Hudson Bay Capital Management’s Builders FirstSource BLDR Stock Holding History

Hudson Bay Capital Management’s Portfolio BLDR Stock Details BLDR Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q3	–	Sell	-16,100	Closed	-$1.88M	–	1269
2025 Q2	$1.88M	Sell	16,100 -44,200	-73%	-$5.1M	0.01%	817
2025 Q1	$7.53M	Buy	60,300 +53,900	+842%	+$7.84M	0.02%	489
2024 Q4	$915K	Hold	6,400	–	–	﹤0.01%	767
2024 Q3	$1.24M	Buy	+6,400	New	+$1.06M	0.01%	632
2023 Q4	–	Sell	-20,000	Closed	-$2.49M	–	735
2023 Q3	$2.49M	Buy	+20,000	New	+$2.76M	0.02%	437

Other funds holding BLDR

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Capital International Investors Los Angeles, California $427B AUM 29.17% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Sands Capital Management Arlington, Virginia $25.5B AUM 26.46% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

Hudson Bay Capital Management's BLDR Position: Q1 2026 in Review

Hudson Bay Capital Management increased its Builders FirstSource (BLDR) stake by 59% in Q1 2026, buying an estimated $1.6M and bringing the position to 40,363 shares worth $3.32M. The position accounts for 0.01% of the portfolio, ranked #633.

Hudson Bay Capital Management first reported a position in BLDR in Q2 2015 and has held it in 22 quarters since. The position peaked at $16.4M in Q1 2025. 719 funds tracked by Wall St. Rank hold BLDR as of Q1 2026.

Hudson Bay Capital Management held 40,363 shares of Builders FirstSource worth $3.32M as of Q1 2026.
Hudson Bay Capital Management bought 15,000 Builders FirstSource shares in Q1 2026, an estimated $1.6M.
Builders FirstSource made up 0.01% of Hudson Bay Capital Management's portfolio in Q1 2026, its #633 holding.
Hudson Bay Capital Management first reported a position in Builders FirstSource in Q2 2015 and has held it in 22 quarters since.
Hudson Bay Capital Management's Builders FirstSource position peaked at $16.4M in Q1 2025.
719 funds tracked by Wall St. Rank held Builders FirstSource as of Q1 2026.

Based on Hudson Bay Capital Management's 13F filing for Q1 2026, filed 13 May 2026.