David M. Rothenstein is CLO & VP at CIENA CORP (CIEN). They have made 69 open-market trades across 1 company since 2008, most recently 2026-09-20.
CIK 0001444157
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 69 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| CIEN | 175,381 | $58.4M |
Shares reported on the most recent Form 4, priced at the 2026-09-22 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CIEN | SELL · 10b5-1 | 2026-09-15 | 2026-09-17 | $330.48 | $826K | -0.8% | — | — |
| CIEN | SELL · 10b5-1 | 2026-08-14 | 2026-08-18 | $438.10 | $1.1M | -9.0% | -17.1% | — |
| CIEN | SELL · 10b5-1 | 2026-07-15 | 2026-07-17 | $420.91 | $1.1M | -12.5% | +18.1% | -5.4% |
| CIEN | SELL · 10b5-1 | 2026-06-15 | 2026-06-17 | $457.07 | $1.1M | +8.7% | -17.0% | -25.9% |
| CIEN | SELL · 10b5-1 | 2026-05-15 | 2026-05-19 | $562.39 | $1.4M | +2.7% | -22.8% | -19.7% |
| CIEN | SELL · 10b5-1 | 2026-04-15 | 2026-04-17 | $467.65 | $1.2M | -7.2% | +2.4% | -24.1% |
| CIEN | SELL · 10b5-1 | 2026-03-16 | 2026-03-18 | $345.00 | $863K | -2.2% | +36.0% | +15.4% |
| CIEN | SELL · 10b5-1 | 2026-02-17 | 2026-02-19 | $300.20 | $751K | +5.1% | +28.7% | +75.0% |
| CIEN | SELL · 10b5-1 | 2026-01-09 | 2026-01-13 | $219.28 | $548K | -5.2% | +19.6% | +95.9% |
| CIEN | SELL · 10b5-1 | 2025-12-15 | 2025-12-16 | $220.84 | $552K | +12.3% | +14.5% | +71.0% |
| CIEN | SELL · 10b5-1 | 2025-11-17 | 2025-11-18 | $191.72 | $479K | +6.9% | +12.1% | +60.9% |
| CIEN | SELL · 10b5-1 | 2025-10-15 | 2025-10-17 | $170.22 | $426K | +9.0% | +10.5% | +40.4% |
| CIEN | SELL · 10b5-1 | 2025-09-15 | 2025-09-17 | $132.00 | $330K | +3.9% | +23.3% | +51.3% |
| CIEN | SELL · 10b5-1 | 2025-08-15 | 2025-08-18 | $90.60 | $227K | +7.6% | +49.9% | +110.7% |
| CIEN | SELL · 10b5-1 | 2025-07-15 | 2025-07-17 | $82.21 | $411K | +7.0% | +8.0% | +98.2% |
| CIEN | SELL · 10b5-1 | 2025-06-16 | 2025-06-18 | $74.13 | $185K | +7.6% | +14.2% | +84.7% |
| CIEN | SELL · 10b5-1 | 2025-05-15 | 2025-05-16 | $79.93 | $400K | +2.6% | -7.2% | +15.0% |
| CIEN | SELL · 10b5-1 | 2025-04-15 | 2025-04-17 | $59.47 | $149K | +13.8% | +37.2% | +42.6% |
| CIEN | SELL · 10b5-1 | 2025-03-24 | 2025-03-26 | $68.88 | $172K | -14.8% | +1.7% | +22.4% |
| CIEN | SELL · 10b5-1 | 2024-12-16 | 2024-12-18 | $89.09 | $312K | -0.8% | -0.9% | -24.8% |
| CIEN | SELL · 10b5-1 | 2024-11-15 | 2024-11-19 | $68.99 | $483K | +3.6% | +27.9% | +33.6% |
| CIEN | SELL · 10b5-1 | 2024-10-15 | 2024-10-16 | $67.43 | $472K | -4.4% | +0.3% | +24.6% |
| CIEN | SELL · 10b5-1 | 2024-09-16 | 2024-09-18 | $56.24 | $197K | +6.6% | +13.1% | +52.5% |
| CIEN | SELL · 10b5-1 | 2024-08-15 | 2024-08-16 | $52.42 | $183K | +5.9% | +4.6% | +29.6% |
| CIEN | SELL · 10b5-1 | 2024-07-15 | 2024-07-17 | $48.81 | $171K | -0.6% | +6.7% | +30.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.