William Blair & Company’s ProShares UltraShort Dow 30 DXD Stock Holding History

William Blair & Company’s Portfolio DXD Stock Details DXD Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-12	Closed	-$264	–	1887
2025 Q3	$264	Buy	+12	New	+$281	﹤0.01%	1841
2021 Q1	–	Sell	-5	Closed	–	–	1871
2020 Q4	$0	Hold	5	–	–	﹤0.01%	1824
2020 Q3	$0	Hold	5	–	–	﹤0.01%	1732
2020 Q2	$0	Hold	5	–	–	﹤0.01%	1688
2020 Q1	$1K	Hold	5	–	–	﹤0.01%	1633
2019 Q4	$1K	Hold	5	–	–	﹤0.01%	1712
2019 Q3	$1K	Hold	5	–	–	﹤0.01%	1677
2019 Q2	$1K	Sell	5 -25	-83%	-$3.49K	﹤0.01%	1712
2019 Q1	$4K	Hold	30	–	–	﹤0.01%	1664
2018 Q4	$5K	Buy	+30	New	+$4.79K	﹤0.01%	1604
2018 Q2	–	Sell	-30	Closed	-$5K	–	1599
2018 Q1	$5K	Buy	+30	New	+$4.99K	﹤0.01%	1481

Other funds holding DXD

Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

Quadrature Capital London, United Kingdom $8.4B AUM 63.34% 1-Year Est. Return

Susquehanna International Group Bala Cynwyd, Pennsylvania $893B AUM 36.07% 1-Year Est. Return

Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

TRCT

Tower Research Capital (TRC) New York $3.85B AUM 32.11% 1-Year Est. Return

HRT Financial New York $40.1B AUM 58.22% 1-Year Est. Return

Jane Street New York $777B AUM 61.18% 1-Year Est. Return

UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

Simplex Trading Chicago, Illinois $149B AUM 62.07% 1-Year Est. Return

Oakworth Capital Birmingham, Alabama $2.1B AUM 24.07% 1-Year Est. Return

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

William Blair & Company sold out of ProShares UltraShort Dow 30 (DXD) in Q4 2025, closing a stake of 12 shares — an estimated $264 sold.

William Blair & Company first reported a position in DXD in Q1 2018 and held it in 11 quarters. The position peaked at $5K in Q4 2018. 14 funds tracked by Wall St. Rank hold DXD as of Q4 2025.

William Blair & Company reported no remaining ProShares UltraShort Dow 30 position as of Q4 2025 after selling out during the quarter.
William Blair & Company sold 12 ProShares UltraShort Dow 30 shares in Q4 2025, an estimated $264.
William Blair & Company first reported a position in ProShares UltraShort Dow 30 in Q1 2018 and held it in 11 quarters.
William Blair & Company's ProShares UltraShort Dow 30 position peaked at $5K in Q4 2018.
14 funds tracked by Wall St. Rank held ProShares UltraShort Dow 30 as of Q4 2025.

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