Stock listing
BOATS:CSTL Castle Biosciences, Inc. Stock
US listing (BOATS) of Castle Biosciences, Inc. · home listing NASDAQ:CSTL
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Home listing price · NASDAQ:CSTL
$37.16 USD -1.35 (-3.5%)
Close on Oct 30, 2026 · This listing has no price on 6ix; the price shown is the home listing's, NASDAQ:CSTL
- Day range
- $36.73 – $38.43 USDOct 30, 2026
- Volume
- 334,258 sharesOct 30, 2026
- Market cap
- $1.14B USDAt the close on Oct 30, 2026 · price × 30.55M shares outstanding
- 52-week range
- $17.72 – $44.28 USDLowest and highest trades, Oct 31, 2025 – Oct 30, 2026
- Traded on an average day
- $13.30M USDMedian day 359,933 shares · last 3 months, Jul 30, 2026 – Oct 30, 2026
Prices by listing
| Listing | Last | Change | Volume | Open | High | Low | Previous close | Price from |
|---|---|---|---|---|---|---|---|---|
| NASDAQ:CSTL · Home | $37.16 USD | -1.35 (-3.5%) | 334,258 | $38.03 | $38.43 | $36.73 | $38.51 | Close on Oct 30, 2026 |
Daily closes
Last 3 months, Jul 30, 2026 – Oct 30, 2026 · NASDAQ:CSTL · USD, adjusted for splits
| Day | Close | Change | % | Open | High | Low | Volume |
|---|---|---|---|---|---|---|---|
| $37.16 | -1.35 | -3.5% | $38.03 | $38.43 | $36.73 | 334,258 | |
| $38.51 | +1.83 | +5.0% | $37.57 | $38.73 | $36.09 | 723,808 | |
| $36.68 | +2.17 | +6.3% | $34.51 | $37.38 | $34.51 | 431,159 | |
| $34.51 | +1.21 | +3.6% | $33.55 | $34.66 | $33.19 | 295,208 | |
| $33.30 | +0.22 | +0.7% | $33.20 | $33.79 | $32.84 | 235,840 | |
| $33.08 | -0.11 | -0.3% | $33.41 | $33.62 | $32.69 | 202,877 | |
| $33.19 | -1.18 | -3.4% | $34.13 | $34.55 | $33.06 | 335,419 | |
| $34.37 | +1.22 | +3.7% | $33.15 | $34.72 | $32.93 | 336,592 | |
| $33.15 | +0.985 | +3.1% | $32.65 | $33.55 | $32.09 | 272,493 | |
| $32.17 | +0.205 | +0.6% | $32.44 | $32.74 | $31.67 | 347,233 | |
| $31.96 | -1.84 | -5.4% | $33.82 | $34.15 | $31.80 | 381,900 | |
| $33.80 | +0.69 | +2.1% | $33.13 | $34.06 | $32.48 | 381,900 | |
| $33.11 | +0.23 | +0.7% | $32.47 | $33.77 | $32.47 | 243,200 | |
| $32.88 | +0.12 | +0.4% | $32.79 | $33.35 | $32.23 | 241,700 | |
| $32.76 | -1.66 | -4.8% | $34.42 | $34.42 | $32.31 | 239,000 | |
| $34.42 | +0.71 | +2.1% | $33.52 | $34.52 | $33.39 | 249,100 | |
| $33.71 | +0.71 | +2.2% | $32.54 | $33.76 | $32.25 | 373,800 | |
| $33.00 | -0.36 | -1.1% | $33.15 | $33.72 | $32.77 | 351,500 | |
| $33.36 | -3.29 | -9.0% | $36.65 | $37.99 | $33.10 | 609,100 | |
| $36.65 | +1.09 | +3.1% | $35.45 | $36.76 | $35.10 | 377,200 | |
| $35.56 | +0.305 | +0.9% | $35.56 | $35.92 | $34.75 | 167,700 | |
| $35.26 | -0.275 | -0.8% | $36.10 | $36.99 | $35.17 | 522,300 | |
| $35.53 | +0.65 | +1.9% | $34.90 | $36.03 | $34.14 | 639,600 | |
| $34.88 | -1.05 | -2.9% | $35.72 | $36.24 | $34.24 | 318,600 | |
| $35.93 | +0.12 | +0.3% | $35.81 | $36.27 | $35.09 | 228,400 | |
| $35.81 | +0.62 | +1.8% | $35.19 | $36.12 | $34.44 | 437,700 | |
| $35.19 | +0.31 | +0.9% | $34.88 | $35.84 | $33.90 | 439,200 | |
| $34.88 | +0.03 | +0.1% | $34.74 | $34.97 | $33.99 | 348,300 | |
| $34.85 | -0.14 | -0.4% | $35.53 | $35.53 | $34.57 | 431,000 | |
| $34.99 | -0.35 | -1.0% | $35.68 | $35.68 | $34.48 | 391,700 | |
| $35.34 | -1.44 | -3.9% | $36.54 | $36.54 | $35.29 | 530,200 | |
| $36.78 | +1.30 | +3.7% | $35.98 | $36.85 | $34.94 | 364,600 | |
| $35.48 | -0.02 | -0.1% | $35.50 | $36.82 | $35.26 | 559,300 | |
| $35.50 | +2.06 | +6.2% | $33.64 | $35.69 | $33.64 | 519,800 | |
| $33.44 | +1.11 | +3.4% | $32.30 | $33.53 | $32.16 | 165,400 | |
| $32.33 | +0.01 | 0.0% | $32.77 | $32.94 | $31.71 | 224,200 | |
| $32.32 | +0.01 | 0.0% | $31.97 | $32.70 | $31.44 | 237,800 | |
| $32.31 | -0.45 | -1.4% | $32.43 | $33.03 | $32.00 | 194,600 | |
| $32.76 | -0.15 | -0.5% | $32.57 | $33.58 | $32.28 | 217,000 | |
| $32.91 | +0.26 | +0.8% | $32.32 | $33.21 | $31.99 | 187,700 | |
| $32.65 | -0.77 | -2.3% | $33.50 | $34.00 | $32.38 | 268,000 | |
| $33.42 | -0.02 | -0.1% | $33.36 | $34.73 | $32.69 | 200,300 | |
| $33.44 | +0.41 | +1.2% | $33.00 | $34.09 | $32.89 | 396,200 | |
| $33.03 | -0.47 | -1.4% | $33.03 | $33.30 | $32.36 | 258,000 | |
| $33.50 | -0.76 | -2.2% | $34.02 | $34.28 | $32.80 | 372,600 | |
| $34.26 | +0.18 | +0.5% | $34.01 | $34.89 | $33.98 | 251,200 | |
| $34.08 | -0.92 | -2.6% | $34.80 | $34.84 | $33.62 | 456,300 | |
| $35.00 | +1.53 | +4.6% | $33.47 | $35.20 | $33.29 | 483,371 | |
| $33.47 | -0.73 | -2.1% | $33.65 | $34.54 | $31.70 | 357,666 | |
| $34.20 | +1.27 | +3.9% | $32.85 | $34.70 | $32.14 | 573,500 | |
| $32.93 | +0.61 | +1.9% | $32.41 | $34.01 | $32.41 | 322,900 | |
| $32.32 | +3.29 | +11.3% | $29.03 | $32.39 | $29.03 | 451,900 | |
| $29.03 | -0.92 | -3.1% | $29.89 | $30.13 | $28.72 | 596,600 | |
| $29.95 | +0.33 | +1.1% | $29.50 | $30.50 | $29.21 | 225,800 | |
| $29.62 | -0.93 | -3.0% | $30.93 | $31.12 | $29.58 | 264,200 | |
| $30.55 | -0.88 | -2.8% | $31.62 | $31.97 | $30.51 | 362,200 | |
| $31.43 | -0.81 | -2.5% | $32.43 | $33.00 | $31.25 | 436,000 | |
| $32.24 | -0.11 | -0.3% | $32.34 | $32.99 | $31.46 | 313,500 | |
| $32.35 | +0.32 | +1.0% | $31.86 | $33.06 | $31.24 | 400,700 | |
| $32.03 | +1.56 | +5.1% | $30.88 | $32.37 | $30.65 | 241,800 | |
| $30.47 | +0.07 | +0.2% | $30.20 | $30.75 | $29.50 | 833,400 | |
| $30.40 | -0.78 | -2.5% | $31.18 | $31.42 | $30.10 | 520,200 | |
| $31.18 | +0.79 | +2.6% | $30.18 | $31.73 | $29.99 | 675,100 | |
| $30.39 | +2.39 | +8.5% | $27.83 | $30.73 | $27.83 | 783,900 | |
| $28.00 | +1.21 | +4.5% | $28.75 | $30.81 | $27.50 | 1,757,800 | |
| $26.79 | +2.33 | +9.5% | $24.50 | $27.13 | $24.50 | 716,300 |
- Ticker
- BOATS:CSTL
- Asset type
- Stock
- Sector
- Health care
- Industry
- Diagnostics & research services
- Exchange
- BOATS
- Currency
- USD
What changed lately
Latest news release · Oct 28, 2026
Castle Biosciences to Participate in Upcoming Investor Conferences
Latest earnings call · Jul 30, 2026
Castle Biosciences (NASDAQ:CSTL) Q2 2026 Earnings Call
Replay and transcript
Latest deck · Jul 30, 2026
Q2 2026 Earnings Presentation
Earnings · 34 slides
Calls
Upcoming
Castle Biosciences (NASDAQ:CSTL) Q3 2026 Earnings Call
Thu, Nov 05, 2026 · 4:30 PM ET
Register
Replays
Castle Biosciences (NASDAQ:CSTL) Q2 2026 Earnings Call
Thu, Jul 30, 2026 · 4:30 PM ET
Watch TranscriptCastle Biosciences (NASDAQ:CSTL) Q1 2026 Earnings Call
Wed, May 06, 2026 · 4:30 PM ET
Watch TranscriptCastle Biosciences (NASDAQ:CSTL) Q4 2025 Earnings Call
Thu, Feb 26, 2026 · 4:30 PM ET
Watch Transcript
Latest news
Castle Biosciences to Participate in Upcoming Investor Conferences
Oct 28, 2026
Closed $36.68 (+6.3%) on Oct 28, 2026
Castle Biosciences to Release Third Quarter 2026 Financial Results and Host Webcast on Thursday, Nov. 5, 2026
Oct 15, 2026
Closed $33.80 (+2.1%) on Oct 15, 2026
ACG 2026 Data Show TissueCypher® Identifies Elevated Risk of Progression Beyond Pathology Findings in Barrett's Esophagus
Oct 12, 2026
Closed $32.88 (+0.4%) on Oct 13, 2026
Late-Breaking EADV 2026 Data Support Use of DecisionDx®-Melanoma in SLNB Decision-Making and Risk-Aligned Post Surgical Management
Sep 30, 2026
Closed $35.26 (-0.8%) on Oct 1, 2026
New Study Shows That TissueCypher® Changed Management at an Expert Surgery Center in 90% of Patients With Non-Dysplastic Barrett's Esophagus
Sep 28, 2026
Closed $35.93 (+0.3%) on Sep 28, 2026
New Study Highlights Clinical Need for Molecular Guidance in Atopic Dermatitis Treatment Selection, Reinforcing the Value of AdvanceAD-Tx™
Sep 24, 2026
Closed $35.81 (+1.8%) on Sep 25, 2026
Castle Biosciences to Open New Laboratory Facility in Scottsdale
Sep 22, 2026
Closed $34.85 (-0.4%) on Sep 22, 2026
New Decision Modeling Study Demonstrates TissueCypher® Significantly Improves Risk-Aligned Management for Patients with Barrett's Esophagus
Sep 15, 2026
Closed $35.50 (+6.2%) on Sep 15, 2026
JAAD Publication Shows Improved Performance of DecisionDx®-SCC
Sep 9, 2026
Closed $32.32 (0.0%) on Sep 10, 2026
Castle Biosciences: Approved for Dual Listing on Nasdaq Texas
Aug 17, 2026
Closed $29.95 (+1.1%) on Aug 17, 2026
Decks
Q2 2026 Earnings Presentation
Earnings · 34 slides · Jul 30, 2026
Q1 2026 Earnings Presentation
Earnings · 33 slides · May 6, 2026
Technical Presentation (March 2026)
Technical · 29 slides · Mar 23, 2026
Q4 2025 Earnings Presentation
Earnings · 32 slides · Feb 26, 2026
Castle Biosciences, Inc. on 6ix
- Sector
- Health care
- Industry
- Diagnostics & research services
- News releases
- 45 in the last 12 months · 311 in all · newest Oct 28, 2026 · oldest 2019
- Calls
- 23 calls with a replay · 23 with a transcript · latest Jul 30, 2026
- Decks
- 55 decks · latest Jul 30, 2026
Where Castle Biosciences, Inc. is listed
| Listing | Exchange | Country | Currency |
|---|---|---|---|
| NASDAQ:CSTL · Home listing | NASDAQ | United States | USD |
| Frankfurt:086 | Frankfurt | Germany | EUR |
| BOATS:CSTL · This page | BOATS | United States | USD |
| Tradegate:086 | Tradegate | Germany | EUR |
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