MMK · State Street Prime Money Market ETF

$100.17 +0.03 (+0.02%) At close · Aug 14

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Quarter:

Holders: 1

Total Value: $318,890

Total Shares: 3,180

Institutional Ownership Trend

2 quarters

Holder Concentration

Across 1 13F filers · Δ vs Mar 31, 2026

Top Holder

100.0%

0.0 pts

Top 5

100.0%

0.0 pts

Top 10

100.0%

0.0 pts

HHI

10,000

Highly concentrated0

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: 0

Institutional value: -81.0%

Shares held: -81.0%

Top Buyers

vs Mar 31, 2026

No qualifying movers this quarter.

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds	Open
Mega CITADEL ADVISORS LLC	−13,597	3,180

Filter: New 0 Increased 0 Reduced 1 Sold out 0 Unchanged 0

Showing 1 of 1

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

CITADEL ADVISORS LLC

$318,890

100.00%

3,180

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	3,180	$318,890	100.0%	Defined

Key facts CIK 1107414 CUSIP 85749T285 13F (30d) 1 filings 1 filers