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

Alerts for BIL
$91.45 +0.03 (+0.03%) 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.

Holders: 671
Total Value: $19,074,263,742
Total Shares: 208,150,725
Showing 1–100 of 676 holdings by value · page 1 of 7

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 671 13F filers · Δ vs Mar 31, 2026
Top Holder
14.0%
Sep 2023 → Jun 2026 · range 7.7% – 14.0%
+4.4 pts
Top 5
37.8%
Sep 2023 → Jun 2026 · range 26.5% – 37.8%
+10.4 pts
Top 10
51.5%
Sep 2023 → Jun 2026 · range 39.0% – 51.5%
+12.5 pts
HHI
423
Sep 2023 → Jun 2026 · range 224 – 423
Broadly held+188

Quarterly Activity

vs Mar 31, 2026
New
61
Increased
243
Decreased
322
Sold Out
700
Unchanged
45
Holder count: -639
Institutional value: -34.7%
Shares held: -34.7%

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 676
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Holder Value (USD) % of 13F Shares Open