What is the P/E ratio for Castle Biosciences, Inc. (CSTL)?

The P/E ratio for CSTL stock is N/A.

What is the TTM average P/E ratio for Castle Biosciences, Inc. (CSTL)?

The TTM average P/E ratio for CSTL stock is 100.60.

What is the 3Y average P/E ratio for Castle Biosciences, Inc. (CSTL)?

The 3Y average P/E ratio for CSTL stock is 100.60.

What is the 5Y average P/E ratio for Castle Biosciences, Inc. (CSTL)?

The 5Y average P/E ratio for CSTL stock is 255.09.

Castle Biosciences (CSTL) PE Ratio: History & Chart

Basis: FMP quote price / unrounded diluted EPS from four consecutive issuer fiscal quarters. Source: stored company filings and market data; unavailable inputs remain N/A.

The P/E ratio is N/A as of 2026-10-06T16:26:22.812Z.

Stored calculation inputs

Calculation as of: 2026-10-06T16:26:22.812Z.

Quote observation: 2026-10-06T16:25:15.000Z. Amounts in USD. The price header may show a later quote.

Quote price: 34.0237
Unrounded diluted TTM EPS · period ending 2026-06-30: -0.6567

FMP input reference: 1b199ac63604ed67463567be6e31784e7c30cd10ce6e12a6b441e61f1537d336

Forward PE Ratio|PEG Ratio|P/B Ratio|EPS|All Metrics

CSTL PE Ratio Metrics

PE RATIO

N/A

PE RATIO AVG TTM

100.60

PE RATIO AVG 3Y

100.60

PE RATIO AVG 5Y

255.09

PE RATIO AVG 10Y

N/A

PE RATIO AVG 15Y

N/A

PE RATIO AVG 20Y

N/A

CURRENT VS TTM AVG

N/A

CURRENT VS 3Y AVG

N/A

CURRENT VS 5Y AVG

N/A

CURRENT VS 10Y AVG

N/A

CURRENT VS 15Y AVG

N/A

CURRENT VS 20Y AVG

N/A

CSTL Competitors' PE Ratio

CSTL

Castle Biosciences, Inc.

Current

Market Cap

$1.04B

PE Ratio

N/A

TTM Avg

100.60

3Y Avg

100.60

5Y Avg

255.09

IMTX

Immatics N.V.

vs CSTL

Market Cap

$1.04B

PE Ratio

N/A

TTM Avg

31.31

3Y Avg

24.04

5Y Avg

24.04

IART

Integra LifeSciences Holdings Corporation

vs CSTL

Market Cap

$1.03B

PE Ratio

N/A

TTM Avg

50.11

3Y Avg

34.45

5Y Avg

50.26

JANX

Janux Therapeutics, Inc.

vs CSTL

Market Cap

$1.05B

PE Ratio

N/A

TTM Avg

N/A

3Y Avg

N/A

5Y Avg

N/A

TDOC

Teladoc Health, Inc.

vs CSTL

Market Cap

$1.05B

PE Ratio

N/A

TTM Avg

N/A

3Y Avg

N/A

5Y Avg

N/A

CGEM

Cullinan Therapeutics, Inc.

vs CSTL

Market Cap

$1.06B

PE Ratio

N/A

TTM Avg

5.99

3Y Avg

5.99

5Y Avg

5.99

LMRI

Lumexa Imaging Holdings, Inc. Common Stock

vs CSTL

Market Cap

$1.02B

PE Ratio

N/A

TTM Avg

N/A

3Y Avg

N/A

5Y Avg

N/A

LTGO

Latigo Biotherapeutics Inc.

vs CSTL

Market Cap

$1.00B

PE Ratio

N/A

TTM Avg

N/A

3Y Avg

N/A

5Y Avg

N/A

LBRX

LB Pharmaceuticals Inc Common Stock

vs CSTL

Market Cap

$999.27M

PE Ratio

N/A

TTM Avg

N/A

3Y Avg

N/A

5Y Avg

N/A

IRMD

IRadimed Corporation

vs CSTL

Market Cap

$1.08B

PE Ratio

47.38

TTM Avg

53.07

3Y Avg

41.22

5Y Avg

45.14

NAME	MARKET CAP	PE RATIO	TTM	3Y	5Y
Castle Biosciences, Inc. (CSTL)	$1.04B	N/A	100.60	100.60	255.09
Immatics N.V. (IMTX)vs ›	$1.04B	N/A	31.31	24.04	24.04
Integra LifeSciences Holdings Corporation (IART)vs ›	$1.03B	N/A	50.11	34.45	50.26
Janux Therapeutics, Inc. (JANX)vs ›	$1.05B	N/A	N/A	N/A	N/A
Teladoc Health, Inc. (TDOC)vs ›	$1.05B	N/A	N/A	N/A	N/A
Cullinan Therapeutics, Inc. (CGEM)vs ›	$1.06B	N/A	5.99	5.99	5.99
Lumexa Imaging Holdings, Inc. Common Stock (LMRI)vs ›	$1.02B	N/A	N/A	N/A	N/A
Latigo Biotherapeutics Inc. (LTGO)vs ›	$1.00B	N/A	N/A	N/A	N/A
LB Pharmaceuticals Inc Common Stock (LBRX)vs ›	$999.27M	N/A	N/A	N/A	N/A
IRadimed Corporation (IRMD)vs ›	$1.08B	47.38	53.07	41.22	45.14

P/E Comparison

Trailing P/E

N/A

Forward P/E

N/A

Forward P/E Calculation

View All Analyst Estimates

Forward P/E is calculated using analyst consensus EPS estimates for the current or next fiscal year.

Calculation:

Current Price

$34.02

÷

Forward EPS (Est.)

$-1.27

=

Forward P/E

N/A

Source: FMP Analyst Consensus Estimates. Forward EPS represents the average analyst estimate for the nearest fiscal year.

PE Ratio Formula & Definition

PE Ratio = Share Price / Diluted EPS (TTM)

The price-to-earnings ratio measures how much investors pay for each dollar of trailing earnings. A lower PE can indicate a cheaper valuation; a higher PE implies higher growth expectations.

Expanded definitions: Investopedia, Wikipedia, Corporate Finance Institute

PE Ratio FAQ

What is the P/E ratio for Castle Biosciences, Inc. (CSTL)?: The P/E ratio for CSTL stock is N/A.
What is the TTM average P/E ratio for Castle Biosciences, Inc. (CSTL)?: The TTM average P/E ratio for CSTL stock is 100.60.
What is the 3Y average P/E ratio for Castle Biosciences, Inc. (CSTL)?: The 3Y average P/E ratio for CSTL stock is 100.60.
What is the 5Y average P/E ratio for Castle Biosciences, Inc. (CSTL)?: The 5Y average P/E ratio for CSTL stock is 255.09.

CSTL PE Ratio History

DATE	PE RATIO
2025-05-05	30.38
2025-05-02	31.35
2025-05-01	31.29
2025-04-30	32.49
2025-04-29	32.16
2025-04-28	32.55
2025-04-25	33.43
2025-04-24	33.91
2025-04-23	34.46
2025-04-22	35.61
2025-04-21	34.25
2025-04-17	34.85
2025-04-16	34.45
2025-04-15	34.11
2025-04-14	32.23
2025-04-11	31.92
2025-04-10	31.27
2025-04-09	32.58
2025-04-08	30.14
2025-04-07	30.93
2025-04-04	30.09
2025-04-03	31.09
2025-04-02	32.71
2025-04-01	32.05
2025-03-31	32.44
2025-03-28	32.31
2025-03-27	32.57
2025-03-26	32.53
2025-03-25	33.77
2025-03-24	33.99
2025-03-21	33.25
2025-03-20	32.52
2025-03-19	33.28
2025-03-18	33.20
2025-03-17	32.45
2025-03-14	31.25
2025-03-13	30.40
2025-03-12	31.80
2025-03-11	31.66
2025-03-10	30.67
2025-03-07	32.74
2025-03-06	33.36
2025-03-05	34.54
2025-03-04	36.02
2025-03-03	34.46
2025-02-28	35.13
2025-02-27	125.09
2025-02-26	128.85
2025-02-25	124.15
2025-02-24	125.48
2025-02-21	127.41
2025-02-20	129.39
2025-02-19	134.54
2025-02-18	132.21
2025-02-14	135.18
2025-02-13	136.62
2025-02-12	137.80
2025-02-11	139.14
2025-02-10	137.11
2025-02-07	136.57
2025-02-06	137.70
2025-02-05	139.14
2025-02-04	139.29
2025-02-03	142.26
2025-01-31	139.88
2025-01-30	139.63
2025-01-29	136.02
2025-01-28	133.89
2025-01-27	131.87
2025-01-24	130.83
2025-01-23	131.12
2025-01-22	131.72
2025-01-21	132.21
2025-01-17	123.40
2025-01-16	124.15
2025-01-15	123.80
2025-01-14	125.98
2025-01-13	129.39
2025-01-10	149.68
2025-01-08	161.90
2025-01-07	159.18
2025-01-06	145.27
2025-01-03	141.56
2025-01-02	138.74
2024-12-31	131.87
2024-12-30	131.91
2024-12-27	132.76
2024-12-26	134.09
2024-12-24	137.16
2024-12-23	135.97
2024-12-20	136.22
2024-12-19	134.04
2024-12-18	131.22
2024-12-17	139.24
2024-12-16	142.50
2024-12-13	142.85
2024-12-12	144.09
2024-12-11	145.87
2024-12-10	146.61
2024-12-09	152.94
2024-12-06	154.33
2024-12-05	159.13
2024-12-04	157.74
2024-12-03	152.30
2024-12-02	155.37
2024-11-29	149.83
2024-11-27	150.62
2024-11-26	151.26
2024-11-25	146.02
2024-11-22	147.50
2024-11-21	142.90
2024-11-20	140.77
2024-11-19	142.85
2024-11-18	138.05
2024-11-15	139.04
2024-11-14	152.55
2024-11-13	157.35
2024-11-12	162.20
2024-11-11	167.14
2024-11-08	164.72
2024-11-07	164.82
2024-11-06	161.60
2024-11-05	154.13
2020-11-09	434.36
2020-11-06	470.00
2020-11-05	475.55
2020-11-04	458.45
2020-11-03	436.36
2020-11-02	425.18
2020-10-30	422.09
2020-10-29	428.27
2020-10-28	448.36
2020-10-27	465.82
2020-10-26	463.45
2020-10-23	471.27
2020-10-22	466.73
2020-10-21	442.73
2020-10-20	447.09
2020-10-19	451.91
2020-10-16	454.27
2020-10-15	461.73
2020-10-14	479.91
2020-10-13	498.64
2020-10-12	498.64
2020-10-09	498.73
2020-10-08	489.73
2020-10-07	490.45
2020-10-06	483.82
2020-10-05	483.55
2020-10-02	467.55
2020-10-01	469.09
2020-09-30	467.73
2020-09-29	459.36
2020-09-28	454.55
2020-09-25	451.09
2020-09-24	452.27
2020-09-23	457.18
2020-09-22	467.27
2020-09-21	473.00
2020-09-18	464.00
2020-09-17	441.64
2020-09-16	436.73
2020-09-15	440.73
2020-09-14	450.55
2020-09-11	441.82
2020-09-10	445.36
2020-09-09	455.36
2020-09-08	442.55
2020-09-04	436.82
2020-09-03	420.64
2020-09-02	416.55
2020-09-01	419.09
2020-08-31	415.73
2020-08-28	414.18
2020-08-27	416.36
2020-08-26	416.36
2020-08-25	416.91
2020-08-24	414.45
2020-08-21	416.18
2020-08-20	413.82
2020-08-19	416.27
2020-08-18	396.27
2020-08-17	397.00
2020-08-14	375.64
2020-08-13	373.18
2020-08-12	380.73
2020-08-11	380.45
2020-08-10	384.99
2020-08-07	387.40
2020-08-06	386.01
2020-08-05	390.92
2020-08-04	383.32
2020-08-03	373.68
2020-07-31	358.85
2020-07-30	364.23
2020-07-29	359.13
2020-07-28	367.47
2020-07-27	369.60
2020-07-24	361.82
2020-07-23	371.73
2020-07-22	371.18
2020-07-21	378.31
2020-07-20	394.81
2020-07-17	398.42
2020-07-16	398.80
2020-07-15	417.98
2020-07-14	398.24
2020-07-13	384.62
2020-07-10	386.93
2020-07-09	406.30
2020-07-08	389.16
2020-07-07	378.87
2020-07-06	368.03
2020-07-02	356.53
2020-07-01	362.56
2020-06-30	349.30
2020-06-29	335.59
2020-06-26	325.21
2020-06-25	343.19
2020-06-24	365.25
2020-06-23	398.61
2020-06-22	388.14
2020-06-19	392.77
2020-06-18	398.05
2020-06-17	360.24
2020-06-16	360.89
2020-06-15	359.31
2020-06-12	343.10
2020-06-11	342.72
2020-06-10	357.28
2020-06-09	355.51
2020-06-08	348.66
2020-06-05	349.30
2020-06-04	347.54
2020-06-03	336.89
2020-06-02	356.35
2020-06-01	357.74
2020-05-29	356.16
2020-05-28	353.85
2020-05-27	354.49
2020-05-26	342.91
2020-05-22	351.53
2020-05-21	345.78
2020-05-20	346.99
2020-05-19	336.05
2020-05-18	330.40
2020-05-15	347.08
2020-05-14	328.08
2020-05-13	318.72
2020-05-12	341.80
2020-03-10	148.36
2020-03-09	148.66
2020-03-06	162.66
2020-03-05	164.27
2020-03-04	156.24
2020-03-03	149.77
2020-03-02	155.63
2020-02-28	151.29
2020-02-27	151.19
2020-02-26	135.52

Showing the most recent 260 of 330 data points. The chart above shows the full history.

See the Lowest P/E Ratio Stocks ranking →

PE Ratio: N/A

CSTL PE Ratio Chart

CSTL Average PE Ratio Chart

CSTL PE Ratio Metrics

CSTL Competitors' PE Ratio

P/E Comparison

Forward P/E Calculation

PE Ratio Formula & Definition

PE Ratio FAQ

CSTL PE Ratio History

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