William John Sempolinski
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William John Sempolinski’s iShares Biotechnology ETF IBB Stock Holding History

William John Sempolinski’s Portfolio IBB Stock Details IBB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q3 		$1.79M Buy
8,503
+7,135
+522% +$1.43M 0.69% 32
2026
Q2 		$260K Buy
1,368
+102
+8% +$17.5K 0.11% 95
2026
Q1 		$214K Hold
1,266
– – 0.11% 89
2025
Q4 		$214K Buy
+1,266
New +$206K 0.11% 83

Other funds holding IBB

Citigroup
Citigroup New York $308B AUM 40.94% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.96T AUM 27.49% 1-Year Est. Return
BNP Paribas Financial Markets
BNP Paribas Financial Markets Paris, France $294B AUM 47.59% 1-Year Est. Return
Raymond James Financial
Raymond James Financial St Petersburg, Florida $375B AUM 21.05% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $765B AUM 28.39% 1-Year Est. Return
LPL Financial
LPL Financial San Diego, California $468B AUM 17.69% 1-Year Est. Return
Commerce Bank
Commerce Bank Kansas City, Missouri $22.9B AUM 22.61% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.84T AUM 33.86% 1-Year Est. Return
Truist Financial
Truist Financial Charlotte, North Carolina $84.4B AUM 20.16% 1-Year Est. Return
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund Toronto, Ontario, Canada $64.4B AUM 36.06% 1-Year Est. Return

William John Sempolinski's IBB Position: Q3 2026 in Review

William John Sempolinski increased its iShares Biotechnology ETF (IBB) stake by 522% in Q3 2026, buying an estimated $1.43M and bringing the position to 8,503 shares worth $1.79M. The position accounts for 0.69% of the portfolio, ranked #32.

William John Sempolinski first reported a position in IBB in Q4 2025 and has held it in 4 quarters since. 907 funds tracked by Wall St. Rank hold IBB as of Q3 2026.

  • William John Sempolinski held 8,503 shares of iShares Biotechnology ETF worth $1.79M as of Q3 2026.
  • William John Sempolinski bought 7,135 iShares Biotechnology ETF shares in Q3 2026, an estimated $1.43M.
  • iShares Biotechnology ETF made up 0.69% of William John Sempolinski's portfolio in Q3 2026, its #32 holding.
  • William John Sempolinski first reported a position in iShares Biotechnology ETF in Q4 2025 and has held it in 4 quarters since.
  • 907 funds tracked by Wall St. Rank held iShares Biotechnology ETF as of Q3 2026.

Based on William John Sempolinski's 13F filing for Q3 2026, filed 20 Oct 2026.