William Blair & Company’s Celestica CLS Stock Holding History

William Blair & Company’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	$864K	Buy	3,068 +1,224	+66%	+$355K	﹤0.01%	983
2025 Q4	$545K	Buy	1,844 +125	+7%	+$37.7K	﹤0.01%	1114
2025 Q3	$423K	Buy	+1,719	New	+$347K	﹤0.01%	1176
2015 Q3	–	Sell	-206,878	Closed	-$2.41M	–	1424
2015 Q2	$2.41M	Hold	206,878	–	–	﹤0.01%	1281
2015 Q1	$2.3M	Buy	+206,878	New	+$2.39M	﹤0.01%	1273

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 & Company's CLS Position: Q1 2026 in Review

William Blair & Company increased its Celestica (CLS) stake by 66% in Q1 2026, buying an estimated $355K and bringing the position to 3,068 shares worth $864K. The position accounts for ﹤0.01% of the portfolio, ranked #983.

William Blair & Company first reported a position in CLS in Q1 2015 and has held it in 5 quarters since. The position peaked at $2.41M in Q2 2015. 774 funds tracked by Wall St. Rank hold CLS as of Q1 2026.

William Blair & Company held 3,068 shares of Celestica worth $864K as of Q1 2026.
William Blair & Company bought 1,224 Celestica shares in Q1 2026, an estimated $355K.
Celestica made up ﹤0.01% of William Blair & Company's portfolio in Q1 2026, its #983 holding.
William Blair & Company first reported a position in Celestica in Q1 2015 and has held it in 5 quarters since.
William Blair & Company's Celestica position peaked at $2.41M in Q2 2015.
774 funds tracked by Wall St. Rank held Celestica as of Q1 2026.

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