Mercury Systems, Inc.
US ˙ NasdaqGS ˙ US5893781089

SecurityMRCY / Mercury Systems, Inc.
InstitutionBessemer Group Inc
Latest Disclosed Ownership449,689 shares
Latest Disclosed Value $ 32,787
Bessemer Group Inc reports 12.56% increase in ownership of MRCY / Mercury Systems, Inc.

On May 6, 2026 - Bessemer Group Inc filed a 13F-HR form disclosing ownership of 449,689 shares of Mercury Systems, Inc. (US:MRCY) valued at $32,786,825 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 399,496 shares of Mercury Systems, Inc.. This represents a change in shares of 12.56% during the quarter. The current value of the position is $50,180,796 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)
2026-05-06 2026-03-31 13F MERCURY COMPUTER SYS COM SC 589378108 449,689 50,193 12.56 33 10.34 0.0515
2026-02-05 2025-12-31 13F MERCURY COMPUTER SYS COM SC 589378108 399,496 125,194 45.64 29 38.10 0.0448
2025-11-05 2025-09-30 13F MERCURY COMPUTER SYS COM SC 589378108 274,302 274,070 118,133.62 21 0.0325
2025-08-01 2025-06-30 13F MERCURY COMPUTER SYS COM SC 589378108 232 62 36.47 0 0.0000
2025-04-23 2025-03-31 13F MERCURY COMPUTER SYS COM SC 589378108 170 -7 -3.95 0 0.0000
2025-02-13 2024-12-31 13F MERCURY COMPUTER SYS COM SC 589378108 177 104 142.47 0 0.0000
2024-11-12 2024-09-30 13F MERCURY COMPUTER SYS COM SC 589378108 73 -18 -19.78 0 0.0000
2024-08-13 2024-06-30 13F MERCURY COMPUTER SYS COM SC 589378108 91 91 0 0.0000
2024-08-13 2024-03-31 13F/A-1 MERCURY COMPUTER SYS COM SC 589378108 0 -5 -100.00 0 0.0000
2024-05-13 2024-03-31 13F MERCURY COMPUTER SYS COM SC 589378108 0 0
2024-02-09 2023-12-31 13F MERCURY COMPUTER SYS COM SC 589378108 5 -96 -95.05 0 0.0000
2023-11-13 2023-09-30 13F MERCURY COMPUTER SYS COM SC 589378108 101 -31 -23.48 0 0.0000
2023-08-10 2023-06-30 13F MERCURY COMPUTER SYS COM SC 589378108 132 48 57.14 0 0.0000
2023-05-10 2023-03-31 13F MERCURY COMPUTER SYS COM SC 589378108 84 -4 -4.55 0 0.0000
2023-02-13 2022-12-31 13F MERCURY COMPUTER SYS COM SC 589378108 88 0 0.00 0 -100.00 0.0000
2022-11-09 2022-09-30 13F MERCURY COMPUTER SYS COM SC 589378108 88 -110,737 -99.92 3 -99.96 0.0000
2022-08-10 2022-06-30 13F MERCURY COMPUTER SYS COM SC 589378108 110,825 110,820 2,216,400.00 7,130 0.0178
2022-05-12 2022-03-31 13F MERCURY COMPUTER SYS COM SC 589378108 5 -230 -97.87 0 -100.00
2022-01-27 2021-12-31 13F MERCURY COMPUTER SYS COM SC 589378108 235 10 4.44 13 18.18 0.0000
2021-11-12 2021-09-30 13F MERCURY COMPUTER SYS COM SC 589378108 225 -225 -50.00 11 -63.33 0.0000
2021-08-06 2021-06-30 13F MERCURY COMPUTER SYS COM SC 589378108 450 -1,287 -74.09 30 -75.61 0.0001
2021-05-13 2021-03-31 13F MERCURY COMPUTER SYS COM SC 589378108 1,737 487 38.96 123 11.82 0.0003
2021-02-09 2020-12-31 13F MERCURY COMPUTER SYS COM SC 589378108 1,250 -806 -39.20 110 -30.82 0.0003
2020-11-12 2020-09-30 13F MERCURY COMPUTER SYS COM SC 589378108 2,056 -944 -31.47 159 -32.63 0.0005
2020-08-05 2020-06-30 13F MERCURY COMPUTER SYS COM SC 589378108 3,000 3,000 236 0.0007
2019-07-19 2019-06-30 13F MERCURY COMPUTER SYS COM SC 589378108 0 0 0 0.0000
2016-05-11 2016-03-31 13F MERCURY COMPUTER SYS COM SC 589378108 0 -400 -100.00 0 -100.00
2016-02-12 2015-12-31 13F MERCURY COMPUTER SYS COM SC 589378108 400 400 7 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.