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IBB · iShares Biotechnology ETF ETF

Alerts for IBB
$211.92 -1.89 (-0.88%) 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: 547
Total Value: $7,195,477,407
Total Shares: 37,885,320
Showing 1–100 of 564 holdings by value · page 1 of 6

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 547 13F filers · Δ vs Mar 31, 2026
Top Holder
18.2%
Sep 2023 → Jun 2026 · range 14.8% – 20.7%
+1.5 pts
Top 5
49.6%
Sep 2023 → Jun 2026 · range 39.0% – 52.2%
+3.5 pts
Top 10
63.6%
Sep 2023 → Jun 2026 · range 54.6% – 63.6%
+5.4 pts
HHI
696
Sep 2023 → Jun 2026 · range 502 – 696
Broadly held+112

Quarterly Activity

vs Mar 31, 2026
New
70
Increased
149
Decreased
181
Sold Out
445
Unchanged
147
Holder count: -375
Institutional value: -2.0%
Shares held: -12.9%

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 564
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Holder Value (USD) % of 13F Shares Open