CSTL Stock Snapshot Price, market cap, P/E, EPS, ROE, debt/equity, 52-week range

03
Price $35.56
Market Cap (MRQ) $1.08B
P/E (TTM) -55.6
EPS (TTM) $-0.64
Revenue (TTM) $357M
ROE (TTM) -4.2%
Debt/Equity (MRQ) 0.0
52W Range $18–$44

CSTL Stock Price Chart Daily OHLCV with technical indicators — pan, zoom, and customize your view

04
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10-Year Performance Revenue, net income, margins and EPS trends

06
Revenue$344M
2018-12-31 → 2025-12-31
EPS$-0.83
2018-12-31 → 2025-12-31
Free Cash Flow$28M
2019-12-31 → 2025-12-31
Net margin-5.4%
2019-12-31 → 2025-12-31
Valuation & Ratios 07–12

Valuation P/E, P/S, P/B, EV/EBITDA ratios — is the stock expensive or cheap?

Metric 5Y trend CSTL 5Y avg Peer Median Verdict
P/E (TTM) -55.65Y avg ≈-11.5 ≈-11.5 · ·
P/S (TTM) 3.05Y avg ≈4.9 ≈4.9 1.5 Overvalued
P/B (MRQ) 2.35Y avg ≈2.0 ≈2.0 1.7 Undervalued
EV / EBITDA (TTM) -50.1 · · ·
Price / FCF (TTM) -2218.65Y avg ≈-6.2 ≈-6.2 · ·
Price / Cash Flow (TTM) 25.45Y avg ≈-29.6 ≈-29.6 17.9 Fair value
EV / Revenue (TTM) 2.3 · · ·
EV / FCF (TTM) -1693.6 · · ·
Price / Tangible Book (MRQ) 2.85Y avg ≈2.6 ≈2.6 · ·

Peer median is calculated on a standardized basis per metric and may not always match the TTM/MRQ basis shown for this stock.

value · ≈ 5Y avg · industry median · verdict relative to median

Earnings History EPS actual vs estimate, surprise %, beat rate, next earnings date

14
Avg Surprise 34.4%
Next Report Nov 02, 2026
PeriodReportEPS ActualEPS EstSurprise
June 30, 2026 Aug 3, 2026 $-0.07 $-0.41 83.1%
March 31, 2026 May 11, 2026 $-0.49 $-0.50 2.0%
Dec. 31, 2025 $-0.08 $-0.29 72.6%
Sept. 30, 2025 $-0.02 $-0.53 96.2%
June 30, 2025 $0.15 $-0.53 128.1%
March 31, 2025 $-0.20 $-0.07 -175.9%

Full Fundamentals All metrics by year — income statement, balance sheet, cash flow

15
Income Statement 17
Metric Trend 20252024202320222021202020192018
Revenue $344M$332M$220M$137M$94M$63M$52M$23M
Cost of Revenue $71M$60M$45M$32M$16M$10M$7M$5M
Gross Profit ·····$53M$45M$17M
R&D Expense $52M$52M$54M$45M$30M$13M$7M$5M
SG&A Expense $229M$200M$180M$143M$87M$48M$30M$16M
Operating Expenses ······$37M$21M
Operating Income $-43M$9M$-68M$-73M$-40M$-7M$7M$-4M
Interest Expense ··$11.0K$17.0K$1.0K$3M$5M$2M
Interest Income $12M$13M$11M$4M$68.0K$373.0K$312.0K$24.0K
Other Non-op $144.0K$0$0··$0$-3M$-272.0K
Income Tax $-5M$3M$101.0K$-2M$-9M$84.0K$72.0K$9.0K
Net Income $-24M$18M$-57M$-67M$-31M$-10M$5M$-6M
EPS (Basic) $-0.83$0.66$-2.14$-2.58$-1.24$-0.54$0.35$-5.33
EPS (Diluted) $-0.83$0.62$-2.14$-2.58$-1.24$-0.54$-0.21$-5.33
Shares (Basic) 28,986,00027,776,00026,802,00026,054,00025,137,00018,929,0008,584,0001,906,000
Shares (Diluted) 28,986,00029,255,00026,802,00026,054,00025,137,00018,929,0008,658,0001,906,000
EBITDA $-2M$25M$-56M$-62M$-37M$-7M$7M·
Balance Sheet 28
Metric Trend 20252024202320222021202020192018
Cash & Equivalents $117M$120M$99M$123M$330M$410M$99M$4M
Short-term Investments $183M$173M$144M·····
Receivables $43M$51M$38M$23M$17M$13M$15M$12M
Inventory $10M$8M$8M$4M$2M$2M$1M$882.0K
Prepaid Expense $8M$8M$6M$6M$5M$5M$2M$675.0K
Current Assets $361M$360M$296M$292M$354M$430M$117M$18M
PP&E (Net) ···$14M$10M$7M$2M$2M
PP&E (Gross) ·····$9M$3M$2M
Accum. Depreciation ·····$2M$1M$909.0K
Goodwill $11M$11M$11M$11M$0···
Intangibles $89M$96M$107M$116M$89M$0$0$4.0K
Other Non-current Assets $4M$1M$1M$1M$2M$2M$135.0K$214.0K
Total Assets $579M$531M$453M$447M$463M$439M$120M$22M
Accounts Payable $19M$7M$10M$5M$3M$2M$2M$1M
Short-term Debt ·······$0
Current Liabilities $69M$49M$48M$36M$25M$21M$15M$7M
Capital Leases $25M$14M$14M$12M$7M$0··
Deferred Tax $2M$2M$206.0K$428.0K$635.0K$0··
Other Non-current Liabilities ··$25.0K$90.0K$124.0K$1M··
Total Liabilities $108M$75M$62M$48M$51M$24M$35M$32M
Long-term Debt $10M$10M$0··$0$27M$24M
Total Debt $10M$10M···$0$25M·
Paid-in Capital $695M$656M$609M$560M$505M$478M$137M$921.0K
Retained Earnings $-224M$-200M$-218M$-161M$-94M$-62M$-52M$-57M
AOCI $267.0K$230.0K$136.0K$-381.0K$0···
Stockholders' Equity $471M$456M$391M$399M$412M$416M$85M$-57M
Liabilities + Equity $579M$531M$453M$447M$463M$439M$120M$22M
Shares Outstanding 29,686,31428,483,19527,410,53226,553,68125,378,52024,812,48717,130,9071,916,224
Cash Flow 14
Metric Trend 20252024202320222021202020192018
D&A $41M$16M$12M$11M$3M$472.0K··
Stock-based Comp $46M$50M$51M$36M$22M$8M$1M$294.0K
Deferred Tax $-6M$1M$-223.0K$-2M$-9M$0$0$0
Amort. of Intangibles $35M$11M$9M$8M$2M$0$4.0K$36.0K
Other Non-cash $8M$-21M$-11M$-20M$-4M···
Operating Cash Flow $64M$65M$-6M$-42M$-19M$10M$7M$-12M
CapEx $36M$28M$14M$6M$3M$5M$937.0K$277.0K
Investing Cash Flow $-60M$-50M$-16M$-167M$-67M$-5M$-937.0K$-277.0K
Stock Issued ····$0$330M$66M·
Net Stock Activity ····$0$330M··
Financing Cash Flow $-7M$6M$-2M$2M$5M$306M$88M$16M
Net Change in Cash $-3M$21M$-24M$-207M$-80M$311M$94M$3M
Taxes Paid $2M$3M$198.0K$120.0K$16.0K$102.0K$-150.0K$160.0K
Free Cash Flow $28M$37M$-19M$-47M$-22M$5M$6M·
Profitability 6
Metric Trend 20252024202320222021202020192018
Gross Margin ·····84.5%85.9%·
Operating Margin -12.4%2.6%-30.9%-53.2%-42.6%-10.4%14.1%·
Net Margin -7.0%5.5%-26.2%-49.0%-33.3%-16.4%10.2%·
EBITDA Margin -0.59%7.4%-25.3%-45.5%-39.0%-10.4%14.1%·
ROA -4.3%3.7%-12.8%-14.8%-6.9%-3.7%7.4%·
ROE -5.2%4.1%-14.8%-16.6%-7.6%-3.5%6.3%·
Liquidity & Solvency 5
Metric Trend 20252024202320222021202020192018
Current Ratio 5.37.36.28.114.220.67.6·
Quick Ratio 5.07.02.94.113.920.27.4·
Debt / Equity 0.00.0···0.00.3·
LT Debt / Equity 0.00.0···0.00.2·
Interest Coverage ··-6179.7-4285.6-40079.0-2.51.6·
Efficiency 3
Metric Trend 20252024202320222021202020192018
Asset Turnover 0.60.70.50.30.20.20.7·
Inventory Turnover 7.77.57.510.77.55.66.9·
Receivables Turnover 7.37.47.16.76.34.63.9·
Per Share 7
Metric Trend 20252024202320222021202020192018
Book Value / Share $15.86$16.00$14.27$15.03$16.22$16.75$4.97·
Revenue / Share $11.88$11.35$8.20$5.26$3.74$3.31$5.99·
Cash Flow / Share $2.22$2.22$-0.21$-1.60$-0.76$0.52$0.81·
Cash / Share $3.93$4.20$3.61$4.63$12.99$16.52$5.77·
Dividend / Share $0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00
Dividend Paid / Share $0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00
EPS (TTM) $-0.83$0.62$-2.14$-2.58$-1.24$-0.54$-0.21·
Growth Rates 3
Metric Trend 20252024202320222021202020192018
Revenue YoY 3.7%51.1%60.4%45.6%50.2%···
Revenue CAGR 3Y 35.9%52.2%51.9%·····
Revenue CAGR 5Y 40.6%·······
Valuation (TTM) 14
Metric Trend 20252024202320222021202020192018
Revenue TTM $344M$332M$220M$137M$94M$63M$52M·
Net Income TTM $-24M$18M$-57M$-67M$-31M$-10M$5M·
Market Cap $1.15B$759M$592M$625M$1.09B$1.67B$589M·
Enterprise Value $865M$476M···$1.26B$515M·
P/E -46.943.0-10.1-9.1-34.6-124.4-163.7·
P/S 3.42.32.74.611.626.611.4·
P/B 2.51.71.51.62.64.06.9·
P / Tangible Book 3.12.22.22.33.44.0··
P / Cash Flow 17.911.7-105.1-15.0-57.3168.983.9·
P / FCF 40.820.8-30.7-13.2-48.4325.896.9·
EV / EBITDA -424.419.3···-192.070.3·
EV / FCF 30.513.0···245.784.7·
EV / Revenue 2.51.4···20.19.9·
Earnings Yield -2.1%2.3%-9.9%-11.0%-2.9%-0.80%-0.61%·

Most recent period on the left · null values shown as ·

Financial Statements Income statement, balance sheet, cash flow — annual, last 5 years

16
Metric 2025-12-312024-12-312023-12-312022-12-312021-12-31
Revenue $344M $332M $220M $137M $94M
Operating Margin % -12.4% 2.6% -30.9% -53.2% -42.6%
Net Income $-24M $18M $-57M $-67M $-31M
Diluted EPS $-0.83 $0.62 $-2.14 $-2.58 $-1.24

Institutional owners (13F) 187 filers · $721.1M total · As of Sept. 30, 2026

17

Institutions that report holding this stock in their quarterly SEC Form 13F. Long positions only; a single filer may appear twice for separate option legs. Large offsetting put/call legs typically reflect market-making or hedged inventory, not directional conviction.

Holders 187
Value held $721.1M
New positions 20
Exited positions 30
Institutional activity — Q2 2026 vs prior quarter
New positions Exited positions Increased Decreased Net shares change
20 (-15 vs prior Q) 30 (-3 vs prior Q) 79 (+7 vs prior Q) 53 (-7 vs prior Q) -627K

Compared to Q1 2026. SEC Form 13F filings are due within 45 days of quarter-end plus a short buffer for late filers — quarters still inside that window are skipped in favor of the most recent fully-reported pair.

Institution Value Shares % of tracked 13F Type
VANGUARD GROUP INC $85,573,349 2,199,829 11.87% Shares
BlackRock, Inc. $78,513,319 3,291,963 10.89% Shares
RTW INVESTMENTS, LP $66,263,290 2,778,335 9.19% Shares
PRINCIPAL FINANCIAL GROUP INC $41,180,555 1,726,648 5.71% Shares
VANGUARD CAPITAL MANAGEMENT LLC $29,251,953 1,226,497 4.06% Shares
Allianz Asset Management GmbH $20,970,303 879,258 2.91% Shares
VANGUARD PORTFOLIO MANAGEMENT LLC $20,052,722 840,785 2.78% Shares
SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC $19,673,197 824,872 2.73% Shares
STATE STREET CORP $19,630,772 822,079 2.72% Shares
GEODE CAPITAL MANAGEMENT, LLC $18,986,390 795,912 2.63% Shares
MACKENZIE FINANCIAL CORP $18,925,142 793,507 2.62% Shares
DIMENSIONAL FUND ADVISORS LP $18,868,635 791,085 2.62% Shares
Jefferies Financial Group Inc. $15,440,275 647,391 2.14% Shares
Qube Research & Technologies Ltd $14,054,805 589,300 1.95% Shares
AIGH Capital Management LLC $13,000,659 545,101 1.80% Shares
WASATCH ADVISORS LP $11,171,134 455,036 1.55% Shares
RENAISSANCE TECHNOLOGIES LLC $8,853,120 371,200 1.23% Shares
GOLDMAN SACHS GROUP INC $8,547,768 358,397 1.19% Shares
Point72 Asset Management, L.P. $8,522,010 357,317 1.18% Shares
KENNEDY CAPITAL MANAGEMENT LLC $8,308,648 348,371 1.15% Shares
Connor, Clark & Lunn Investment Management Ltd. $7,911,689 331,727 1.10% Shares
MORGAN STANLEY $7,862,987 329,684 1.09% Shares
Portolan Capital Management, LLC $7,842,309 328,818 1.09% Shares
PANAGORA ASSET MANAGEMENT INC $7,179,804 301,040 1.00% Shares
Allspring Global Investments Holdings, LLC $6,975,410 292,470 0.97% Shares
NORTHERN TRUST CORP $6,801,019 285,158 0.94% Shares
CITADEL ADVISORS LLC $6,328,669 265,353 0.88% Shares
KORNITZER CAPITAL MANAGEMENT INC /KS $6,302,005 264,235 0.87% Shares
SILVERCREST ASSET MANAGEMENT GROUP LLC $6,107,866 256,095 0.85% Shares
CHARLES SCHWAB INVESTMENT MANAGEMENT INC $6,070,660 254,535 0.84% Shares
Advisors Capital Management, LLC $5,681,165 238,204 0.79% Shares
NEW YORK STATE COMMON RETIREMENT FUND $5,598,692 234,746 0.78% Shares
PALISADE CAPITAL MANAGEMENT, LP $5,531,554 231,931 0.77% Shares
Nuveen, LLC $5,526,666 231,726 0.77% Shares
BRIDGEWAY CAPITAL MANAGEMENT, LLC $5,278,911 221,338 0.73% Shares
Trexquant Investment LP $4,915,747 206,111 0.68% Shares
MILLENNIUM MANAGEMENT LLC $4,898,051 205,369 0.68% Shares
VANGUARD FIDUCIARY TRUST CO $4,710,232 197,494 0.65% Shares
AQR CAPITAL MANAGEMENT LLC $3,972,623 166,567 0.55% Shares
FIRST TRUST ADVISORS LP $3,459,776 145,064 0.48% Shares
Parkman Healthcare Partners LLC $3,453,265 144,791 0.48% Shares
Empowered Funds, LLC $3,394,761 142,338 0.47% Shares
D. E. Shaw & Co., Inc. $2,690,018 112,789 0.37% Shares
Man Group plc $2,593,950 108,761 0.36% Shares
TWO SIGMA INVESTMENTS, LP $2,393,920 100,374 0.33% Shares
BANK OF AMERICA CORP /DE/ $2,355,069 98,745 0.33% Shares
Bank of New York Mellon Corp $2,337,724 98,018 0.32% Shares
FRANKLIN RESOURCES INC $2,330,932 97,733 0.32% Shares
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $2,211,754 92,736 0.31% Shares
UBS Group AG $2,131,427 89,368 0.30% Shares

Show all 187 institutional owners →

Activists & 5%+ owners 1 position

18

Investors who filed SEC Schedule 13D — beneficial ownership above 5% with an intent to influence the issuer (activist stakes, board campaigns, M&A). Each row shows the most recent known state of that filer's position.

Filer Filed Stake Status Purpose Filing
Sofinnova HealthQuest Partners, L.P. (“HealthQuest”), HealthQuest Venture Management, L.L.C. (“HealthQuest Management”), Dr. Garheng Kong (“Kong”) ×5 filings Oct. 9, 2020 · Initial filing · SEC

Purpose is an automated classification of the filer's own stated purpose (SEC Item 4) — not investment advice. "—" means no clear purpose was stated or the text could not be classified.

Company insiders 17 insiders · 6 officers · 12 directors

19
Insider Role Last activity Shares owned Buys 12m Sells 12m Net 12m
Frank Stokes Chief Financial Officer Aug. 14, 2026 S 35,177 0 6 $-1,458,878
Kristen M Oelschlager Chief Operating Officer Sept. 1, 2026 M 13,356 0 15 $-3,577,426
Tobin W Juvenal Chief Commercial Officer Sept. 30, 2026 S 52,007 0 19 $-2,723,752
Derek J Maetzold Pres. & Chief Exec. Officer Sept. 21, 2026 M 9,550 0 170 $-10,693,482
Bernhard E. Spiess Chief Business Officer Dec. 10, 2021 M 14,696 0 0 $0
Federico A. Monzon Chief Medical Officer May 22, 2020 M 31,459 0 0 $0
Rodney Cotton Director May 28, 2026 A 32,998 0 0 $0
Kim Caple Director May 28, 2026 A 36,121 0 0 $0
Ellen Goldberg Director May 28, 2026 A 40,921 0 0 $0
Miles Harrison Director May 28, 2026 A 35,631 0 0 $0
Tiffany Olson Director May 28, 2026 A 39,573 0 0 $0
Bradley G Cole Director May 28, 2026 A 32,976 0 2 $-210,727
Daniel Bradbury Director May 28, 2026 A 22,340 0 0 $0
Mara G. Aspinall Director May 23, 2024 M 44,139 0 0 $0
KABAKOFF DAVID S Director June 17, 2021 S 503,577 0 0 $0
Joseph C. Cook III Director March 18, 2021 M 124,407 0 0 $0
Bonnie H Anderson Director July 16, 2020 S 21,723 0 0 $0

Insiders from SEC Form 3/4/5 filings; net = open-market P/S only

ETF ownership Held by 38 ETFs

20

Weight reflects direct equity holdings (N-PORT) only; leveraged or derivative-based funds may hold additional swap exposure not shown.

Fund Weight Units As of Source
HAPS · Harbor ETF Trust 0.52% 31,765 NS July 31, 2026 N-PORT
IWC · iShares Trust 0.23% 101,652 SH Sept. 11, 2026 Daily
ROSC · Lattice Strategies Trust 0.22% 4,906 NS July 31, 2026 N-PORT
IHF · iShares Trust 0.14% 58,276 SH Sept. 11, 2026 Daily
ESML · iShares Trust 0.08% 70,316 SH Sept. 11, 2026 Daily
JPSE · J.P. Morgan Exchange-Traded Fund Tr… 0.07% 15,720 NS July 31, 2026 N-PORT
IBBQ · Invesco Exchange-Traded Fund Trust … 0.07% 2,172 SH Oct. 2, 2026 Daily
IBB · iShares Trust 0.07% 226,120 SH Sept. 11, 2026 Daily
NUSC · Nushares ETF Trust 0.06% 25,475 NS July 31, 2026 N-PORT
VTWV · VANGUARD SCOTTSDALE FUNDS 0.05% 26,084 SH Aug. 19, 2026 Daily
PRFZ · Invesco Exchange-Traded Fund Trust 0.05% 36,652 SH Oct. 2, 2026 Daily
IWM · iShares Trust 0.03% 767,126 SH Sept. 11, 2026 Daily
RSSL · Global X Funds 0.03% 14,302 NS July 31, 2026 N-PORT
VTWO · VANGUARD SCOTTSDALE FUNDS 0.02% 172,326 SH Aug. 19, 2026 Daily
TEXN · iShares Trust 0.02% 97 SH Sept. 11, 2026 Daily
DFAS · Dimensional ETF Trust 0.02% 87,066 NS July 31, 2026 N-PORT
OMFS · Invesco Exchange-Traded Self-Indexe… 0.01% 933 SH Oct. 2, 2026 Daily
FHLC · FIDELITY COVINGTON TRUST 0.01% 12,441 NS July 31, 2026 N-PORT
WSML · iShares Trust 0.01% 2,193 SH Sept. 11, 2026 Daily
VXF · VANGUARD INDEX FUNDS 0.01% 347,202 SH Aug. 19, 2026 Daily
VHT · VANGUARD WORLD FUND 0.01% 80,555 SH Aug. 19, 2026 Daily
DFSV · Dimensional ETF Trust 0.01% 24,699 NS July 31, 2026 N-PORT
DXUV · Dimensional ETF Trust 0.01% 1,345 NS July 31, 2026 N-PORT
DFAC · Dimensional ETF Trust 0.00% 71,710 NS July 31, 2026 N-PORT
DFSU · Dimensional ETF Trust 0.00% 2,610 NS July 31, 2026 N-PORT
DCOR · Dimensional ETF Trust 0.00% 3,672 NS July 31, 2026 N-PORT
DFAU · Dimensional ETF Trust 0.00% 7,521 NS July 31, 2026 N-PORT
DFUS · Dimensional ETF Trust 0.00% 12,934 NS July 31, 2026 N-PORT
ITOT · iShares Trust 0.00% 34,931 SH Sept. 11, 2026 Daily
TILT · FlexShares Trust 0.00% 948 NS July 31, 2026 N-PORT
DFUV · Dimensional ETF Trust 0.00% 5,356 NS July 31, 2026 N-PORT
IWV · iShares Trust 0.00% 5,526 SH Sept. 3, 2026 Daily
VTI · VANGUARD INDEX FUNDS 0.00% 852,704 SH Aug. 19, 2026 Daily
VTHR · VANGUARD SCOTTSDALE FUNDS 0.00% 2,166 SH Aug. 19, 2026 Daily
IWN · iShares Trust · 281,338 SH Sept. 11, 2026 Daily
SVAL · iShares Trust · 24,820 SH Sept. 3, 2026 Daily
ISCB · iShares Trust · 1,252 SH Sept. 11, 2026 Daily
ISCV · iShares Trust · 5,691 SH Sept. 11, 2026 Daily

CSTL Analyst Consensus Bullish and bearish analyst opinions, 12-month price target, upside

21
rating · 15 analysts BUY
Median target $45.00 +26.5%
7 46.7% Strong Buy
7 46.7% Buy
1 6.7% Hold
0 0.0% Sell
0 0.0% Strong Sell

12-Month Price Target

9 analysts · 2026-09-28

Mean target $45.11 +26.9%

Now Current price $35.56
Low$35.00 Mean$45.11 High$57.00

Peer comparison (GICS sub-industry) Key metrics vs sector peers

22

FY basis, prices as of each company's last fiscal year-end close.

Ticker Market Cap P/E Rev YoY Net Margin ROE Gross Margin
CSTL $1.15B -46.9 3.7% -7.0% -5.2% ·
AMN $606M -6.4 -8.5% -3.5% -15.3% 28.3%
PNTG $975M 33.5 36.3% 3.1% 8.4% ·
OMDA $922M -45.1 53.2% -4.9% -5.8% 65.7%
INNV $1.61B -592.5 15.9% -0.26% -1.1% 23.0%
OPK · -4.2 -14.9% -37.2% -17.6% 33.9%
LMRI · · · · · ·
FLGT $816M -84.7 13.8% -18.8% -5.4% 40.6%
CVS $100.87B 57.1 7.8% 0.44% 2.4% ·

My Metrics Your personal watchlist — selected rows from Full Fundamentals

26

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Source: SEC 10-Q filed Jul 30, 2026