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IBB · iShares Biotechnology ETF

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$198.26 -0.68 (-0.34%) 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: 302
Total Value: $5,343,709,606
Total Shares: 28,097,670

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 302 13F filers · Δ vs Mar 31, 2026
Top Holder
24.5%
Sep 2023 → Jun 2026 · range 14.8% – 24.5%
+7.8 pts
Top 5
54.0%
Sep 2023 → Jun 2026 · range 39.0% – 54.0%
+7.9 pts
Top 10
70.7%
Sep 2023 → Jun 2026 · range 54.6% – 70.7%
+12.5 pts
HHI
943
Sep 2023 → Jun 2026 · range 503 – 943
Broadly held+359

Quarterly Activity

vs Mar 31, 2026
New
44
Increased
86
Decreased
95
Sold Out
660
Unchanged
77
Holder count: -616
Institutional value: -27.2%
Shares held: -35.4%

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 317
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 918509 CUSIP 464287556 13F (30d) 307 filings 304 filers