William Frels - Mairs & Power Inc
Period: Q1 2026
Portfolio date: 31 Mar 2026
No. of stocks: 245
Portfolio value: $9,786,094,433
Holding/activity history for Ciena Corp. (CIEN)
| Period |
Shares |
% of Portfolio |
Activity |
% Change to Portfolio |
Reported Price |
Value |
Filing |
| 2026 Q1 |
2,800 |
0.01 |
Reduce 6.67%
|
<0.01 |
$388.23 |
$1,087,044 |
SEC |
| 2025 Q4 |
3,000 |
0.01 |
|
|
$233.87 |
$701,610 |
SEC |
| 2025 Q3 |
3,000 |
<0.01 |
Reduce 25.00%
|
<0.01 |
$145.67 |
$437,010 |
SEC |
| 2025 Q2 |
4,000 |
<0.01 |
Buy
|
<0.01 |
$81.33 |
$325,320 |
SEC |