Mercury Systems Ownership | Who Owns Mercury Systems?


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Mercury Systems Ownership Summary


Mercury Systems is owned by 107.32% institutional investors, 1.69% insiders. Blackrock is the largest institutional shareholder, holding 15.27% of MRCY shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 5.36% of its assets in Mercury Systems shares.

MRCY Ownership Benchmark


TypeName% Inst% Insiders% Retail
StockMercury Systems107.32%1.69%-9.01%
SectorIndustrials Stocks 49.67%15.62%34.71%
IndustryDefense Stocks54.23%11.75%34.02%

Institutional Shareholders


Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Blackrock8.81M15.27%$237.75M
Blackrock funding, inc. /de8.92M15.01%$650.38M
Vanguard group5.63M9.48%$411.20M
Jana partners management, lp4.11M6.91%$299.47M
State street3.87M6.51%$281.85M
Invesco2.44M4.11%$178.02M
Conestoga capital advisors1.92M3.23%$139.88M
T. rowe price investment management1.58M2.66%$115.19M
Geode capital management1.53M2.57%$111.26M
Dimensional fund advisors lp1.23M2.07%$89.52M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Jana partners management, lp4.11M18.65%$299.47M
13d management60.46K6.83%$4.41M
Freshford capital management154.06K5.61%$11.23M
Archon capital management95.81K3.94%$6.99M
Candelo capital management lp60.46K3.64%$4.41M
Conestoga capital advisors1.92M2.79%$139.88M
Deepwater asset management56.62K2.62%$4.13M
Steel partners66.54K2.27%$1.80M
Sasco capital inc / ct/561.03K2.14%$15.14M
Mesirow institutional investment management500.83K1.62%$21.03M

Top Buyers

HolderShares% AssetsChange
Blackrock8.81M0.01%1.40M
Wellington management group llp755.52K0.01%755.52K
Invesco2.44M0.03%530.84K
State street3.87M0.01%442.12K
Artisan partners limited partnership354.26K0.04%354.26K

Top Sellers

HolderShares% AssetsChange
Starboard value lp---2.29M
Jana partners management, lp4.11M18.65%-852.06K
Westwood group---787.79K
William blair investment management327.29K0.08%-656.99K
Segall bryant & hamill---636.53K

New Positions

HolderShares% AssetsChangeValue
Wellington management group llp755.52K0.01%755.52K$55.09M
Artisan partners limited partnership354.26K0.04%354.26K$25.83M
Vanguard fiduciary trust349.23K0.01%349.23K$25.46M
Vanguard asset management43.11K0.00%43.11K$3.14M
Freemont management31.70K0.35%31.70K$2.31M

Sold Out

HolderChange
Stephens consulting-1.00
Capital performance advisors llp-4.00
Td capital management-4.00
Gradient investments-5.00
Flagship harbor advisors-5.00

Institutional Ownership Trends


DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Mar 31, 20263560.28%63,762,584-1.29%1070.91%1850.54%1205.26%
Dec 31, 2025116-64.95%12,737,056-80.36%210.18%47-73.14%38-64.81%
Sep 30, 2025135-53.77%14,134,983-78.27%230.20%73-56.80%39-49.35%
Jun 30, 202528812.06%64,959,6922.93%1100.96%16530.95%77-13.48%
Mar 31, 20252542.01%63,101,197-0.66%1070.91%1247.83%892.30%

Top Mutual Funds Shareholders


HolderShares% HoldingChange
iShares Core S&P Small-Cap ETF3.22M5.36%693.00
Stt Strt® SPDR® S&P® Arspc & Dfnc ETF1.73M2.88%-11.40K
Vanguard Total Stock Mkt Idx Inv1.72M2.86%10.70K
Vanguard US Total Market Shares ETF1.60M2.69%1.79K
Victory Small Cap Value CIT (Net 75)1.56M2.62%240.00K
iShares Russell 2000 ETF1.28M2.13%10.76K
SPDR® S&P Aerospace & Defense ETF1.26M2.10%-
Victory Sycamore Small Company Opp R1.25M2.09%-52.00K
Vanguard Small Cap Index1.25M2.08%18.90K
William Blair Sml-Mid Cap Grwth CIT Cl A1.17M1.96%1.17M

Recent Insider Transactions


DateNameRoleActivityValue
May 12, 2026Carvalho Orlando D-Sell$625.53K
May 11, 2026Ratner Steven EVP, CHROSell$184.92K
Apr 16, 2026Farnsworth David E. EVP, CFOSell$307.66K
Mar 03, 2026JANA Partners Management, LP See RemarksSell$15.20M
Mar 02, 2026JANA Partners Management, LP See RemarksSell$17.17M

Insider Transactions Trends


DateBuySell
2026 Q2-3
2026 Q1-7
2025 Q4-3
2025 Q3-13
2025 Q2-7

MRCY Ownership FAQ


Who Owns Mercury Systems?

Mercury Systems shareholders are primarily institutional investors at 107.32%, followed by 1.69% insiders and -9.01% retail investors. The average institutional ownership in Mercury Systems's industry, Defense Stocks, is 54.23%, which Mercury Systems exceeds.

Who owns the most shares of Mercury Systems?

Mercury Systems’s largest shareholders are Blackrock (8.81M shares, 15.27%), Blackrock funding, inc. /de (8.92M shares, 15.01%), and Vanguard group (5.63M shares, 9.48%). Together, they hold 39.76% of Mercury Systems’s total shares outstanding.

Does Blackrock own Mercury Systems?

Yes, BlackRock owns 15.27% of Mercury Systems, totaling 8.81M shares as of Jun 2024. This represents 0.01% of BlackRock's total assets, with a market value of 237.75M$. In the last quarter, BlackRock increased its holdings by 1.4M shares, a 18.95% change.

Who is Mercury Systems’s biggest shareholder by percentage of total assets invested?

Jana partners management, lp is Mercury Systems’s biggest shareholder by percentage of total assets invested, with 18.65% of its assets in 4.11M Mercury Systems shares, valued at 299.47M$.

Who is the top mutual fund holder of Mercury Systems shares?

iShares Core S&P Small-Cap ETF is the top mutual fund holder of Mercury Systems shares, with 5.36% of its total shares outstanding invested in 3.22M Mercury Systems shares.

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