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SPMB · State Street(R) SPDR(R) Portfolio Mortgage Backed Bond ETF ETF

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$21.87 +0.01 (+0.05%) At close · Sep 4

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.

Use institutional holdings through the 13F API or MCP →
Holders: 2
Total Value: $32,094,920
Total Shares: 1,438,589

Institutional Ownership Trend

19 quarters

Holder Concentration

Across 2 13F filers · Δ vs Mar 31, 2026
Top Holder
100.0%
Dec 2021 → Jun 2026 · range 48.9% – 100.0%
−0.0 pts
Top 5
100.0%
Dec 2021 → Jun 2026 · range 85.5% – 100.0%
0.0 pts
Top 10
100.0%
Dec 2021 → Jun 2026 · range 90.2% – 100.0%
0.0 pts
HHI
9,999
Dec 2021 → Jun 2026 · range 2,847 – 10,000
Highly concentrated−1

Quarterly Activity

vs Mar 31, 2026
New
1
Increased
0
Decreased
0
Sold Out
0
Unchanged
1
Holder count: +1
Institutional value: +1339980.2%
Shares held: +1344375.7%

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open
CITADEL ADVISORS LLC 1,438,482 $32,092,533

Top Sold-Out Positions

vs Mar 31, 2026
No fully closed positions this quarter.
Filter: New 1 Increased 0 Reduced 0 Sold out 0 Unchanged 1
Showing 2 of 2
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
CITADEL ADVISORS LLC SPMB $32,092,533 99.99% 1,438,482
TUCKER ASSET MANAGEMENT LLC SPMB $2,387 0.01% 107