M & L Capital Management Ltd: CIENA CORP (CIEN): Quarterly 13F Position History
As of Q3 2026, M & L Capital Management Ltd reported 100,580 shares of CIENA CORP (CIEN), worth $35.4M and representing 7.3% of its 13F equity book. Quarter-over-quarter share count change: + 37,650 (+59.8%) . The position first appeared in Q3 2025 and has been disclosed across 5 13F-HR filings in Pactolio's tracked window.
- 100,580Shares Held (Latest Filing)
- $35.4MReported Market Value (Latest Filing)
- 7.3%Portfolio Weight (% of 13F Equity Book)
- +37,650Quarter-over-Quarter Share Change
- +$4.5MQuarter-over-Quarter Value Change
- 100,580Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 5 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q3 2026 | 100,580 | +37,650 | +59.8% | $35.4M | 7.3% | $351.8 |
| Q2 2026 | 62,930 | +7,200 | +12.9% | $30.9M | 8.3% | $490.6 |
| Q1 2026 | 55,730 | +19,480 | +53.7% | $21.6M | 5.3% | $388.2 |
| Q4 2025 | 36,250 | +31,350 | +639.8% | $8.5M | 1.8% | $233.9 |
| Q3 2025 | 4,900 | – | – | $713.8K | 0.1% | $145.7 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares, a quarter-end mark rather than the manager's cost basis. See the full methodology document for the normalization rules.
When did M & L Capital Management Ltd first disclose a CIEN position in 13F-HR filings?
M & L Capital Management Ltd first reported CIENA CORP (CIEN) on its 13F-HR filing for the period ending 2025-09-30 (Q3 2025). The position has appeared on 5 reported quarters within Pactolio's tracked window.
What was M & L Capital Management Ltd's most recent quarter-over-quarter share-count change in CIEN?
Between Q2 2026 and Q3 2026, M & L Capital Management Ltd added 37,650 shares of CIEN (+59.8%), bringing the total reported position to 100,580 shares at a market value of $35.4M.
Does the implied price-per-share represent M & L Capital Management Ltd's cost basis in CIEN?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.