Ishares Biotechnology ETF
$210.82+0.8%
+$33.5M
Net Activity
-2.58% total shares
Institutions Holding
964
Popularity Rank
#504
Avg Weight
0.16%
Total Value
$8.0B
964 institutions currently hold IBB, with 360 net buyers and 395 net sellers this quarter.
Institutional Moves (Q2 2026)
Neutral
Based on recent trading activity
Net Selling Institutions
395
Net Buying Institutions
360
Top 5 by Value
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Across its top 20 institutional holders, IBB's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 5/100, avg. turnover score 35/100).
IBB ranks #504 out of 37501 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
IBB is a disclosed holding of Two Sigma (Two Sigma Investments), one of the tracked superinvestors on AlphaSMO — it makes up 0.2% of that fund's own 13F portfolio.
964 institutions disclose a position in IBB, but none treat it as a major bet — even WestEnd Advisors, LLC, its most concentrated holder, allocates just 2.8% of its own portfolio to it.
BNP Paribas Financial Markets has added to its IBB position for two straight quarters, increasing it by $418.2M to reach $421.8M today.
Capital Fund Management S.a. has trimmed its IBB position for two straight quarters, cutting it by $33.8M while still holding $16.0M.
IBB is up 0.8% today, and institutions have been net buyers of $33.5M this quarter — today's price move and the underlying institutional flow are pointing the same direction.
+$866.2M
Total Buy Value
$1.0B
Total Sell Value
360
Net Buyers
395
Net Sellers
IBB
Q2 2026
Top 5 Institutional Movers
-$278.7M
+$207.9M
+$163.3M
+$158.0M
-$90.8M
IBB does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.
13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
No Form 144 planned sale filings in the last 90 days
No Schedule 13D/13G filings for this ticker
No Form 8-K filings for this ticker
464287556
The most-added stocks by 13F institutions this quarter
Institutions Holding
6,239
Total reported value
$2.2T
3224 13F institutions increased their position this quarter
Institutions Holding
5,987
Total reported value
$3.6T
3028 13F institutions increased their position this quarter
Institutions Holding
6,149
Total reported value
$1.8T
2966 13F institutions increased their position this quarter
The most widely held stocks tracked across all 13F institutions
Institutions Holding
5,071
Total reported value
$1.1T
Held by 5071 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,921
Total reported value
$485.0B
Held by 4921 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,836
Total reported value
$1.5T
Held by 4836 institutions — one of the most-tracked stocks on AlphaSMO
Access IBB's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/IBBCLI
npx alphasmo stocks get IBB