ESSEX INVESTMENT MANAGEMENT CO LLC

BOSTON, MA · CIK 201772 · 13F filing filed 2024-08-12

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.

$534.7m reported value +5.5% vs Q1 2024

302positions

17.2%in top 10

31 new 82 added 124 reduced 35 sold out vs Q1 2024

Holdings, Q2 2024

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	AMERICAN SUPERCONDUCTOR CORP SHS NEW AMSC	AMSC	577,626	$13.5m2.53%	2.53%	Reduced -6.3k	-6,298 -1.1%
2	APPLE INC COM AAPL	AAPL	55,099	$11.6m2.17%	2.17%	Reduced -7.5k	-7,459 -11.9%
3	MICROSOFT CORP COM MSFT	MSFT	22,926	$10.2m1.92%	1.92%	Reduced -2.6k	-2,643 -10.3%
4	LEONARDO DRS INC COM DRS	DRS	373,996	$9.5m1.78%	1.78%	Added +47.9k	+47,868 14.7%
5	NEXTERA ENERGY INC COM NEE	NEE	121,979	$8.6m1.62%	1.62%	Reduced -12.7k	-12,655 -9.4%
6	HCI GROUP INC COM HCI	HCI	90,609	$8.4m1.56%	1.56%	Added +122	+122 0.1%
7	KRATOS DEFENSE & SEC SOLUTIO COM NEW KTOS	KTOS	407,618	$8.2m1.53%	1.53%	Added +51.5k	+51,483 14.5%
8	PRIMORIS SVCS CORP COM PRIM	PRIM	154,415	$7.7m1.44%	1.44%	Reduced -25.4k	-25,373 -14.1%
9	ASPEN AEROGELS INC COM ASPN	ASPN	295,116	$7.0m1.32%	1.32%	Reduced -90.3k	-90,339 -23.4%
10	TENET HEALTHCARE CORP COM NEW THC	THC	52,814	$7.0m1.31%	1.31%	Reduced -15.2k	-15,174 -22.3%
11	INSMED INC COM PAR $.01 INSM	INSM	103,184	$6.9m1.29%	1.29%	Reduced -5.4k	-5,445 -5.0%
12	AMAZON COM INC COM AMZN	AMZN	35,561	$6.9m1.29%	1.29%	Reduced -3.3k	-3,262 -8.4%
13	STERLING INFRASTRUCTURE INC COM STRL	STRL	56,867	$6.7m1.26%	1.26%	Added +1.7k	+1,706 3.1%
14	XYLEM INC COM XYL	XYL	49,235	$6.7m1.25%	1.25%	Added +770	+770 1.6%
15	TOWER SEMICONDUCTOR LTD SHS NEW TSEM	TSEM	167,028	$6.6m1.23%	1.23%	Added +2.0k	+2,000 1.2%
16	GUIDEWIRE SOFTWARE INC COM GWRE	GWRE	47,254	$6.5m1.22%	1.22%	Reduced -5.1k	-5,113 -9.8%
17	AVEPOINT INC COM CL A AVPT	AVPT	604,006	$6.3m1.18%	1.18%	Added +371.1k	+371,129 159.4%
18	SALESFORCE INC COM CRM	CRM	23,730	$6.1m1.14%	1.14%	Reduced -3.2k	-3,200 -11.9%
19	CECO ENVIRONMENTAL CORP COM CECO	CECO	207,864	$6.0m1.12%	1.12%	Added +1.9k	+1,882 0.9%
20	LIGAND PHARMACEUTICALS INC COM NEW LGND	LGND	70,780	$6.0m1.12%	1.12%	New
21	MYRIAD GENETICS INC COM MYGN	MYGN	240,128	$5.9m1.10%	1.10%	New
22	BP PLC SPONSORED ADR BP	BP	157,024	$5.7m1.06%	1.06%	Reduced -17.6k	-17,611 -10.1%
23	PATRICK INDS INC COM PATK	PATK	50,293	$5.5m1.02%	1.02%	Added +10.2k	+10,193 25.4%
24	ZETA GLOBAL HOLDINGS CORP CL A ZETA	ZETA	305,449	$5.4m1.01%	1.01%	Added +78.0k	+78,032 34.3%
25	GRAHAM CORP COM GHM	GHM	189,633	$5.3m1.00%	1.00%	Added +10.2k	+10,160 5.7%
26	LINCOLN EDL SVCS CORP COM LINC	LINC	442,249	$5.2m0.98%	0.98%	Added +21.9k	+21,889 5.2%
27	TRANSCAT INC COM TRNS	TRNS	43,273	$5.2m0.97%	0.97%	Added +5.8k	+5,838 15.6%
28	SELECT MED HLDGS CORP COM SEM	SEM	143,247	$5.0m0.94%	0.94%	Reduced -13.3k	-13,327 -8.5%
29	PROCEPT BIOROBOTICS CORP COM PRCT	PRCT	80,764	$4.9m0.92%	0.92%	Added +20.6k	+20,648 34.4%
30	GLOBUS MED INC CL A GMED	GMED	69,896	$4.8m0.90%	0.90%	Reduced -9.0k	-9,024 -11.4%
31	GENERAC HLDGS INC COM GNRC	GNRC	36,174	$4.8m0.89%	0.89%	Reduced -2.5k	-2,539 -6.6%
32	DYNAVAX TECHNOLOGIES CORP COM NEW DVAX	DVAX	419,191	$4.7m0.88%	0.88%	Added +15.5k	+15,505 3.8%
33	AMBARELLA INC SHS AMBA	AMBA	87,219	$4.7m0.88%	0.88%	New
34	GOLDMAN SACHS GROUP INC COM GS	GS	10,238	$4.6m0.87%	0.87%	Reduced -1.2k	-1,179 -10.3%
35	SUNOPTA INC COM STKL	STKL	849,492	$4.6m0.86%	0.86%	Added +20.6k	+20,635 2.5%
36	WILLDAN GROUP INC COM WLDN	WLDN	155,223	$4.5m0.84%	0.84%	Added +19.9k	+19,887 14.7%
37	MONTROSE ENVIRONMENTAL GROUP COM ONT	ONT	100,347	$4.5m0.84%	0.84%	Added +12.5k	+12,488 14.2%
38	LSI INDS INC OHIO COM LYTS	LYTS	305,286	$4.4m0.83%	0.83%	Added +39.7k	+39,712 14.9%
39	ARGAN INC COM AGX	AGX	56,791	$4.2m0.78%	0.78%	New
40	PAYMENTUS HOLDINGS INC COM CL A PAY	PAY	209,695	$4.0m0.75%	0.75%	Added +3.1k	+3,145 1.5%
41	ZSCALER INC COM ZS	ZS	20,527	$3.9m0.74%	0.74%	Reduced -2.0k	-2,033 -9.0%
42	EVERQUOTE INC COM CL A EVER	EVER	186,075	$3.9m0.73%	0.73%	New
43	MRC GLOBAL INC COM MRC	MRC	299,132	$3.9m0.72%	0.72%	Added +35.6k	+35,559 13.5%
44	NOVANTA INC COM NOVT	NOVT	23,299	$3.8m0.71%	0.71%	Added +3.3k	+3,254 16.2%
45	MIRION TECHNOLOGIES INC COM CL A MIR	MIR	350,498	$3.8m0.70%	0.70%	Added +91.0k	+90,998 35.1%
46	KINIKSA PHARMACEUTICALS INTL ORD SHS CL A KNSA	KNSA	199,799	$3.7m0.70%	0.70%	New
47	EXXON MOBIL CORP COM XOM	XOM	31,919	$3.7m0.69%	0.69%	Reduced -3.9k	-3,886 -10.8%
48	TALKSPACE INC COM TALK	TALK	1,547,721	$3.6m0.67%	0.67%	Added +208.2k	+208,227 15.6%
49	SWEETGREEN INC COM CL A SG	SG	112,333	$3.4m0.63%	0.63%	Reduced -5.5k	-5,522 -4.7%
50	GRIFFON CORP COM GFF	GFF	52,711	$3.4m0.63%	0.63%	Added +13.2k	+13,185 33.4%
51	ENVIRI CORP COM COM		387,814	$3.3m0.63%	0.63%	Added +49.3k	+49,321 14.6%
52	DISNEY WALT CO COM DIS	DIS	33,455	$3.3m0.62%	0.62%	Reduced -2.4k	-2,371 -6.6%
53	INTUIT COM INTU	INTU	5,042	$3.3m0.62%	0.62%	Reduced -1.7k	-1,655 -24.7%
54	TURTLE BEACH CORP COM NEW TBCH	TBCH	230,879	$3.3m0.62%	0.62%	Added +29.5k	+29,539 14.7%
55	ONESPAN INC COM OSPN	OSPN	255,348	$3.3m0.61%	0.61%	Added +35.9k	+35,867 16.3%
56	PETIQ INC COM CL A PETQ	PETQ	148,109	$3.3m0.61%	0.61%	Added +19.1k	+19,082 14.8%
57	ALPHATEC HLDGS INC COM NEW ATEC	ATEC	312,651	$3.3m0.61%	0.61%	Added +41.7k	+41,683 15.4%
58	ENERGY RECOVERY INC COM ERII	ERII	244,688	$3.3m0.61%	0.61%	Reduced -11.7k	-11,679 -4.6%
59	AGNICO EAGLE MINES LTD COM AEM	AEM	48,947	$3.2m0.60%	0.60%	Reduced -4.1k	-4,113 -7.8%
60	EVOLUS INC COM EOLS	EOLS	294,442	$3.2m0.60%	0.60%	Added +39.6k	+39,631 15.6%
61	CERAGON NETWORKS LTD ORD CRNT	CRNT	1,247,764	$3.1m0.58%	0.58%	Added +167.3k	+167,320 15.5%
62	BADGER METER INC COM BMI	BMI	16,567	$3.1m0.58%	0.58%	Unchanged
63	GREAT LAKES DREDGE & DOCK CO COM GLDD	GLDD	346,602	$3.0m0.57%	0.57%	Added +44.1k	+44,056 14.6%
64	BANCORP INC DEL COM TBBK	TBBK	80,166	$3.0m0.57%	0.57%	Added +10.6k	+10,590 15.2%
65	OCULAR THERAPEUTIX INC COM OCUL	OCUL	442,509	$3.0m0.57%	0.57%	Added +66.3k	+66,309 17.6%
66	TETRA TECHNOLOGIES INC DEL COM TTI	TTI	872,483	$3.0m0.56%	0.56%	Added +124.8k	+124,769 16.7%
67	COVENANT LOGISTICS GROUP INC CL A CVLG	CVLG	60,445	$3.0m0.56%	0.56%	Added +17.4k	+17,404 40.4%
68	COGNYTE SOFTWARE LTD ORD SHS CGNT	CGNT	388,350	$3.0m0.55%	0.55%	Added +48.9k	+48,898 14.4%
69	SUPERIOR INDS INTL INC COM SSUP	SSUP	908,097	$3.0m0.55%	0.55%	Added +118.2k	+118,151 15.0%
70	DELCATH SYS INC COM NEW DCTH	DCTH	335,903	$2.8m0.53%	0.53%	New
71	ARLO TECHNOLOGIES INC COM ARLO	ARLO	214,284	$2.8m0.52%	0.52%	New
72	NOVOCURE LTD ORD SHS NVCR	NVCR	161,486	$2.8m0.52%	0.52%	New
73	EXPRO GROUP HOLDINGS NV COM 96779EUR	96779EUR	118,721	$2.7m0.51%	0.51%	Added +30.5k	+30,528 34.6%
74	COGNEX CORP COM CGNX	CGNX	57,442	$2.7m0.50%	0.50%	Reduced -3.6k	-3,609 -5.9%
75	AMICUS THERAPEUTICS INC COM FOLD	FOLD	268,000	$2.7m0.50%	0.50%	New
76	ARROWHEAD PHARMACEUTICALS IN COM ARWR	ARWR	102,262	$2.7m0.50%	0.50%	Added +30.0k	+29,963 41.4%
77	VALMONT INDS INC COM VMI	VMI	9,594	$2.6m0.49%	0.49%	Reduced -792	-792 -7.6%
78	MATADOR RES CO COM MTDR	MTDR	44,132	$2.6m0.49%	0.49%	Added +6.6k	+6,600 17.6%
79	BGC GROUP INC CL A BGC	BGC	312,204	$2.6m0.48%	0.48%	Added +77.0k	+77,046 32.8%
80	EVERCORE INC CLASS A EVR	EVR	12,373	$2.6m0.48%	0.48%	Reduced -385	-385 -3.0%
81	STEREOTAXIS INC COM NEW STXS	STXS	1,406,412	$2.6m0.48%	0.48%	Added +212.4k	+212,423 17.8%
82	CLEARPOINT NEURO INC COM CLPT	CLPT	462,586	$2.5m0.47%	0.47%	Added +132.7k	+132,707 40.2%
83	ORION GROUP HLDGS INC COM ORN	ORN	260,972	$2.5m0.46%	0.46%	Added +4.5k	+4,548 1.8%
84	HELIOS TECHNOLOGIES INC COM HLIO	HLIO	51,080	$2.4m0.46%	0.46%	New
85	HERON THERAPEUTICS INC COM HRTX	HRTX	695,993	$2.4m0.46%	0.46%	New
86	BWX TECHNOLOGIES INC COM BWXT	BWXT	25,542	$2.4m0.45%	0.45%	Added +24.2k	+24,239 1860.2%
87	PAYCHEX INC COM PAYX	PAYX	20,351	$2.4m0.45%	0.45%	Reduced -4.0k	-4,050 -16.6%
88	INTERFACE INC COM TILE	TILE	163,504	$2.4m0.45%	0.45%	New
89	GOODRX HLDGS INC COM CL A GDRX	GDRX	304,770	$2.4m0.44%	0.44%	New
90	SIMILARWEB LTD SHS SMWB	SMWB	304,544	$2.4m0.44%	0.44%	Added +44.1k	+44,094 16.9%
91	HUBBELL INC COM HUBB	HUBB	6,458	$2.4m0.44%	0.44%	Unchanged
92	MATRIX SVC CO COM MTRX	MTRX	237,421	$2.4m0.44%	0.44%	Added +31.9k	+31,860 15.5%
93	DOCEBO INC COM DCBO	DCBO	59,769	$2.3m0.43%	0.43%	Added +15.5k	+15,548 35.2%
94	UNIVERSAL INS HLDGS INC COM UVE	UVE	122,501	$2.3m0.43%	0.43%	New
95	FRONTDOOR INC COM FTDR	FTDR	67,635	$2.3m0.43%	0.43%	Added +33.8k	+33,844 100.2%
96	ADAPTIVE BIOTECHNOLOGIES COR COM ADPT	ADPT	623,825	$2.3m0.42%	0.42%	Added +346.7k	+346,729 125.1%
97	PERMA-FIX ENVIRONMENTAL SVCS COM NEW PESI	PESI	219,130	$2.2m0.42%	0.42%	Added +29.7k	+29,680 15.7%
98	MEDIWOUND LTD SHS NEW MDWD	MDWD	142,794	$2.2m0.41%	0.41%	Added +10.3k	+10,307 7.8%
99	BUILDERS FIRSTSOURCE INC COM BLDR	BLDR	15,567	$2.2m0.40%	0.40%	Added +3.9k	+3,936 33.8%
100	INTRA-CELLULAR THERAPIES INC COM ITCI	ITCI	31,448	$2.2m0.40%	0.40%	Added +30.2k	+30,215 2450.5%

Sold out since Q1 2024

Security	Ticker	Shares held before	Value then
DIGI INTL INC DGII	DGII	219,515	$7.0m219.5k shares
COURSERA INC COUR	COUR	360,462	$5.1m360.5k shares
DECIPHERA PHARMACEUTICALS IN DCPH	DCPH	288,635	$4.5m288.6k shares
ICHOR HOLDINGS ICHR	ICHR	104,736	$4.0m104.7k shares
KINIKSA PHARMACEUTICALS LTD		172,740	$3.4m172.7k shares
KURA SUSHI USA INC KRUS	KRUS	28,751	$3.3m28.8k shares
CENTURY CMNTYS INC CCS	CCS	28,174	$2.7m28.2k shares
ARGAN INC		49,947	$2.5m49.9k shares
VIEMED HEALTHCARE INC VMD	VMD	250,109	$2.4m250.1k shares
KOPIN CORP KOPN	KOPN	1,224,056	$2.2m1.2m shares
AUGMEDIX INC AUGX	AUGX	528,985	$2.2m529.0k shares
BACKBLAZE INC BLZE	BLZE	200,219	$2.0m200.2k shares
VIAVI SOLUTIONS INC VIAV	VIAV	210,799	$1.9m210.8k shares
HEALTH CATALYST INC HCAT	HCAT	245,429	$1.8m245.4k shares
ACCURAY INC ARAY	ARAY	665,842	$1.6m665.8k shares
FENNEC PHARMACEUTICALS INC FENC	FENC	144,218	$1.6m144.2k shares
MYR GROUP INC DEL MYRG	MYRG	7,686	$1.4m7.7k shares
REVANCE THERAPEUTICS INC RVNC	RVNC	220,160	$1.1m220.2k shares
WOLFSPEED INC WOLF	WOLF	23,957	$706.7k24.0k shares
THREDUP INC TDUP	TDUP	337,945	$675.9k337.9k shares
CHAMPIONS ONCOLOGY INC CSBR	CSBR	77,200	$378.3k77.2k shares
S&W SEED CO		343,486	$166.1k343.5k shares
GENIUS SPORTS LIMITED GENI	GENI	15,092	$86.2k15.1k shares
DOXIMITY INC DOCS	DOCS	2,723	$73.3k2.7k shares
PIONEER NAT RES CO PXD	PXD	187	$49.1k187 shares