Mercury SystemsMRCY
13F holders, Q3 2024 (September 30)245holders +13
33new positions
23sold out
4famous investors
$36.99avg. 13F price*
At the end of Q3 2024, 245 institutions reported holding Mercury Systems Inc. (MRCY) in their 13F filings, up 13 from Q2 2024. 33 opened new positions and 23 sold out. The largest holders were BlackRock, Inc. ($321.0M), William Blair Investment Management, LLC ($270.1M) and JANA Partners Management, LP ($256.8M). 4 famous investors held it, including Ron Baron (0.1% of Baron Capital (BAMCO)'s portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- Mercury Systems Inc.
- CUSIP
- 589378108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2024 → Q3 2024
| Institutions | Total Value | |
|---|---|---|
| New Positions | 33 | $66.9M |
| Exits | 23 | $87.1M |
All 13F filers, Q2 2024 → Q3 2024: 5,501,017 shares bought and 7,135,300 shares sold, net −1,634,283 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 245 holders
| BlackRock, Inc. | 0.01% | — | 8,675,792 | $321.0M |
| William Blair Investment Management, LLC | 0.67% | Add +13.8% | 7,299,512 | $270.1M |
| JANA Partners Management, LP | 14.45% | Add +0.2% | 6,941,565 | $256.8M |
| Vanguard Group Inc. | 0.00% | Reduce -3.6% | 5,509,286 | $203.8M |
| State Street Corp. | 0.00% | Reduce -3.9% | 3,198,434 | $118.3M |
| Dimensional Fund Advisors LP | 0.02% | Add +6.0% | 2,149,399 | $79.5M |
| Victory Capital Management Inc. | 0.06% | Reduce -2.7% | 1,765,384 | $65.3M |
| Conestoga Capital Advisors, LLC | 0.67% | Add +1.6% | 1,329,265 | $49.2M |
| Geode Capital Management, LLC | 0.00% | Reduce -0.3% | 1,271,200 | $47.0M |
| Segall Bryant & Hamill, LLC | 0.64% | Reduce -3.2% | 1,268,875 | $46.9M |
| Snyder Capital Management L P | 0.96% | Add +8.4% | 1,243,815 | $46.0M |
| Baron Capital (BAMCO) | 0.12% | No change | 1,205,654 | $44.6M |
| Fuller & Thaler Asset Management, Inc. | 0.18% | Reduce -1.7% | 1,205,451 | $44.6M |
| Neuberger Berman Group LLC | 0.03% | Add +7.7% | 1,077,219 | $39.9M |
| T. Rowe Price Investment Management, Inc. | 0.02% | New | 805,653 | $29.8M |
| Westwood Holdings Group Inc. | 0.23% | Reduce -45.6% | 787,788 | $29.1M |
| Royal Bank of Canada | 0.01% | Reduce -5.3% | 762,361 | $28.2M |
| Scopia Capital Management LP | 5.19% | Reduce -48.0% | 679,143 | $25.1M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +1.5% | 658,833 | $24.4M |
| First Trust Advisors LP | 0.02% | Add +1944.1% | 655,827 | $24.3M |
| Invesco Ltd. | 0.00% | Add +2.1% | 594,114 | $22.0M |
| Northern Trust Corp. | 0.00% | Add +60.6% | 576,781 | $21.3M |
| Goldman Sachs Group Inc. | 0.00% | Add +37.5% | 553,970 | $20.5M |
| Morgan Stanley | 0.00% | Reduce -31.5% | 551,604 | $20.4M |
| Bank of America Corp. | 0.00% | Add +141.4% | 518,923 | $19.2M |
| Aristotle Capital Boston, LLC | 0.62% | Reduce -3.8% | 504,740 | $18.7M |
| Staley Capital Advisers Inc. | 0.82% | Reduce -0.6% | 494,870 | $18.3M |
| Two Sigma Investments, LP | 0.04% | Add +24.4% | 475,020 | $17.6M |
| WCM Investment Management, LLC | 0.04% | Add +0.1% | 450,131 | $16.9M |
| Mesirow Institutional Investment Management, Inc. | 1.23% | Add +16.8% | 436,548 | $16.2M |
| Marshall Wace, LLP | 0.02% | Add +247.3% | 416,242 | $15.4M |
| Sasco Capital Inc. / CT/ | 2.08% | Reduce -33.0% | 376,170 | $13.9M |
| Bank of New York Mellon Corp | 0.00% | Reduce -37.6% | 353,955 | $13.1M |
| Ameriprise Financial Inc. | 0.00% | Reduce -6.2% | 345,670 | $12.8M |
| Millennium Management | 0.01% | New | 345,614 | $12.8M |
| Crestline Management, L.P. | 0.55% | Reduce -45.8% | 259,681 | $9.6M |
| Loomis Sayles & Co. L P | 0.01% | Reduce -3.8% | 251,908 | $9.3M |
| Principal Financial Group Inc. | 0.00% | Reduce -7.6% | 238,368 | $8.8M |
| Two Sigma Advisers, LP | 0.02% | Reduce -7.3% | 237,200 | $8.8M |
| Nuveen Asset Management, LLC | 0.00% | Reduce -0.4% | 225,511 | $8.3M |
| Royce & Associates LP | 0.07% | Add +0.9% | 221,279 | $8.2M |
| Van Eck Associates Corp. | 0.01% | Add +28.1% | 219,855 | $7.4M |
| Kennedy Capital Management LLC | 0.15% | New | 188,822 | $7.0M |
| Barclays PLC | 0.00% | Add +471.3% | 175,562 | $6.5M |
| Trexquant Investment LP | 0.08% | Add +133.9% | 166,801 | $6.2M |
| Legal & General Group Plc | 0.00% | Add +1.9% | 166,695 | $6.2M |
| Prelude Capital Management, LLC | 0.46% | Reduce -38.9% | 162,294 | $6.0M |
| Rhumbline Advisers | 0.01% | Reduce -3.9% | 161,355 | $6.0M |
| Blair William & Co. | 0.02% | Add +103.4% | 157,193 | $5.8M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.01% | Add +139.9% | 140,755 | $5.2M |
| 13D Management LLC | 3.57% | Add +0.2% | 131,508 | $4.9M |
| Sei Investments Co. | 0.01% | Reduce -53.1% | 131,083 | $4.9M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -3.7% | 126,572 | $4.7M |
| Comerica Bank | 0.02% | Reduce -1.3% | 124,435 | $4.6M |
| Brandywine Global Investment Management, LLC | 0.03% | Reduce -31.5% | 128,411 | $4.6M |
| Citigroup Inc. | 0.00% | Add +15.3% | 110,383 | $4.1M |
| King Luther Capital Management Corp. | 0.02% | Add +0.8% | 109,045 | $4.0M |
| Public Sector Pension Investment Board | 0.02% | Reduce -6.8% | 107,099 | $4.0M |
| Roubaix Capital, LLC | 2.17% | Reduce -22.0% | 106,411 | $3.9M |
| Swiss National Bank | 0.00% | Reduce -0.7% | 98,500 | $3.6M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.01% | Reduce -15.3% | 96,565 | $3.6M |
| Raymond James & Associates | 0.00% | Add +40.0% | 93,454 | $3.5M |
| Boothbay Fund Management, LLC | 0.11% | Reduce -48.7% | 89,841 | $3.3M |
| HRT Financial LP | 0.02% | New | 87,088 | $3.2M |
| CenterBook Partners LP | 0.19% | Reduce -69.9% | 83,545 | $3.1M |
| B. Metzler seel. Sohn & Co. Holding AG | 0.03% | — | 76,501 | $2.8M |
| B. Metzler seel. Sohn & Co. AG | 0.03% | No change | 76,501 | $2.8M |
| D. E. Shaw & Co. | 0.00% | Reduce -63.4% | 75,440 | $2.8M |
| Redwood Investment Management, LLC | 0.24% | Reduce -33.2% | 72,362 | $2.7M |
| M&T Bank Corp | 0.01% | Add +12.3% | 71,218 | $2.6M |
| Mutual of America Capital Management LLC | 0.03% | Reduce -2.3% | 66,765 | $2.5M |
| Steel Partners Holdings L.P. | 3.03% | No change | 66,543 | $2.5M |
| Alliancebernstein L.P. | 0.00% | Reduce -3.4% | 66,135 | $2.4M |
| Citadel Advisors | 0.00% | New | 64,085 | $2.4M |
| New York State Teachers Retirement System | 0.00% | Reduce -2.3% | 60,211 | $2.2M |
| State of Wisconsin Investment Board | 0.01% | Reduce -10.7% | 60,080 | $2.2M |
| Cerity Partners LLC | 0.00% | Add +2.9% | 58,174 | $2.2M |
| Prudential Financial Inc. | 0.00% | Reduce -8.8% | 52,890 | $2.0M |
| Deutsche Bank AG | 0.00% | Add +14.2% | 52,085 | $1.9M |
| ExodusPoint Capital Management, LP | 0.02% | Reduce -41.3% | 51,963 | $1.9M |
| CANADA LIFE ASSURANCE Co | 0.00% | Reduce -5.8% | 50,023 | $1.8M |
| California State Teachers Retirement System | 0.00% | Reduce -3.0% | 48,040 | $1.8M |
| BNP Paribas Financial Markets | 0.00% | Reduce -6.8% | 47,586 | $1.8M |
| LPL Financial LLC | 0.00% | Add +17.7% | 47,358 | $1.8M |
| JPMorgan Chase & Co. | 0.00% | Add +3.9% | 46,220 | $1.7M |
| Moody National Bank Trust Division | 0.18% | Add +16.3% | 45,835 | $1.7M |
| Zions Bancorporation, N.A. | 0.12% | Add +17.1% | 43,834 | $1.6M |
| Public Employees Retirement System of Ohio | 0.01% | Reduce -19.8% | 42,340 | $1.6M |
| Ironwood Investment Management LLC | 0.73% | Reduce -0.1% | 40,694 | $1.5M |
| Thrivent Financial for Lutherans | 0.00% | Reduce -8.5% | 39,654 | $1.5M |
| Wells Fargo & Company | 0.00% | Add +9.5% | 39,647 | $1.5M |
| T. Rowe Price Associates Inc. | 0.00% | Add +0.6% | 39,524 | $1.5M |
| Oppenheimer & Co. Inc. | 0.02% | Add +6.8% | 39,528 | $1.5M |
| Aquatic Capital Management LLC | 0.04% | Add +264.4% | 36,800 | $1.4M |
| Jane Street Group, LLC | 0.00% | Add +122.1% | 35,475 | $1.3M |
| Needham Investment Management LLC | 0.10% | Reduce -60.0% | 35,000 | $1.3M |
| UBS Group AG | 0.00% | Add +181.7% | 34,896 | $1.3M |
| Sherbrooke Park Advisers LLC | 0.29% | New | 34,387 | $1.3M |
| Eisler Capital (US) LLC | 0.23% | New | 34,000 | $1.3M |
| MetLife Investment Management, LLC | 0.01% | Add +129.1% | 31,667 | $1.2M |
| American Century Companies Inc. | 0.00% | Add +74.0% | 31,523 | $1.2M |
| Manufacturers Life Insurance Company, The | 0.00% | Add +7.0% | 31,483 | $1.2M |
| Corebridge Financial, Inc. | 0.01% | Reduce -1.2% | 31,295 | $1.2M |
| State of Alaska, Department of Revenue | 0.01% | Reduce -6.0% | 28,816 | $1.1M |
| Illinois Municipal Retirement Fund | 0.02% | Reduce -2.3% | 28,576 | $1.1M |
| Vident Advisory, LLC | 0.03% | Reduce -0.3% | 27,661 | $1.0M |
| Holocene Advisors, LP | 0.00% | New | 27,366 | $1.0M |
| Squarepoint Ops LLC | 0.00% | Reduce -61.3% | 25,619 | $948K |
| RBF Capital, LLC | 0.05% | Reduce -16.7% | 25,000 | $925K |
| TD Asset Management Inc | 0.00% | New | 24,400 | $915K |
| Louisiana State Employees Retirement System | 0.02% | Reduce -7.2% | 24,400 | $903K |
| Janus Henderson Group PLC | 0.00% | No change | 24,025 | $889K |
| Deerfield Management Company, L.P. | 0.01% | Add +125.7% | 23,851 | $882K |
| XTX Topco Ltd | 0.06% | New | 23,167 | $857K |
| Quantbot Technologies LP | 0.03% | Add +252.9% | 22,964 | $850K |
| Hunter Perkins Capital Management, LLC | 0.16% | Reduce -13.5% | 21,856 | $809K |
| South Dakota Investment Council | 0.02% | No change | 21,678 | $802K |
| Susquehanna International Group, LLP | 0.00% | Reduce -59.7% | 20,010 | $740K |
| Ensign Peak Advisors, Inc | 0.00% | No change | 20,002 | $740K |
| Yousif Capital Management, LLC | 0.01% | Reduce -6.5% | 19,624 | $726K |
| Teachers Retirement System of the State of Kentucky | 0.01% | No change | 19,640 | $726K |
| PEAK6 Investments LLC | 0.03% | New | 18,538 | $686K |
| Teza Capital Management LLC | 0.07% | New | 18,121 | $670K |
| State of Wyoming | 0.10% | Add +45.5% | 18,027 | $667K |
| Voya Investment Management LLC | 0.00% | Reduce -3.0% | 17,784 | $658K |
| Maryland State Retirement & Pension System | 0.01% | Reduce -6.3% | 17,052 | $631K |
| Altfest L J & Co. Inc. | 0.08% | Add +44.3% | 16,849 | $623K |
| New York State Common Retirement Fund | 0.00% | Reduce -46.3% | 16,257 | $602K |
| Camelot Portfolios, LLC | 0.58% | Reduce -43.1% | 16,000 | $592K |
| Amalgamated Bank | 0.00% | Reduce -5.7% | 15,130 | $560K |
| Natixis Advisors, LLC | 0.00% | Add +18.1% | 14,686 | $543K |
| Arizona State Retirement System | 0.00% | Add +2.8% | 14,525 | $537K |
| Mitsubishi UFJ Asset Management Co., Ltd. | 0.00% | Reduce -1.3% | 14,462 | $535K |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 14,269 | $528K |
| State of Tennessee, Department of Treasury | 0.00% | Reduce -5.8% | 13,221 | $489K |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.00% | No change | 12,900 | $477K |
| Pathstone Holdings, LLC | 0.00% | Add +50.3% | 12,386 | $458K |
| Rafferty Asset Management, LLC | 0.00% | Reduce -0.1% | 12,345 | $457K |
| Lombard Odier Asset Management (USA) Corp | 0.20% | Reduce -14.1% | 12,224 | $452K |
| Intech Investment Management LLC | 0.01% | New | 12,212 | $452K |
| Allianz Asset Management GmbH | 0.00% | Reduce -43.3% | 12,200 | $451K |
| Oregon Public Employees Retirement Fund | 0.01% | Reduce -6.3% | 11,862 | $439K |
| Verition Fund Management LLC | 0.00% | New | 11,449 | $424K |
| LaFleur & Godfrey LLC | 0.06% | Reduce -64.9% | 11,375 | $421K |
| ProShare Advisors LLC | 0.00% | New | 11,353 | $420K |
| Corton Capital Inc. | 0.20% | New | 11,260 | $417K |
| Quantinno Capital Management LP | 0.01% | Add +15.4% | 11,096 | $411K |
| Envestnet Asset Management Inc. | 0.00% | Reduce -2.1% | 10,951 | $405K |
| Gabelli Funds LLC | 0.00% | Reduce -15.9% | 10,809 | $400K |
| Commonwealth of Pennsylvania Public School Empls Retrmt SYS | 0.00% | Reduce -4.1% | 10,793 | $399K |
| Hennion & Walsh Asset Management, Inc. | 0.02% | Reduce -3.5% | 10,739 | $397K |
| Bank of Montreal | 0.00% | Reduce -51.3% | 10,465 | $392K |
| Keybank National Association | 0.00% | Add +0.4% | 10,358 | $383K |
| Yarbrough Capital, LLC | 0.02% | New | 9,991 | $370K |
| Creative Planning | 0.00% | Add +22.8% | 9,788 | $362K |
| Cwm, LLC | 0.00% | Reduce -14.9% | 9,778 | $362K |
| Iridian Asset Management LLC | 0.08% | Add +1.0% | 9,556 | $354K |
| Cresset Asset Management, LLC | 0.00% | New | 8,274 | $306K |
| Cim Investment Management Inc. | 0.09% | No change | 8,072 | $299K |
| Gsa Capital Partners LLP | 0.02% | New | 7,824 | $289K |
| Moors & Cabot, Inc. | 0.01% | New | 7,550 | $279K |
| Jefferies Financial Group Inc. | 0.00% | New | 7,507 | $278K |
| Public Employees Retirement Association of Colorado | 0.00% | No change | 7,486 | $277K |
| Verity Asset Management, Inc. | 0.10% | New | 7,402 | $274K |
| Tower Research Capital LLC (TRC) | 0.01% | Add +2425.1% | 7,348 | $272K |
| Glenmede Trust Co. NA | 0.00% | New | 6,916 | $256K |
| Pictet Asset Management Holding SA | 0.00% | New | 6,766 | $250K |
| Stifel Financial Corp. | 0.00% | New | 6,651 | $246K |
| Corient Private Wealth LP | 0.00% | New | 6,592 | $244K |
| Schonfeld Strategic Advisors LLC | 0.00% | Reduce -80.3% | 6,350 | $235K |
| Johnson Investment Counsel Inc. | 0.00% | New | 6,086 | $225K |
| Y-Intercept (Hong Kong) Ltd | 0.01% | New | 5,910 | $219K |
| DekaBank Deutsche Girozentrale | 0.00% | Add +13.6% | 5,826 | $217K |
| Ameritas Investment Partners, Inc. | 0.01% | No change | 5,371 | $199K |
| Lazard Asset Management LLC | 0.00% | No change | 5,131 | $189K |
| nVerses Capital, LLC | 0.06% | Add +16.7% | 3,500 | $130K |
| CIBC Private Wealth Group LLC | 0.00% | No change | 3,435 | $127K |
| FMR LLC | 0.00% | Add +46.5% | 3,067 | $113K |
| Harel Insurance Investments & Financial Services Ltd. | 0.00% | Add +24.4% | 2,953 | $109K |
| PNC Financial Services Group, Inc. | 0.00% | Reduce -1.1% | 2,461 | $91K |
| Peregrine Capital Management LLC | 0.00% | No change | 2,134 | $79K |
| Covestor Ltd | 0.05% | Add +41.2% | 2,124 | $78K |
| Osaic Holdings, Inc. | 0.00% | Reduce -56.1% | 2,031 | $75K |
| Walleye Capital LLC | 0.00% | Reduce -82.2% | 1,703 | $63K |
| KBC Group NV | 0.00% | No change | 1,671 | $62K |
| Nisa Investment Advisors, LLC | 0.00% | Add +43.2% | 1,668 | $62K |
| US Bancorp \de | 0.00% | Reduce -4.8% | 1,580 | $58K |
| Catalyst Funds Management Pty Ltd | 0.01% | New | 1,500 | $56K |
| Ridgewood Investments LLC | 0.02% | No change | 1,350 | $50K |
| Fifth Third Bancorp | 0.00% | Add +16.6% | 1,317 | $49K |
| Quadrant Capital Group LLC | 0.00% | Reduce -6.9% | 1,210 | $45K |
| Aster Capital Management (DIFC) Ltd | 0.01% | — | 1,139 | $42K |
| Hilltop National Bank | 0.01% | Reduce -6.6% | 959 | $35K |
| GHP Investment Advisors, Inc. | 0.00% | No change | 700 | $26K |
| Signaturefd, LLC | 0.00% | Add +144.0% | 666 | $25K |
| EverSource Wealth Advisors, LLC | 0.00% | No change | 646 | $24K |
| Allworth Financial LP | 0.00% | Reduce -2.8% | 629 | $23K |
| GAMMA Investing LLC | 0.00% | Add +76.8% | 610 | $23K |
| Venturi Wealth Management, LLC | 0.00% | Add +785.1% | 593 | $22K |
| Group One Trading LLC | 0.00% | Reduce -33.6% | 591 | $22K |
| Barrow Hanley Mewhinney & Strauss LLC | 0.00% | New | 582 | $22K |
| Whittier Trust Co. | 0.00% | Reduce -45.3% | 554 | $20K |
| Coston, McIsaac & Partners | 0.00% | No change | 396 | $14K |
| Leonteq Securities AG | 0.00% | No change | 361 | $13K |
| Towarzystwo Funduszy Inwestycyjnych Pzu SA | 0.00% | No change | 360 | $13K |
| Smartleaf Asset Management LLC | 0.00% | Add +21.3% | 262 | $10K |
| Blue Trust, Inc. | 0.00% | Add +36.8% | 346 | $9K |
| Sterling Capital Management LLC | 0.00% | — | 190 | $7K |
| LRI Investments, LLC | 0.00% | No change | 158 | $6K |
| Parallel Advisors, LLC | 0.00% | Reduce -15.4% | 170 | $6K |
| UMB Bank, n.a. | 0.00% | Add +98.7% | 153 | $6K |
| NewEdge Advisors, LLC | 0.00% | No change | 150 | $6K |
| Lindbrook Capital, LLC | 0.00% | Add +42.1% | 108 | $4K |
| Toth Financial Advisory Corp. | 0.00% | No change | 100 | $4K |
| HM Payson & Co. | 0.00% | Reduce -33.3% | 100 | $4K |
| LGT Financial Advisors LLC | 0.01% | No change | 82 | $3K |
| Bessemer Group Inc. | 0.00% | Reduce -19.8% | 73 | $3K |
| GPS Wealth Strategies Group, LLC | 0.00% | No change | 65 | $2K |
| Rothschild Investment LLC | 0.00% | Add +1100.0% | 60 | $2K |
| Versant Capital Management, Inc | 0.00% | No change | 58 | $2K |
| Private Wealth Management Group, LLC | 0.00% | No change | 56 | $2K |
| Hemington Wealth Management | 0.00% | New | 66 | $2K |
| Whittier Trust Co. of Nevada Inc. | 0.00% | No change | 45 | $2K |
| Eagle Bay Advisors LLC | 0.00% | Add +59.3% | 43 | $2K |
| Farmers & Merchants Investments Inc. | 0.00% | No change | 35 | $1K |
| Farther Finance Advisors, LLC | 0.00% | Add +6.3% | 34 | $1K |
| JFS Wealth Advisors, LLC | 0.00% | Add +68.8% | 27 | $999 |
| MassMutual Private Wealth & Trust, FSB | 0.00% | Add +35.0% | 27 | $999 |
| Raffa Wealth Management, LLC | 0.00% | No change | 26 | $962 |
| AdvisorNet Financial, Inc | 0.00% | No change | 26 | $962 |
| IFP Advisors, Inc | 0.00% | No change | 25 | $925 |
| Sachetta, LLC | 0.00% | No change | 20 | $740 |
| AlphaQuest LLC | 0.00% | Reduce -99.6% | 20 | $740 |
| Arax Advisory Partners | 0.00% | No change | 17 | $629 |
| MV Capital Management, Inc. | 0.00% | Reduce -30.0% | 14 | $518 |
| Huntington National Bank | 0.00% | No change | 12 | $444 |
| Allspring Global Investments Holdings, LLC | 0.00% | No change | 12 | $444 |
| SJS Investment Consulting Inc. | 0.00% | Add +66.7% | 10 | $370 |
| Russell Investments Group, Ltd. | 0.00% | Reduce -99.5% | 10 | $370 |
| Mendota Financial Group, LLC | 0.00% | New | 6 | $222 |
| Parkside Financial Bank & Trust | 0.00% | Add +50.0% | 6 | $222 |
| DiNuzzo Private Wealth, Inc. | 0.00% | No change | 6 | $222 |
| Abound Wealth Management | 0.00% | Reduce -44.4% | 5 | $185 |
| Larson Financial Group LLC | 0.00% | No change | 4 | $148 |
| Earned Wealth Advisors, LLC | 0.00% | New | 4 | $148 |
"% of holder's portfolio" is MRCY's weight in each manager's 13F, not the share of Mercury Systems Inc. the manager owns.