Insider Trading
Current insider transactions (SEC Form 4) — buys and sells by officers, directors, and major shareholders.
| Ticker | Insider | Title | Date | Transaction | Price ($) | Shares | Value ($) | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|
| CIEN | DiPerna Dino | EVP & Chief R&D Officer | 09/16/2026 | Verkauf | 350.00 | 249 | 87,150 | Form 4 |
| CIEN | Gage Brodie | EVP & Chief Product & | 09/15/2026 | Verkauf | 324.86 | 1,200 | 389,832 | Form 4 |
| CIEN | DiPerna Dino | EVP & Chief R&D Officer | 09/15/2026 | Verkauf | 324.86 | 249 | 80,890 | Form 4 |
| CIEN | Rothenstein David M | EVP & Chief Strategy Officer | 09/15/2026 | Verkauf | 330.48 | 2,500 | 826,208 | Form 4 |
| CIEN | Smith Gary B | President & CEO | 09/15/2026 | Verkauf | 330.18 | 2,952 | 974,688 | Form 4 |
| CINT | Guicardi Neto Bruno | Pres. of N. Am. and Europe Ops | 09/11/2026 | Kauf | 3.21 | 5,389 | 17,299 | Form 4 |
| CINT | Guicardi Neto Bruno | Pres. of N. Am. and Europe Ops | 09/10/2026 | Kauf | 3.10 | 100 | 310 | Form 4 |
| CI | Neville Everett | See Remarks | 09/03/2026 | Verkauf | 284.05 | 617 | 175,259 | Form 4 |
| CI | Evanko Brian C | See Remarks | 09/01/2026 | Zuteilung | — | 3,113 | — | Form 4 |
| CIEN | Smith Gary B | President, CEO | 09/01/2026 | Verkauf | 362.90 | 2,952 | 1,071,278 | Form 4 |
| CIA | Harwood Michael Philip | Director | 08/31/2026 | Kauf | 3.80 | 10,000 | 38,000 | Form 4 |
| CIA | Harwood Michael Philip | Director | 08/28/2026 | L | 3.88 | 256 | 993 | Form 4 |
| CINF | Debbink Dirk J | Director | 08/25/2026 | Kauf | 171.64 | 1,000 | 171,640 | Form 4 |
| CI | Jones Nicole S | See Remarks | 08/18/2026 | Verkauf | 279.61 | 2,677 | 748,516 | Form 4 |
| CIEN | Gage Brodie | SVP Global Products & Supply | 08/17/2026 | Verkauf | 439.24 | 1,200 | 527,088 | Form 4 |
| CIEN | Smith Gary B | President, CEO | 08/17/2026 | Verkauf | 447.78 | 2,952 | 1,321,840 | Form 4 |
| CIA | Guerrero Paula L | Chief Information Officer | 08/15/2026 | Steuer-Abgabe | 3.97 | 796 | 3,160 | Form 4 |
| CIA | Guerrero Paula L | Chief Information Officer | 08/15/2026 | Optionsausübung | — | 2,709 | — | Form 4 |
| CIA | Lewis Bryon Matthew | Chief Operations Officer | 08/15/2026 | Steuer-Abgabe | 3.97 | 640 | 2,541 | Form 4 |
| CIA | Lewis Bryon Matthew | Chief Operations Officer | 08/15/2026 | Optionsausübung | — | 2,626 | — | Form 4 |
| CIEN | Graff Marc D. | SVP & Chief Financial Officer | 08/14/2026 | Verkauf | 430.72 | 4,995 | 2,151,435 | Form 4 |
| CIEN | Rothenstein David M | SVP and Chief Strategy Officer | 08/14/2026 | Verkauf | 438.10 | 2,500 | 1,095,250 | Form 4 |
| CIA | Hoxworth Seth Alan | Chief Actuary | 08/11/2026 | Kauf | 3.83 | 5,376 | 20,590 | Form 4 |
| CIX | Manix Ann | Director | 08/11/2026 | Verkauf | 29.74 | 2 | 59 | Form 4 |
| CIX | Manix Ann | Director | 08/11/2026 | Verkauf | 29.73 | 795 | 23,635 | Form 4 |
| CIX | Manix Ann | Director | 08/11/2026 | Verkauf | 29.56 | 33 | 975 | Form 4 |
| CIX | Manix Ann | Director | 08/11/2026 | Verkauf | 29.53 | 100 | 2,953 | Form 4 |
| CIX | Manix Ann | Director | 08/11/2026 | Verkauf | 29.44 | 200 | 5,888 | Form 4 |
| CIX | Manix Ann | Director | 08/11/2026 | Verkauf | 29.42 | 330 | 9,708 | Form 4 |
| CIX | Manix Ann | Director | 08/11/2026 | Verkauf | 29.41 | 20 | 588 | Form 4 |
| CIA | Stenberg Jon | President & CEO | 08/11/2026 | Kauf | 3.65 | 12,000 | 43,795 | Form 4 |
| CIA | Stenberg Jon | President & CEO | 08/10/2026 | Kauf | 3.99 | 50,000 | 199,630 | Form 4 |
| CIVB | Doucette Veronica G | SVP/Human Resources Officer | 08/07/2026 | Abgabe | 28.47 | 528 | 15,032 | Form 4 |
| CI | Jones Nicole S | See Remarks | 08/05/2026 | Optionsausübung | 192.02 | 1,301 | 249,818 | Form 4 |
| CI | Jones Nicole S | See Remarks | 08/04/2026 | Verkauf | 276.27 | 19,436 | 5,369,584 | Form 4 |
| CI | Jones Nicole S | See Remarks | 08/04/2026 | Optionsausübung | 192.02 | 14,045 | 2,696,921 | Form 4 |
| CINF | Schiff Charles Odell | Director | 08/03/2026 | Verkauf | 175.40 | 7,600 | 1,333,067 | Form 4 |
| CIEN | Smith Gary B | President, CEO | 08/03/2026 | Verkauf | 379.81 | 2,952 | 1,121,212 | Form 4 |
| CIEN | Graff Marc D. | SVP & Chief Financial Officer | 08/01/2026 | Steuer-Abgabe | 377.05 | 14,441 | 5,444,979 | Form 4 |
| CIA | Guerrero Paula L | Chief Information Officer | 07/31/2026 | L | 4.75 | 209 | 993 | Form 4 |
| CIA | Hoxworth Seth Alan | Chief Actuary | 07/31/2026 | L | 4.75 | 105 | 499 | Form 4 |
| CIA | Harwood Michael Philip | Director | 07/29/2026 | L | 4.75 | 209 | 993 | Form 4 |
| CIVB | Macioce Mark J. | Director | 07/29/2026 | Abgabe | 29.49 | 58 | 1,710 | Form 4 |
| CIEN | Gage Brodie | SVP Global Products & Supply | 07/15/2026 | Verkauf | 449.15 | 1,200 | 538,980 | Form 4 |
| CIEN | DiPerna Dino | SVP Global R&D | 07/15/2026 | Verkauf | 449.15 | 391 | 175,618 | Form 4 |
| CIEN | Rothenstein David M | SVP and Chief Strategy Officer | 07/15/2026 | Verkauf | 420.91 | 2,500 | 1,052,284 | Form 4 |
| CIEN | Smith Gary B | President, CEO | 07/15/2026 | Verkauf | 421.10 | 2,952 | 1,243,098 | Form 4 |
| CIA | Lewis Bryon Matthew | Chief Operations Officer | 07/14/2026 | J | — | 10,697 | — | Form 4 |
| CIA | Harwood Michael Philip | Director | 07/02/2026 | L | 5.94 | 168 | 998 | Form 4 |
| CIA | Guerrero Paula L | Chief Information Officer | 07/02/2026 | L | 5.94 | 168 | 998 | Form 4 |
| CIA | Hoxworth Seth Alan | Chief Actuary | 07/02/2026 | L | 5.94 | 84 | 499 | Form 4 |
| CIA | Guerrero Paula L | Chief Information Officer | 05/29/2026 | L | 5.23 | 190 | 994 | Form 4 |
| CIA | Hoxworth Seth Alan | Chief Actuary | 05/29/2026 | L | 5.23 | 95 | 497 | Form 4 |
| CIA | Guerrero Paula L | Chief Information Officer | 05/05/2026 | L | 5.48 | 181 | 992 | Form 4 |
| CIA | Hoxworth Seth Alan | Chief Actuary | 05/05/2026 | L | 5.48 | 91 | 499 | Form 4 |
| CIA | Guerrero Paula L | Chief Information Officer | 04/07/2026 | L | 5.42 | 184 | 997 | Form 4 |
| CIA | Hoxworth Seth Alan | Chief Actuary | 04/07/2026 | L | 5.42 | 92 | 499 | Form 4 |
A compact market overview — not investment advice. Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q).