Bruce L. Claflin is Director at CIENA CORP (CIEN). They have made 15 open-market trades across 3 companies since 2011, most recently 2026-09-24.
CIK 0001403694
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.
2 open-market purchases totalling $381K since 2018, against 13 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| AMD | 638,902 | $337.8M |
| CIEN | 8,279 | $2.8M |
| IDXX | 161 | $90K |
| Total | $340.7M |
Shares reported on the most recent Form 4, priced at the 2026-09-28 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CIEN | SELL | 2026-09-24 | 2026-09-28 | $355.91 | $1.0M | +21.6% | — | — |
| CIEN | SELL | 2025-09-24 | 2025-09-26 | $140.12 | $2.4M | +9.5% | +25.2% | +65.7% |
| CIEN | SELL | 2025-01-06 | 2025-01-08 | $84.96 | $2.9M | +17.7% | +11.3% | -33.0% |
| IDXX | SELL | 2024-05-17 | 2024-05-20 | $540.80 | $216K | -5.3% | -5.5% | -5.3% |
| IDXX | SELL | 2021-02-16 | 2021-02-18 | $536.91 | $7.9M | -5.7% | -12.4% | -5.9% |
| IDXX | SELL | 2020-08-14 | 2020-08-18 | $383.95 | $5.2M | -1.4% | -9.0% | +17.0% |
| CIEN | SELL | 2020-07-08 | 2020-07-09 | $56.22 | $1.0M | -2.6% | +8.1% | -25.2% |
| CIEN | SELL | 2019-12-12 | 2019-12-13 | $40.00 | $210K | +2.3% | +1.5% | -16.8% |
| IDXX | BUY | 2018-08-03 | 2018-08-07 | $242.12 | $201K | -1.1% | -0.8% | -18.2% |
| IDXX | BUY | 2018-02-07 | 2018-02-09 | $179.58 | $180K | +5.4% | +17.2% | +19.9% |
| AMD | SELL | 2017-04-10 | 2017-04-12 | $13.33 | $267K | +7.9% | -10.0% | +11.1% |
| AMD | SELL | 2017-03-10 | 2017-03-14 | $13.58 | $272K | -2.5% | -12.4% | -14.0% |
| AMD | SELL | 2017-02-10 | 2017-02-14 | $13.51 | $270K | +15.3% | +3.4% | -13.5% |
| AMD | SELL | 2017-01-10 | 2017-01-12 | $11.51 | $230K | -4.1% | +25.4% | +18.3% |
| AMD | SELL | 2016-12-12 | 2016-12-14 | $10.76 | $215K | +12.7% | -1.1% | +31.8% |
| CIEN | SELL · 10b5-1 | 2016-02-22 | 2016-02-24 | $20.00 | $16K | -18.2% | -11.8% | -18.9% |
| CIEN | SELL · 10b5-1 | 2015-12-21 | 2015-12-22 | $20.00 | $8K | -9.2% | -13.6% | -9.8% |
| CIEN | SELL · 10b5-1 | 2015-11-12 | 2015-11-16 | $23.54 | $9K | -9.2% | +0.2% | -4.5% |
| CIEN | SELL · 10b5-1 | 2015-10-12 | 2015-10-13 | $22.76 | $9K | -9.2% | +0.2% | -10.1% |
| CIEN | SELL · 10b5-1 | 2015-09-14 | 2015-09-16 | $22.17 | $9K | -9.2% | +0.2% | +0.2% |
| CIEN | SELL · 10b5-1 | 2015-08-12 | 2015-08-14 | $22.86 | $9K | -9.2% | +0.2% | +0.2% |
| CIEN | SELL · 10b5-1 | 2015-07-13 | 2015-07-13 | $23.92 | $10K | -9.2% | +0.2% | +0.2% |
| CIEN | SELL · 10b5-1 | 2015-06-12 | 2015-06-15 | $25.33 | $10K | -9.2% | +0.2% | +0.2% |
| CIEN | SELL · 10b5-1 | 2015-05-12 | 2015-05-14 | $21.94 | $9K | -9.2% | +0.2% | +0.2% |
| CIEN | SELL · 10b5-1 | 2015-04-13 | 2015-04-14 | $20.00 | $8K | -9.2% | +0.2% | +0.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.