Filing Flows › Industries › Technology › Telephone & Telegraph Apparatus
Telephone & Telegraph Apparatus SIC 3661
6 companies filing with the SEC under SIC 3661. Median revenue growth +29% year on year in Q2 2026 (middle half +10% to +43%, 6 companies). The growth model expects the industry's combined revenue to grow +33% in Q3 2026. 4 customer or supplier links named in annual reports.
Money flow: where the industry's revenue goes
Drawn in the browser: an estimate of where the industry's revenue goes — what it buys from other industries, the pay that reaches households, taxes and profit — beside its filed cash flow, two tiers of suppliers and its capital spending by kind of asset.
Open the industry: growth distribution, money flow, network →
Who sells to whom
Customers and suppliers named in the companies' annual reports; the share is of the supplier's revenue.
- FN → CSCO 20% of the supplier's revenue, $924M
- FN → NVDA 16% of the supplier's revenue, $756M
- FN → NOK 11% of the supplier's revenue, $497M
- FN → AMZN 10% of the supplier's revenue, $487M
Growth model
Industry revenue, the same companies year on year; 80% ranges. Fitted on SEC filings and tested out of sample (how).
| Quarter | Growth Y/Y | Revenue | 80% range |
|---|---|---|---|
| Q3 2026 | +32.9% | $3.5B | $3.2B – $3.8B |
| Q4 2026 | +30.1% | $3.8B | $3.4B – $4.2B |
| Q1 2027 | +27.4% | $4.0B | $3.5B – $4.4B |
| Q2 2027 | +24.9% | $4.2B | $3.6B – $4.7B |
Capital spending and supply chain →
Companies
| Company | Quarterly revenue | Y/Y | Stage |
|---|---|---|---|
| CIEN Ciena | $1.7B | +37% | transition |
| FN Fabrinet | $1.5B | +45% | expansion |
| ADTN Adtran Holdings | $281M | +6% | deceleration |
| CLFD Clearfield | $43.9M | -12% | transition |
| FKWL Franklin Wireless | $8.4M | +21% | transition |
| FIEE FiEE | $4.8M | 107× | deceleration |
Growth from positive, comparable quarterly revenue as filed; industries are SEC Standard Industrial Classification codes. Data Nov 8, 2026.