Mercury Systems INC Schedule 13G passive stakes
Filed when an investor crosses five percent without intending to seek control — the passive counterpart to a 13D.
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Vanguard Portfolio Management has reported a beneficial ownership of 5.13% in Mercury Systems Inc. common stock as of June 30, 2026.
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State Street Corporation has reported beneficial ownership of 3,865,719 shares, representing 6.4% of Mercury Systems Inc.'s common stock, as of March 31, 2026.
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The Vanguard Group has filed an amended Schedule 13G, reporting 0% beneficial ownership in Mercury Systems Inc. due to an internal realignment.
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William Blair Investment Management, LLC has reported a 4.2% beneficial ownership stake in Mercury Systems Inc., holding 2,526,133 shares of common stock.
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William Blair Investment Management, LLC has reported a 7.9% beneficial ownership stake in Mercury Systems Inc., holding 4,695,683 shares of common stock.
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BlackRock, Inc. has filed an Amendment No. 18 to Schedule 13G, disclosing a 13.3% beneficial ownership stake in Mercury Systems Inc. common stock as of June 30, 2025.
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State Street Corporation has filed a Schedule 13G, revealing a 5% beneficial ownership stake in Mercury Systems Inc. common stock, held for ordinary course of business.
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William Blair Investment Management, LLC has filed an Amendment No. 7 to Schedule 13G, disclosing a 9.0% beneficial ownership stake in Mercury Systems Inc. as of March 31, 2025.
NASDAQ
SCHEDULE 13G/A: William Blair Investment Management Discloses 10.8% Passive Stake in Mercury Systems Inc.
William Blair Investment Management, LLC has reported a 10.8% passive ownership stake in Mercury Systems Inc., holding 6,432,601 shares of common stock as of December 31, 2024.
NASDAQ
State Street Corporation has filed a Schedule 13G, reporting beneficial ownership of 4.9% of Mercury Systems Inc.'s common stock as of December 31, 2024.