Mercury Systems, Inc.
US ˙ NasdaqGS ˙ US5893781089

SecurityMRCY / Mercury Systems, Inc.
InstitutionFifth Third Bancorp
Latest Disclosed Ownership267,101 shares
Latest Disclosed Value $ 19,474,307
Fifth Third Bancorp reports 22,232.86% increase in ownership of MRCY / Mercury Systems, Inc.

On May 1, 2026 - Fifth Third Bancorp filed a 13F-HR form disclosing ownership of 267,101 shares of Mercury Systems, Inc. (US:MRCY) valued at $19,474,334 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 1,196 shares of Mercury Systems, Inc.. This represents a change in shares of 22,232.86% during the quarter. The current value of the position is $31,469,840 USD.

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)
2026-05-01 2026-03-31 13F MERCURY SYS COM 589378108 267,101 265,905 22,232.86 19,474 22,283.91 0.0356
2026-02-02 2025-12-31 13F MERCURY SYS COM 589378108 1,196 -55 -4.40 87 -9.37 0.0003
2025-11-07 2025-09-30 13F MERCURY SYS COM 589378108 1,251 6 0.48 97 43.28 0.0003
2025-07-15 2025-06-30 13F MERCURY SYS COM 589378108 1,245 -45 -3.49 67 21.82 0.0002
2025-04-15 2025-03-31 13F MERCURY SYS COM 589378108 1,290 451 53.75 56 57.14 0.0002
2025-01-21 2024-12-31 13F MERCURY SYS COM 589378108 839 -478 -36.29 35 -27.08 0.0001
2024-10-17 2024-09-30 13F MERCURY SYS COM 589378108 1,317 188 16.65 49 60.00 0.0002
2024-07-22 2024-06-30 13F MERCURY SYS COM 589378108 1,129 50 4.63 30 -3.23 0.0001
2024-04-23 2024-03-31 13F MERCURY SYS COM 589378108 1,079 -34 -3.05 32 -22.50 0.0001
2024-01-19 2023-12-31 13F MERCURY SYS COM 589378108 1,113 -126 -10.17 41 -11.11 0.0002
2023-10-31 2023-09-30 13F MERCURY SYS COM 589378108 1,239 120 10.72 46 18.42 0.0002
2023-07-26 2023-06-30 13F MERCURY SYS COM 589378108 1,119 118 11.79 39 -25.49 0.0002
2023-04-24 2023-03-31 13F MERCURY SYS COM 589378108 1,001 173 20.89 51 37.84 0.0002
2023-01-25 2022-12-31 13F MERCURY SYS COM 589378108 828 -119 -12.57 37 -2.63 0.0002
2022-10-25 2022-09-30 13F MERCURY SYS COM 589378108 947 -256 -21.28 38 -50.65 0.0002
2022-08-04 2022-06-30 13F MERCURY SYS COM 589378108 1,203 -25 -2.04 77 -2.53 0.0004
2022-04-19 2022-03-31 13F MERCURY SYS COM 589378108 1,228 -319 -20.62 79 -7.06 0.0003
2022-02-01 2021-12-31 13F MERCURY SYS COM 589378108 1,547 -68 -4.21 85 10.39 0.0003
2021-10-15 2021-09-30 13F MERCURY SYS COM 589378108 1,615 240 17.45 77 -15.38 0.0003
2021-08-06 2021-06-30 13F MERCURY SYS COM 589378108 1,375 39 2.92 91 -3.19 0.0004
2021-05-07 2021-03-31 13F MERCURY SYS COM 589378108 1,336 109 8.88 94 -12.96 0.0004
2021-02-16 2020-12-31 13F MERCURY SYS COM 589378108 1,227 292 31.23 108 50.00 0.0005
2020-11-09 2020-09-30 13F MERCURY SYS COM 589378108 935 53 6.01 72 4.35 0.0004
2020-08-05 2020-06-30 13F MERCURY SYS COM 589378108 882 -1,076 -54.95 69 -50.71 0.0004
2020-05-05 2020-03-31 13F MERCURY SYS COM 589378108 1,958 754 62.62 140 68.67 0.0010
2020-02-14 2019-12-31 13F MERCURY SYS COM 589378108 1,204 181 17.69 83 0.00 0.0005
2019-11-14 2019-09-30 13F MERCURY SYS COM 589378108 1,023 -75 -6.83 83 7.79 0.0005
2019-08-07 2019-06-30 13F MERCURY SYS COM 589378108 1,098 178 19.35 77 30.51 0.0005
2019-05-14 2019-03-31 13F MERCURY SYS COM 589378108 920 312 51.32 59 103.45 0.0004
2019-02-14 2018-12-31 13F MERCURY SYS COM 589378108 608 8 1.33 29 -12.12 0.0002
2018-11-14 2018-09-30 13F MERCURY SYS COM 589378108 600 -133 -18.14 33 17.86 0.0002
2018-08-14 2018-06-30 13F MERCURY SYS COM 589378108 733 283 62.89 28 27.27 0.0002
2018-05-15 2018-03-31 13F MERCURY SYS COM 589378108 450 -36 -7.41 22 -12.00 0.0001
2018-02-14 2017-12-31 13F MERCURY SYS COM 589378108 486 -6 -1.22 25 -3.85 0.0002
2017-11-14 2017-09-30 13F MERCURY SYS COM 589378108 492 317 181.14 26 271.43 0.0002
2017-08-11 2017-06-30 13F MERCURY SYS COM 589378108 175 -1,389 -88.81 7 -88.52 0.0001
2017-05-12 2017-03-31 13F MERCURY SYS COM 589378108 1,564 1,455 1,334.86 61 1,933.33 0.0005
2017-02-13 2016-12-31 13F/A-1 MERCURY SYS COM 589378108 109 0 0.00 3 0.00 0.0000
2017-02-09 2016-12-31 13F MERCURY SYS COM 589378108 109 0 3 0.0000
2016-11-10 2016-09-30 13F MERCURY SYS COM 589378108 109 -38 -25.85 3 -25.00 0.0000
2016-08-11 2016-06-30 13F MERCURY SYS COM 589378108 147 -18 -10.91 4 33.33 0.0000
2016-05-13 2016-03-31 13F MERCURY SYS COM 589378108 165 -591 -78.17 3 -78.57 0.0000
2016-02-16 2015-12-31 13F MERCURY SYS COM 589378108 756 2 0.27 14 16.67 0.0001
2015-11-13 2015-09-30 13F MERCURY SYS COM 589378108 754 695 1,177.97 12 1,100.00 0.0001
2015-08-14 2015-06-30 13F MERCURY SYS COM 589378108 59 1 1.72 1 0.00 0.0000
2015-05-14 2015-03-31 13F MERCURY SYS COM 589378108 58 58 0.00 1 0.0000
2014-11-17 2014-09-30 13F MERCURY SYS COM 589378108 0 -8 -100.00 0 0.0000
2014-08-14 2014-06-30 13F MERCURY SYS COM 589378108 8 8 0 0.0000
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.