TMO vs VST: Which Is the Better Buy?
Side-by-side comparison of Thermo Fisher Scientific Inc. and Vistra Corp. — fair value, conviction, valuation metrics, and QuantHub research signals.
Updated 2026-09-19.
Thermo Fisher Scientific Inc. · Healthcare
$658.32
+31.1% upside to fair value
Med Conviction
Grade B
High Quality
VS
Vistra Corp. · Utilities
$140.67
-23.0% upside to fair value
Med Conviction
Grade C
QuantHub Verdict
TMO has more upside to fair value
(+31.1%).
These are model outputs — not personalized investment advice.
See all research →
Valuation & Fundamentals
| Metric |
TMO |
VST |
| Current Price |
$658.32 |
$140.67 |
| Fair Value Estimate |
$863.34 |
$108.27 |
| Upside to Fair Value |
+31.1%
|
-23.0%
|
| Market Cap |
$244.7B |
$47.4B |
| Forward P/E |
—
|
—
|
| EV / EBITDA |
25.9x
|
10.3x
|
| Price / Sales |
5.3x
|
3.0x
|
| Price / FCF |
33.4x
|
34.7x
|
| Revenue Growth YoY |
+10.5%
|
-5.5%
|
| Gross Margin |
40.4%
|
13.0%
|
| Operating Margin |
17.7%
|
2.3%
|
| Return on Equity |
13.4%
|
41.5%
|
| Dividend Yield |
0.28% |
0.65% |
| FCF Yield |
3.0%
|
2.88%
|
| Analyst Consensus |
Strong Buy
|
Strong Buy
|
Investment Thesis
Thermo Fisher Scientific is a global life-sciences and laboratory-services platform spanning Life Sciences Solutions, Analytical Instruments, Specialty Diagnostics, and Laboratory Products and Biopharma Services, with recognized brands including Thermo Scientific, Applied Biosystems, Invitrogen, Fisher Scientific, Patheon, and PPD, serving pharmaceutical, biotech, clinical, academic, and governme…
Vistra Corp. is a vertically integrated independent power producer and retail electricity supplier operating roughly 38,700 megawatts of generation across natural gas, nuclear, coal, solar, and battery storage, serving about 4.3 million retail customers in 20 states and the District of Columbia. The business quality is mixed: the diversified PJM and ERCOT fleet plus retail load is a genuine struc…
Accumulation Zones
| Metric |
TMO |
VST |
| Zone Low |
$647.50 |
$81.20 |
| Zone High |
$733.84 |
$92.03 |
| In Buy Zone? |
Yes
|
No
|