Security record · archived quarter
MRCY
Mercury Systems, Inc. · Industrials · Aerospace & Defense
16Tracked holders
-1Δ holders
24.64MShares held
$1.91BReported value
+0New positions
−1Exits
Momentum inputs (comparable managers):
holder breadth -5.9% ·
share flow +3.3% ·
net new positions -6.2%
— formula
Concentrated accumulation — rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 109 | 0 | 43.26M | $5.28B | +9 | −9 |
| Q1 2026 | 112 | +6 | 43.16M | $3.14B | +15 | −9 |
| Q4 2025 | 105 | +1 | 43.71M | $3.19B | +2 | −1 |
| Q3 2025 | 16 | -1 | 24.64M | $1.91B | — | −1 |
| Q2 2025 | 14 | 0 | 21.38M | $1.15B | — | — |
| Q1 2025 | 11 | +1 | 6.72M | $289.56M | +1 | — |
| Q4 2024 | 10 | +2 | 6.46M | $271.35M | +2 | — |
| Q3 2024 | 7 | 0 | 2.69M | $99.43M | +2 | −2 |
| Q2 2024 | 7 | — | 4.36M | $117.73M | — | — |
Who holds it · Q3 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 8.48M | +2.8% | $656.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 8.48M | +2.8% | $656.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 8.48M | +2.8% | $656.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 8.48M | +2.8% | $656.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 8.48M | +2.8% | $656.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 8.48M | +2.8% | $656.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 8.48M | +2.8% | $656.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 8.48M | +2.8% | $656.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 8.48M | +2.8% | $656.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 8.48M | +2.8% | $656.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 8.48M | +2.8% | $656.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 8.48M | +2.8% | $656.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 8.48M | +2.8% | $656.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 8.48M | +2.8% | $656.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 8.48M | +2.8% | $656.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 16 | BlackRock ✦ (passive) | 8.48M | +2.8% | $656.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 8.48M | +2.8% | $656.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 18 | The Vanguard Group ✦ (passive) | 5.73M | +4.0% | $443.58M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 19 | The Vanguard Group ✦ (passive) | 5.73M | +4.0% | $443.58M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 20 | The Vanguard Group ✦ (passive) | 5.73M | +4.0% | $443.58M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 21 | The Vanguard Group ✦ (passive) | 5.73M | +4.0% | $443.58M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 22 | The Vanguard Group ✦ (passive) | 5.73M | +4.0% | $443.58M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 23 | State Street Global Advisors ✦ (passive) | 3.06M | -5.9% | $236.48M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 24 | Fidelity (FMR) ✦ | 1.48M | +26.9% | $114.82M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 25 | Fidelity (FMR) ✦ | 1.48M | +26.9% | $114.82M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 26 | Fidelity (FMR) ✦ | 1.48M | +26.9% | $114.82M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 27 | Geode Capital Management ✦ (passive) | 1.32M | +4.5% | $102.30M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 28 | Geode Capital Management ✦ (passive) | 1.32M | +4.5% | $102.30M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 29 | Goldman Sachs Group ✦ | 1.24M | — | $95.93M | 0.0% | n/c | 1 | SEC ↗ |
| 30 | Goldman Sachs Group ✦ | 1.24M | — | $95.93M | 0.0% | n/c | 1 | SEC ↗ |
| 31 | Goldman Sachs Group ✦ | 1.24M | — | $95.93M | 0.0% | n/c | 1 | SEC ↗ |
| 32 | Goldman Sachs Group ✦ | 1.24M | — | $95.93M | 0.0% | n/c | 1 | SEC ↗ |
| 33 | Morgan Stanley ✦ | 876.40K | — | $67.83M | 0.0% | n/c | 1 | SEC ↗ |
| 34 | Morgan Stanley ✦ | 876.40K | — | $67.83M | 0.0% | n/c | 1 | SEC ↗ |
| 35 | Morgan Stanley ✦ | 876.40K | — | $67.83M | 0.0% | n/c | 1 | SEC ↗ |
| 36 | Morgan Stanley ✦ | 876.40K | — | $67.83M | 0.0% | n/c | 1 | SEC ↗ |
| 37 | Morgan Stanley ✦ | 876.40K | — | $67.83M | 0.0% | n/c | 1 | SEC ↗ |
| 38 | Morgan Stanley ✦ | 876.40K | — | $67.83M | 0.0% | n/c | 1 | SEC ↗ |
| 39 | Morgan Stanley ✦ | 876.40K | — | $67.83M | 0.0% | n/c | 1 | SEC ↗ |
| 40 | Morgan Stanley ✦ | 876.40K | — | $67.83M | 0.0% | n/c | 1 | SEC ↗ |
| 41 | Morgan Stanley ✦ | 876.40K | — | $67.83M | 0.0% | n/c | 1 | SEC ↗ |
| 42 | Morgan Stanley ✦ | 876.40K | — | $67.83M | 0.0% | n/c | 1 | SEC ↗ |
| 43 | Morgan Stanley ✦ | 876.40K | — | $67.83M | 0.0% | n/c | 1 | SEC ↗ |
| 44 | Morgan Stanley ✦ | 876.40K | — | $67.83M | 0.0% | n/c | 1 | SEC ↗ |
| 45 | Morgan Stanley ✦ | 876.40K | — | $67.83M | 0.0% | n/c | 1 | SEC ↗ |
| 46 | Fisher Asset Management ✦ | 875.28K | +21.3% | $67.75M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 47 | T. Rowe Price ✦ | 866.08K | +1868.9% | $67.03M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 48 | T. Rowe Price ✦ | 866.08K | +1868.9% | $67.03M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 49 | JPMorgan Chase ✦ | 363.55K | — | $28.14M | 0.0% | n/c | 1 | SEC ↗ |
| 50 | JPMorgan Chase ✦ | 363.55K | — | $28.14M | 0.0% | n/c | 1 | SEC ↗ |
| 51 | JPMorgan Chase ✦ | 363.55K | — | $28.14M | 0.0% | n/c | 1 | SEC ↗ |
| 52 | JPMorgan Chase ✦ | 363.55K | — | $28.14M | 0.0% | n/c | 1 | SEC ↗ |
| 53 | JPMorgan Chase ✦ | 363.55K | — | $28.14M | 0.0% | n/c | 1 | SEC ↗ |
| 54 | JPMorgan Chase ✦ | 363.55K | — | $28.14M | 0.0% | n/c | 1 | SEC ↗ |
| 55 | Citadel Advisors ✦ | 150.57K | -49.3% | $11.65M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 56 | Two Sigma Investments ✦ | 73.03K | -52.7% | $5.65M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 57 | D. E. Shaw & Co. ✦ | 54.11K | -25.8% | $4.19M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 58 | D. E. Shaw & Co. ✦ | 54.11K | -25.8% | $4.19M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 59 | AQR Capital Management ✦ | 34.33K | +4.3% | $2.59M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 60 | AQR Capital Management ✦ | 34.33K | +4.3% | $2.59M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 61 | AQR Capital Management ✦ | 34.33K | +4.3% | $2.59M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 62 | AQR Capital Management ✦ | 34.33K | +4.3% | $2.59M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 63 | AQR Capital Management ✦ | 34.33K | +4.3% | $2.59M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 64 | Millennium Management ✦ | 22.35K | -95.6% | $1.73M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 65 | Gotham Asset Management ✦ | 18.45K | -56.9% | $1.43M | 0.0% | ▼ Trim | 4 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| Marshall Wace | $3.66M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 353 holders, 63.99M shares, $4.30B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Aug 24
Ballhaus William L
Officer, Director · 2.74K sh · $248,063
Aug 24
Ballhaus William L
Officer, Director · 105.47K sh · $9.44M
Aug 21
Ratner Steven
Officer · 356 sh · $32,524
Aug 21
KUPINSKY STUART
Officer · 1.00K sh · $95,230
Aug 21
Ballhaus William L
Officer, Director · 204 sh · $19,076
Aug 21
Ballhaus William L
Officer, Director · 64.80K sh · $5.99M
Aug 20
Farnsworth David E.
Officer · 6.61K sh · $645,817
Aug 20
Ratner Steven
Officer · 1.03K sh · $100,213
Aug 20
Ballhaus William L
Officer, Director · 22.01K sh · $2.15M
Aug 20
Munro Douglas
Officer · 109 sh · $10,646
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Jul 31
SC 13G — VANGUARD PORTFOLIO MANAGEMENT LLC
Jul 29
SC 13G/A — BlackRock, Inc.
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q3 2025 ·
Methodology ·
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