水星系統公司
US ˙ NasdaqGS ˙ US5893781089

SecurityMRCY / Mercury Systems, Inc.
InstitutionVanguard Group Inc
Latest Disclosed Ownership0 shares
Ownership 0.00%
Vanguard Group Inc ownership in MRCY / Mercury Systems, Inc.

2026-03-27 - Vanguard Group Inc has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 0 shares of Mercury Systems, Inc. (US:MRCY). This represents 0.0 percent ownership of the company. In their previous filing dated 2024-02-13 , Vanguard Group Inc had reported owning 5,669,352 shares, indicating a decrease of -100.00 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2026-03-27 2026-03-27 13G/A 5,669,352 0 -100.00 0.00 -100.00
2024-02-13 2024-02-13 13G/A 5,117,078 5,669,352 10.79 9.56 8.27
2023-02-09 2023-02-09 13G/A 5,166,909 5,117,078 -0.96 8.83 -3.18
2022-02-10 2022-02-10 13G/A 4,953,846 5,166,909 4.30 9.12 3.05
2021-02-10 2021-02-10 13G/A 5,249,379 4,953,846 -5.63 8.85 -6.35
2020-02-12 2020-02-12 13G/A 5,589,124 5,249,379 -6.08 9.45 -6.34
2019-08-09 2019-08-09 13G/A 4,712,682 5,589,124 18.60 10.09 3.70
2019-02-11 2019-02-11 13G/A 4,334,581 4,712,682 8.72 9.73 8.35
2018-02-09 2018-02-09 13G/A 3,237,548 4,334,581 33.88 8.98 13.81
2017-02-10 2017-02-10 13G/A 2,431,928 3,237,548 33.13 7.89 12.71
2016-02-10 2016-02-10 13G/A 2,431,928 7.00
2015-02-11 2015-02-11 13G/A 2,125,385 6.26
2014-02-11 2014-02-11 13G/A 1,879,336 5.64
2013-02-12 2013-02-12 13G/A 1,744,914 5.41
2012-02-09 2012-02-09 13G/A 1,581,271 5.16

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-01-29 2025-12-31 13F MERCURY SYS COM 589378108 5,632,049 -98,984 -1.73 411,196 -7.30 0.0060
2025-11-07 2025-09-30 13F MERCURY SYS COM 589378108 5,731,033 221,093 4.01 443,582 49.47 0.0066
2025-08-11 2025-06-30 13F MERCURY SYS COM 589378108 5,509,940 9,152 0.17 296,765 25.20 0.0048
2025-05-09 2025-03-31 13F MERCURY SYS COM 589378108 5,500,788 -49,822 -0.90 237,029 1.67 0.0043
2025-02-11 2024-12-31 13F MERCURY SYS COM 589378108 5,550,610 41,324 0.75 233,126 14.36 0.0041
2024-11-13 2024-09-30 13F MERCURY SYS COM 589378108 5,509,286 -206,000 -3.60 203,844 32.15 0.0037
2024-08-13 2024-06-30 13F MERCURY SYS COM 589378108 5,715,286 396,499 7.45 154,256 -1.69 0.0030
2024-05-10 2024-03-31 13F MERCURY SYS COM 589378108 5,318,787 -350,565 -6.18 156,904 -24.32 0.0031
2024-03-11 2023-12-31 13F/A-1 MERCURY SYS COM 589378108 5,669,352 53,387 0.95 207,328 -0.46 0.0045
2024-02-14 2023-12-31 13F MERCURY SYS COM 589378108 5,669,352 53,387 207,328 0.0039
2023-12-18 2023-09-30 13F/A-1 MERCURY SYS COM 589378108 5,615,965 429,532 8.28 208,296 16.11 0.0051
2023-11-14 2023-09-30 13F MERCURY SYS COM 589378108 5,615,965 429,532 208,296 0.0009
2023-08-14 2023-06-30 13F MERCURY SYS COM 589378108 5,186,433 -19,103 -0.37 179,399 -32.58 0.0043
2023-07-14 2023-03-31 13F/A-1 MERCURY SYS COM 589378108 5,205,536 88,458 1.73 266,107 16.24 0.0068
2023-05-15 2023-03-31 13F MERCURY SYS COM 589378108 5,205,536 88,458 266,107 0.0014
2023-02-10 2022-12-31 13F MERCURY SYS COM 589378108 5,117,078 94,743 1.89 228,938 12.28 0.0062
2022-11-14 2022-09-30 13F MERCURY SYS COM 589378108 5,022,335 -29,504 -0.58 203,907 -37.26 0.0060
2022-08-12 2022-06-30 13F MERCURY SYS COM 589378108 5,051,839 110,405 2.23 324,985 2.04 0.0091
2022-05-13 2022-03-31 13F MERCURY SYS COM 589378108 4,941,434 -225,475 -4.36 318,475 11.95 0.0075
2022-02-14 2021-12-31 13F MERCURY SYS COM 589378108 5,166,909 2,765 0.05 284,491 16.17 0.0065
2021-11-12 2021-09-30 13F MERCURY SYS COM 589378108 5,164,144 710 0.01 244,883 -28.45 0.0061
2021-08-13 2021-06-30 13F MERCURY SYS COM 589378108 5,163,434 89,568 1.77 342,232 -4.53 0.0085
2021-05-14 2021-03-31 13F MERCURY SYS COM 589378108 5,073,866 120,020 2.42 358,469 -17.83 0.0097
2021-02-12 2020-12-31 13F MERCURY SYS COM 589378108 4,953,846 96,029 1.98 436,236 15.93 0.0127
2020-11-16 2020-09-30 13F MERCURY SYS COM 589378108 4,857,817 -206,408 -4.08 376,287 -5.54 0.0125
2020-08-14 2020-06-30 13F MERCURY SYS COM 589378108 5,064,225 -218,828 -4.14 398,352 5.69 0.0141
2020-05-15 2020-03-31 13F MERCURY SYS COM 589378108 5,283,053 33,674 0.64 376,893 3.89 0.0161
2020-02-14 2019-12-31 13F MERCURY SYS COM 589378108 5,249,379 -397,165 -7.03 362,784 -20.85 0.0124
2019-11-14 2019-09-30 13F MERCURY SYS COM 589378108 5,646,544 136,258 2.47 458,329 18.23 0.0170
2019-08-14 2019-06-30 13F MERCURY SYS COM 589378108 5,510,286 696,956 14.48 387,649 25.68 0.0146
2019-05-15 2019-03-31 13F MERCURY SYS COM 589378108 4,813,330 100,648 2.14 308,438 38.40 0.0121
2019-02-14 2018-12-31 13F MERCURY SYS COM 589378108 4,712,682 71,756 1.55 222,862 -13.19 0.0100
2018-12-13 2018-09-30 13F/A-2 MERCURY SYS COM 589378108 4,640,926 114,329 2.53 256,735 49.02 0.0100
2018-11-23 2018-09-30 13F/A-1 MERCURY SYS COM 589378108 4,640,926 0 256,735 0.0100
2018-11-14 2018-09-30 13F MERCURY SYS COM 589378108 4,640,926 114,329 256,735
2018-08-14 2018-06-30 13F MERCURY SYS COM 589378108 4,526,597 130,399 2.97 172,282 -18.90 0.0072
2018-05-15 2018-03-31 13F MERCURY SYS COM 589378108 4,396,198 61,617 1.42 212,424 -4.56 0.0093
2018-02-14 2017-12-31 13F MERCURY SYS COM 589378108 4,334,581 117,895 2.80 222,580 1.75 0.0097
2017-11-14 2017-09-30 13F MERCURY SYS COM 589378108 4,216,686 98,626 2.39 218,761 26.21 0.0102
2017-08-24 2017-06-30 13F/A-1 MERCURY SYS COM 589378108 4,118,060 180,028 4.57 173,329 12.71 0.0085
2017-08-11 2017-06-30 13F MERCURY SYS COM 589378108 4,118,060 180,028 173,329
2017-05-12 2017-03-31 13F MERCURY SYS COM 589378108 3,938,032 700,484 21.64 153,780 57.18 0.0079
2017-02-14 2016-12-31 13F MERCURY SYS COM 589378108 3,237,548 149,621 4.85 97,839 28.95 0.0055
2016-11-14 2016-09-30 13F MERCURY SYS COM 589378108 3,087,927 87,285 2.91 75,871 1.71 0.0045
2016-08-10 2016-06-30 13F MERCURY SYS COM 589378108 3,000,642 479,432 19.02 74,596 45.75 0.0046
2016-05-13 2016-03-31 13F MERCURY SYS COM 589378108 2,521,210 89,282 3.67 51,181 14.63 0.0033
2016-02-08 2015-12-31 13F MERCURY SYS COM 589378108 2,431,928 46,910 1.97 44,650 17.67 0.0030
2015-11-12 2015-09-30 13F/A-1 MERCURY SYS COM 589378108 2,385,018 42,292 1.81 37,945 10.64 0.0016
2015-11-12 2015-09-30 13F/A-1 MERCURY SYS COM 589378108 2,385,018 42,292 37,945 0.0016
2015-08-13 2015-06-30 13F MERCURY SYS COM 589378108 2,342,726 65,996 2.90 34,297 -3.13 0.0023
2015-05-15 2015-03-31 13F/A-1 MERCURY SYS COM 589378108 2,276,730 151,345 7.12 35,404 19.67 0.0024
2015-05-14 2015-03-31 13F MERCURY SYS COM 589378108 2,276,730 35,404
2015-02-12 2014-12-31 13F MERCURY SYS COM 589378108 2,125,385 64,727 3.14 29,585 30.41 0.0021
2014-11-12 2014-09-30 13F MERCURY SYS COM 589378108 2,060,658 38,815 1.92 22,687 -1.05 0.0018
2014-08-11 2014-06-30 13F MERCURY SYS COM 589378108 2,021,843 48,051 2.43 22,928 -12.07 0.0018
2014-05-13 2014-03-31 13F MERCURY SYS COM 589378108 1,973,792 94,456 5.03 26,074 26.71 0.0022
2014-02-12 2013-12-31 13F MERCURY SYS COM 589378108 1,879,336 84,816 4.73 20,578 14.78 0.0018
2013-11-07 2013-09-30 13F MERCURY SYS COM 589378108 1,794,520 64,933 3.75 17,928 12.43 0.0018
2013-08-13 2013-06-30 13F MERCURY SYS COM 589378108 1,729,587 1,729,587 15,946 0.0017
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.