# TELLABS INC

TELLABS INC is a company headquartered in Naperville, IL, United States.

## Company overview

- **Legal name:** TELLABS INC
- **Classification:** Company
- **Industry (SIC):** 3661 — Telephone & Telegraph Apparatus
- **Headquarters:** Naperville, IL, United States
- **Incorporated in:** DE
- **Fiscal year end:** December 29
- **SEC CIK:** 0000317771

## About

TELLABS INC is identified in the retained SEC EDGAR snapshot dated 2026-10-14. Its SEC Central Index Key is 0000317771, and its reported industry is Telephone & Telegraph Apparatus. In 10-K filed on 2013-02-22, it reported annual revenue of USD 1,052,600,000; net income of USD -171,700,000; total assets of USD 1,638,100,000 for the fiscal period ended 2012-12-28. The financial history preserves reporting periods, currencies, filing accessions and source provenance. Figures are reported filing data, rather than real-time estimates.

## Financials

Annual figures as originally reported. Currency is shown for each fiscal year; B means billion and M means million.

### FY2012 (period ended 2012-12-28)

- **Revenue:** $1.1B (USD 1,052,600,000)
- **Net income:** -$171.7M (USD -171,700,000)
- **Total assets:** $1.6B (USD 1,638,100,000)
- **Cash and equivalents:** $223.7M (USD 223,700,000)
- **Operating cash flow:** $45.1M (USD 45,100,000)

### FY2011 (period ended 2011-12-30)

- **Revenue:** $1.3B (USD 1,285,700,000)
- **Net income:** -$188.4M (USD -188,400,000)
- **Total assets:** $2.2B (USD 2,248,000,000)
- **Cash and equivalents:** $132.7M (USD 132,700,000)
- **Operating cash flow:** -$49.1M (USD -49,100,000)

### FY2010 (period ended 2010-12-31)

- **Revenue:** $1.6B (USD 1,642,300,000)
- **Net income:** $155.6M (USD 155,600,000)
- **Total assets:** $2.6B (USD 2,602,900,000)
- **Cash and equivalents:** $208.8M (USD 208,800,000)
- **Operating cash flow:** $288.8M (USD 288,800,000)

## Recent SEC filings

- Form 8-K — filed 2013-12-04 — period 2013-12-02 — FORM 8-K
- Form 10-Q — filed 2013-10-31 — period 2013-09-27 — FORM 10-Q
- Form 8-K — filed 2013-10-21 — period 2013-10-18 — FORM 8-K
- Form 10-Q — filed 2013-08-01 — period 2013-06-28 — FORM 10-Q
- Form 8-K — filed 2013-08-01 — period 2013-08-01 — FORM 8-K
- Form 8-K — filed 2013-07-15 — period 2013-07-12 — FORM 8-K
- Form 8-K — filed 2013-06-28 — period 2013-06-24 — FORM 8-K
- Form 8-K — filed 2013-05-22 — period 2013-05-17 — 8-K
- Form 8-K — filed 2013-05-02 — period 2013-05-01 — 8-K
- Form 10-Q — filed 2013-05-01 — period 2013-03-29 — FORM 10-Q
- Form 8-K — filed 2013-04-26 — period 2013-04-25 — FORM 8-K
- Form DEF 14A — filed 2013-03-28 — period 2013-05-01 — DEFINITIVE PROXY STATEMENT

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Updated: 2026-10-23T20:12:17Z

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