Telephone & Telegraph Apparatus Companies
FilingsAtlas covers 8 publicly traded US companies in the Telephone & Telegraph Apparatus industry (SEC SIC code 3661). Together they are worth about $75.04B in market value; the largest are Ciena (CIEN), Fabrinet (FN), ADTRAN (ADTN). By revenue, the biggest is Ciena with $4.77B in fiscal 2025. 3 of the 8 companies with a reported fiscal year were profitable.
| # | Company | Ticker | Market Cap | Revenue (latest FY) | Net Income | Revenue YoY | P/E |
|---|---|---|---|---|---|---|---|
| 1 | Ciena Corp | CIEN | $58.45B | $4.77B FY2025 | $123.3M | +18.8% | 471.1 |
| 2 | Fabrinet | FN | $15.51B | $4.64B FY2026 | $473.0M | +35.7% | 32.8 |
| 3 | ADTRAN Holdings, Inc. | ADTN | $563.4M | $1.08B FY2025 | -$45.7M | +17.5% | — |
| 4 | Clearfield, Inc. | CLFD | $442.4M | $150.1M FY2025 | -$8.1M | -9.9% | — |
| 5 | FiEE, Inc. | FIEE | $39.3M | $6.2M FY2025 | $1.1M | +867.9% | 36.4 |
| 6 | Franklin Wireless Corp | FKWL | $26.5M | $36.5M FY2026 | -$4.7M | -20.8% | — |
| 7 | Clearone Inc | CLRO | $10.1M | $0 FY2025 | -$26.1M | -100.0% | — |
| 8 | Sonim Technologies Inc | SONM | $4.2M | — FY2025 | -$20.7M | — | — |
Market cap and P/E use the latest closing price; revenue and net income are from each company's most recent annual report (10-K) filed with the SEC. Click a company for its full financial statements.