Insiders sold $1.5M in the last 30 days, all through pre-planned sales
Institutions cut 1% from their holdings in the quarter ending June 2026 (100 bought, 86 sold)
Facts from SEC filings, not a recommendation.
What the price means
Price as of Oct 26
$33.26+0.2% that day
Company value
$1.0B
Share price times all shares
Price vs sales
2.8x
No profit over the last year, so this compares value with sales instead
Cash vs value
6%
Cash as a share of company value
Debt vs value
1%
Debt as a share of company value
From CSTL's last IEX trade and its SEC filings (profits and sales over the last four quarters). A starting point for research, not a verdict.
The business over time
Last 12 quarters, from SEC filings
Sales, Jun '26
$103.5M+20% vs a year earlier
Sep '23Tap a barJun '26
Last 12 months: $357.3M, up 3.2% from the 12 months before. Over 5 years, sales grew about 41% a year.
What the price assumes
Your guesses, our math
Move the sliders to your own view of CSTL. Starting points are the company's recent numbers (it isn't profitable yet, so the margin starts at a 10% guess).
Sales in 5 years$414M
Profit in 5 years$41M
Price these guesses point to$16.72-50% vs $33.26 todayAbout -13% a year, before dividends
What today's price needs: with a 10% margin and a 15x P/E, sales would have to grow about 18% a year for 5 years just to match today's price.
Simple math on your guesses, not a forecast or a price target. Real results depend on many things these sliders leave out.
The checklist Warren Buffett-style investors use. Annual numbers for 2025.
2/6Weak
MissReturn on equity 15%+Earns a lot on the money owners have in the business.-5.2%
PassDebt under half of equityNot relying on borrowed money.0.02x equity
MissNet margin 10%+Keeps at least 10 cents of profit from each dollar of sales.-7.0%
MissProfitable every yearSteady profits, not one good year.2 of 8 years
PassFree cash flow positiveBrings in more cash than it spends to run and grow.$28.3M
MissShare count not growingNot diluting owners. Falling means buybacks.+11.3% in 3 years
Revenue
$344.2M
+3.7% vs prior year
5-year growth
+40.6%/yr
revenue, per year
Total debt
$10.1M
0.02x equity
Current ratio
5.26x
short-term assets / bills due
From annual reports filed with the SEC. Not in this company's SEC data, so not scored: gross margin 40%+. A checklist is a starting point for research, not a verdict.
Latest quarter
Quarter ended Jun 30, 2026
Reported Jul 30
Revenue
$103.5M
+20.1% YoY
EPS
-$0.07
vs $0.15
Op. margin
-3.0%
+1.9 pts
Gross margin
77.1%
-2.4 pts
Free cash flow
$6.6M
Share count
+2.9%
vs a year ago
Insider rating
Last 90 days
45Mixed
Pre-planned sales of $1.5M (weaker signal)
50 is neutral. Buying by more insiders, top executives and bigger stakes raises it. Selling lowers it; pre-planned sales count less.
Weekly insider trend
13 weeks agoBoughtSoldThis week
Filing buzz
Last 7 days vs normal
26/ 100
This week
1
Normal week
2.5
vs normal
0.4x
SEC filings of any kind. 50 means a normal week.
Institutional ownership
■Steady-1.0%
Institutions cut 1.0% from their holdings. 100 bought, 86 sold.
Shares held by institutions27.3M
Sep '24Jun '26
Safety check
From SEC filings
Share count growthYearly rate, last 3 years
+4.4%
Cash runwayAt last year's cash burn
Cash flow positive
Debt to equityLatest balance sheet: debt compared with what owners have
0.0x · $10.1M debt
Shares outstandingLatest reported
31M
Why low risk
Losing money
Earnings reports
Last 12
Next reportIn 5 days (est.)Estimated from the same quarter last year
Results filedJul 30
Results filedMay 6
Results filedFeb 26
Results filedJan 13
Results filedNov 3, 2025
Flags and big holders
Offerings 6 months, flags 12 months, holders 90 days
No offerings, red flags or new big holders. Clean record.