TMO vs. ZS
TMO (Thermo Fisher Scientific Inc.) and ZS (Zscaler, Inc.) are both stocks. TMO operates in Diagnostics & Research (Healthcare), while ZS operates in Software - Infrastructure (Technology). Over the past 5 years, TMO returned 0.45%/yr vs -9.02%/yr for ZS. At a 0.31 correlation, their price movements are largely independent.
Performance
TMO vs. ZS - Performance Comparison
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Returns By Period
In the year-to-date period, TMO achieves a -18.92% return, which is significantly higher than ZS's -42.42% return.
TMO
- 1D
- -1.33%
- 1M
- 7.07%
- YTD
- -18.92%
- 6M
- -17.84%
- 1Y
- 16.84%
- 3Y*
- -3.43%
- 5Y*
- 0.45%
- 10Y*
- 12.54%
ZS
- 1D
- 2.70%
- 1M
- -19.58%
- YTD
- -42.42%
- 6M
- -45.18%
- 1Y
- -57.11%
- 3Y*
- -6.33%
- 5Y*
- -9.02%
- 10Y*
- —
TMO vs. ZS - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | |
|---|---|---|---|---|---|---|---|---|---|
TMO Thermo Fisher Scientific Inc. | -18.92% | 11.78% | -1.72% | -3.36% | -17.29% | 43.54% | 43.72% | 45.55% | 5.57% |
ZS Zscaler, Inc. | -42.42% | 24.67% | -18.57% | 98.00% | -65.18% | 60.90% | 329.48% | 18.59% | 42.58% |
Correlation
The correlation between TMO and ZS is 0.10, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.10 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.15 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.28 |
Correlation (All Time) Calculated using the full available price history since Mar 16, 2018 | 0.31 |
Over the past year, the correlation between TMO and ZS has dropped to 0.10 - well below their long-term average of 0.31, suggesting their price drivers have been diverging.
Fundamentals
TMO:
$175.06B
ZS:
$20.82B
TMO:
$18.22
ZS:
-$0.49
TMO:
3.91
ZS:
6.48
TMO:
3.37
ZS:
8.80
TMO:
$45.20B
ZS:
$3.17B
TMO:
$17.81B
ZS:
$2.43B
TMO:
$11.16B
ZS:
$69.08M
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Return for Risk
TMO vs. ZS — Risk / Return Rank
TMO
ZS
TMO vs. ZS - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Thermo Fisher Scientific Inc. (TMO) and Zscaler, Inc. (ZS). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| TMO | ZS | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +1.40 | ||
| Sortino ratioReturn per unit of downside risk | +2.21 | ||
| Omega ratioGain probability vs. loss probability | 1.10 | 0.79 | +0.31 |
| Calmar ratioReturn relative to maximum drawdown | 0.43 | -0.88 | +1.31 |
| Martin ratioReturn relative to average drawdown | 0.93 | -1.55 | +2.48 |
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Drawdowns
TMO vs. ZS - Drawdown Comparison
The maximum TMO drawdown since its inception was -71.16%, smaller than the maximum ZS drawdown of -76.41%. Use the drawdown chart below to compare losses from any high point for TMO and ZS.
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Drawdown Indicators
| TMO | ZS | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -71.16% | -76.41% | +5.25% |
Max Drawdown (1Y)Largest decline over 1 year | -31.38% | -64.89% | +33.51% |
Max Drawdown (3Y)Largest decline over 3 years | -37.28% | -64.89% | +27.61% |
Max Drawdown (5Y)Largest decline over 5 years | -40.95% | -76.41% | +35.46% |
Max Drawdown (10Y)Largest decline over 10 years | -40.95% | — | — |
Current DrawdownCurrent decline from peak | -28.80% | -64.88% | +36.08% |
Average DrawdownAverage peak-to-trough decline | -18.11% | -32.68% | +14.57% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 14.43% | 36.90% | -22.47% |
Volatility
TMO vs. ZS - Volatility Comparison
The current volatility for Thermo Fisher Scientific Inc. (TMO) is 10.57%, while Zscaler, Inc. (ZS) has a volatility of 44.34%. This indicates that TMO experiences smaller price fluctuations and is considered to be less risky than ZS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| TMO | ZS | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 10.57% | 44.34% | -33.77% |
Volatility (6M)Calculated over the trailing 6-month period | 22.27% | 57.43% | -35.16% |
Volatility (1Y)Calculated over the trailing 1-year period | 31.48% | 58.73% | -27.25% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 27.20% | 56.07% | -28.87% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 26.38% | 58.78% | -32.40% |
Dividends
TMO vs. ZS - Dividend Comparison
TMO's dividend yield for the trailing twelve months is around 0.37%, while ZS has not paid dividends to shareholders.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
TMO Thermo Fisher Scientific Inc. | 0.28% | 0.30% | 0.30% | 0.26% | 0.22% | 0.16% | 0.19% | 0.23% | 0.30% | 0.32% | 0.43% | 0.42% |
ZS Zscaler, Inc. | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
Financials
TMO vs. ZS - Financials Comparison
This section allows you to compare key financial metrics between Thermo Fisher Scientific Inc. and Zscaler, Inc.. You can select fields from income statements, balance sheets, and cash flow statements to easily visualize and compare the financial health of both companies.
Total Revenue: Total amount of money received from sales and other business activities
TMO vs. ZS - Profitability Comparison
TMO - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Thermo Fisher Scientific Inc. reported a gross profit of 4.48B and revenue of 11.01B. Therefore, the gross margin over that period was 40.7%.
ZS - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Zscaler, Inc. reported a gross profit of 657.82M and revenue of 850.48M. Therefore, the gross margin over that period was 77.4%.
TMO - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Thermo Fisher Scientific Inc. reported an operating income of 1.86B and revenue of 11.01B, resulting in an operating margin of 16.9%.
ZS - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Zscaler, Inc. reported an operating income of -29.64M and revenue of 850.48M, resulting in an operating margin of -3.5%.
TMO - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Thermo Fisher Scientific Inc. reported a net income of 1.65B and revenue of 11.01B, resulting in a net margin of 15.0%.
ZS - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Zscaler, Inc. reported a net income of -13.88M and revenue of 850.48M, resulting in a net margin of -1.6%.
Frequently Asked Questions
TMO and ZS have a correlation of 0.10, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
ZS has higher volatility (44.34%) compared to TMO (10.57%). In terms of maximum drawdown, TMO dropped -71.16% vs ZS's -76.41%.
TMO currently has the higher Sharpe Ratio (0.43 vs -0.97), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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