| Sep 20, 2026 | CIENEVP & Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 220 | $348.80 | $77K@ $348.80 | 175,381 | Form 4 |
| Sep 20, 2026 | CIENEVP & Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 436 | $348.80 | $152K@ $348.80 | 175,601 | Form 4 |
| Sep 20, 2026 | CIENEVP & Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 811 | $348.80 | $283K@ $348.80 | 176,037 | Form 4 |
| Sep 20, 2026 | CIENEVP & Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 204 | $348.80 | $71K@ $348.80 | 176,848 | Form 4 |
| Sep 20, 2026 | CIENEVP & Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 679 | $348.80 | $237K@ $348.80 | 177,052 | Form 4 |
| Sep 15, 2026 | CIENEVP & Chief Strategy Officer | Open-market saleCode S · direct | 2,500 | $330.48 | $826K@ $330.48 | 177,731 | Form 4 |
| Aug 14, 2026 | CIENSVP and Chief Strategy Officer | Open-market saleCode S · direct | 2,500 | $438.10 | $1.1M@ $438.10 | 180,231 | Form 4 |
| Jul 15, 2026 | CIENSVP and Chief Strategy Officer | Open-market saleCode S · direct | 2,500 | $420.91 | $1.1M@ $420.91 | 182,731 | Form 4 |
| Jun 20, 2026 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 220 | $428.22 | $94K@ $428.22 | 185,231 | Form 4 |
| Jun 20, 2026 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 436 | $428.22 | $187K@ $428.22 | 185,451 | Form 4 |
| Jun 20, 2026 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 811 | $428.22 | $347K@ $428.22 | 185,887 | Form 4 |
| Jun 20, 2026 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 204 | $428.22 | $87K@ $428.22 | 186,698 | Form 4 |
| Jun 20, 2026 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 679 | $428.22 | $291K@ $428.22 | 186,902 | Form 4 |
| Jun 15, 2026 | CIENSVP and Chief Strategy Officer | Open-market saleCode S · direct | 2,500 | $457.07 | $1.1M@ $457.07 | 187,581 | Form 4 |
| May 15, 2026 | CIENSVP and Chief Strategy Officer | Open-market saleCode S · direct | 2,500 | $562.39 | $1.4M@ $562.39 | 190,081 | Form 4 |
| Apr 15, 2026 | CIENSVP and Chief Strategy Officer | Open-market saleCode S · direct | 2,500 | $467.65 | $1.2M@ $467.65 | 192,581 | Form 4 |
| Mar 20, 2026 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 220 | $383.89 | $84K@ $383.89 | 195,081 | Form 4 |
| Mar 20, 2026 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 436 | $383.89 | $167K@ $383.89 | 195,301 | Form 4 |
| Mar 20, 2026 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 811 | $383.89 | $311K@ $383.89 | 195,737 | Form 4 |
| Mar 20, 2026 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 174 | $383.89 | $67K@ $383.89 | 196,548 | Form 4 |
| Mar 20, 2026 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 472 | $383.89 | $181K@ $383.89 | 196,722 | Form 4 |
| Mar 16, 2026 | CIENSVP and Chief Strategy Officer | Open-market saleCode S · direct | 2,500 | $345.00 | $863K@ $345.00 | 197,194 | Form 4 |
| Feb 17, 2026 | CIENSVP and Chief Strategy Officer | Open-market saleCode S · direct | 2,500 | $300.20 | $750K@ $300.20 | 199,694 | Form 4 |
| Jan 9, 2026 | CIENSVP and Chief Strategy Officer | Open-market saleCode S · direct | 2,500 | $219.28 | $548K@ $219.28 | 202,194 | Form 4 |
| Dec 20, 2025 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 1,557 | $230.34 | $359K@ $230.34 | 204,694 | Form 4 |
| Dec 20, 2025 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 2,091 | $230.34 | $482K@ $230.34 | 206,251 | Form 4 |
| Dec 20, 2025 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 1,819 | $230.34 | $419K@ $230.34 | 208,342 | Form 4 |
| Dec 20, 2025 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 8,682 | $230.34 | $2.0M@ $230.34 | 210,161 | Form 4 |
| Dec 20, 2025 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 439 | $230.34 | $101K@ $230.34 | 218,843 | Form 4 |
| Dec 20, 2025 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 436 | $230.34 | $100K@ $230.34 | 219,282 | Form 4 |
| Dec 20, 2025 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 811 | $230.34 | $187K@ $230.34 | 219,718 | Form 4 |
| Dec 20, 2025 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 204 | $230.34 | $47K@ $230.34 | 220,529 | Form 4 |
| Dec 20, 2025 | CIENSVP and Chief Strategy Officer | Shares withheld for tax or exercise priceCode F · direct | 679 | $230.34 | $156K@ $230.34 | 220,733 | Form 4 |
| Dec 16, 2025 | CIENSVP and Chief Strategy Officer | Grant or awardCode A · direct | 7,148 | — | — | 221,412 | Form 4 |
| Dec 16, 2025 | CIENSVP and Chief Strategy Officer | Grant or awardCode A · direct | 17,664 | — | — | 214,264 | Form 4 |
| Dec 16, 2025 | CIENSVP and Chief Strategy Officer | Grant or awardCode A · direct | 15,910 | — | — | 196,600 | Form 4 |
| Dec 15, 2025 | CIENSVP and Chief Strategy Officer | Open-market saleCode S · direct | 2,500 | $220.84 | $552K@ $220.84 | 180,690 | Form 4 |