Mercury Systems, Inc.
US ˙ NasdaqGS ˙ US5893781089

SecurityMRCY / Mercury Systems, Inc.
InstitutionFranklin Resources Inc
Latest Disclosed Ownership453,633 shares
Latest Disclosed Value $ 33,074,382
Franklin Resources Inc reports 117.62% increase in ownership of MRCY / Mercury Systems, Inc.

On May 13, 2026 - Franklin Resources Inc filed a 13F-HR form disclosing ownership of 453,633 shares of Mercury Systems, Inc. (US:MRCY) valued at $33,074,382 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 208,449 shares of Mercury Systems, Inc.. This represents a change in shares of 117.62% during the quarter. The current value of the position is $53,447,040 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-13 2026-03-31 13F MERCURY SYS COM 589378108 453,633 245,184 117.62 33,074 117.33 0.0013
2026-02-11 2025-12-31 13F MERCURY SYS COM 589378108 208,449 184,458 768.86 15,219 719.94 0.0037
2025-11-13 2025-09-30 13F MERCURY SYS COM 589378108 23,991 6,281 35.47 1,857 94.75 0.0005
2025-08-12 2025-06-30 13F MERCURY SYS COM 589378108 17,710 17,710 954 0.0003
2022-02-11 2021-12-31 13F MERCURY SYS COM 589378108 0 -344,482 -100.00 0 -100.00
2021-11-12 2021-09-30 13F MERCURY SYS COM 589378108 344,482 -1,580,569 -82.11 16,336 -87.20 0.0062
2021-08-13 2021-06-30 13F MERCURY SYS COM 589378108 1,925,051 12,427 0.65 127,592 -5.58 0.0487
2021-05-13 2021-03-31 13F MERCURY SYS COM 589378108 1,912,624 74,894 4.08 135,128 -16.50 0.0550
2021-02-10 2020-12-31 13F MERCURY SYS COM 589378108 1,837,730 -346,040 -15.85 161,831 -4.33 0.0685
2020-11-12 2020-09-30 13F MERCURY SYS COM 589378108 2,183,770 451,484 26.06 169,155 24.16 0.0819
2020-08-13 2020-06-30 13F MERCURY SYS COM 589378108 1,732,286 647,118 59.63 136,244 75.99 0.0702
2020-05-13 2020-03-31 13F MERCURY SYS COM 589378108 1,085,168 -105,370 -8.85 77,416 -5.91 0.0517
2020-03-11 2019-12-31 13F/A-1 MERCURY SYS COM 589378108 1,190,538 242,421 25.57 82,278 6.91 0.0432
2020-02-12 2019-12-31 13F MERCURY SYS COM 589378108 1,190,538 242,421 82,278 10,392.8379
2019-11-14 2019-09-30 13F MERCURY SYS COM 589378108 948,117 57,656 6.47 76,958 22.85 0.0418
2019-08-14 2019-06-30 13F MERCURY SYS COM 589378108 890,461 -302,375 -25.35 62,644 -18.04 0.0333
2019-05-15 2019-03-31 13F/A-1 MERCURY SYS COM 589378108 1,192,836 -368,836 -23.62 76,437 3.50 0.0409
2019-05-14 2019-03-31 13F MERCURY SYS COM 589378108 1,192,836 -368,836 76,437
2019-02-12 2018-12-31 13F MERCURY SYS COM 589378108 1,561,672 -9,623 -0.61 73,851 -15.04 0.0446
2018-11-13 2018-09-30 13F MERCURY SYS COM 589378108 1,571,295 -52,314 -3.22 86,924 40.67 0.0433
2018-08-14 2018-06-30 13F MERCURY SYS COM 589378108 1,623,609 6,816 0.42 61,794 -20.90 0.0317
2018-05-10 2018-03-31 13F MERCURY SYS COM 589378108 1,616,793 159,025 10.91 78,123 4.36 0.0396
2018-02-14 2017-12-31 13F MERCURY SYS COM 589378108 1,457,768 257,918 21.50 74,857 20.26 0.0359
2017-11-13 2017-09-30 13F MERCURY SYS COM 589378108 1,199,850 69,331 6.13 62,248 30.82 0.0305
2017-08-10 2017-06-30 13F MERCURY SYS COM 589378108 1,130,519 -49,790 -4.22 47,583 3.24 0.0237
2017-05-12 2017-03-31 13F MERCURY SYS COM 589378108 1,180,309 -59,877 -4.83 46,091 22.98 0.0234
2017-02-14 2016-12-31 13F MERCURY SYS COM 589378108 1,240,186 -42,996 -3.35 37,478 18.87 0.0194
2016-11-14 2016-09-30 13F MERCURY SYS COM 589378108 1,283,182 -61,431 -4.57 31,528 -5.68 0.0165
2016-08-11 2016-06-30 13F MERCURY SYS COM 589378108 1,344,613 1,045,413 349.40 33,427 450.33 0.0180
2016-05-10 2016-03-31 13F MERCURY SYS COM 589378108 299,200 299,200 6,074 0.0032
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.