BLFS
Price
$27.84
Change
+$0.52 (+1.90%)
Updated
Oct 20, 04:59 PM (EDT)
Capitalization
1.31B
17 days until earnings call
Intraday Buy/Sell Signals
CSTL
Price
$23.01
Change
+$0.87 (+3.93%)
Updated
Oct 20, 04:59 PM (EDT)
Capitalization
642.24M
14 days until earnings call
Intraday Buy/Sell Signals
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BLFS vs CSTL

Header iconBLFS vs CSTL Comparison
Open Charts BLFS vs CSTLBanner chart's image
BioLife Solutions
Price$27.84
Change+$0.52 (+1.90%)
Volume$1.91K
Capitalization1.31B
Castle Biosciences
Price$23.01
Change+$0.87 (+3.93%)
Volume$6.83K
Capitalization642.24M
BLFS vs CSTL Comparison Chart in %
BLFS
Daily Signalchanged days ago
Gain/Loss if bought
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CSTL
Daily Signalchanged days ago
Gain/Loss if bought
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BLFS vs. CSTL commentary
Oct 20, 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 BLFS is a Hold and CSTL is a Hold.

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COMPARISON
Comparison
Oct 20, 2025
Stock price -- (BLFS: $27.32 vs. CSTL: $22.14)
Brand notoriety: BLFS and CSTL are both not notable
BLFS represents the Pharmaceuticals: Other, while CSTL is part of the Medical Specialties industry
Current volume relative to the 65-day Moving Average: BLFS: 60% vs. CSTL: 54%
Market capitalization -- BLFS: $1.31B vs. CSTL: $642.24M
BLFS [@Pharmaceuticals: Other] is valued at $1.31B. CSTL’s [@Medical Specialties] market capitalization is $642.24M. The market cap for tickers in the [@Pharmaceuticals: Other] industry ranges from $168.6B to $0. The market cap for tickers in the [@Medical Specialties] industry ranges from $3.82T to $0. The average market capitalization across the [@Pharmaceuticals: Other] industry is $11.58B. The average market capitalization across the [@Medical Specialties] industry is $11.58B.

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).

BLFS’s FA Score shows that 1 FA rating(s) are green whileCSTL’s FA Score has 0 green FA rating(s).

  • BLFS’s FA Score: 1 green, 4 red.
  • CSTL’s FA Score: 0 green, 5 red.
According to our system of comparison, BLFS 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.

BLFS’s TA Score shows that 6 TA indicator(s) are bullish while CSTL’s TA Score has 4 bullish TA indicator(s).

  • BLFS’s TA Score: 6 bullish, 3 bearish.
  • CSTL’s TA Score: 4 bullish, 3 bearish.
According to our system of comparison, BLFS is a better buy in the short-term than CSTL.

Price Growth

BLFS (@Pharmaceuticals: Other) experienced а +1.94% price change this week, while CSTL (@Medical Specialties) price change was -4.07% for the same time period.

The average weekly price growth across all stocks in the @Pharmaceuticals: Other industry was +0.61%. For the same industry, the average monthly price growth was +0.99%, and the average quarterly price growth was +13.55%.

The average weekly price growth across all stocks in the @Medical Specialties industry was +2.58%. For the same industry, the average monthly price growth was +5.04%, and the average quarterly price growth was +51.13%.

Reported Earning Dates

BLFS is expected to report earnings on Nov 06, 2025.

CSTL is expected to report earnings on Nov 03, 2025.

Industries' Descriptions

@Pharmaceuticals: Other (+0.61% weekly)

Pharmaceuticals (Other) comprise companies that are involved in the discovery, development or manufacturing of therapeutic and preventative medicines. They often collaborate with or acquire other pharmaceutical/healthcare firms. Examples of companies in this segment include Bausch Health Companies Inc., Icon Plc and Perrigo Company Plc.

@Medical Specialties (+2.58% 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
BLFS($1.31B) has a higher market cap than CSTL($642M). BLFS YTD gains are higher at: 5.239 vs. CSTL (-16.923). CSTL has higher annual earnings (EBITDA): 32.6M vs. BLFS (17.4M). CSTL has more cash in the bank: 276M vs. BLFS (81.8M). BLFS has less debt than CSTL: BLFS (23.8M) vs CSTL (37.4M). CSTL has higher revenues than BLFS: CSTL (346M) vs BLFS (93.5M).
BLFSCSTLBLFS / CSTL
Capitalization1.31B642M204%
EBITDA17.4M32.6M53%
Gain YTD5.239-16.923-31%
P/E RatioN/A30.24-
Revenue93.5M346M27%
Total Cash81.8M276M30%
Total Debt23.8M37.4M64%
FUNDAMENTALS RATINGS
BLFS vs CSTL: Fundamental Ratings
BLFS
CSTL
OUTLOOK RATING
1..100
2292
VALUATION
overvalued / fair valued / undervalued
1..100
99
Overvalued
57
Fair valued
PROFIT vs RISK RATING
1..100
98100
SMR RATING
1..100
9293
PRICE GROWTH RATING
1..100
4351
P/E GROWTH RATING
1..100
12100
SEASONALITY SCORE
1..100
5050

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 (57) in the null industry is somewhat better than the same rating for BLFS (99) in the Medical Specialties industry. This means that CSTL’s stock grew somewhat faster than BLFS’s over the last 12 months.

BLFS's Profit vs Risk Rating (98) in the Medical Specialties industry is in the same range as CSTL (100) in the null industry. This means that BLFS’s stock grew similarly to CSTL’s over the last 12 months.

BLFS's SMR Rating (92) in the Medical Specialties industry is in the same range as CSTL (93) in the null industry. This means that BLFS’s stock grew similarly to CSTL’s over the last 12 months.

BLFS's Price Growth Rating (43) in the Medical Specialties industry is in the same range as CSTL (51) in the null industry. This means that BLFS’s stock grew similarly to CSTL’s over the last 12 months.

BLFS's P/E Growth Rating (12) in the Medical Specialties industry is significantly better than the same rating for CSTL (100) in the null industry. This means that BLFS’s stock grew significantly faster than CSTL’s over the last 12 months.

TECHNICAL ANALYSIS
Technical Analysis
BLFSCSTL
RSI
ODDS (%)
Bearish Trend 4 days ago
84%
N/A
Stochastic
ODDS (%)
Bearish Trend 4 days ago
90%
Bullish Trend 4 days ago
80%
Momentum
ODDS (%)
Bullish Trend 4 days ago
81%
Bearish Trend 4 days ago
83%
MACD
ODDS (%)
Bullish Trend 4 days ago
90%
N/A
TrendWeek
ODDS (%)
Bullish Trend 4 days ago
78%
Bearish Trend 4 days ago
85%
TrendMonth
ODDS (%)
Bullish Trend 4 days ago
80%
Bullish Trend 4 days ago
77%
Advances
ODDS (%)
Bullish Trend 6 days ago
76%
Bullish Trend 5 days ago
78%
Declines
ODDS (%)
Bearish Trend 4 days ago
85%
Bearish Trend 7 days ago
84%
BollingerBands
ODDS (%)
Bullish Trend 4 days ago
82%
N/A
Aroon
ODDS (%)
Bullish Trend 4 days ago
83%
Bullish Trend 4 days ago
84%
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BLFS
Daily Signalchanged days ago
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CSTL
Daily Signalchanged days ago
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BLFS and

Correlation & Price change

A.I.dvisor indicates that over the last year, BLFS has been loosely correlated with RGEN. These tickers have moved in lockstep 58% of the time. This A.I.-generated data suggests there is some statistical probability that if BLFS jumps, then RGEN could also see price increases.

1D
1W
1M
1Q
6M
1Y
5Y
Ticker /
NAME
Correlation
To BLFS
1D Price
Change %
BLFS100%
-1.48%
RGEN - BLFS
58%
Loosely correlated
-1.26%
RVTY - BLFS
51%
Loosely correlated
-0.54%
A - BLFS
50%
Loosely correlated
+0.58%
DHR - BLFS
47%
Loosely correlated
-0.88%
ITGR - BLFS
46%
Loosely correlated
+1.66%
More

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%
-1.73%
TCMD - CSTL
50%
Loosely correlated
-1.09%
NTRA - CSTL
40%
Loosely correlated
+0.64%
FLGT - CSTL
39%
Loosely correlated
-0.53%
GH - CSTL
38%
Loosely correlated
-2.98%
OFIX - CSTL
38%
Loosely correlated
-1.25%
More