Question 1

How many shares of CIEN does Select Equity Group, L.P. own?

Accepted Answer

As of 2026-Q1, Select Equity Group, L.P. holds 2,608 shares of CIEN (CIENA CORP).

Question 2

What is Select Equity Group, L.P.'s CIEN position worth?

Accepted Answer

As of 2026-Q1, Select Equity Group, L.P.'s CIEN position is worth $1M.

Question 3

Is Select Equity Group, L.P. buying or selling CIEN?

Accepted Answer

In 2026-Q1, Select Equity Group, L.P. decreased their CIEN position (-82.7% change in shares).

Question 4

When did Select Equity Group, L.P. first buy CIEN?

Accepted Answer

Based on available 13F filings, Select Equity Group, L.P. first reported a position in CIEN in 2026-Q1. They have held the position across 5 quarters.