CSTL
Price
$22.36
Change
-$0.35 (-1.54%)
Updated
Sep 29 closing price
Capitalization
648.63M
41 days until earnings call
NTRA
Price
$163.09
Change
+$0.12 (+0.07%)
Updated
Sep 29 closing price
Capitalization
22.37B
36 days until earnings call
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CSTL vs NTRA

Header iconCSTL vs NTRA Comparison
Open Charts CSTL vs NTRABanner chart's image
Castle Biosciences
Price$22.36
Change-$0.35 (-1.54%)
Volume$227.1K
Capitalization648.63M
Natera
Price$163.09
Change+$0.12 (+0.07%)
Volume$1.09M
Capitalization22.37B
CSTL vs NTRA Comparison Chart in %
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CSTL
Daily Signalchanged days ago
Gain/Loss if bought
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NTRA
Daily Signalchanged days ago
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CSTL vs. NTRA commentary
Sep 30, 2025

To compare these two companies we present long-term analysis, their fundamental ratings and make comparative short-term technical analysis which are presented below. The conclusion is CSTL is a Buy and NTRA is a Buy.

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COMPARISON
Comparison
Sep 30, 2025
Stock price -- (CSTL: $22.36 vs. NTRA: $163.09)
Brand notoriety: CSTL and NTRA are both not notable
Both companies represent the Medical Specialties industry
Current volume relative to the 65-day Moving Average: CSTL: 41% vs. NTRA: 83%
Market capitalization -- CSTL: $648.63M vs. NTRA: $22.37B
CSTL [@Medical Specialties] is valued at $648.63M. NTRA’s [@Medical Specialties] market capitalization is $22.37B. The market cap for tickers in the [@Medical Specialties] industry ranges from $3.82T to $0. The average market capitalization across the [@Medical Specialties] industry is $10.5B.

Long-Term Analysis

It is best to consider a long-term outlook for a ticker by using Fundamental Analysis (FA) ratings. The rating of 1 to 100, where 1 is best and 100 is worst, is divided into thirds. The first third (a green rating of 1-33) indicates that the ticker is undervalued; the second third (a grey number between 34 and 66) means that the ticker is valued fairly; and the last third (red number of 67 to 100) reflects that the ticker is undervalued. We use an FA Score to show how many ratings show the ticker to be undervalued (green) or overvalued (red).

CSTL’s FA Score shows that 0 FA rating(s) are green whileNTRA’s FA Score has 0 green FA rating(s).

  • CSTL’s FA Score: 0 green, 5 red.
  • NTRA’s FA Score: 0 green, 5 red.
According to our system of comparison, NTRA is a better buy in the long-term than CSTL.

Short-Term Analysis

It is best to consider a short-term outlook for a ticker by using Technical Analysis (TA) indicators. We use Odds of Success as the percentage of outcomes which confirm successful trade signals in the past.

If the Odds of Success (the likelihood of the continuation of a trend) for each indicator are greater than 50%, then the generated signal is confirmed. A green percentage from 90% to 51% indicates that the ticker is in a bullish trend. A red percentage from 90% - 51% indicates that the ticker is in a bearish trend. All grey percentages are below 50% and are considered not to confirm the trend signal.

CSTL’s TA Score shows that 3 TA indicator(s) are bullish while NTRA’s TA Score has 4 bullish TA indicator(s).

  • CSTL’s TA Score: 3 bullish, 5 bearish.
  • NTRA’s TA Score: 4 bullish, 5 bearish.
According to our system of comparison, NTRA is a better buy in the short-term than CSTL.

Price Growth

CSTL (@Medical Specialties) experienced а -7.14% price change this week, while NTRA (@Medical Specialties) price change was -8.98% for the same time period.

The average weekly price growth across all stocks in the @Medical Specialties industry was -0.49%. For the same industry, the average monthly price growth was +3.97%, and the average quarterly price growth was +21.89%.

Reported Earning Dates

CSTL is expected to report earnings on Nov 10, 2025.

NTRA is expected to report earnings on Nov 05, 2025.

Industries' Descriptions

@Medical Specialties (-0.49% weekly)

Medical specialties are companies that make equipment used by the health care industry. Equipment manufactured and distributed by these companies include dialysis machines, blood analysis equipment, surgical equipment, dental instruments, and diagnostic tools, among other items. Large companies typically aim to produce and distribute high-quality products across a broad market spectrum. Smaller firms are more likely to specialize in a particular market segment. Due to the industry’s close association with medical treatments, they typically have low sensitivity to macroeconomic fluctuations. Within this industry, Abbott Laboratories, Medtronic Plc and Thermo Fisher Scientific Inc. are some of the companies with multi-billion market capitalizations in the U.S. stock markets.

SUMMARIES
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FUNDAMENTALS
Fundamentals
NTRA($22.4B) has a higher market cap than CSTL($649M). NTRA YTD gains are higher at: 3.026 vs. CSTL (-16.098). CSTL has higher annual earnings (EBITDA): 32.6M vs. NTRA (-211.86M). NTRA has more cash in the bank: 1.02B vs. CSTL (276M). CSTL has less debt than NTRA: CSTL (37.4M) vs NTRA (196M). NTRA has higher revenues than CSTL: NTRA (1.96B) vs CSTL (346M).
CSTLNTRACSTL / NTRA
Capitalization649M22.4B3%
EBITDA32.6M-211.86M-15%
Gain YTD-16.0983.026-532%
P/E Ratio30.24N/A-
Revenue346M1.96B18%
Total Cash276M1.02B27%
Total Debt37.4M196M19%
FUNDAMENTALS RATINGS
CSTL vs NTRA: Fundamental Ratings
CSTL
NTRA
OUTLOOK RATING
1..100
8466
VALUATION
overvalued / fair valued / undervalued
1..100
58
Fair valued
63
Fair valued
PROFIT vs RISK RATING
1..100
10045
SMR RATING
1..100
9296
PRICE GROWTH RATING
1..100
5951
P/E GROWTH RATING
1..100
100100
SEASONALITY SCORE
1..100
n/a85

Tickeron ratings are formulated such that a rating of 1 designates the most successful stocks in a given industry, while a rating of 100 points to the least successful stocks for that industry.

CSTL's Valuation (58) in the null industry is in the same range as NTRA (63) in the Biotechnology industry. This means that CSTL’s stock grew similarly to NTRA’s over the last 12 months.

NTRA's Profit vs Risk Rating (45) in the Biotechnology industry is somewhat better than the same rating for CSTL (100) in the null industry. This means that NTRA’s stock grew somewhat faster than CSTL’s over the last 12 months.

CSTL's SMR Rating (92) in the null industry is in the same range as NTRA (96) in the Biotechnology industry. This means that CSTL’s stock grew similarly to NTRA’s over the last 12 months.

NTRA's Price Growth Rating (51) in the Biotechnology industry is in the same range as CSTL (59) in the null industry. This means that NTRA’s stock grew similarly to CSTL’s over the last 12 months.

NTRA's P/E Growth Rating (100) in the Biotechnology industry is in the same range as CSTL (100) in the null industry. This means that NTRA’s stock grew similarly to CSTL’s over the last 12 months.

TECHNICAL ANALYSIS
Technical Analysis
CSTLNTRA
RSI
ODDS (%)
Bearish Trend 1 day ago
77%
Bearish Trend 1 day ago
78%
Stochastic
ODDS (%)
Bearish Trend 1 day ago
90%
Bullish Trend 1 day ago
84%
Momentum
ODDS (%)
Bullish Trend 1 day ago
83%
Bearish Trend 1 day ago
85%
MACD
ODDS (%)
Bearish Trend 1 day ago
83%
Bearish Trend 1 day ago
80%
TrendWeek
ODDS (%)
Bearish Trend 1 day ago
85%
Bearish Trend 1 day ago
78%
TrendMonth
ODDS (%)
Bullish Trend 1 day ago
77%
Bullish Trend 1 day ago
81%
Advances
ODDS (%)
Bullish Trend 12 days ago
79%
Bullish Trend 12 days ago
82%
Declines
ODDS (%)
Bearish Trend 1 day ago
84%
Bearish Trend 5 days ago
81%
BollingerBands
ODDS (%)
Bearish Trend 5 days ago
78%
Bearish Trend 1 day ago
73%
Aroon
ODDS (%)
Bullish Trend 1 day ago
87%
Bullish Trend 1 day ago
80%
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CSTL
Daily Signalchanged days ago
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NTRA
Daily Signalchanged days ago
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CSTL and

Correlation & Price change

A.I.dvisor indicates that over the last year, CSTL has been loosely correlated with TCMD. These tickers have moved in lockstep 50% of the time. This A.I.-generated data suggests there is some statistical probability that if CSTL jumps, then TCMD could also see price increases.

1D
1W
1M
1Q
6M
1Y
5Y
Ticker /
NAME
Correlation
To CSTL
1D Price
Change %
CSTL100%
-1.54%
TCMD - CSTL
50%
Loosely correlated
+0.36%
NTRA - CSTL
41%
Loosely correlated
+0.07%
FLGT - CSTL
39%
Loosely correlated
-1.28%
GH - CSTL
38%
Loosely correlated
+3.27%
OFIX - CSTL
38%
Loosely correlated
+0.49%
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