Manager × security

13D Management LLC MRCY holdings history

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MERCURY SYSTEMS INC · CUSIP 589378108 · CIK 1600133

This is the oldest quarter open without an account, so changes against the quarter before it are withheld. Sign in to see them.
Citable facts

As of 2026-06-30, 13D Management LLC reported 60.46K MRCY (shares), valued at $7.40M, or 10.37% of its reported non-derivative portfolio. Filed 2026-08-14.

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Portfolio weight and quantity history
Reported portfolio weight
10.37%
Shares
60.46K
60,462
Reported value
$7.40M
USD

Shares unchanged; reported value increased 67.78%, and weight changed +3.54 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.

Left: % · Right: Shares · Independently scaled axes

Exact data and methodology

Axes scale independently; a crossing does not mean equal values. Weight uses each quarter's total reported non-derivative value. Same CUSIP; missing quarters are gaps, not zero. Revised history may include later disclosures.

QuarterWeightQuantitySource
Q2 202610.37%60,462SEC filing ↗Filed Aug 14, 2026
Q1 20266.83%60,462SEC filing ↗Filed May 15, 2026
Q4 20259.01%103,762SEC filing ↗Filed Feb 17, 2026
Q3 202510.17%137,012SEC filing ↗Filed Nov 14, 2025
Q2 20256.73%137,012SEC filing ↗Filed Aug 14, 2025
Q1 20257.70%202,701SEC filing ↗Filed May 15, 2025
Q4 20246.88%221,015SEC filing ↗Filed Feb 14, 2025
Q3 20243.57%131,508SEC filing ↗Filed Nov 14, 2024
Q2 20242.59%131,286SEC filing ↗Filed Aug 14, 2024
Q1 20242.90%161,166SEC filing ↗Filed May 15, 2024
Q4 20233.46%160,986SEC filing ↗Filed Feb 14, 2024
Q3 20234.60%199,269SEC filing ↗Filed Nov 14, 2023

History & evidence by quarter

QuarterWeightQuantityValueChange explainedSource
Q3 20234.60%199,269$7.39MThe prior quarter is outside the free window. Sign in for the comparison.SEC filing ↗
Filed Nov 14, 2023
Q4 20233.46%160,986$5.89MShares decreased 19.21%; reported value decreased 20.34%, and weight changed -1.14 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Feb 14, 2024
Q1 20242.90%161,166$4.75MShares increased 0.11%; reported value decreased 19.24%, and weight changed -0.56 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed May 15, 2024
Q2 20242.59%131,286$3.54MShares decreased 18.54%; reported value decreased 25.47%, and weight changed -0.31 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Aug 14, 2024
Q3 20243.57%131,508$4.87MShares increased 0.17%; reported value increased 37.32%, and weight changed +0.98 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Nov 14, 2024
Q4 20246.88%221,015$9.28MShares increased 68.06%; reported value increased 90.77%, and weight changed +3.31 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Feb 14, 2025
Q1 20257.70%202,701$8.73MShares decreased 8.29%; reported value decreased 5.91%, and weight changed +0.82 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed May 15, 2025
Q2 20256.73%137,012$7.38MShares decreased 32.41%; reported value decreased 15.51%, and weight changed -0.97 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Aug 14, 2025
Q3 202510.17%137,012$10.60MShares unchanged; reported value increased 43.71%, and weight changed +3.44 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Nov 14, 2025
Q4 20259.01%103,762$7.58MShares decreased 24.27%; reported value decreased 28.56%, and weight changed -1.16 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Feb 17, 2026
Q1 20266.83%60,462$4.41MShares decreased 41.73%; reported value decreased 41.81%, and weight changed -2.18 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed May 15, 2026
Q2 202610.37%60,462$7.40MShares unchanged; reported value increased 67.78%, and weight changed +3.54 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing ↗
Filed Aug 14, 2026
13D Management LLC · MERCURY SYSTEMS INC

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

13F reports quarter-end long positions in securities traded on US exchanges, filed by managers holding at least $100 million of such securities; it is not the manager's full portfolio, not assets under management, and value changes are not returns. Weights use the reported total value as denominator. Option rows show notional value, not premium or net exposure. Amendments are merged into the quarter when Akkru could match them.