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BIL · State Street SPDR Bloomberg 1-3 Month T-Bill ETF

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$91.53 +0.02 (+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.

Holders: 360
Total Value: $14,457,731,388
Total Shares: 157,406,364

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 360 13F filers · Δ vs Mar 31, 2026
Top Holder
18.5%
Sep 2023 → Jun 2026 · range 7.7% – 18.5%
+8.9 pts
Top 5
45.0%
Sep 2023 → Jun 2026 · range 26.5% – 45.0%
+17.6 pts
Top 10
60.7%
Sep 2023 → Jun 2026 · range 39.0% – 60.7%
+21.7 pts
HHI
622
Sep 2023 → Jun 2026 · range 225 – 622
Broadly held+387

Quarterly Activity

vs Mar 31, 2026
New
28
Increased
134
Decreased
168
Sold Out
972
Unchanged
30
Holder count: -944
Institutional value: -50.5%
Shares held: -50.6%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 365
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1081019 CUSIP 78468R663 13F (30d) 368 filings 363 filers Visit website