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SPDR S&P MidCap 400 ETF Trust
MDY

Overview Fund Activity

1,322 hedge funds and large institutions have $14.1B invested in SPDR S&P MidCap 400 ETF Trust in 2025 Q2 according to their latest regulatory filings, with 84 funds opening new positions, 324 increasing their positions, 509 reducing their positions, and 64 closing their positions.

Holders
1,322
Holders Change
-19
Holders Change %
-1.42%
% of All Funds
17.74%
Holding in Top 10
57
Holding in Top 10 Change
-9
Holding in Top 10 Change %
-13.64%
% of All Funds
0.77%
New
84
Increased
324
Reduced
509
Closed
64
Calls
$259M
Puts
$158M
Net Calls
+$100M
Net Calls Change
-$60.8M

Top Buyers

1
Morgan Stanley
1
Morgan Stanley
New York
$749M
2
MCM
2
Moore Capital Management
New York
$359M
3
Corient Private Wealth
3
Corient Private Wealth
Florida
$275M
4
Goldman Sachs
4
Goldman Sachs
New York
$492M
5
HF
5
HRT Financial
New York
$61.7M

Top Sellers

1
Citadel Advisors
1
Citadel Advisors
Florida
$1.25M
2
SG Americas Securities
2
SG Americas Securities
New York
$59.4M
3
Kayne Anderson Rudnick Investment Management
3
Kayne Anderson Rudnick Investment Management
California
$69.4M
4
Millennium Management
4
Millennium Management
New York
$4.84M
5
Qube Research & Technologies (QRT)
5
Qube Research & Technologies (QRT)
United Kingdom
$16.8M
Name Market Value Shares Shares
Change 		Shares
Change %
Retirement Systems of Alabama
1326
Retirement Systems of Alabama
Alabama
– – -46,240 Closed
CVSC
1327
C.V. Starr & Co
New York
– – -42,100 Closed
WAM
1328
Weiss Asset Management
Massachusetts
– – -40,210 Closed
FTA
1329
Financial & Tax Architects
Missouri
– – -18,520 Closed
LA
1330
Legacy Advisors
Pennsylvania
– – -17,082 Closed
BHCM
1331
Brevan Howard Capital Management
Jersey
– – -12,308 Closed
SCM
1332
Shapiro Capital Management
Georgia
– – -12,300 Closed
QC
1333
Quadrature Capital
United Kingdom
– – -6,911 Closed
PCP
1334
Proficio Capital Partners
Massachusetts
– – -6,640 Closed
CAM
1335
CenterStar Asset Management
Illinois
– – -4,984 Closed
DS
1336
DRW Securities
Illinois
– – -3,000 Closed
Walleye Trading
1337
Walleye Trading
New York
– – -2,688 Closed
Marshall Wace
1338
Marshall Wace
United Kingdom
– – -2,500 Closed
TSS
1339
Two Sigma Securities
New York
– – -2,468 Closed
Macquarie Group
1340
Macquarie Group
Australia
– – -2,244 Closed
CWC
1341
Carolinas Wealth Consulting
North Carolina
– – -1,739 Closed
TC
1342
TownSquare Capital
Utah
– – -1,717 Closed
QCG
1343
Quadrant Capital Group
Ohio
– – -1,680 Closed
AA
1344
Ashford Advisors
New York
– – -1,361 Closed
GAA
1345
Global Assets Advisory
Florida
– – -1,200 Closed
PP
1346
Paloma Partners
Connecticut
– – -1,189 Closed
American Century Companies
1347
American Century Companies
Missouri
– – -965 Closed
BCM
1348
Bayesian Capital Management
New York
– – -924 Closed
TF
1349
Tudor Financial
Ohio
– – -796 Closed
JWBC
1350
John W. Brooker & Co
California
– – -730 Closed
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