CIEN vs FN
Ciena Corp (CIEN) and Fabrinet (FN) are both filed with the SEC under Telephone & Telegraph Apparatus. CIEN is 3.7× FN's size by market cap ($56.6B against $15.5B); CIEN trades at the higher fiscal-year P/E (470.4× against 47.2×); FN reports the higher net margin (9.7% against 2.6%); FN grew sales faster over three years (+14.8% against +9.5%); and over the past year CIEN returned +286.6% against FN's +16.7%.
| CIEN | FN | |
|---|---|---|
| Last close | $378.44 | $414.36 |
| Market cap | $56.6B | $15.5B |
| P/E (FY) | 470.4× | 47.2× |
| P/S | 11.9× | 4.5× |
| Gross margin | 42.0% | 12.1% |
| Operating margin | 4.1% | 9.5% |
| Net margin | 2.6% | 9.7% |
| Return on equity | 4.4% | 17.8% |
| Sales growth (3y) | +9.5% | +14.8% |
| EPS growth (3y) | -5.3% | +19.6% |
| 1-year return | +286.6% | +16.7% |
Screener snapshot — prices as of 2026-08-28. Each side's last close is the most recent session the snapshot holds for that company, which can be an earlier one, and its 1-year return is measured to that close. Market caps struck on 2026-08-27. Last close, market cap and the 1-year return are price figures; every other row is computed over the company's latest filed fiscal year, and the two differ: CIEN FY2025 (ended 2025-11-01); FN FY2025 (ended 2025-06-27).
Who holds them, and who has traded them
| CIEN | FN | |
|---|---|---|
| Institutional holders (13F) | 1,076 | 661 |
| Insider buyers − sellers (180d) | -5 | -1 |
| Congressional trades disclosed (180d) | 4 | 5 |
| Executive-branch officials on file — trades disclosed (180d) | 5 | 1 |
Counts only. The congressional figures count transactions dated in the trailing 180 days and disclosed in STOCK Act periodic transaction reports; amounts are filed as ranges and are never summed. The executive-branch figures count the same window of transactions, and they are scoped to one roster. The officials OGE posts for direct download. Insider buyers − sellers counts distinct people filing open-market Form 4 purchases minus distinct people filing open-market sales over the trailing 180 days, capped at ±5.
CIEN vs FN: common questions
- Is CIEN bigger than FN?
- CIEN carries the larger market cap — $56.6B against $15.5B, both struck on 2026-08-27.
- Which trades at a higher P/E, CIEN or FN?
- CIEN, at a fiscal-year 470.4× against 47.2× for FN. Both are price ÷ latest full-year diluted earnings per share, not a trailing-twelve-month P/E.
- How have CIEN and FN performed over the past year?
- CIEN returned +286.6% and FN +16.7%, measured on the trailing calendar year to the last close.
- How many institutions hold CIEN and FN?
- 1,076 13F filers report a position in CIEN and 661 in FN, on the latest quarter in the panel.
- Are CIEN and FN in the same industry?
- Both are filed with the SEC under Telephone & Telegraph Apparatus, which is the classification this pairing is built on.
CIEN overview → · FN overview → · CIEN institutional ownership → · FN institutional ownership → · Congress and CIEN → · Congress and FN → · Executive branch and CIEN → · Executive branch and FN →
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Source: SPZCO — https://spzco.com/vs/cien-vs-fn