AON vs WTW
Aon plc (AON) and Willis Towers Watson PLC (WTW) are both filed with the SEC under Insurance Agents, Brokers & Service. AON is 2.4× WTW's size by market cap ($74.2B against $31.5B); WTW trades at the higher fiscal-year P/E (20.9× against 20.5×); AON reports the higher net margin (21.5% against 16.5%); AON grew sales faster over three years (+11.2% against +3.1%); and over the past year WTW returned +6.1% against AON's -2.1%.
| AON | WTW | |
|---|---|---|
| Last close | $355.40 | $343.75 |
| Market cap | $74.2B | $31.5B |
| P/E (FY) | 20.5× | 20.9× |
| P/S | 4.3× | 3.2× |
| Operating margin | 25.3% | 23.0% |
| Net margin | 21.5% | 16.5% |
| Return on equity | 47.8% | 20.2% |
| Sales growth (3y) | +11.2% | +3.1% |
| EPS growth (3y) | +11.9% | +21.9% |
| Dividend yield | 0.8% | 1.1% |
| 1-year return | -2.1% | +6.1% |
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 — FY2025 (ended 2025-12-31) for both.
Who holds them, and who has traded them
| AON | WTW | |
|---|---|---|
| Institutional holders (13F) | 1,247 | 719 |
| Insider buyers − sellers (180d) | — | +1 |
| Congressional trades disclosed (180d) | 1 | 0 |
| Executive-branch officials on file — trades disclosed (180d) | 9 | 6 |
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. — no open-market Form 4 purchases or sales in the window.
AON vs WTW: common questions
- Is AON bigger than WTW?
- AON carries the larger market cap — $74.2B against $31.5B, both struck on 2026-08-27.
- Which trades at a higher P/E, AON or WTW?
- WTW, at a fiscal-year 20.9× against 20.5× for AON. Both are price ÷ latest full-year diluted earnings per share, not a trailing-twelve-month P/E.
- How have AON and WTW performed over the past year?
- WTW returned +6.1% and AON -2.1%, measured on the trailing calendar year to the last close.
- How many institutions hold AON and WTW?
- 1,247 13F filers report a position in AON and 719 in WTW, on the latest quarter in the panel.
- Are AON and WTW in the same industry?
- Both are filed with the SEC under Insurance Agents, Brokers & Service, which is the classification this pairing is built on.
AON overview → · WTW overview → · AON institutional ownership → · WTW institutional ownership → · Congress and AON → · Executive branch and AON → · Executive branch and WTW →
More in Insurance Agents, Brokers & Service: AON vs MRSH · MRSH vs WTW
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Source: SPZCO — https://spzco.com/vs/aon-vs-wtw