Twin Tree Management’s iShares Biotechnology ETF IBB Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2021
Q4
Sell
-78,100
Closed -$12.6M 1696
2021
Q3
$12.6M Sell
78,100
-219,300
-74% -$36.9M 0.03% 501
2021
Q2
$48.7M Buy
+297,400
New +$45.8M 0.13% 160
2020
Q4
Sell
-46,500
Closed -$6.3M 1374
2020
Q3
$6.3M Sell
46,500
-144,700
-76% -$19.6M 0.03% 517
2020
Q2
$26.1M Sell
191,200
-249,200
-57% -$31.8M 0.11% 221
2020
Q1
$47.4M Buy
440,400
+250,200
+132% +$28.8M 0.23% 80
2019
Q4
$22.9M Buy
+190,200
New +$21.2M 0.08% 196
2018
Q2
Sell
-25,400
Closed -$2.71M 1227
2018
Q1
$2.71M Sell
25,400
-428,900
-94% -$47.5M 0.02% 462
2017
Q4
$48.5M Buy
454,300
+77,500
+21% +$8.28M 0.36% 44
2017
Q3
$41.9M Buy
376,800
+179,700
+91% +$19.2M 0.33% 51
2017
Q2
$20.4M Buy
197,100
+43,800
+29% +$4.31M 0.16% 133
2017
Q1
$15M Sell
153,300
-248,700
-62% -$23.8M 0.14% 151
2016
Q4
$35.6M Buy
+402,000
New +$36.6M 0.35% 46

Other funds holding IBB

Twin Tree Management's IBB Position: Q1 2026 in Review

Twin Tree Management opened a new position in iShares Biotechnology ETF (IBB) in Q1 2026: 2,584 shares worth $436K. The stake represents 0.01% of the portfolio and ranks #960 among its holdings. This is a return to the name: Twin Tree Management previously reported a position in IBB as recently as Q1 2025.

Twin Tree Management first reported a position in IBB in Q4 2016 and has held it in 15 quarters since. The position peaked at $52.3M in Q2 2021. 917 funds tracked by Wall St. Rank hold IBB as of Q1 2026.

  • Twin Tree Management held 2,584 shares of iShares Biotechnology ETF worth $436K as of Q1 2026.
  • iShares Biotechnology ETF was a new Twin Tree Management position in Q1 2026.
  • iShares Biotechnology ETF made up 0.01% of Twin Tree Management's portfolio in Q1 2026, its #960 holding.
  • Twin Tree Management first reported a position in iShares Biotechnology ETF in Q4 2016 and has held it in 15 quarters since.
  • Twin Tree Management's iShares Biotechnology ETF position peaked at $52.3M in Q2 2021.
  • 917 funds tracked by Wall St. Rank held iShares Biotechnology ETF as of Q1 2026.

Based on Twin Tree Management's 13F filing for Q1 2026, filed 14 May 2026.