Back to William Blair Investment Management, LLC William Blair Investment Management, LLC

CIENCIEN

Showing 7 of 10 quarters

Position history for William Blair Investment Management, LLCWilliam Blair Investment Management, LLC's holdings in Ciena Corporation

No. William Blair Investment Management exited its CIEN (Ciena) position in Q3 2026. Its Q2 2026 13F listed 133,801 shares worth $65.6M. William Blair Investment Management already held CIEN in its Q4 2018 13F, the earliest on record, and held it in 8 quarterly 13F filings.

Final Value

$0

Final Shares

0

Total Value Change

-$121.2M

Total Shares Change

-2M

Quarter-by-Quarter History
QuarterActionSharesChangeValueWeightPriceConviction
2026-Q3
Latest
Exited
0
-100.0%
$00.0%$351.82
0
2026-Q2
Decreased
133,801
-66.4%
$65.6M0.2%$490.56
0
2026-Q1
Decreased
398,579
-63.7%
$154.7M0.5%$388.23
0
2025-Q4
Decreased
1.1M
-55.0%
$256.9M0.7%$233.87
0
2025-Q3
Decreased
2.4M
-9.9%
$355.6M0.9%$145.67
0
2025-Q2
Increased
2.7M
+35.0%
$220.3M0.6%$81.33
56
2025-Q1
New
2M
—
$121.2M0.3%$60.43
50

Analytics tracking helps us improve the product. Essential functions stay on either way. How analytics data is used