Ss Spdr S&p Biotech ETF
$165.37+1.2%
-$550.7M
Net Activity
-11.06% total shares
Institutions Holding
961
Popularity Rank
#507
Avg Weight
0.41%
Total Value
$26.3B
961 institutions currently hold XBI, with 513 net buyers and 308 net sellers this quarter.
Institutional Moves (Q2 2026)
Majority Increased
Based on recent trading activity
Net Selling Institutions
308
Net Buying Institutions
513
Top 5 by Value
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Across its top 20 institutional holders, XBI's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 7/100, avg. turnover score 47/100).
XBI ranks #507 out of 37501 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
XBI is a top-conviction position for PSP Research LLC — at 48.0% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.
The largest dollar stake in XBI belongs to BNP Paribas Financial Markets, but the position matters far more to PSP Research LLC, who has 48.0% of their own portfolio riding on it — a reminder that the biggest holder by size and the holder with the biggest bet aren't always the same fund.
BNP Paribas Financial Markets has added to its XBI position for two straight quarters, increasing it by $2.9B to reach $2.9B today.
Balyasny Asset Management L.p. has trimmed its XBI position for two straight quarters, cutting it by $148.4M while still holding $131.8M.
XBI is up 1.2% today, but institutions show net selling of $550.7M this quarter — a divergence between today's price move and the underlying institutional flow.
+$3.3B
Total Buy Value
$5.4B
Total Sell Value
513
Net Buyers
308
Net Sellers
XBI
Q2 2026
Top 5 Institutional Movers
-$1.3B
+$593.5M
+$587.4M
+$493.0M
-$454.3M
XBI 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.
| Action | Member | Trade Date | Amount |
|---|---|---|---|
| Buy | Thomas H Tuberville Senate | 2024-05-08 | $1K–$15K |
| Buy | Thomas H Tuberville Senate | 2024-05-08 | $1K–$15K |
| Buy | Thomas H Tuberville Senate | 2024-05-08 | $1K–$15K |
| Buy | Thomas H Tuberville Senate | 2024-05-08 | $1K–$15K |
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
78464A870
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
4,059
Total reported value
$377.5B
Held by 4059 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
6,136
Total reported value
$2.9T
Held by 6136 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
5,803
Total reported value
$1.8T
Held by 5803 institutions — one of the most-tracked stocks on AlphaSMO
Access XBI's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/XBICLI
npx alphasmo stocks get XBI