13F Filings History of ESSEX INVESTMENT MANAGEMENT CO LLC

Latest 13F report
Q4 2025 - 13 Feb 2026
Value $
$655,942,147
Signature - Title
David A Rozenson - Attorney-in-Fact
Location
Boston, MA
Summary
This page shows a list of all the recent 13F filings made by ESSEX INVESTMENT MANAGEMENT CO LLC. Form 13F is required to be filed within 45 days of the end of a calendar quarter. ESSEX INVESTMENT MANAGEMENT CO LLC reported 306 stock holdings with total value $655,942,147 as of Q4 2025. Top holdings included TSEM, KTOS, STRL, HCI, and LGND.

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Holdings Value
Quarter Holdings Value $ Bought Sold Net Top Holdings Form Type Filing Time
Q4 2025 306 $655,942,147 +$68,948,610 -$86,496,091 -$17,547,481 TSEM, KTOS, STRL, HCI, LGND 13F-HR 13 Feb 2026, 11:26
Q3 2025 299 $653,417,423 +$87,860,438 -$90,112,616 -$2,252,178 KTOS, STRL, AMSC, TSEM, INSM 13F-HR 06 Nov 2025, 09:54
Q2 2025 298 $549,965,759 +$61,604,239 -$90,873,983 -$29,269,744 KTOS, AMSC, STRL, DRS, AVPT 13F-HR 12 Aug 2025, 15:59
Q1 2025 303 $479,358,729 +$51,328,939 -$75,851,732 -$24,522,793 HCI, KTOS, DRS, AAPL, NEE 13F-HR 07 May 2025, 16:46
Q4 2024 307 $556,146,539 +$41,490,366 -$88,536,567 -$47,046,201 PRIM, AMSC, AAPL, KTOS, HCI 13F-HR 07 Feb 2025, 13:38
Q3 2024 302 $573,676,248 +$68,208,106 -$83,874,476 -$15,666,370 AMSC, DRS, AAPL, HCI, NEE 13F-HR 10 Oct 2024, 17:15
Q2 2024 302 $534,704,090 +$111,562,102 -$88,256,126 +$23,305,976 AMSC, AAPL, MSFT, DRS, NEE 13F-HR 12 Aug 2024, 14:00
Q1 2024 306 $506,689,603 +$62,730,705 -$110,023,946 -$47,293,241 MSFT, AAPL, HCI, NEE, CRM 13F-HR 03 May 2024, 15:57
Q4 2023 315 $507,936,941 +$45,612,966 -$213,313,654 -$167,700,688 STRL, AAPL, HCI, MSFT, CRM 13F-HR 07 Feb 2024, 18:26
Q3 2023 356 $612,715,205 +$103,899,744 -$148,077,290 -$44,177,546 AAPL, STRL, MSFT, HCI, PRIM 13F-HR 09 Nov 2023, 14:24
Q2 2023 369 $716,184,267 +$130,116,805 -$131,081,841 -$965,036 AAPL, STRL, MSFT, DGII, HCI 13F-HR 14 Aug 2023, 08:12
Q1 2023 385 $687,998,961 +$110,977,809 -$100,180,269 +$10,797,540 AAPL, MSFT, STKL, STRL, CSTL 13F-HR 04 May 2023, 16:49
Q4 2022 394 $641,869,000 +$81,878,795 -$84,851,684 -$2,972,889 AAPL, MSFT, DGII, STKL, CSTL 13F-HR 02 Feb 2023, 17:58
Q3 2022 411 $626,528,000 +$73,246,656 -$68,854,299 +$4,392,357 AAPL, STKL, DGII, MSFT, CSTL 13F-HR 14 Nov 2022, 12:17
Q2 2022 423 $619,029,000 +$85,903,749 -$93,488,280 -$7,584,531 AAPL, MSFT, GNRC, DGII, HCI 13F-HR 11 Aug 2022, 17:42
Q1 2022 390 $802,424,000 +$96,049,051 -$103,848,601 -$7,799,550 AAPL, MSFT, ASPN, TNDM, NEM 13F-HR 09 May 2022, 14:37
Q4 2021 403 $870,266,000 +$120,286,310 -$95,799,741 +$24,486,569 AAPL, MSFT, AMZN, ASPN, TNDM 13F-HR 10 Feb 2022, 16:17
Q3 2021 417 $815,165,000 +$73,690,470 -$95,893,690 -$22,203,220 ASPN, MSFT, AMZN, AAPL, ALB 13F-HR 09 Nov 2021, 14:29
Q2 2021 417 $860,005,000 +$129,149,481 -$155,801,896 -$26,652,415 AMZN, ASPN, MSFT, AAPL, RUN 13F-HR 12 Aug 2021, 11:48
Q1 2021 442 $820,021,000 +$135,218,100 -$191,322,973 -$56,104,873 AMZN, AAPL, MSFT, RUN, COWN 13F-HR 12 May 2021, 16:54
Q4 2020 476 $805,524,000 +$144,328,610 -$189,869,000 -$45,540,390 AMZN, RUN, AAPL, MSFT, PEP 13F-HR 12 Feb 2021, 16:52
Q3 2020 475 $698,736,000 +$125,352,849 -$116,226,733 +$9,126,116 VSLR, AMZN, MSFT, AAPL, VRTX 13F-HR 10 Nov 2020, 18:54
Q2 2020 418 $610,010,000 +$113,598,570 -$156,470,939 -$42,872,369 AMZN, MSFT, AAPL, NFLX, VRTX 13F-HR 04 Aug 2020, 16:07
Q1 2020 389 $493,849,000 +$90,689,574 -$263,539,860 -$172,850,286 AMZN, MSFT, AAPL, VRTX, BABA 13F-HR 01 May 2020, 18:35
Q4 2019 472 $813,223,000 +$190,541,525 -$127,402,204 +$63,139,321 DIS, AMZN, MSFT, BABA, AAPL 13F-HR 10 Feb 2020, 12:18
Q3 2019 465 $692,815,000 +$144,057,538 -$153,750,617 -$9,693,079 DIS, MSFT, AMZN, HD, RTN 13F-HR 22 Oct 2019, 16:45
Q2 2019 474 $728,645,000 +$172,642,844 -$147,574,205 +$25,068,639 IIPR, AMZN, DIS, MSFT, HD 13F-HR 15 Aug 2019, 10:47
Q1 2019 478 $676,970,000 +$120,619,259 -$185,044,996 -$64,425,737 IIPR, PANW, AMZN, CGC, AEM 13F-HR 14 May 2019, 21:05
Q4 2018 474 $636,124,000 $0 $0 $0 AMZN, PANW, MSFT, HD, AEM New Holdings 07 Feb 2019, 13:56
Q4 2018 474 $636,124,000 +$148,956,697 -$222,704,448 -$73,747,751 AMZN, PANW, MSFT, HD, AEM 13F-HR 06 Feb 2019, 11:38
Q3 2018 398 $842,970,000 +$132,185,097 -$127,942,739 +$4,242,358 AMZN, PANW, BIIB, RTN, HD 13F-HR 16 Oct 2018, 10:22
Q2 2018 396 $798,670,000 +$114,540,951 -$120,405,772 -$5,864,821 AMZN, PANW, RTN, HD, GOOG 13F-HR 17 Jul 2018, 16:18
Q1 2018 367 $760,544,000 +$88,914,778 -$107,194,638 -$18,279,860 AMZN, MS, PANW, RTN, HD 13F-HR 26 Apr 2018, 15:41
Q4 2017 355 $758,323,000 +$114,096,436 -$120,014,508 -$5,918,072 AMZN, MS, HD, PANW, GOOG 13F-HR 05 Feb 2018, 14:05
Q3 2017 353 $735,335,000 +$112,883,141 -$132,191,210 -$19,308,069 AMZN, CELG, AAPL, MS, BABA 13F-HR 30 Oct 2017, 16:07
Q2 2017 340 $698,749,000 +$124,861,320 -$87,625,543 +$37,235,777 AMZN, AAPL, CELG, MS, PANW 13F-HR 28 Jul 2017, 16:41
Q1 2017 346 $636,020,000 +$120,632,478 -$127,945,490 -$7,313,012 AMZN, AAPL, CELG, MS, CYBR 13F-HR 27 Apr 2017, 14:30
Q4 2016 339 $607,191,000 +$130,507,222 -$143,907,023 -$13,399,801 AMZN, AAPL, CELG, MS, CYBR 13F-HR 08 Feb 2017, 07:55
Q3 2016 331 $620,553,000 +$139,014,197 -$150,100,709 -$11,086,512 AMZN, AAPL, PANW, CELG, GOOG 13F-HR 01 Nov 2016, 14:36
Q2 2016 314 $600,742,000 +$116,797,994 -$123,434,066 -$6,636,072 AMZN, AEM, BMY, GOLD, CYBR 13F-HR 27 Jul 2016, 12:09
Q1 2016 312 $583,550,000 +$88,327,080 -$125,632,872 -$37,305,792 AMZN, FSLR, BMY, AEM, PANW 13F-HR 09 May 2016, 11:59
Q4 2015 309 $639,766,000 +$122,917,993 -$125,154,352 -$2,236,359 AMZN, PANW, FSLR, BMY, META 13F-HR 26 Jan 2016, 14:03
Q3 2015 318 $608,906,000 +$113,180,318 -$89,173,044 +$24,007,274 PANW, AMZN, JBLU, GILD, META 13F-HR 04 Nov 2015, 15:40
Q2 2015 312 $662,203,000 +$120,286,577 -$191,435,115 -$71,148,538 PANW, AAPL, BMY, DIS, GILD 13F-HR 28 Jul 2015, 16:53
Q1 2015 316 $714,665,000 +$127,639,185 -$148,252,689 -$20,613,504 PANW, WT, AAPL, BMY, GILD 13F-HR 06 May 2015, 06:18
Q4 2014 332 $686,664,000 +$96,587,916 -$102,923,032 -$6,335,116 GILD, CELG, JBLU, PANW, AAPL 13F-HR 27 Jan 2015, 11:25
Q3 2014 355 $653,505,000 +$134,536,775 -$150,812,245 -$16,275,470 GILD, CELG, META, SLB, PANW 13F-HR 29 Oct 2014, 08:44
Q2 2014 354 $678,918,000 +$172,940,852 -$170,529,230 +$2,411,622 GILD, CELG, AAPL, SLB, HAL 13F-HR 23 Jul 2014, 12:53
Q1 2014 344 $686,832,000 +$122,167,485 -$152,272,682 -$30,105,197 GILD, YHOO, GOOGL, CELG, AAPL 13F-HR 28 Apr 2014, 10:29
Q4 2013 360 $707,369,000 $0 $0 $0 GILD, GOOGL, CELG, AAPL, WT 13F-HR 28 Jan 2014, 10:05