ESSEX INVESTMENT MANAGEMENT CO LLC

CIK

201772

Location

BOSTON, MA

Portfolio Value

Small $177,604,407

Diversification

Diversified

Filing Date

Global Rank

#2,025 / 8,232 ▲ 97

Top Industry

Biotechnology 9.6%

3Y Alpha vs SPY

+3.9%

Period ended 2 months ago

Filed May 11, 2026 · 33d

25 quarters · since Mar 2020

Clone Performance

Jun 2023–Jun 2026 · vs SPY

Hypothetical growth of cloning every reported 13F position and rebalancing on each filing, indexed to the same start.

Cloned portfolio

+94.3%

SPY

+76.5%

Annualised alpha

+3.9%

Max drawdown

−25.2%

Estimate. 13F holdings are quarter-lagged and long-only, so the clone rebalances about 45 days after each period end — when the filing becomes public — and excludes options and short positions. Past performance does not predict future results.

Portfolio Concentration

295 positions · as of Mar 31, 2026 · Δ vs Dec 31, 2025

Top Position

3.2%

−0.3 pts

Top 5

11.4%

+0.0 pts

Top 10

20.0%

+0.8 pts

HHI

Diversified+1

Portfolio Trend

25 quarters · across all stocks

Sector Breakdown

As of Mar 31, 2026

Sector	% Portfolio	Value	Positions
Industrials	28.2%	$177,604,407	65
Technology	24.9%	$156,289,491	82
Healthcare	23.5%	$147,835,756	49
Financial Services	5.7%	$35,842,377	16
Consumer Defensive	4.6%	$29,190,367	14
Communication Services	4.0%	$24,983,305	11
Consumer Cyclical	3.5%	$22,009,888	14
Energy	2.9%	$18,268,300	16
Basic Materials	2.3%	$14,280,332	18
Utilities	0.4%	$2,551,074	9
Unclassified	0.0%	$52,535	1

Last Quarter's Activity

Export CSV

Mar 31, 2026 vs Dec 31, 2025

Added To

Positions the filer increased

25 positions

Ticker	Company	Δ Shares	Shares	Value
RPID	Rapid Micro Biosystems, Inc.	+821,605	883,931	$2,006,523
CRGO	Freightos Ltd	+379,144	997,708	$1,636,241
BWAY	Brainsway Ltd.	+314,373	618,553	$8,220,569
IDN	Intellicheck, Inc.	+215,949	537,842	$3,759,515
BVS	Bioventus Inc.	+215,372	603,258	$5,507,745
LPTH	Lightpath Technologies Inc	+175,624	216,531	$2,171,805
CODA	Coda Octopus Group, Inc.	+166,341	189,640	$2,142,932
NMTC	NEUROONE MEDICAL TECHNOLOGIES Corp	+73,526	261,953	$203,537
DCBO	Docebo Inc.	+71,364	172,367	$3,011,251
OPTT	Ocean Power Technologies, Inc.	+30,579	205,193	$71,817
STXS	Stereotaxis, Inc.	+28,082	1,590,101	$2,925,785
TRT	Trio-Tech International	+15,737	31,474	$181,919
TTI	Tetra Technologies Inc	+13,706	774,099	$6,595,323
BLND	Blend Labs, Inc.	+13,316	762,290	$1,295,893
XERS	Xeris Biopharma Holdings, Inc.	+13,237	747,769	$4,337,060
CXDO	Crexendo, Inc.	+13,109	742,986	$4,584,223
CCLD	CareCloud, Inc.	+12,932	697,836	$2,547,101
INVE	Identiv, Inc.	+12,923	736,608	$2,725,449
AMSC	American Superconductor Corp /De/	+12,404	227,558	$7,702,838
ORN	Orion Group Holdings Inc	+12,011	461,772	$5,033,314
ENPH	Enphase Energy, Inc.	+11,305	35,440	$1,339,986
CURI	CuriosityStream Inc.	+10,950	620,879	$1,837,801
RVSB	Riverview Bancorp Inc	+10,316	390,295	$2,146,622
LAW	CS Disco, Inc.	+9,534	539,314	$2,060,179
MASS	908 Devices Inc.	+8,607	491,221	$3,006,272
No positions match the current search.

Trimmed

Positions the filer reduced

25 positions

Ticker	Company	Δ Shares	Shares	Value
ADPT	Adaptive Biotechnologies Corp	−130,814	493,403	$6,848,433
TSEM	Tower Semiconductor Ltd	−76,695	115,933	$20,343,922
AMPX	Amprius Technologies, Inc.	−71,324	445,441	$7,510,135
OSS	One Stop Systems, Inc.	−33,822	35,534	$268,992
LINC	Lincoln Educational Services Corp	−33,515	355,304	$14,453,766
KTOS	Kratos Defense & Security Solutions, Inc.	−31,350	158,844	$11,200,090
EVER	EverQuote, Inc.	−14,349	217,075	$3,347,296
FLNC	Fluence Energy, Inc.	−12,982	25,576	$351,925
STRL	Sterling Infrastructure, Inc.	−12,628	32,057	$13,055,854
GHM	Graham Corp	−12,397	128,294	$10,124,962
AGX	Argan Inc	−11,530	16,098	$8,767,775
CON	Concentra Group Holdings Parent, Inc.	−11,020	149,625	$3,209,456
AVPT	AvePoint, Inc.	−9,532	498,482	$4,740,563
VZ	Verizon Communications Inc	−6,787	6,546	$328,609
RFIL	R F Industries Ltd	−6,703	17,895	$184,497
CGNX	Cognex Corp	−6,195	30,065	$1,472,884
PAYX	Paychex Inc	−5,737	10,934	$1,007,240
NEE	Nextera Energy Inc	−5,247	9,923	$921,648
PEGA	Pegasystems Inc	−4,979	74,445	$3,168,379
CL	Colgate Palmolive Co	−4,429	6,931	$590,729
BKR	Baker Hughes Co	−4,010	54,682	$3,338,336
B	Barrick Mining Corp	−3,923	22,975	$937,150
IOT	Samsara Inc.	−3,818	33,164	$1,050,967
KO	Coca Cola Co	−3,739	10,563	$803,316
PG	PROCTER & GAMBLE Co	−3,567	5,865	$847,140
No positions match the current search.

New Positions

Positions the filer opened this quarter

25 positions

Ticker	Company	Shares	Value
NVCR	NovoCure Ltd	452,370	$4,930,833
SNDX	Syndax Pharmaceuticals Inc	198,985	$4,648,289
MG	Mistras Group, Inc.	268,567	$3,969,420
MITK	Mitek Systems Inc	275,602	$3,720,627
MRVL	Marvell Technology, Inc.	36,203	$3,585,907
AGIO	Agios Pharmaceuticals, Inc.	103,177	$3,490,477
SOPH	SOPHiA GENETICS SA	692,809	$3,429,404
DIOD	Diodes Inc /Del/	48,869	$3,335,797
APYX	Apyx Medical Corp	901,398	$3,326,158
RSKD	Riskified Ltd.	803,032	$3,147,885
LQDA	Liquidia Corp	78,171	$2,950,173
JOUT	Johnson Outdoors Inc	62,864	$2,923,804
BDSX	Biodesix Inc	132,086	$1,915,247
LGCY	Legacy Education Inc.	143,439	$1,795,856
LTRX	Lantronix Inc	342,489	$1,794,642
ALLT	Allot Ltd.	226,056	$1,505,532
SFM	Sprouts Farmers Market, Inc.	10,403	$802,383
LNN	Lindsay Corp	5,927	$705,727
MWH	SOLV Energy, Inc.	17,808	$534,774
AMBQ	Ambiq Micro, Inc.	19,216	$488,278
CVGI	Commercial Vehicle Group, Inc.	59,834	$204,033
HBIO	Harvard Bioscience Inc	27,021	$131,592
NTWK	Netsol Technologies Inc	37,493	$127,101
LVO	LiveOne, Inc.	24,535	$125,128
IFNNY	Infineon Technologies AG	607	$27,442
No positions match the current search.

Sold Out

Positions the filer fully exited

25 positions

Ticker	Company	Shares	Value
BBNX	Beta Bionics, Inc.	217,796	$6,636,244
UVE	Universal Insurance Holdings, Inc.	177,374	$5,995,241
ANGO	Angiodynamics Inc	360,544	$4,629,384
WGO	Winnebago Industries Inc	109,490	$4,436,534
MXL	Maxlinear, Inc	235,595	$4,106,420
GLDD	Great Lakes Dredge & Dock CORP	301,986	$3,962,056
RDCM	Radcom Ltd	228,305	$2,986,229
CRNT	Ceragon Networks Ltd	1,391,697	$2,922,563
DERM	Journey Medical Corp	345,977	$2,667,482
LZ	Legalzoom.Com, Inc.	267,857	$2,659,820
PROF	Profound Medical Corp.	309,604	$2,436,583
FSLR	First Solar, Inc.	8,021	$2,095,325
CTM	Castellum, Inc.	2,114,029	$1,908,968
PHR	Phreesia, Inc.	102,423	$1,732,997
SLND	Southland Holdings, Inc.	475,723	$1,579,400
BLDR	Builders FirstSource, Inc.	13,482	$1,387,162
PRLB	Proto Labs Inc	15,504	$784,347
DE	Deere & Co	1,468	$683,456
DFLI	Dragonfly Energy Holdings Corp.	196,007	$601,741
OWLT	Owlet, Inc.	28,563	$462,434
ARRY	Array Technologies, Inc.	46,725	$430,804
ACNT	Ascent Industries Co.	12,041	$194,943
AIRG	Airgain Inc	19,398	$78,755
LASE	Laser Photonics Corp	27,361	$67,581
SPY	Spdr S&P 500 ETF Trust	85	$57,963
No positions match the current search.

Portfolio Positions

Compact Export CSV View 13F filing

65 positions · $177,604,407 total · Industrials only · as of Mar 31, 2026

All sectors Basic Materials Communication Services Consumer Cyclical Consumer Defensive Energy Financial Services Healthcare Industrials Technology Utilities

Showing 1–50 of 65 positions by value · page 1 of 2

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
STRL	Sterling Infrastructure, Inc. Industrials	Reduced	32,057	-12,628	$13,055,854	−4.6%	7.35%
DRS	Leonardo DRS, Inc. Industrials	Added	261,454	+4,592	$11,639,932	+32.9%	6.55%
KTOS	Kratos Defense & Security Solutions, Inc. Industrials	Reduced	158,844	-31,350	$11,200,090	−22.4%	6.31%
GHM	Graham Corp Industrials	Reduced	128,294	-12,397	$10,124,962	+12.0%	5.70%
CECO	Ceco Environmental Corp Industrials	Added	157,246	+2,789	$9,368,716	+1.3%	5.28%
AGX	Argan Inc Industrials	Reduced	16,098	-11,530	$8,767,775	+1.3%	4.94%
AMSC	American Superconductor Corp /De/ Industrials	Added	227,558	+12,404	$7,702,838	+24.4%	4.34%
AMPX	Amprius Technologies, Inc. Industrials	Reduced	445,441	-71,324	$7,510,135	+84.2%	4.23%
GEV	GE Vernova Inc. Industrials	Reduced	8,319	-284	$7,261,655	+29.1%	4.09%
PRIM	Primoris Services Corp Industrials	Reduced	48,177	-2,804	$6,891,238	+8.9%	3.88%
TTI	Tetra Technologies Inc Industrials	Added	774,099	+13,706	$6,595,323	−7.4%	3.71%
WLDN	Willdan Group, Inc. Industrials	Added	78,292	+1,371	$5,994,035	−24.8%	3.37%
MIR	Mirion Technologies, Inc. Industrials	Added	309,110	+5,758	$5,746,354	−19.1%	3.24%
WMS	Advanced Drainage Systems, Inc. Industrials	Reduced	40,569	-2,266	$5,563,226	−10.3%	3.13%
BWXT	BWX Technologies, Inc. Industrials	Reduced	25,555	-1,692	$5,225,741	+11.0%	2.94%
ORN	Orion Group Holdings Inc Industrials	Added	461,772	+12,011	$5,033,314	+12.6%	2.83%
ECG	Everus Construction Group, Inc. Industrials	Added	38,098	+706	$4,497,849	+40.6%	2.53%
PKE	Park Aerospace Corp Industrials	Added	149,893	+2,645	$4,104,070	+30.6%	2.31%
MG	Mistras Group, Inc. Industrials	NEW	268,567	NEW	$3,969,420	NEW	2.23%
BKSY	BlackSky Technology Inc. Industrials	Added	136,104	+2,408	$3,424,376	+36.6%	1.93%
GFF	Griffon Corp Industrials	Added	47,076	+876	$3,421,483	+0.6%	1.93%
CMCO	Columbus Mckinnon Corp Industrials	Added	211,707	+3,717	$3,076,102	−14.3%	1.73%
RAIL	FreightCar America, Inc. Industrials	Added	352,343	+6,199	$2,808,173	−26.7%	1.58%
ARLO	Arlo Technologies, Inc. Industrials	Added	192,504	+3,585	$2,739,331	+3.6%	1.54%
INVE	Identiv, Inc. Industrials	Added	736,608	+12,923	$2,725,449	−1.9%	1.53%
ONT	Onterris, Inc. Industrials	Added	111,473	+1,960	$2,440,143	−10.3%	1.37%
CODA	Coda Octopus Group, Inc. Industrials	Added	189,640	+166,341	$2,142,932	+889.0%	1.21%
GENC	Gencor Industries Inc Industrials	Added	129,563	+3,457	$1,943,445	+18.9%	1.09%
CRGO	Freightos Ltd Industrials	Added	997,708	+379,144	$1,636,241	+16.0%	0.92%
ERII	Energy Recovery, Inc. Industrials	Reduced	132,322	-2,778	$1,332,482	−26.9%	0.75%
XYL	Xylem Inc. Industrials	Reduced	10,463	-304	$1,250,328	−14.7%	0.70%
CARR	CARRIER GLOBAL Corp Industrials	Added	20,458	+6,161	$1,151,989	+52.5%	0.65%
VMI	Valmont Industries Inc Industrials	Reduced	2,794	-1,083	$1,116,398	−28.4%	0.63%
PWR	Quanta Services, Inc. Industrials	Held	1,575	0	$864,706	+30.1%	0.49%
VLTO	Veralto Corp Industrials	Reduced	9,152	-174	$809,219	−13.0%	0.46%
LNN	Lindsay Corp Industrials	NEW	5,927	NEW	$705,727	NEW	0.40%
EME	EMCOR Group, Inc. Industrials	Reduced	734	-16	$541,919	+18.1%	0.31%
SNA	Snap-on Inc Industrials	Held	1,125	0	$408,622	+5.4%	0.23%
ESOA	Energy Services of America CORP Industrials	Held	26,088	0	$342,535	+60.7%	0.19%
OPXS	Optex Systems Holdings Inc Industrials	Held	23,126	0	$305,841	−6.7%	0.17%
GE	General Electric Co Industrials	Reduced	1,034	-25	$293,418	−10.1%	0.17%
PPIH	Perma-Pipe International Holdings, Inc. Industrials	Held	9,526	0	$283,970	−1.8%	0.16%
BWEN	Broadwind, Inc. Industrials	Held	94,788	0	$197,159	−26.5%	0.11%
RFIL	R F Industries Ltd Industrials	Reduced	17,895	-6,703	$184,497	+29.8%	0.10%
MATX	Matson, Inc. Industrials	Held	1,052	0	$172,464	+32.7%	0.10%
APT	Alpha Pro Tech Ltd Industrials	Held	34,375	0	$152,625	0.0%	0.09%
AIT	Applied Industrial Technologies Inc Industrials	Held	505	0	$133,986	+3.3%	0.08%
WM	Waste Management Inc Industrials	Held	494	0	$113,516	+4.6%	0.06%
NVT	nVent Electric plc Industrials	Held	842	0	$99,591	+16.0%	0.06%
WAB	Westinghouse Air Brake Technologies Corp Industrials	Reduced	306	-56	$76,472	−1.0%	0.04%