William Blair Investment Management’s Celestica CLS Stock Holding History

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

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$10.9M	Sell	38,716 -25,569	-40%	-$7.42M	0.04%	312
2025 Q4	$19M	Sell	64,285 -53,111	-45%	-$16M	0.05%	279
2025 Q3	$28.9M	Buy	+117,396	New	+$23.7M	0.07%	222
2025 Q1	–	Sell	-30,308	Closed	-$2.8M	–	433
2024 Q4	$2.8M	Buy	+30,308	New	+$2.37M	0.01%	357
2015 Q4	–	Sell	-206,878	Closed	-$2.65M	–	449
2015 Q3	$2.65M	Buy	+206,878	New	+$2.56M	0.01%	857

Other funds holding CLS

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Franklin Resources San Mateo, California $408B AUM 30.18% 1-Year Est. Return

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

Arrowstreet Capital Boston, Massachusetts $185B AUM 39.58% 1-Year Est. Return

CIBC World Market Toronto, Ontario, Canada $61.3B AUM 39.33% 1-Year Est. Return

Connor, Clark & Lunn Investment Management (CC&L) Vancouver, British Columbia, Canada $43.4B AUM 51.29% 1-Year Est. Return

Viking Global Investors Stamford, Connecticut $35.7B AUM 21.3% 1-Year Est. Return

WRCM

Whale Rock Capital Management Boston, Massachusetts $7.74B AUM 180.85% 1-Year Est. Return

William Blair Investment Management's CLS Position: Q1 2026 in Review

William Blair Investment Management reduced its Celestica (CLS) stake by 40% in Q1 2026, selling an estimated $7.42M and leaving 38,716 shares worth $10.9M. The position accounts for 0.04% of the portfolio, ranked #312.

William Blair Investment Management first reported a position in CLS in Q3 2015 and has held it in 5 quarters since. The position peaked at $28.9M in Q3 2025. 775 funds tracked by Wall St. Rank hold CLS as of Q1 2026.

William Blair Investment Management held 38,716 shares of Celestica worth $10.9M as of Q1 2026.
William Blair Investment Management sold 25,569 Celestica shares in Q1 2026, an estimated $7.42M.
Celestica made up 0.04% of William Blair Investment Management's portfolio in Q1 2026, its #312 holding.
William Blair Investment Management first reported a position in Celestica in Q3 2015 and has held it in 5 quarters since.
William Blair Investment Management's Celestica position peaked at $28.9M in Q3 2025.
775 funds tracked by Wall St. Rank held Celestica as of Q1 2026.

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