William Blair & Company
TBT icon

William Blair & Company’s ProShares Trust UltraShort Lehman 20+ Year Treasury TBT Stock Holding History

William Blair & Company’s Portfolio TBT Stock Details TBT Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-150
Closed -$5.07K – 1949
2025
Q3 		$5.07K Hold
150
– – ﹤0.01% 1790
2025
Q2 		$5.26K Hold
150
– – ﹤0.01% 1763
2025
Q1 		$5.05K Hold
150
– – ﹤0.01% 1747
2024
Q4 		$5.49K Hold
150
– – ﹤0.01% 1763
2024
Q3 		$4.47K Hold
150
– – ﹤0.01% 1788
2024
Q2 		$5.17K Hold
150
– – ﹤0.01% 1776
2024
Q1 		$4.94K Sell
150
-500
-77% -$16.6K ﹤0.01% 1747
2023
Q4 		$19.6K Sell
650
-50
-7% -$1.88K ﹤0.01% 1666
2023
Q3 		$27.5K Hold
700
– – ﹤0.01% 1652
2023
Q2 		$20.6K Sell
700
-1
-0.1% -$29 ﹤0.01% 1691
2023
Q1 		$19.6K Sell
701
-1,291
-65% -$37.8K ﹤0.01% 1685
2022
Q4 		$64.7K Hold
1,992
– – ﹤0.01% 1544
2022
Q3 		$63K Sell
1,992
-1,112
-36% -$29.9K ﹤0.01% 1568
2022
Q2 		$81K Sell
3,104
-150
-5% -$3.81K ﹤0.01% 1570
2022
Q1 		$67K Sell
3,254
-257,500
-99% -$4.95M ﹤0.01% 1674
2021
Q4 		$4.4M Buy
260,754
+1,000
+0.4% +$17.3K 0.01% 502
2021
Q3 		$4.77M Buy
259,754
+254,000
+4,414% +$4.45M 0.02% 468
2021
Q2 		$108K Sell
5,754
-2,000
-26% -$40.7K ﹤0.01% 1605
2021
Q1 		$169K Buy
7,754
+1,600
+26% +$31K ﹤0.01% 1516
2020
Q4 		$101K Sell
6,154
-14,358
-70% -$235K ﹤0.01% 1550
2020
Q3 		$322K Hold
20,512
– – ﹤0.01% 1115
2020
Q2 		$326K Hold
20,512
– – ﹤0.01% 1060
2020
Q1 		$330K Buy
20,512
+16,272
+384% +$352K ﹤0.01% 984
2019
Q4 		$113K Sell
4,240
-4,239
-50% -$108K ﹤0.01% 1392
2019
Q3 		$207K Sell
8,479
-66
-0.8% -$1.74K ﹤0.01% 1254
2019
Q2 		$247K Hold
8,545
– – ﹤0.01% 1227
2019
Q1 		$276K Sell
8,545
-224
-3% -$7.84K ﹤0.01% 1175
2018
Q4 		$308K Sell
8,769
-2,799
-24% -$109K ﹤0.01% 1076
2018
Q3 		$443K Sell
11,568
-100
-0.9% -$3.67K ﹤0.01% 996
2018
Q2 		$419K Buy
11,668
+50
+0.4% +$1.87K ﹤0.01% 1002
2018
Q1 		$421K Buy
11,618
+900
+8% +$33.4K ﹤0.01% 972
2017
Q4 		$362K Sell
10,718
-300
-3% -$10.5K ﹤0.01% 1068
2017
Q3 		$392K Buy
11,018
+1,850
+20% +$65.3K ﹤0.01% 1015
2017
Q2 		$329K Sell
9,168
-588
-6% -$21.8K ﹤0.01% 1147
2017
Q1 		$378K Buy
9,756
+16
+0.2% +$639 ﹤0.01% 989
2016
Q4 		$398K Buy
+9,740
New +$368K ﹤0.01% 911
2013
Q4 		– Sell
-4,050
Closed -$304K – 2034
2013
Q3 		$304K Buy
4,050
+288
+8% +$22.2K ﹤0.01% 1719
2013
Q2 		$272K Buy
+3,762
New +$245K ﹤0.01% 1711

Other funds holding TBT

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CM
CastleKnight Management New York $6B AUM 121.87% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
QC
Quadrature Capital London, United Kingdom $11.7B AUM 87.29% 1-Year Est. Return
HF
HRT Financial New York $40.1B AUM 58.22% 1-Year Est. Return
EF
Empowered Funds Havertown, Pennsylvania $15.7B AUM 34.02% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
CFA
Camarda Financial Advisors Fleming Island, Florida $190M AUM 48.71% 1-Year Est. Return
Jane Street
Jane Street New York $777B AUM 61.18% 1-Year Est. Return
Simplex Trading
Simplex Trading Chicago, Illinois $149B AUM 62.07% 1-Year Est. Return

William Blair & Company's TBT Position: Q4 2025 in Review

William Blair & Company sold out of ProShares Trust UltraShort Lehman 20+ Year Treasury (TBT) in Q4 2025, closing a stake of 150 shares — an estimated $5.07K sold.

William Blair & Company first reported a position in TBT in Q2 2013 and held it in 38 quarters. The position peaked at $4.77M in Q3 2021. 52 funds tracked by Wall St. Rank hold TBT as of Q4 2025.

  • William Blair & Company reported no remaining ProShares Trust UltraShort Lehman 20+ Year Treasury position as of Q4 2025 after selling out during the quarter.
  • William Blair & Company sold 150 ProShares Trust UltraShort Lehman 20+ Year Treasury shares in Q4 2025, an estimated $5.07K.
  • William Blair & Company first reported a position in ProShares Trust UltraShort Lehman 20+ Year Treasury in Q2 2013 and held it in 38 quarters.
  • William Blair & Company's ProShares Trust UltraShort Lehman 20+ Year Treasury position peaked at $4.77M in Q3 2021.
  • 52 funds tracked by Wall St. Rank held ProShares Trust UltraShort Lehman 20+ Year Treasury as of Q4 2025.

Based on William Blair & Company's 13F filing for Q4 2025, filed 17 Feb 2026.