MASS Institutional Ownership
Top institutional (13F) holders of MASS and activist (13D/G) positions, sourced from SEC EDGAR.
Institutional owners
30
Institutional value
$79.7M
Top holder
ARK Investment Management LLC
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Top holders
| Holder | Filed | Value |
|---|---|---|
| ARK Investment Management LLCinvestment advisor | Aug 14, 2026 | $17.64M |
| BlackRock, Inc.holding company | Aug 7, 2026 | $16.91M |
| Vanguard Capital Managementinvestment advisor | Aug 13, 2026 | $11.24M |
| GEODE CAPITAL MANAGEMENT, LLCinvestment advisor | Aug 12, 2026 | $6.63M |
| STATE STREET CORPORATIONinvestment advisor | Sep 22, 2026 | $5.28M |
| MORGAN STANLEYinvestment advisor | Aug 13, 2026 | $3.52M |
| NORTHERN TRUST CORPinvestment advisor | Aug 13, 2026 | $2.32M |
| BANK OF AMERICA CORP /DE/investment advisor | Aug 14, 2026 | $2.18M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INCinvestment advisor | Aug 14, 2026 | $2.03M |
| Vanguard Portfolio Managementinvestment advisor | Aug 13, 2026 | $1.7M |
| RENAISSANCE TECHNOLOGIES LLCinvestment advisor | Aug 13, 2026 | $1.67M |
| Dimensional Fund Advisors LPinvestment advisor | Aug 11, 2026 | $1.08M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLPinvestment advisor | Aug 14, 2026 | $981.1K |
| AQR CAPITAL MANAGEMENT LLCinvestment advisor | Aug 14, 2026 | $904K |
| MILLENNIUM MANAGEMENT LLCinvestment advisor | May 15, 2026 | $871.6K |
| UBS Group AGinvestment advisor | Aug 13, 2026 | $673.5K |
| GOLDMAN SACHS GROUP INCinvestment advisor | Aug 14, 2026 | $663.2K |
| D. E. Shaw & Co., Inc.investment advisor | Aug 14, 2026 | $656.4K |
| Bank of New York Mellon Corpholding company | Aug 6, 2026 | $633K |
| CITADEL ADVISORS LLCinvestment advisor | Sep 1, 2026 | $545.9K |
| TWO SIGMA INVESTMENTS, LPinvestment advisor | May 15, 2026 | $270.1K |
| AllianceBernstein L.P.investment advisor | Aug 14, 2026 | $242K |
| WELLS FARGO & COMPANY/MNinvestment advisor | Aug 14, 2026 | $212K |
| T. Rowe Price Associates, Inc.investment advisor | Aug 14, 2026 | $178K |
| FMR LLCinvestment advisor | Aug 13, 2026 | $168.8K |
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Source: SEC EDGAR Schedule 13D / 13G and 13F filings.