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Mercury Systems Ownership | Who Owns Mercury Systems?

OverviewForecastRevenueFinancialsChartTranscripts

Mercury Systems Ownership Summary

Mercury Systems is owned by 111.44% institutional investors, 1.64% insiders. Blackrock funding, inc. /de is the largest institutional shareholder, holding 15.78% of MRCY shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 5.46% of its assets in Mercury Systems shares.

MRCY Ownership Benchmark

TypeName% Inst% Insiders% Retail
StockMercury Systems111.44%1.64%-13.07%
SectorIndustrials Stocks 67.83%16.49%15.68%
IndustryDefense Stocks67.74%13.10%19.16%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Blackrock funding, inc. /de9.37M15.78%$1.15B
Blackrock8.81M15.27%$237.75M
Vanguard group5.63M9.48%$411.20M
Jana partners management, lp3.96M6.67%$484.29M
State street3.42M5.76%$418.05M
Invesco2.67M4.50%$326.55M
Vanguard capital management2.42M4.08%$296.36M
Fmr1.84M3.10%$225.34M
T. rowe price investment management1.60M2.69%$195.20M
Goldman sachs group1.58M2.65%$192.76M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Jana partners management, lp3.96M25.46%$484.29M
13d management60.46K10.37%$7.40M
Candelo capital management lp54.06K4.08%$6.61M
Conestoga capital advisors1.49M3.96%$181.93M
Freshford capital management93.76K3.92%$11.47M
Deepwater asset management61.17K3.40%$7.48M
American capital management486.06K2.67%$59.46M
Steel partners66.54K2.27%$1.80M
Sasco capital inc / ct/561.03K2.14%$15.14M
Aristotle capital boston244.23K2.00%$29.88M

Top Buyers

HolderShares% AssetsChange
Blackrock8.81M0.01%1.40M
Fmr1.84M0.01%938.43K
Sixth street partners management company627.58K0.01%627.58K
American capital management486.06K2.67%486.06K
Blackrock funding, inc. /de9.37M0.02%450.58K

Top Sellers

HolderShares% AssetsChange
Starboard value lp---2.29M
Westwood group---787.79K
Clearline capital lp---526.61K
Ameriprise financial499.21K0.01%-492.60K
State street3.42M0.01%-447.43K

New Positions

HolderShares% AssetsChangeValue
Sixth street partners management company627.58K0.01%627.58K$76.77M
American capital management486.06K2.67%486.06K$59.46M
Jane street group115.34K0.00%115.34K$14.11M
Df dent113.61K0.26%113.61K$13.90M
Summit partners public asset management98.12K0.21%98.12K$12.00M

Sold Out

HolderChange
Stephens consulting-1.00
Advisory services network-1.00
True wealth design-2.00
Vermillion wealth management-3.00
Capital performance advisors llp-4.00

Institutional Ownership Trends

DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Jun 30, 20264049.78%66,177,7001.54%1110.93%21713.02%1307.44%
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%

Top Mutual Funds Shareholders

HolderShares% HoldingChange
iShares Core S&P Small-Cap ETF3.32M5.46%-4.39K
Vanguard Total Stock Mkt Idx Inv1.72M2.86%-8.93K
Vanguard Morn Total Stk Mkt Idx Investor1.72M2.86%-8.93K
Vanguard MStar Total Stk Mkt Idx Invest1.72M2.83%-2.14K
Vanguard US Total Market Shares ETF1.60M2.69%1.79K
First Trust RBA Amer Indl RenaisTM ETF1.60M2.62%1.84K
Victory Small Cap Value CIT (Net 75)1.56M2.62%240.00K
Stt Strt® SPDR® S&P® Arspc & Dfnc ETF1.49M2.44%-
iShares Russell 2000 ETF1.48M2.43%12.62K
SPDR® S&P Aerospace & Defense ETF1.26M2.10%-

Recent Insider Transactions

DateNameRoleActivityValue
Sep 21, 2026KUPINSKY STUART EVP, CLO & Corp SecSell$86.52K
Sep 03, 2026Ratner Steven EVP, CHROSell$338.03K
Aug 26, 2026Ballhaus William L Chairman, President & CEOSell$970.49K
Aug 25, 2026Ballhaus William L Chairman, President & CEOSell$9.37M
Aug 26, 2026Ballhaus William L Chairman, President & CEOSell$3.40M

Insider Transactions Trends

DateBuySell
2026 Q3-31
2026 Q2-5
2026 Q1-7
2025 Q4-3
2025 Q3-13

MRCY Ownership FAQ

Who Owns Mercury Systems?

Mercury Systems shareholders are primarily institutional investors at 111.44%, followed by 1.64% insiders and -13.08% retail investors. The average institutional ownership in Mercury Systems's industry, Defense Stocks, is 67.74%, which Mercury Systems exceeds.

Who owns the most shares of Mercury Systems?

Mercury Systems’s largest shareholders are Blackrock funding, inc. /de (9.37M shares, 15.78%), Blackrock (8.81M shares, 15.27%), and Vanguard group (5.63M shares, 9.48%). Together, they hold 40.53% 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 25.46% of its assets in 3.96M Mercury Systems shares, valued at 484.29M$.

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 5.46% of its total shares outstanding invested in 3.32M Mercury Systems shares.

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