Sectors & Industries HealthcareDiagnostics & Research
Best Diagnostic & Research Stocks to Buy Now (2026)
Top diagnostic & research stocks in 2026 ranked by overall Zen Rating. "A" Rated stocks have returned an average of +28.50% per year, and are the best diagnostic & research stocks to buy now. Learn More.

Industry: Diagnostics & Research

Growth Financials Momentum Sentiment Forecast Dividends Due Diligence

Diagnostics & Research is Zen Rated B and is the 36th ranked industry out of 145 stock market industries

Ticker	Company	Price	Graham Fair Value	Graham Fair Value %	P/E	Forward P/E	P/S	P/B	PEG	Free Cash Flow	Free Cash Flow Yield	Book Value	BVPS	EV	EV/EBITDA
CDNA	CAREDX INC	$50.11	N/A	N/A	23.31x	41.57x	5.63x	6.09x	N/A	$84.71M	3.28%	$425.60M	8.27	$2.23B	17.53
SHC	SOTERA HEALTH CO	$18.90	$7.88	139.82%	33.16x	19.01x	4.44x	8.10x	1.19x	$112.70M	2.08%	$665.65M	2.33	$7.30B	13.72
A	AGILENT TECHNOLOGIES INC	$153.56	$47.79	221.30%	30.71x	24.45x	5.99x	6.09x	2.14x	$1.09B	2.51%	$7.12B	25.26	$44.92B	22.89
NEOG	NEOGEN CORP	$11.56	N/A	N/A	-289.00x	-68.00x	2.89x	1.20x	N/A	$32.00M	1.27%	$2.09B	9.62	$3.13B	18.35
DGX	QUEST DIAGNOSTICS INC	$240.30	$82.09	192.73%	25.19x	21.26x	2.31x	3.53x	2.22x	$1.35B	5.06%	$7.52B	67.71	$32.28B	14.55
ILMN	ILLUMINA INC	$213.63	$43.37	392.55%	39.56x	39.14x	7.18x	11.37x	4.14x	$938.00M	2.91%	$2.84B	18.80	$33.66B	24.31
TMO	THERMO FISHER SCIENTIFIC INC	$617.10	$197.94	211.76%	33.14x	24.32x	4.94x	4.33x	1.87x	$7.36B	3.22%	$52.68B	141.99	$266.66B	22.27
NEO	NEOGENOMICS INC	$17.91	N/A	N/A	-45.92x	96.97x	3.03x	2.93x	N/A	-$7.36M	-0.32%	$785.73M	6.06	$2.60B	127.41
LH	LABCORP HOLDINGS INC	$332.66	$145.45	128.71%	27.33x	17.59x	1.88x	3.13x	1.25x	$1.16B	4.28%	$8.61B	106.13	$33.60B	14.23
WAT	WATERS CORP	$414.63	$105.82	291.84%	102.89x	28.16x	8.77x	2.68x	1.54x	$401.29M	0.99%	$15.20B	154.73	$45.65B	47.19
IQV	IQVIA HOLDINGS INC	$261.19	$108.00	141.84%	32.17x	19.94x	2.55x	6.97x	1.23x	$2.26B	5.21%	$6.17B	37.15	$57.32B	16.00
NTRA	NATERA INC	$321.96	N/A	N/A	-238.49x	-234.34x	17.04x	25.48x	N/A	$84.20M	0.18%	$1.82B	12.71	$45.54B	-286.63
IDXX	IDEXX LABORATORIES INC	$556.69	$118.43	370.07%	38.85x	36.73x	9.65x	27.20x	3.78x	$1.24B	2.82%	$1.61B	20.42	$44.73B	27.67
BDSX	BIODESIX INC	$26.35	N/A	N/A	-8.47x	-9.48x	2.64x	30.40x	N/A	-$20.40M	-7.52%	$9.14M	0.89	$319.77M	-22.76
CSTL	CASTLE BIOSCIENCES INC	$33.03	N/A	N/A	-50.82x	-24.93x	2.81x	2.15x	N/A	-$452.00k	-0.05%	$470.03M	15.46	$983.58M	-303.95
MTD	METTLER TOLEDO INTERNATIONAL INC	$1,405.14	$353.39	297.62%	31.60x	29.42x	6.84x	2,195.60x	3.40x	$863.97M	3.06%	$12.82M	0.64	$30.21B	23.28
CRL	CHARLES RIVER LABORATORIES INTERNATIONAL INC	$288.24	N/A	N/A	-60.18x	25.15x	3.46x	4.85x	N/A	$370.61M	2.68%	$2.84B	59.13	$16.60B	76.02
RVTY	REVVITY INC	$128.67	$41.57	209.53%	61.56x	23.59x	4.93x	1.99x	1.32x	$570.15M	3.97%	$7.23B	64.78	$16.68B	21.62
XGN	EXAGEN INC	$7.34	N/A	N/A	-9.06x	-11.23x	2.49x	14.56x	N/A	-$7.58M	-4.28%	$12.22M	0.51	$180.88M	-17.54
DHR	DANAHER CORP	$213.56	$68.06	213.78%	37.80x	24.85x	6.00x	2.86x	1.71x	$5.49B	3.64%	$52.58B	74.55	$172.34B	22.68
MEDP	MEDPACE HOLDINGS INC	$593.99	$129.65	358.16%	34.20x	33.10x	6.01x	38.21x	4.40x	$706.69M	4.22%	$433.86M	15.40	$16.20B	25.42
ICLR	ICON PLC	$164.99	$85.27	93.48%	38.46x	15.28x	1.54x	1.36x	0.82x	$883.82M	6.97%	$9.38B	122.04	$15.29B	15.53
OPK	OPKO HEALTH INC	$1.47	N/A	N/A	-16.33x	-6.68x	1.89x	0.93x	N/A	-$133.73M	-12.04%	$1.18B	1.57	$1.19B	21.67
BLLN	BILLIONTOONE INC	$90.67	$10.73	744.85%	107.94x	112.31x	10.59x	7.97x	4.41x	$33.17M	0.79%	$536.81M	11.57	$3.87B	77.10
PRPO	PRECIPIO INC	$27.69	N/A	N/A	-43.27x	N/A	1.82x	3.36x	N/A	$789.00k	1.59%	$14.76M	8.26	$50.08M	74.42
TWST	TWIST BIOSCIENCE CORP	$139.00	N/A	N/A	-62.61x	-84.00x	20.09x	19.55x	N/A	-$93.22M	-1.07%	$445.74M	7.14	$8.71B	-78.81
RDNT	RADNET INC	$75.82	N/A	N/A	-280.81x	149.52x	2.60x	5.44x	N/A	$74.36M	1.26%	$1.10B	14.09	$7.42B	24.73
STIM	NEURONETICS INC	$2.84	N/A	N/A	-6.45x	-6.43x	1.34x	12.12x	N/A	-$11.23M	-5.39%	$17.85M	0.24	$277.98M	-15.12
QGEN	QIAGEN NV	$43.29	$18.91	128.94%	22.43x	17.19x	4.25x	2.67x	1.49x	$447.70M	5.01%	$3.36B	16.27	$9.83B	13.97
QUCY	QUANTUM CYBER NV	$1.57	N/A	N/A	-1.39x	-1.17x	92.35x	6.48x	N/A	-$14.48M	-62.17%	$20.36M	1.37	$118.78M	-5.37
GH	GUARDANT HEALTH INC	$159.02	N/A	N/A	-45.56x	-100.32x	17.86x	-95.75x	N/A	-$240.72M	-1.14%	-$222.87M	-1.68	$21.84B	-53.12
ADVB	ADVANCED BIOMED INC	$9.45	N/A	N/A	1.96x	N/A	N/A	1.42x	N/A	-$2.94M	-24.24%	$9.21M	7.17	$10.49M	1.95
GRAL	GRAIL INC	$79.37	N/A	N/A	-8.19x	-7.61x	20.71x	1.39x	N/A	-$296.16M	-8.66%	$2.54B	58.98	$3.57B	-9.55
BIAF	BIOAFFINITY TECHNOLOGIES INC	$4.56	N/A	N/A	-0.04x	-0.55x	0.27x	0.65x	N/A	-$11.56M	-727.54%	$3.77M	10.82	$1.47M	-0.10
ACRS	ACLARIS THERAPEUTICS INC	$6.05	N/A	N/A	-10.43x	-9.08x	104.31x	7.15x	N/A	-$62.18M	-7.21%	$124.58M	0.87	$871.39M	-11.57
MDXH	MDXHEALTH SA	$0.72	N/A	N/A	-0.10x	-1.20x	0.03x	-0.12x	N/A	-$6.02M	-162.78%	-$30.40M	-5.92	$129.47M	-49.64
IMDX	INSIGHT MOLECULAR DIAGNOSTICS INC	$3.92	N/A	N/A	-2.60x	-4.37x	87.11x	-6.02x	N/A	-$30.88M	-21.43%	-$21.30M	-0.58	$112.42M	-2.40
MYGN	MYRIAD GENETICS INC	$3.22	N/A	N/A	-2.73x	-4.14x	0.38x	1.01x	N/A	-$14.20M	-4.66%	$303.90M	3.21	$403.29M	-9.84
FLGT	FULGENT GENETICS INC	$19.37	N/A	N/A	-6.87x	-8.37x	1.67x	0.53x	N/A	-$103.78M	-19.13%	$1.00B	35.77	$507.15M	-7.99
SERA	SERA PROGNOSTICS INC	$2.12	N/A	N/A	-3.16x	-3.16x	2,120.00x	1.41x	N/A	-$28.15M	-26.32%	$59.38M	1.18	$82.24M	-2.57
DRIO	DARIOHEALTH CORP	$7.37	N/A	N/A	-1.20x	-2.14x	3.28x	1.31x	N/A	-$25.48M	-36.99%	$55.09M	5.90	$98.00M	-3.43
BNR	BURNING ROCK BIOTECH LTD	$9.45	N/A	N/A	-11.26x	N/A	1.31x	1.31x	N/A	-$5.69M	-5.72%	$76.06M	7.23	$40.81M	N/A
VNRX	VOLITIONRX LTD	$0.43	N/A	N/A	-0.11x	-0.19x	1.62x	-0.18x	N/A	-$19.58M	-492.86%	-$32.16M	-3.51	$14.54M	-0.62
TRIB	TRINITY BIOTECH PLC	$9.87	N/A	N/A	-0.16x	-19.75x	0.14x	-0.09x	N/A	-$11.81M	-191.79%	-$71.98M	-115.42	$139.00M	-10.61
NDRA	ENDRA LIFE SCIENCES INC	$5.01	N/A	N/A	-0.79x	-1.39x	N/A	1.19x	N/A	-$4.84M	-73.07%	$6.31M	4.77	$2.95M	-0.51
ISPC	ISPECIMEN INC	$1.54	N/A	N/A	-0.03x	N/A	4.61x	2.23x	N/A	-$8.70M	-405.32%	$1.74M	1.25	-$294.83k	0.03
PSNL	PERSONALIS INC	$16.78	N/A	N/A	-15.39x	-15.58x	25.39x	7.62x	N/A	-$100.86M	-5.70%	$235.16M	2.23	$1.73B	-17.92
FRNM	FREENOME INC	$14.79	N/A	N/A	-1.38x	N/A	11.40x	-1.20x	N/A	-$200.61M	-50.80%	-$1.32B	-49.59	$1.84B	-7.59
MBAI	CHECK-CAP LTD	$6.61	N/A	N/A	1.43x	N/A	N/A	1.93x	N/A	-$46.00k	-0.79%	$3.44M	3.86	$6.43M	1.55
XWEL	XWELL INC	$0.91	N/A	N/A	-0.17x	N/A	0.27x	-4.23x	N/A	-$13.48M	-173.93%	-$1.85M	-0.22	$2.79M	-0.13

Diagnostic & Research Stocks FAQ

What are the best diagnostic & research stocks to buy right now in Sep 2026?

According to Zen Ratings, our proprietary rating system that evaluates 115 factors proven to drive growth in stocks and assigns each stock in our system an overall letter grade as well as 7 individual Component Grades for Value, Growth, Momentum, Sentiment, Safety, Financials, and proprietary AI algorithms, the 3 best diagnostic & research stocks to buy right now are:

1. Caredx (NASDAQ:CDNA)

Caredx (NASDAQ:CDNA) is the #1 top diagnostic & research stock out of 50 with a Zen Rating of A. Stocks with a rating of A have had an average return of +28.5% per year. Learn more.

The Component Grade breakdown for Caredx (NASDAQ:CDNA) is: Value: C, Growth: B, Momentum: B, Sentiment: B, Safety: C, Financials: A, and AI: C.

Caredx (NASDAQ:CDNA) has a Due Diligence Score of 51, which is 22 points higher than the diagnostic & research industry average of 29.

CDNA passed 17 out of 33 due diligence checks and has strong fundamentals. Caredx has seen its stock return 261.81% over the past year, overperforming other diagnostic & research stocks by 239 percentage points.

Caredx has an average 1 year price target of $53.00, an upside of 5.77% from Caredx's current stock price of $50.11.

Caredx stock has a consensus Buy recommendation according to Wall Street analysts. Of the 2 analysts covering Caredx, 50% have issued a Strong Buy rating, 0% have issued a Buy, 50% have issued a hold, while 0% have issued a Sell rating, and 0% have issued a Strong Sell.

2. Sotera Health Co (NASDAQ:SHC)

Sotera Health Co (NASDAQ:SHC) is the #2 top diagnostic & research stock out of 50 with a Zen Rating of A. Stocks with a rating of A have had an average return of +28.5% per year. Learn more.

The Component Grade breakdown for Sotera Health Co (NASDAQ:SHC) is: Value: B, Growth: C, Momentum: C, Sentiment: B, Safety: B, Financials: B, and AI: C.

Sotera Health Co (NASDAQ:SHC) has a Due Diligence Score of 40, which is 11 points higher than the diagnostic & research industry average of 29.

SHC passed 14 out of 33 due diligence checks and has average fundamentals. Sotera Health Co has seen its stock return 16.96% over the past year, underperforming other diagnostic & research stocks by -6 percentage points.

Sotera Health Co has an average 1 year price target of $22.00, an upside of 16.4% from Sotera Health Co's current stock price of $18.90.

Sotera Health Co stock has a consensus Strong Buy recommendation according to Wall Street analysts. Of the 5 analysts covering Sotera Health Co, 80% have issued a Strong Buy rating, 0% have issued a Buy, 20% have issued a hold, while 0% have issued a Sell rating, and 0% have issued a Strong Sell.

3. Agilent Technologies (NYSE:A)

Agilent Technologies (NYSE:A) is the #3 top diagnostic & research stock out of 50 with a Zen Rating of B. Stocks with a rating of B have had an average return of +17.17% per year. Learn more.

The Component Grade breakdown for Agilent Technologies (NYSE:A) is: Value: B, Growth: C, Momentum: C, Sentiment: B, Safety: A, Financials: B, and AI: C.

Agilent Technologies (NYSE:A) has a Due Diligence Score of 51, which is 22 points higher than the diagnostic & research industry average of 29.

A passed 19 out of 38 due diligence checks and has strong fundamentals. Agilent Technologies has seen its stock return 22.64% over the past year.

Agilent Technologies has an average 1 year price target of $171.44, an upside of 11.64% from Agilent Technologies's current stock price of $153.56.

Agilent Technologies stock has a consensus Strong Buy recommendation according to Wall Street analysts. Of the 17 analysts covering Agilent Technologies, 64.71% have issued a Strong Buy rating, 23.53% have issued a Buy, 11.76% have issued a hold, while 0% have issued a Sell rating, and 0% have issued a Strong Sell.

What are the diagnostic & research stocks with highest dividends?

Out of 7 diagnostic & research stocks that have issued dividends in the past year, the 3 diagnostic & research stocks with the highest dividend yields are:

1. Qiagen Nv (NYSE:QGEN)

Qiagen Nv (NYSE:QGEN) has an annual dividend yield of 5.29%, which is 4 percentage points higher than the diagnostic & research industry average of 1.34%.

Qiagen Nv's dividend payout ratio of 243.6% indicates that its high dividend yield might not be sustainable for the long-term.

2. Quest Diagnostics (NYSE:DGX)

Quest Diagnostics (NYSE:DGX) has an annual dividend yield of 1.38%, which is the same as the diagnostic & research industry average of 1.34%. Quest Diagnostics's dividend payout is stable, having never dropped by more than 10% in the last 10 years. Quest Diagnostics's dividend has shown consistent growth over the last 10 years.

Quest Diagnostics's dividend payout ratio of 34.8% indicates that its dividend yield is sustainable for the long-term.

3. Labcorp Holdings (NYSE:LH)

Labcorp Holdings (NYSE:LH) has an annual dividend yield of 0.87%, which is the same as the diagnostic & research industry average of 1.34%. Labcorp Holdings's dividend payout is stable, having never dropped by more than 10% in the last 10 years. Labcorp Holdings's dividend has not shown consistent growth over the last 10 years.

Labcorp Holdings's dividend payout ratio of 23.7% indicates that its dividend yield is sustainable for the long-term.

Why are diagnostic & research stocks down?

Diagnostic & research stocks were down -0.54% in the last day, and down -1.12% over the last week. Volitionrx was the among the top losers in the diagnostics & research industry, dropping -3.34% yesterday.

VolitionRX shares are trading lower after the company filed a prospectus for an offering of 10 million shares.

What are the most undervalued diagnostic & research stocks?

Based on the Valuation rating, one of the 7 components of a stocks overall Zen Ratings grade, which evaluates factors including estimated earnings yield, earnings before interest and taxes/enterprise value, cash flow yield, free cash flow to price, and price-to-earnings growth (PEG ratio), the 3 most undervalued diagnostic & research stocks right now are:

1. Qiagen Nv (NYSE:QGEN)

Qiagen Nv (NYSE:QGEN) is the most undervalued diagnostic & research stock based on its Valuation Rating of A. Valuation is one of 7 Component Grades used to calculate the overall Zen Rating.

Qiagen Nv has a valuation score of 29, which is 16 points higher than the diagnostic & research industry average of 13. It passed 2 out of 7 valuation due diligence checks.

Qiagen Nv's stock has dropped -7.74% in the past year. It has underperformed other stocks in the diagnostic & research industry by -31 percentage points.

2. Icon (NASDAQ:ICLR)

Icon (NASDAQ:ICLR) is the second most undervalued diagnostic & research stock based on its Valuation Rating of B. Valuation is one of 7 Component Grades used to calculate the overall Zen Rating.

Icon has a valuation score of 43, which is 30 points higher than the diagnostic & research industry average of 13. It passed 3 out of 7 valuation due diligence checks.

Icon's stock has dropped -7.23% in the past year. It has underperformed other stocks in the diagnostic & research industry by -30 percentage points.

3. Thermo Fisher Scientific (NYSE:TMO)

Thermo Fisher Scientific (NYSE:TMO) is the third most undervalued diagnostic & research stock based on its Valuation Rating of B. Valuation is one of 7 Component Grades used to calculate the overall Zen Rating.

Thermo Fisher Scientific has a valuation score of 29, which is 16 points higher than the diagnostic & research industry average of 13. It passed 2 out of 7 valuation due diligence checks.

Thermo Fisher Scientific's stock has gained 26.58% in the past year. It has overperformed other stocks in the diagnostic & research industry by 4 percentage points.

Are diagnostic & research stocks a good buy now?

53.66% of diagnostic & research stocks rated by analysts are a strong buy right now. On average, analysts expect diagnostic & research stocks to rise by 2.82% over the next year.

5.13% of diagnostic & research stocks have a Zen Rating of A (Strong Buy), 17.95% of diagnostic & research stocks are rated B (Buy), 66.67% are rated C (Hold), 10.26% are rated D (Sell), and 0% are rated F (Strong Sell).

What is the average p/e ratio of the diagnostics & research industry?

The average P/E ratio of the diagnostics & research industry is 14.49x.

WallStreetZen does not provide financial advice and does not issue recommendations or offers to buy stock or sell any security.

Information is provided 'as-is' and solely for informational purposes and is not advice. WallStreetZen does not bear any responsibility for any losses or damage that may occur as a result of reliance on this data.

Diagnostic & Research Stocks FAQ

1. Caredx (NASDAQ:CDNA)

2. Sotera Health Co (NASDAQ:SHC)

3. Agilent Technologies (NYSE:A)

1. Qiagen Nv (NYSE:QGEN)

2. Quest Diagnostics (NYSE:DGX)

3. Labcorp Holdings (NYSE:LH)

1. Qiagen Nv (NYSE:QGEN)

2. Icon (NASDAQ:ICLR)

3. Thermo Fisher Scientific (NYSE:TMO)

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