29	ALBEMARLE CORP COM ALB	ALB	24,560	$5.5m0.77%	0.77%	Reduced -497	-497 -2.0%
30	SELECT MED HLDGS CORP COM SEM	SEM	164,631	$5.2m0.73%	0.73%	New
31	ALPHATEC HLDGS INC COM NEW ATEC	ATEC	291,316	$5.2m0.73%	0.73%	Added +34.9k	+34,863 13.6%
32	BOX INC CL A BOX	BOX	175,787	$5.2m0.72%	0.72%	Added +171.8k	+171,787 4294.7%
33	HUBBELL INC COM HUBB	HUBB	15,547	$5.2m0.72%	0.72%	Reduced -2.0k	-2,019 -11.5%
34	PEPSICO INC COM PEP	PEP	27,477	$5.1m0.71%	0.71%	Reduced -5.1k	-5,079 -15.6%
35	TRANSMEDICS GROUP INC COM TMDX	TMDX	59,760	$5.0m0.70%	0.70%	Reduced -10.8k	-10,820 -15.3%
36	ICHOR HOLDINGS SHS ICHR	ICHR	133,203	$5.0m0.70%	0.70%	Reduced -2.6k	-2,563 -1.9%
37	ENOVIX CORPORATION COM ENVX	ENVX	276,333	$5.0m0.70%	0.70%	Added +110.0k	+110,003 66.1%
38	VERACYTE INC COM VCYT	VCYT	187,917	$4.8m0.67%	0.67%	Added +14.2k	+14,200 8.2%
39	GUIDEWIRE SOFTWARE INC COM GWRE	GWRE	61,857	$4.7m0.66%	0.66%	Reduced -6.5k	-6,481 -9.5%
40	AGNICO EAGLE MINES LTD COM AEM	AEM	92,616	$4.6m0.65%	0.65%	Reduced -9.1k	-9,093 -8.9%
41	BADGER METER INC COM BMI	BMI	31,308	$4.6m0.65%	0.65%	Reduced -7.2k	-7,206 -18.7%
42	DISNEY WALT CO COM DIS	DIS	51,460	$4.6m0.64%	0.64%	Reduced -5.5k	-5,461 -9.6%
43	NEW RELIC INC COM NEWR	NEWR	67,494	$4.4m0.62%	0.62%	New
44	AEHR TEST SYS COM AEHR	AEHR	106,170	$4.4m0.61%	0.61%	Added +12.4k	+12,378 13.2%
45	TANDEM DIABETES CARE INC COM NEW TNDM	TNDM	175,688	$4.3m0.60%	0.60%	Reduced -12.0k	-12,025 -6.4%
46	NEWMONT CORP COM NEM	NEM	98,834	$4.2m0.59%	0.59%	Reduced -9.5k	-9,520 -8.8%
47	CENTURY CMNTYS INC COM CCS	CCS	53,475	$4.1m0.57%	0.57%	Added +14.7k	+14,689 37.9%
48	NOVANTA INC COM NOVT	NOVT	21,594	$4.0m0.56%	0.56%	Added +2.5k	+2,513 13.2%
49	INTUIT COM INTU	INTU	8,282	$3.8m0.53%	0.53%	Reduced -509	-509 -5.8%
50	BENCHMARK ELECTRS INC COM BHE	BHE	146,760	$3.8m0.53%	0.53%	Added +12.8k	+12,774 9.5%
51	DOCEBO INC COM DCBO	DCBO	94,967	$3.7m0.52%	0.52%	Added +8.9k	+8,860 10.3%
52	QUANTA SVCS INC COM PWR	PWR	18,901	$3.7m0.52%	0.52%	Reduced -10.3k	-10,329 -35.3%
53	BUILDERS FIRSTSOURCE INC COM BLDR	BLDR	26,758	$3.6m0.51%	0.51%	Reduced -11.5k	-11,540 -30.1%
54	ZURN ELKAY WATER SOLNS CORP COM ZWS	ZWS	134,714	$3.6m0.51%	0.51%	Reduced -1.2k	-1,181 -0.9%
55	SHOALS TECHNOLOGIES GROUP IN CL A SHLS	SHLS	141,028	$3.6m0.50%	0.50%	Reduced -803	-803 -0.6%
56	LSI INDS INC OHIO COM LYTS	LYTS	285,092	$3.6m0.50%	0.50%	Reduced -64.2k	-64,216 -18.4%
57	IDENTIV INC COM NEW INVE	INVE	424,603	$3.6m0.50%	0.50%	Added +50.8k	+50,753 13.6%
58	AXOGEN INC COM AXGN	AXGN	389,272	$3.6m0.50%	0.50%	Reduced -12.0k	-12,001 -3.0%
59	LUNA INNOVATIONS INC COM COM		386,923	$3.5m0.49%	0.49%	Added +45.9k	+45,867 13.4%
60	TRANSCAT INC COM TRNS	TRNS	40,220	$3.4m0.48%	0.48%	Added +4.8k	+4,821 13.6%
61	PAYCHEX INC COM PAYX	PAYX	30,552	$3.4m0.48%	0.48%	Reduced -1.1k	-1,136 -3.6%
62	AMTECH SYS INC COM PAR $0.01N ASYS	ASYS	354,500	$3.4m0.47%	0.47%	Added +42.7k	+42,682 13.7%
63	DOLLAR TREE INC COM DLTR	DLTR	23,301	$3.3m0.47%	0.47%	Added +1.4k	+1,439 6.6%
64	ADVANSIX INC COM ASIX	ASIX	94,723	$3.3m0.46%	0.46%	Added +10.8k	+10,801 12.9%
65	MARTIN MARIETTA MATLS INC COM MLM	MLM	7,152	$3.3m0.46%	0.46%	Reduced -1.6k	-1,636 -18.6%
66	BABCOCK & WILCOX ENTERPRISES COM BW	BW	537,674	$3.2m0.44%	0.44%	Added +61.4k	+61,426 12.9%
67	SENSATA TECHNOLOGIES HLDG PL SHS ST	ST	70,437	$3.2m0.44%	0.44%	Reduced -49.7k	-49,723 -41.4%
68	AIR PRODS & CHEMS INC COM APD	APD	10,573	$3.2m0.44%	0.44%	Unchanged
69	ENDAVA PLC ADS DAVA	DAVA	61,029	$3.2m0.44%	0.44%	Reduced -2.2k	-2,220 -3.5%
70	LINCOLN EDL SVCS CORP COM LINC	LINC	466,868	$3.1m0.44%	0.44%	Added +302.9k	+302,927 184.8%
71	ALTA EQUIPMENT GROUP INC COMMON STOCK ALTG	ALTG	179,688	$3.1m0.43%	0.43%	Added +21.4k	+21,398 13.5%
72	KOPIN CORP COM KOPN	KOPN	1,443,446	$3.1m0.43%	0.43%	Added +426.1k	+426,120 41.9%
73	SUPERIOR INDS INTL INC COM SSUP	SSUP	850,695	$3.1m0.43%	0.43%	Added +101.2k	+101,155 13.5%
74	NAVITAS SEMICONDUCTOR CORP COM NVTS	NVTS	284,492	$3.0m0.42%	0.42%	New
75	IMPINJ INC COM PI	PI	33,226	$3.0m0.42%	0.42%	Added +4.0k	+3,958 13.5%
76	CECO ENVIRONMENTAL CORP COM CECO	CECO	221,562	$3.0m0.41%	0.41%	Added +26.1k	+26,139 13.4%
77	RESOURCES CONNECTION INC COM RGP	RGP	187,468	$2.9m0.41%	0.41%	Reduced -10.7k	-10,659 -5.4%
78	ORTHOFIX MED INC COM OFIX	OFIX	160,922	$2.9m0.41%	0.41%	Added +47.5k	+47,501 41.9%
79	MP MATERIALS CORP COM CL A MP	MP	126,798	$2.9m0.41%	0.41%	Reduced -845	-845 -0.7%
80	PHREESIA INC COM PHR	PHR	93,231	$2.9m0.40%	0.40%	Added +8.8k	+8,801 10.4%
81	REVOLVE GROUP INC CL A RVLV	RVLV	175,629	$2.9m0.40%	0.40%	Reduced -6.9k	-6,925 -3.8%
82	MRC GLOBAL INC COM MRC	MRC	283,393	$2.9m0.40%	0.40%	Added +33.4k	+33,419 13.4%
83	APTIV PLC SHS 99911EUR	99911EUR	27,929	$2.9m0.40%	0.40%	Reduced -170	-170 -0.6%
84	KRATOS DEFENSE & SEC SOLUTIO COM NEW KTOS	KTOS	197,945	$2.8m0.40%	0.40%	Added +29.0k	+29,027 17.2%
85	INTEST CORP COM INTT	INTT	106,549	$2.8m0.39%	0.39%	Added +3.6k	+3,631 3.5%
86	E L F BEAUTY INC COM ELF	ELF	24,469	$2.8m0.39%	0.39%	Reduced -10.8k	-10,762 -30.6%
87	WILLDAN GROUP INC COM WLDN	WLDN	145,459	$2.8m0.39%	0.39%	Added +64.2k	+64,190 79.0%
88	ACCURAY INC COM ARAY	ARAY	716,272	$2.8m0.39%	0.39%	New
89	VUZIX CORP COM NEW VUZI	VUZI	542,029	$2.8m0.39%	0.39%	Added +121.8k	+121,787 29.0%
90	REVANCE THERAPEUTICS INC COM RVNC	RVNC	108,860	$2.8m0.38%	0.38%	Added +247	+247 0.2%
91	CHAMPION HOMES INC COM SKY	SKY	41,945	$2.7m0.38%	0.38%	Reduced -9.9k	-9,910 -19.1%
92	TETRA TECHNOLOGIES INC DEL COM TTI	TTI	803,741	$2.7m0.38%	0.38%	Added +233.4k	+233,399 40.9%
93	EVERCORE INC CLASS A EVR	EVR	21,739	$2.7m0.38%	0.38%	Added +3.1k	+3,066 16.4%
94	CHENIERE ENERGY INC COM NEW LNG	LNG	17,501	$2.7m0.37%	0.37%	Reduced -992	-992 -5.4%
95	GRAHAM CORP COM GHM	GHM	200,435	$2.7m0.37%	0.37%	Added +126.3k	+126,299 170.4%
96	KINIKSA PHARMACEUTICALS LTD COM CL A COM CL A		188,298	$2.7m0.37%	0.37%	Added +69.1k	+69,128 58.0%
97	VIEMED HEALTHCARE INC COM VMD	VMD	269,070	$2.6m0.37%	0.37%	Added +32.0k	+31,982 13.5%
98	ATRICURE INC COM ATRC	ATRC	53,279	$2.6m0.37%	0.37%	Added +7.8k	+7,843 17.3%
99	COMMERCIAL VEH GROUP INC COM CVGI	CVGI	225,919	$2.5m0.35%	0.35%	New
100	SKYWATER TECHNOLOGY INC COM COM		266,074	$2.5m0.35%	0.35%	Added +77.7k	+77,744 41.3%

Sold out since Q1 2023

Security	Ticker	Shares held before	Value then
CASTLE BIOSCIENCES INC CSTL	CSTL	480,918	$10.9m480.9k shares
EVOQUA WATER TECHNOLOGIES CO AQUA	AQUA	169,457	$8.4m169.5k shares
VIEWRAY INC VRAYQ	VRAYQ	1,332,991	$4.6m1.3m shares
VERTEX PHARMACEUTICALS INC VRTX	VRTX	10,939	$3.4m10.9k shares
LINDSAY CORP LNN	LNN	21,359	$3.2m21.4k shares
Nibe Industrier AB ORDF-SWEDEN NDRBF	NDRBF	279,665	$3.2m279.7k shares
O-I GLASS INC OI	OI	129,669	$2.9m129.7k shares
INSTRUCTURE HLDGS INC		93,185	$2.4m93.2k shares
AVID BIOSERVICES INC PPHM	PPHM	119,112	$2.2m119.1k shares
VITAL FARMS INC VITL	VITL	129,953	$2.0m130.0k shares
AKOYA BIOSCIENCES INC AKYA	AKYA	238,703	$2.0m238.7k shares
CODEXIS INC CDXS	CDXS	470,761	$1.9m470.8k shares
NANOSTRING TECHNOLOGIES INC NSTG	NSTG	189,954	$1.9m190.0k shares
CLEARPOINT NEURO INC CLPT	CLPT	196,092	$1.7m196.1k shares
TARGET CORP TGT	TGT	9,791	$1.6m9.8k shares
KNIGHT-SWIFT TRANSN HLDGS IN KNX	KNX	26,101	$1.5m26.1k shares
DZS INC DZSIQ	DZSIQ	181,287	$1.4m181.3k shares
INCYTE CORP INCY	INCY	18,481	$1.3m18.5k shares
CIENA CORP CIEN	CIEN	25,020	$1.3m25.0k shares
VALMONT INDS INC VMI	VMI	3,957	$1.3m4.0k shares
ZEBRA TECHNOLOGIES CORPORATI ZBRA	ZBRA	3,944	$1.3m3.9k shares
GENERAL MTRS CO GM	GM	29,276	$1.1m29.3k shares
COINBASE GLOBAL INC COIN	COIN	15,000	$1.0m15.0k shares
BORGWARNER INC BWA	BWA	20,572	$1.0m20.6k shares
QUALCOMM INC QCOM	QCOM	7,743	$987.9k7.7k shares