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 Q2	$28.4K	Hold	500	–	–	﹤0.01%	1826
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

Jump Financial Chicago, Illinois $12.4B AUM 62.79% 1-Year Est. Return

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

DRW Securities Chicago, Illinois $4.11B AUM 21.98% 1-Year Est. Return

AWM

Axxcess Wealth Management Carlsbad, California $6.28B AUM 24.26% 1-Year Est. Return

RCM

Ridgepath Capital Management Knoxville, Tennessee $227M AUM 13.85% 1-Year Est. Return

AIG

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

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

FTUS

Flow Traders U.S. New York $2.43B AUM 44.44% 1-Year Est. Return

Susquehanna International Group Bala Cynwyd, Pennsylvania $1.28T AUM 58.89% 1-Year Est. Return

TSS

Two Sigma Securities New York $1.16B AUM 36.23% 1-Year Est. Return

William Blair & Company's SDS Position: Q2 2026 in Review

William Blair & Company held its ProShares UltraShort S&P500 (SDS) position steady in Q2 2026 at 500 shares worth $28.4K. The position accounts for ﹤0.01% of the portfolio, ranked #1826.

William Blair & Company first reported a position in SDS in Q4 2018 and has held it in 12 quarters since. The position peaked at $53.6K in Q1 2025. 50 funds tracked by Wall St. Rank hold SDS as of Q2 2026.

William Blair & Company held 500 shares of ProShares UltraShort S&P500 worth $28.4K as of Q2 2026.
William Blair & Company left its ProShares UltraShort S&P500 share count unchanged in Q2 2026.
ProShares UltraShort S&P500 made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1826 holding.
William Blair & Company first reported a position in ProShares UltraShort S&P500 in Q4 2018 and has held it in 12 quarters since.
William Blair & Company's ProShares UltraShort S&P500 position peaked at $53.6K in Q1 2025.
50 funds tracked by Wall St. Rank held ProShares UltraShort S&P500 as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.