William Blair Investment Management’s BorgWarner BWA Stock Holding History

William Blair Investment Management’s Portfolio BWA Stock Details BWA Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$251M	Buy	3,784,707 +900,645	+31%	+$57M	0.76%	19
2026 Q1	$156M	Buy	+2,884,062	New	+$152M	0.52%	51
2024 Q2	–	Sell	-12,321	Closed	-$428K	–	416
2024 Q1	$428K	Buy	12,321 +470	+4%	+$15.4K	﹤0.01%	376
2023 Q4	$425K	Buy	+11,851	New	+$423K	﹤0.01%	369
2017 Q1	–	Sell	-1,737,604	Closed	-$60.3M	–	438
2016 Q4	$60.3M	Sell	1,737,604 -732,572	-30%	-$23.6M	0.24%	128
2016 Q3	$76.5M	Sell	2,470,176 -35,545	-1%	-$1.05M	0.29%	114
2016 Q2	$65.1M	Sell	2,505,721 -1,967,898	-44%	-$59.5M	0.26%	121
2016 Q1	$151M	Sell	4,473,619 -2,050,354	-31%	-$60.8M	0.6%	59
2015 Q4	$248M	Buy	6,523,973 +465,761	+8%	+$17.5M	1.01%	24
2015 Q3	$222M	Buy	+6,058,212	New	+$252M	0.45%	41

Other funds holding BWA

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

LSV Asset Management Chicago, Illinois $55.1B AUM 45.38% 1-Year Est. Return

AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return

Victory Capital Management San Antonio, Texas $178B AUM 37.23% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return

William Blair Investment Management's BWA Position: Q2 2026 in Review

William Blair Investment Management increased its BorgWarner (BWA) stake by 31% in Q2 2026, buying an estimated $57M and bringing the position to 3,784,707 shares worth $251M. The position accounts for 0.76% of the portfolio, ranked #19.

William Blair Investment Management first reported a position in BWA in Q3 2015 and has held it in 10 quarters since. 811 funds tracked by Wall St. Rank hold BWA as of Q2 2026.

William Blair Investment Management held 3,784,707 shares of BorgWarner worth $251M as of Q2 2026.
William Blair Investment Management bought 900,645 BorgWarner shares in Q2 2026, an estimated $57M.
BorgWarner made up 0.76% of William Blair Investment Management's portfolio in Q2 2026, its #19 holding.
William Blair Investment Management first reported a position in BorgWarner in Q3 2015 and has held it in 10 quarters since.
811 funds tracked by Wall St. Rank held BorgWarner as of Q2 2026.

Based on William Blair Investment Management's 13F filing for Q2 2026, filed 12 Aug 2026.