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Livermore
Livermore
ZHEN

908 Devices Inc.

MASS
Exchange
Nasdaq
Industry
Laboratory Analytical Instruments
SEC CIK
0001555279

In the last 90 days, 908 Devices Inc. insiders filed 0 open-market purchases and 13 sales; 111 institutions reported holding it in 13F filings for Q2 2026, worth $244.1M in total; ARK Invest is the only superinvestor holding it.

Superinvestors holding MASS, Q2 2026

1 superinvestor reports holding 908 Devices Inc. on Form 13F, worth $17.6M in total. Weight is 908 Devices Inc.'s share of each 13F portfolio; actions compare shares with Q1 2026.

See all superinvestors
Superinvestors holding MASS in Q2 2026
Superinvestor% of portfolioSharesValuevs. previous quarter
ARK InvestCathie Wood0.1%2,027,920$17.6MAdded+4.2%

Moves by quarter

Superinvestors that opened, added to, trimmed or sold out of MASS each quarter, comparing shares with the quarter before. A superinvestor that didn't file for a quarter isn't listed, and isn't counted as selling.

  1. Q2 2026

    1 superinvestor holding at quarter end

    Added
    ARK Invest (+4.2%)

  2. Q1 2026

    1 superinvestor holding at quarter end

    Reduced
    ARK Invest (−2.0%)

  3. Q4 2025

    1 superinvestor holding at quarter end

    Added
    ARK Invest (+1.6%)

  4. Q3 2025

    1 superinvestor holding at quarter end

    Reduced
    ARK Invest (−26.2%)

  5. Q2 2025

    1 superinvestor holding at quarter end

    Reduced
    ARK Invest (−8.7%)

  6. Q1 2025

    1 superinvestor holding at quarter end

    Added
    ARK Invest (+4.0%)

  7. Q4 2024

    1 superinvestor holding at quarter end

    Reduced
    ARK Invest (−13.4%)

  8. Q3 2024

    1 superinvestor holding at quarter end

    Reduced
    ARK Invest (−18.2%)

  9. Q2 2024

    1 superinvestor holding at quarter end

    Reduced
    ARK Invest (−2.7%)

  10. Q1 2024

    1 superinvestor holding at quarter end

    Reduced
    ARK Invest (−6.8%)

  11. Q4 2023

    1 superinvestor holding at quarter end

    Added
    ARK Invest (+8.3%)

  12. Q3 2023

    1 superinvestor holding at quarter end

    Added
    ARK Invest (+1.0%)

  13. Q2 2023

    1 superinvestor holding at quarter end

    Reduced
    ARK Invest (−0.5%)

  14. Q1 2023

    1 superinvestor holding at quarter end

    Added
    ARK Invest (+8.2%)

  15. Q4 2022

    1 superinvestor holding at quarter end

    Reduced
    ARK Invest (−2.3%)

  16. Q3 2022

    1 superinvestor holding at quarter end

    Added
    ARK Invest (+4.1%)

  17. Q2 2022

    1 superinvestor holding at quarter end

    Added
    ARK Invest (+4.2%)

  18. Q1 2022

    1 superinvestor holding at quarter end

    Added
    ARK Invest (+16.2%)

  19. Q4 2021

    1 superinvestor holding at quarter end

    Added
    ARK Invest (+8.9%)

  20. Q3 2021

    1 superinvestor holding at quarter end

    Added
    ARK Invest (+12.1%)

  21. Q2 2021

    1 superinvestor holding at quarter end

    Added
    ARK Invest (+128.8%)