EI
Essex Investment Management Co LLC 13F Holdings & Recent Stock Buys (Q2 2026)
Essex Investment Management Co LLCCIK: 0000201772
Diversified strategyMomentum followerQuality / disciplined sizing
Total reported value
$763.4M
Reporting period: 2026-06-30 · Number of holdings: 306
ESSEX INVESTMENT MANAGEMENT CO LLC disclosed 306 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $763.4M and a quarterly turnover rate of 45.7%.
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Personality snowflake
- Concentration
- 3.97
- Portfolio Stability
- 45.73
- Momentum
- 97.91
- Sector conviction
- 66.74
- Diversification
- 100
- Sizing Uniformity
- 85.71
Essex Investment Management Co LLC's disclosed holdings carry a Herfindahl concentration index of 0.010 — mathematically equivalent to about 101 equally-sized positions, well below its 306 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 1.43), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 40% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govSold out GSAT
New buy WERN
Add OUST
+22.5% $10.7M
Sold out PRIM
Trim INSM
-31.4% -$5.7M
Add AIP
-4.4% $8.7M
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
Showing top 200 holdings (of 306 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | TSEM | Tower Semiconductor Ltd. | Stock-Tech | 3.60% | +0.38% | -8.96% | |
| 2 | LINC | Lincoln Educational Services | Stock-Other | 2.22% | -0.07% | -4.20% | |
| 3 | KNSA | Kiniksa Pharmaceuticals International, plc | Stock-Other | 2.02% | +0.12% | -3.17% | |
| 4 | OUST | Ouster Inc | Stock-Other | 1.85% | +1.31% | +22.45% | |
| 5 | LGND | Ligand Pharmaceuticals | Stock-Healthcare | 1.80% | -0.05% | -25.48% | |
| 6 | CECO | Ceco Environmental CORP | Stock-Other | 1.79% | +0.31% | -4.34% | |
| 7 | STRL | Sterling Infrastructure Inc | Stock-Industrials | 1.78% | -0.29% | -49.61% | |
| 8 | AIP | Arteris Inc | Stock-Other | 1.77% | +1.01% | -4.36% | |
| 9 | MIRM | Mirum Pharmaceuticals Inc | Stock-Other | 1.62% | +0.04% | -2.46% | |
| 10 | AGX | Argan Inc | Stock-Industrials | 1.62% | +0.23% | -3.92% | |
| 11 | GHM | Graham CORP | Stock-Other | 1.51% | -0.09% | -27.19% | |
| 12 | DRS | Leonardo Drs Inc | Stock-Industrials | 1.40% | -0.44% | -4.30% | |
| 13 | ADPT | Adaptive Biotechnologies | Stock-Other | 1.33% | +0.25% | -4.18% | |
| 14 | WERN | Werner Enterprises Inc | Stock-Other | 1.32% | +1.32% | NEW | |
| 15 | HCI | Hci Group Inc | Stock-Other | 1.29% | -0.12% | -2.38% | |
| 16 | GEV | GE Vernova Inc | Stock-Industrials | 1.27% | +0.12% | -0.43% | |
| 17 | COHU | Cohu Inc | Stock-Other | 1.27% | +0.34% | -31.64% | |
| 18 | AAPL | Apple Inc | Stock-Tech | 1.23% | -0.08% | -0.47% | |
| 19 | AMSC | American Superconductor CORP | Stock-Other | 1.21% | -0.01% | -2.47% | |
| 20 | BWAY | Brainsway Ltd-adr | Stock-Other | 1.20% | -0.10% | -4.19% | |
| 21 | TTI | Tetra Technologies Inc | Stock-Other | 1.10% | +0.06% | -4.27% | |
| 22 | LYTS | Lsi Industries Inc | Stock-Other | 1.03% | +0.22% | +7.93% | |
| 23 | MRVL | Marvell Technology Inc | Stock-Tech | 1.01% | +0.44% | -28.43% | |
| 24 | KTOS | Kratos Defense & Security | Stock-Industrials | 1.00% | -0.77% | -3.32% | |
| 25 | TVTX | Travere Therapeutics Inc | Stock-Other | 1.00% | +0.24% | -17.22% | |
| 26 | GS | Goldman Sachs Group Inc | Stock-Financials | 1.00% | -0.01% | -0.57% | |
| 27 | PATK | Patrick Industries Inc | Stock-Consumer Disc | 0.98% | +0.17% | +79.46% | |
| 28 | ORN | Orion Group Holdings Inc | Stock-Other | 0.98% | +0.18% | -4.15% | |
| 29 | ASML | ASML Holding N.V. | Stock-Tech | 0.92% | +0.18% | -0.51% | |
| 30 | AMBA | Ambarella, Inc. | Stock-Tech | 0.90% | +0.23% | -2.90% | |
| 31 | NVCR | NovoCure Limited | Stock-Healthcare | 0.87% | +0.09% | -2.81% | |
| 32 | AMZN | Amazon.com Inc | Stock-Consumer Disc | 0.84% | -0.06% | -0.54% | |
| 33 | AVPT | Avepoint Inc | Stock-Other | 0.84% | +0.09% | +14.66% | |
| 34 | WMS | Advanced Drainage Systems In | Stock-Industrials | 0.83% | -0.05% | -0.38% | |
| 35 | SMTC | Semtech CORP | Stock-Tech | 0.81% | +0.19% | -24.52% | |
| 36 | OII | Oceaneering Intl Inc | Stock-Energy | 0.80% | -0.09% | -4.36% | |
| 37 | ECG | Everus Construction Group | Stock-Industrials | 0.79% | +0.08% | -4.52% | |
| 38 | AEM | Agnico Eagle Mines LTD | Stock-Materials | 0.78% | -0.46% | -0.47% | |
| 39 | LQDA | Liquidia CORP | Stock-Other | 0.78% | +0.31% | -4.39% | |
| 40 | WLDN | Willdan Group Inc | Stock-Other | 0.78% | -0.17% | -4.35% | |
| 41 | FEIM | Frequency Electronics Inc | Stock-Other | 0.77% | +0.12% | -4.28% | |
| 42 | MSFT | Microsoft CORP | Stock-Tech | 0.77% | -0.16% | -0.49% | |
| 43 | MAMA | Mama's Creations Inc | Stock-Other | 0.76% | -0.07% | -4.31% | |
| 44 | XERS | Xeris Biopharma Holdings Inc | Stock-Other | 0.74% | +0.05% | -4.30% | |
| 45 | PKE | Park Aerospace CORP | Stock-Other | 0.72% | +0.07% | -4.16% | |
| 46 | BDSX | Biodesix Inc | Stock-Other | 0.71% | +0.41% | +83.15% | |
| 47 | XMTR | Xometry Inc-a | Stock-Other | 0.71% | +0.71% | NEW | |
| 48 | BXC | Bluelinx Holdings Inc | Stock-Other | 0.70% | +0.70% | NEW | |
| 49 | MITK | Mitek Systems Inc | Stock-Other | 0.70% | +0.11% | -4.24% | |
| 50 | CXDO | Crexendo Inc | Stock-Other | 0.70% | -0.03% | -4.32% |
1–50 of 200
* This report is exclusively curated by the AlphaSMO team. AlphaSMO is the web's most authoritative 13F / Inside Trader database, delivering precise insider trading and institutional holdings insights.
Portfolio Performance
Performance for Q3 2026
-3.7%
Performance Last 4 Quarters
+26.7%
- Stdev
- +22%
- Beta
- +1.42
- Alpha
- -5.1%
- Max Drawdown
- -15.5%
- Annualized Perf
- +23%
- Batting Avg vs S&P
- +58.3%
- Sortino
- +1.91
- Stutzer
- +0.31
- Treynor
- +0.16
- Sterling
- +1.08
- Calmar
- +1.48
- Information Ratio
- +0.24
- Tracking Error
- +13.4%
- Stdev Down
- +12.1%
- Winning Months %
- +61.1%
- Losing Months %
- +38.9%
- Best 12 Months
- +59.7%
- Worst 12 Months
- +2.2%
- Efficiency Ratio
- +0.43
- Sharpe
- +1.06
- Stdev Sectors
- +11.1%
- Skewness
- -0.14
- Kurtosis
- -0.94
- Upside Potential
- +3.7
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 306 | $763.4M | 46 | ||
| 2026 Q1 | 305 | $631.7M | 38 | ||
| 2025 Q4 | 306 | $655.9M | 35 | ||
| 2025 Q3 | 299 | $653.4M | 67 | ||
| 2025 Q2 | 298 | $550.0M | 0 | ||
| 2025 Q1 | 303 | $479.4M | 100 | ||
| 2024 Q4 | 307 | $556.1M | 0 | ||
| 2024 Q3 | 302 | $573.7M | 0 | ||
| 2024 Q2 | 302 | $534.7M | 0 | ||
| 2024 Q1 | 306 | $506.7M | 0 | ||
| 2023 Q4 | 315 | $507.9M | 0 | ||
| 2023 Q3 | 356 | $612.7M | 0 | ||
| 2023 Q2 | 369 | $716.2M | 0 | ||
| 2023 Q1 | 386 | $688.0M | 0 | ||
| 2022 Q4 | 395 | $641.9M | 0 | ||
| 2022 Q3 | 411 | $626.5M | 0 | ||
| 2022 Q2 | 423 | $619.0M | 0 | ||
| 2022 Q1 | 391 | $802.4M | 0 | ||
| 2021 Q4 | 405 | $873.3M | 0 | ||
| 2021 Q3 | 419 | $815.2M | 0 | ||
| 2021 Q2 | 419 | $860.0M | 100 | ||
| 2021 Q1 | 445 | $820.0M | 46 | ||
| 2020 Q4 | 481 | $805.5M | 49 | ||
| 2020 Q3 | 480 | $698.7M | 42 | ||
| 2020 Q2 | 423 | $610.0M | 51 | ||
| 2020 Q1 | 393 | $493.9M | 75 | ||
| 2019 Q4 | 475 | $813.2M | 50 | ||
| 2019 Q3 | 468 | $692.8M | 48 | ||
| 2019 Q2 | 477 | $728.6M | 49 | ||
| 2019 Q1 | 481 | $677.0M | 48 | ||
| 2018 Q4 | 476 | $637.1M | 67 | ||
| 2018 Q3 | 398 | $850.9M | 38 | ||
| 2018 Q2 | 396 | $798.9M | 36 | ||
| 2018 Q1 | 367 | $760.5M | 31 | ||
| 2017 Q4 | 355 | $758.3M | 35 | ||
| 2017 Q3 | 353 | $735.8M | 38 | ||
| 2017 Q2 | 340 | $698.7M | 36 | ||
| 2017 Q1 | 346 | $638.2M | 42 | ||
| 2016 Q4 | 339 | $607.2M | 52 | ||
| 2016 Q3 | 331 | $620.9M | 53 | ||
| 2016 Q2 | 314 | $600.7M | 48 | ||
| 2016 Q1 | 312 | $583.6M | 43 | ||
| 2015 Q4 | 309 | $639.8M | 45 | ||
| 2015 Q3 | 318 | $608.9M | 41 | ||
| 2015 Q2 | 312 | $662.2M | 48 | ||
| 2015 Q1 | 316 | $714.7M | 46 | ||
| 2014 Q4 | 332 | $686.7M | 38 | ||
| 2014 Q3 | 355 | $653.5M | 49 | ||
| 2014 Q2 | 354 | $678.9M | 52 | ||
| 2014 Q1 | 344 | $686.8M | 46 | ||
| 2013 Q4 | 360 | $707.4M | 69 | ||
| 2013 Q3 | 356 | $659.7M | 57 | ||
| 2013 Q2 | 333 | $566.8M | — |
Holding changes this quarter
Essex Investment Management Co LLC's most significant position changes for 2026-06-30: Sold out: Globalstar Inc (GSAT); New buy: Werner Enterprises Inc (WERN); Sold out: Primoris Services CORP (PRIM); Sold out: Bioventus Inc - A (BVS); New buy: Xometry Inc-a (XMTR).
Showing top 200 changes by size (of 332 total)
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | WERN | Werner Enterprises Inc | +1.3% | NEW | New buy |
| 2 | OUST | Ouster Inc | +1.3% | +22.45% | Add |
| 3 | AIP | Arteris Inc | +1% | -4.36% | Trim |
| 4 | XMTR | Xometry Inc-a | +0.7% | NEW | New buy |
| 5 | BXC | Bluelinx Holdings Inc | +0.7% | NEW | New buy |
| 6 | TILE | Interface Inc | +0.6% | NEW | New buy |
| 7 | PGEN | Precigen Inc | +0.5% | NEW | New buy |
| 8 | NUVB | Nuvation Bio Inc | +0.5% | NEW | New buy |
| 9 | SFM | Sprouts Farmers Market Inc | +0.5% | +430.39% | Add |
| 10 | MRVL | Marvell Technology Inc | +0.4% | -28.43% | Trim |
| 11 | FET | Forum Energy Technologies In | +0.4% | NEW | New buy |
| 12 | CRWD | Crowdstrike Holdings Inc - A | +0.4% | NEW | New buy |
| 13 | BDSX | Biodesix Inc | +0.4% | +83.15% | Add |
| 14 | TSEM | Tower Semiconductor Ltd. | +0.4% | -8.96% | Trim |
| 15 | BRCC | Brc Inc-a | +0.4% | NEW | New buy |
| 16 | KVHI | Kvh Industries Inc | +0.4% | NEW | New buy |
| 17 | RDVT | Red Violet Inc | +0.4% | +35.46% | Add |
| 18 | REAL | Realreal Inc/the | +0.4% | NEW | New buy |
| 19 | COHU | Cohu Inc | +0.3% | -31.64% | Trim |
| 20 | BMI | Badger Meter Inc | +0.3% | +206.19% | Add |
| 21 | P | Everpure Inc-a | +0.3% | NEW | New buy |
| 22 | CECO | Ceco Environmental CORP | +0.3% | -4.34% | Trim |
| 23 | LQDA | Liquidia CORP | +0.3% | -4.39% | Trim |
| 24 | TNXP | Tonix Pharmaceuticals Holdin | +0.3% | NEW | New buy |
| 25 | LPTH | Lightpath Technologies Inc-a | +0.3% | +31.64% | Add |
| 26 | IWO | Ishares Russell 2000 Growth | +0.3% | +226.63% | Add |
| 27 | ADPT | Adaptive Biotechnologies | +0.3% | -4.18% | Trim |
| 28 | TVTX | Travere Therapeutics Inc | +0.2% | -17.22% | Trim |
| 29 | AGX | Argan Inc | +0.2% | -3.92% | Trim |
| 30 | AMBA | Ambarella, Inc. | +0.2% | -2.90% | Trim |
| 31 | LTRX | Lantronix Inc | +0.2% | +93.31% | Add |
| 32 | LGCY | Legacy Education Inc | +0.2% | +129.99% | Add |
| 33 | LYTS | Lsi Industries Inc | +0.2% | +7.93% | Add |
| 34 | III | Information Services Group | +0.2% | +110.84% | Add |
| 35 | SMTC | Semtech CORP | +0.2% | -24.52% | Trim |
| 36 | ORN | Orion Group Holdings Inc | +0.2% | -4.15% | Trim |
| 37 | ASML | ASML Holding N.V. | +0.2% | -0.51% | Trim |
| 38 | PATK | Patrick Industries Inc | +0.2% | +79.46% | Add |
| 39 | SIBN | Si-bone Inc | +0.2% | +27.73% | Add |
| 40 | DIOD | Diodes Inc | +0.1% | -4.37% | Trim |
| 41 | APYX | Apyx Medical CORP | +0.1% | +26.10% | Add |
| 42 | IBEX | IBEX Limited | +0.1% | +69.94% | Add |
| 43 | OSG | Octave Specialty Group Inc | +0.1% | +28.95% | Add |
| 44 | ACMR | Acm Research Inc-class A | +0.1% | — | Unchanged |
| 45 | KNSA | Kiniksa Pharmaceuticals International, plc | +0.1% | -3.17% | Trim |
| 46 | GEV | GE Vernova Inc | +0.1% | -0.43% | Trim |
| 47 | FEIM | Frequency Electronics Inc | +0.1% | -4.28% | Trim |
| 48 | MITK | Mitek Systems Inc | +0.1% | -4.24% | Trim |
| 49 | JOUT | Johnson Outdoors Inc-a | +0.1% | +49.81% | Add |
| 50 | ✓ | Alfen NV | +0.1% | +74.76% | Add |
1–50 of 200
Filing History
FAQ
What is Essex Investment Management Co LLC and what type of investor is it?
Essex Investment Management Co LLC is an investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $763.4M, spread across 306 disclosed positions.
What are Essex Investment Management Co LLC's largest equity positions?
Based on the latest 13F filing, Essex Investment Management Co LLC's top holdings by market value are:
1. Tower Semiconductor Ltd. (TSEM) — $27.5M (3.6%)
2. Lincoln Educational Services (LINC) — $17.0M (2.2%)
3. Kiniksa Pharmaceuticals International, plc (KNSA) — $15.4M (2.0%)
4. Ouster Inc (OUST) — $14.1M (1.9%)
5. Ligand Pharmaceuticals (LGND) — $13.8M (1.8%)
What changes did Essex Investment Management Co LLC make in its most recent portfolio filing?
In the latest reported quarter, Essex Investment Management Co LLC made 187 notable position adjustments: 25 new positions were initiated, 29 existing holdings were added to, 111 positions were partially reduced, and 22 were completely exited. The largest of these moves: Sold out: Globalstar Inc (GSAT); New buy: Werner Enterprises Inc (WERN); Sold out: Primoris Services CORP (PRIM); Sold out: Bioventus Inc - A (BVS); New buy: Xometry Inc-a (XMTR)
What sectors does Essex Investment Management Co LLC focus on?
Essex Investment Management Co LLC is concentrated in the following sectors based on its current disclosed equity portfolio:
• Information Technology: 33.2%
• Industrials: 28.8%
• Health Care: 13.6%
• Financials: 5.5%
• Consumer Discretionary: 4.9%
• Energy: 4.9%
Investment Profile
Essex Investment Management Co LLC returned an annualized 23.0% over the trailing 36 months — underperforming the S&P 500 by 5.1 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 1.42 (more volatile than the market) and a 58% quarterly batting average against the index.
Its portfolio is broadly diversified and moderately active, with 33.2% of the portfolio concentrated in Information Technology.
Its turnover score has risen from 0 to 46 over the past 4 quarters — a shift toward more active trading.
It has added to its AIP position over the past two quarters (+$9.1M, now $13.5M), while trimming KTOS over the same stretch (-$6.8M, still holding $7.7M).
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Developer Access
Access Essex Investment Management Co LLC's institutional profile programmatically:
REST API
curl https://alphasmo.com/api/v1/institutions/essex-investment-management-co-llcCLI
npx alphasmo institutions get essex-investment-management-co-llc