ESSEX INVESTMENT MANAGEMENT CO LLC

CIK

201772

Location

BOSTON, MA

Portfolio Value

Small $621,358,515

Diversification

Diversified

Filing Date

Global Rank

#2,330 / 8,622 ▼ 2 · as of Mar 2026

Top Industry

Biotechnology 9.7%

3Y Alpha vs SPY

+2.2%

Period ended 4 months ago

Filed May 11, 2026 · 3mo

25 quarters · since Mar 2020

Clone Performance

Jul 2023–Jul 2026 · vs SPY

Hypothetical growth of buying every stock this filer reported holding, rebalancing on each filing and indexed to the same start. Option positions cannot be bought this way and are left out.

Cloned portfolio

+83.4%

SPY

+67.9%

Annualised alpha

+3.6%

Max drawdown

−25.4%

Estimate. 13F holdings are quarter-lagged, so the clone rebalances about 45 days after each period end — when the filing becomes public — and it excludes option and short positions. It tracks 100% of reported value on average across 13 quarters. Past performance does not predict future results.

Portfolio Concentration

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

Top Position

3.3%

−0.2 pts

Top 5

11.5%

+0.1 pts

Top 10

20.2%

+1.0 pts

HHI

Diversified+2

Portfolio Trend

25 quarters · across all stocks

Sector Breakdown

As of Mar 31, 2026

Sector	% Portfolio	Value	Positions
Industrials	28.6%	$177,808,400	67
Technology	25.2%	$156,289,491	82
Healthcare	23.0%	$142,699,431	49
Financial Services	5.8%	$35,842,377	16
Consumer Defensive	4.7%	$29,190,367	14
Communication Services	4.0%	$24,983,305	11
Consumer Cyclical	3.5%	$22,009,888	14
Energy	2.5%	$15,651,316	15
Basic Materials	2.3%	$14,280,331	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	$1,712,108
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
OESX	Orion Energy Systems, Inc.	12,557	$109,748
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

296 tracked positions · $621,358,515 total · 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 296 positions by value · page 1 of 6

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
TSEM	Tower Semiconductor Ltd Technology	Reduced	115,933	-76,695	$20,343,922	−10.1%	3.27%
LINC	Lincoln Educational Services Corp Consumer Defensive	Reduced	355,304	-33,515	$14,453,766	+53.9%	2.33%
STRL	Sterling Infrastructure, Inc. Industrials	Reduced	32,057	-12,628	$13,055,854	−4.6%	2.10%
KNSA	Kiniksa Pharmaceuticals International, plc Healthcare	Reduced	249,278	-1,697	$12,002,735	+15.9%	1.93%
LGND	Ligand Pharmaceuticals Inc Healthcare	Reduced	58,460	-1,560	$11,671,539	+2.9%	1.88%
DRS	Leonardo DRS, Inc. Industrials	Added	261,454	+4,592	$11,639,932	+32.9%	1.87%
KTOS	Kratos Defense & Security Solutions, Inc. Industrials	Reduced	158,844	-31,350	$11,200,090	−22.4%	1.80%
GSAT	Globalstar, Inc. Communication Services	Reduced	165,665	-1,724	$11,003,469	+7.7%	1.77%
INSM	INSMED Inc Healthcare	Added	62,676	+253	$10,248,779	−5.7%	1.65%
GHM	Graham Corp Industrials	Reduced	128,294	-12,397	$10,124,962	+12.0%	1.63%
MIRM	Mirum Pharmaceuticals, Inc. Healthcare	Reduced	108,338	-2,972	$10,008,264	+13.8%	1.61%
CECO	Ceco Environmental Corp Industrials	Added	157,246	+2,789	$9,368,716	+1.3%	1.51%
HCI	HCI Group, Inc. Financial Services	Reduced	57,634	-1,575	$8,910,792	−21.5%	1.43%
AGX	Argan Inc Industrials	Reduced	16,098	-11,530	$8,767,775	+1.3%	1.41%
AAPL	Apple Inc. Technology	Reduced	32,580	-2,288	$8,268,478	−12.8%	1.33%
BWAY	Brainsway Ltd. Healthcare	Added	618,553	+314,373	$8,220,569	+42.1%	1.32%
AEM	Agnico Eagle Mines Ltd Basic Materials	Reduced	38,643	-1,379	$7,843,756	+15.6%	1.26%
AMSC	American Superconductor Corp /De/ Industrials	Added	227,558	+12,404	$7,702,838	+24.4%	1.24%
AMPX	Amprius Technologies, Inc. Industrials	Reduced	445,441	-71,324	$7,510,135	+84.2%	1.21%
GEV	GE Vernova Inc. Industrials	Reduced	8,319	-284	$7,261,655	+29.1%	1.17%
PRIM	Primoris Services Corp Industrials	Reduced	48,177	-2,804	$6,891,238	+8.9%	1.11%
TTI	Tetra Technologies Inc Industrials	Added	774,099	+13,706	$6,595,323	−7.4%	1.06%
GS	Goldman Sachs Group Inc Financial Services	Reduced	7,556	-1,103	$6,392,300	−16.0%	1.03%
WLDN	Willdan Group, Inc. Industrials	Added	78,292	+1,371	$5,994,035	−24.8%	0.96%
COHU	Cohu Inc Technology	Added	191,885	+3,352	$5,875,518	+33.9%	0.95%
MSFT	Microsoft Corp Technology	Reduced	15,791	-1,822	$5,845,354	−31.4%	0.94%
MIR	Mirion Technologies, Inc. Industrials	Added	309,110	+5,758	$5,746,354	−19.1%	0.92%
AMZN	Amazon Com Inc Consumer Cyclical	Reduced	27,208	-1,625	$5,666,610	−14.9%	0.91%
OII	Oceaneering International Inc Energy	Added	158,374	+2,940	$5,617,525	+50.4%	0.90%
WMS	Advanced Drainage Systems, Inc. Industrials	Reduced	40,569	-2,266	$5,563,226	−10.3%	0.90%
BVS	Bioventus Inc. Healthcare	Added	603,258	+215,372	$5,507,745	+90.9%	0.89%
MAMA	Mama's Creations, Inc. Consumer Defensive	Added	341,657	+6,033	$5,241,018	+15.8%	0.84%
BWXT	BWX Technologies, Inc. Industrials	Reduced	25,555	-1,692	$5,225,741	+11.0%	0.84%
PATK	Patrick Industries Inc Consumer Cyclical	Added	46,228	+287	$5,134,543	+3.1%	0.83%
LYTS	Lsi Industries Inc Technology	Added	274,082	+4,834	$5,097,925	+3.4%	0.82%
ORN	Orion Group Holdings Inc Industrials	Added	461,772	+12,011	$5,033,314	+12.6%	0.81%
NVCR	NovoCure Ltd Healthcare	NEW	452,370	NEW	$4,930,833	NEW	0.79%
TVTX	Travere Therapeutics, Inc. Healthcare	Added	161,705	+2,996	$4,804,255	−20.8%	0.77%
AIP	Arteris, Inc. Technology	Added	290,319	+5,152	$4,772,844	+8.0%	0.77%
AVPT	AvePoint, Inc. Technology	Reduced	498,482	-9,532	$4,740,563	−32.8%	0.76%
ASML	Asml Holding NV Technology	Reduced	3,556	-250	$4,696,871	+15.3%	0.76%
SNDX	Syndax Pharmaceuticals Inc Healthcare	NEW	198,985	NEW	$4,648,289	NEW	0.75%
CXDO	Crexendo, Inc. Communication Services	Added	742,986	+13,109	$4,584,223	−2.9%	0.74%
ECG	Everus Construction Group, Inc. Industrials	Added	38,098	+706	$4,497,849	+40.6%	0.72%
XERS	Xeris Biopharma Holdings, Inc. Healthcare	Added	747,769	+13,237	$4,337,060	−24.8%	0.70%
GMED	Globus Medical Inc Healthcare	Reduced	50,004	-1,405	$4,308,344	−4.0%	0.69%
AMBA	Ambarella Inc Technology	Reduced	82,387	-1,456	$4,241,282	−28.6%	0.68%
XZO	Exzeo Group, Inc. Financial Services	Reduced	288,111	-2,965	$4,226,588	−40.1%	0.68%
FEIM	Frequency Electronics Inc Technology	Added	93,026	+1,646	$4,117,330	−16.3%	0.66%
JAZZ	Jazz Pharmaceuticals plc Healthcare	Reduced	21,778	-1,417	$4,117,130	+4.4%	0.66%

Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.