William Blair & Company’s ProShares UltraShort S&P500 SDS Stock Holding History

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

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$37.6K	Sell	500 -100	-17%	-$6.95K	﹤0.01%	1726
2025 Q4	$41.1K	Buy	600 +100	+20%	+$7.06K	﹤0.01%	1675
2025 Q3	$36.1K	Hold	500	–	–	﹤0.01%	1675
2025 Q2	$41.6K	Hold	500	–	–	﹤0.01%	1620
2025 Q1	$53.6K	Hold	500	–	–	﹤0.01%	1580
2024 Q4	$49.2K	Buy	+500	New	+$49.4K	﹤0.01%	1609
2021 Q2	–	Sell	-3	Closed	-$1K	–	1923
2021 Q1	$1K	Hold	3	–	–	﹤0.01%	1848
2020 Q4	$1K	Buy	+3	New	+$1.05K	﹤0.01%	1813
2020 Q1	–	Sell	-8	Closed	-$5K	–	1752
2019 Q4	$5K	Buy	+8	New	+$5.5K	﹤0.01%	1671
2019 Q2	–	Sell	-2	Closed	-$2K	–	1765
2019 Q1	$2K	Hold	2	–	–	﹤0.01%	1680
2018 Q4	$3K	Buy	+2	New	+$1.91K	﹤0.01%	1629

Other funds holding SDS

RAM

Revere Asset Management Dallas, Texas $195M AUM 80.44% 1-Year Est. Return

BFIC

Bedell Frazier Investment Counselling Walnut Creek, California $495M AUM 29.32% 1-Year Est. Return

IAN

Integrated Advisors Network Dallas, Texas $1.91B AUM 24.91% 1-Year Est. Return

TJHA

Thomas J. Herzfeld Advisors Miami Beach, Florida $294M AUM 2.62% 1-Year Est. Return

CFIM

Client First Investment Management West Bend, Wisconsin $237M AUM 90.26% 1-Year Est. Return

IMC Chicago Chicago, Illinois $419B AUM 72.04% 1-Year Est. Return

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

TSW

Three Seasons Wealth Salt Lake City, Utah $262M AUM 45.03% 1-Year Est. Return

AIG

Abbington Investment Group Westport, Connecticut $157M AUM 35.92% 1-Year Est. Return

Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return

William Blair & Company's SDS Position: Q1 2026 in Review

William Blair & Company reduced its ProShares UltraShort S&P500 (SDS) stake by 17% in Q1 2026, selling an estimated $6.95K and leaving 500 shares worth $37.6K. The position accounts for ﹤0.01% of the portfolio, ranked #1726.

William Blair & Company first reported a position in SDS in Q4 2018 and has held it in 11 quarters since. The position peaked at $53.6K in Q1 2025. 55 funds tracked by Wall St. Rank hold SDS as of Q1 2026.

William Blair & Company held 500 shares of ProShares UltraShort S&P500 worth $37.6K as of Q1 2026.
William Blair & Company sold 100 ProShares UltraShort S&P500 shares in Q1 2026, an estimated $6.95K.
ProShares UltraShort S&P500 made up ﹤0.01% of William Blair & Company's portfolio in Q1 2026, its #1726 holding.
William Blair & Company first reported a position in ProShares UltraShort S&P500 in Q4 2018 and has held it in 11 quarters since.
William Blair & Company's ProShares UltraShort S&P500 position peaked at $53.6K in Q1 2025.
55 funds tracked by Wall St. Rank held ProShares UltraShort S&P500 as of Q1 2026.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.