Mercury Systems, Inc.
US ˙ NasdaqGS ˙ US5893781089

SecurityMRCY / Mercury Systems, Inc.
InstitutionSquarepoint Ops LLC
Latest Disclosed Ownership21,571 shares
Latest Disclosed Value $ 1,572,742
Squarepoint Ops LLC ownership in MRCY / Mercury Systems, Inc.

On May 15, 2026 - Squarepoint Ops LLC filed a 13F-HR form disclosing ownership of 21,571 shares of Mercury Systems, Inc. (US:MRCY) valued at $1,572,742 USD as of March 31, 2026. The entity filed a previous 13F-HR on November 14, 2025 disclosing 0 shares of Mercury Systems, Inc.. The current value of the position is $2,541,495 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)
2026-05-15 2026-03-31 13F MERCURY SYS COM 589378108 21,571 21,571 1,573 0.0018
2025-11-14 2025-09-30 13F MERCURY SYS COM 589378108 0 -45,871 -100.00 0 -100.00
2025-08-27 2025-06-30 13F/A-1 MERCURY SYS COM 589378108 45,871 36,807 406.08 2,471 533.33 0.0026
2025-08-14 2025-06-30 13F MERCURY SYS COM 589378108 45,871 36,807 2,471 0.0026
2025-08-27 2025-03-31 13F/A-1 MERCURY SYS COM 589378108 9,064 9,064 391 0.0005
2025-05-15 2025-03-31 13F MERCURY SYS COM 589378108 9,064 9,064 391 0.0005
2025-02-14 2024-12-31 13F MERCURY SYS COM 589378108 0 -25,619 -100.00 0 -100.00
2024-11-14 2024-09-30 13F MERCURY SYS COM 589378108 25,619 -40,590 -61.31 948 -46.98 0.0015
2024-08-14 2024-06-30 13F MERCURY SYS COM 589378108 66,209 18,316 38.24 1,787 26.49 0.0030
2024-05-15 2024-03-31 13F MERCURY SYS COM 589378108 47,893 47,893 1,413 0.0024
2024-02-14 2023-12-31 13F MERCURY SYS COM 589378108 0 -15,332 -100.00 0 -100.00
2023-11-14 2023-09-30 13F MERCURY SYS COM 589378108 15,332 -65,867 -81.12 569 -79.77 0.0014
2023-08-14 2023-06-30 13F MERCURY SYS COM 589378108 81,199 53,730 195.60 2,809 100.00 0.0086
2023-05-15 2023-03-31 13F MERCURY SYS COM 589378108 27,469 20,564 297.81 1,404 355.84 0.0057
2023-02-14 2022-12-31 13F MERCURY SYS COM 589378108 6,905 6,905 309 0.0012
2022-11-14 2022-09-30 13F MERCURY SYS COM 589378108 0 -8,669 -100.00 0 -100.00
2022-08-15 2022-06-30 13F MERCURY SYS COM 589378108 8,669 -6,503 -42.86 558 -42.94 0.0031
2022-05-16 2022-03-31 13F MERCURY SYS COM 589378108 15,172 -65,004 -81.08 978 -77.84 0.0042
2022-02-14 2021-12-31 13F MERCURY SYS COM 589378108 80,176 -5,371 -6.28 4,414 8.80 0.0117
2021-11-15 2021-09-30 13F MERCURY SYS COM 589378108 85,547 77,027 904.07 4,057 618.05 0.0117
2021-08-16 2021-06-30 13F MERCURY SYS COM 589378108 8,520 4,283 101.09 565 88.96 0.0021
2021-05-17 2021-03-31 13F MERCURY SYS COM 589378108 4,237 -2,126 -33.41 299 -46.61 0.0018
2021-02-16 2020-12-31 13F MERCURY SYS COM 589378108 6,363 -123,662 -95.11 560 -94.44 0.0042
2020-11-16 2020-09-30 13F MERCURY SYS COM 589378108 130,025 89,707 222.50 10,072 217.63 0.1357
2020-08-14 2020-06-30 13F MERCURY SYS COM 589378108 40,318 12,518 45.03 3,171 59.91 0.0513
2020-05-15 2020-03-31 13F MERCURY SYS COM 589378108 27,800 6,410 29.97 1,983 34.17 0.0507
2020-02-14 2019-12-31 13F MERCURY SYS COM 589378108 21,390 -17,731 -45.32 1,478 -53.45 0.0088
2019-11-14 2019-09-30 13F MERCURY SYS COM 589378108 39,121 39,121 3,175 0.0283
2019-08-14 2019-06-30 13F MERCURY SYS COM 589378108 0 -12,833 -100.00 0 -100.00
2019-05-15 2019-03-31 13F MERCURY SYS COM 589378108 12,833 12,833 822 0.0087
2018-05-15 2018-03-31 13F MERCURY SYS COM 589378108 0 -4,385 -100.00 0 -100.00
2018-02-14 2017-12-31 13F MERCURY SYS COM 589378108 4,385 -3,496 -44.36 225 -44.99 0.0039
2017-11-14 2017-09-30 13F MERCURY SYS COM 589378108 7,881 1,680 27.09 409 56.70 0.0079
2017-08-14 2017-06-30 13F MERCURY SYS COM 589378108 6,201 6,201 261 0.0051
2017-02-14 2016-12-31 13F MERCURY SYS COM 589378108 0 -12,303 -100.00 0 -100.00
2016-11-14 2016-09-30 13F MERCURY SYS COM 589378108 12,303 12,303 302 0.0200
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.