CASTLE BIOSCIENCES INC

CSTL

CASTLE BIOSCIENCES INC

CSTL

Insider Sentiment (TTM):

Last Purchase:-Last Sale:2026-06-16Shares Purchased (TTM):0Shares Sold (TTM):261,564

Institutional Sentiment:

As of:2026-03-31Institutional Shares Owned:26,375,659Shares Outstanding:29,889,000Institutional Ownership Pct.:88.25%

Earnings Market Reaction:

Filing Date:2026-07-30Price on Filing Date:N/APrevious Close:N/A% Change:N/A

Financial Statements

10‑Q10‑K

Values in Millions ($)	2026-06-30	2026-03-31	2025-12-31	2025-09-30	2025-06-30	2025-03-31	2024-12-31	2024-09-30	2024-06-30	2024-03-31	2023-12-31	2023-09-30
Assets
Assets Current
Cash And Cash Equivalents At Carrying Value	62	64	117	86	82	90	120	95	86	83	99	91
Available For Sale Securities Debt Securities Curr…	-	-	-	-	-	-	-	185	174	156	144	139
Marketable Securities Current	205	198	183	202	194	185	173	-	-	-	144	-
Accounts Receivable Net Current	48	42	43	49	52	56	51	50	46	43	38	37
Inventory Net	11	10	10	9	8	7	8	7	8	8	8	6
Prepaid Expense And Other Assets Current	15	14	8	12	12	11	8	8	7	6	6	7
Assets Current	341	329	361	358	349	349	360	345	320	296	296	280
Marketable Securities Noncurrent	-	-	-	-	-	6	-	-	-	-	-	-
Accounts Receivable Net Noncurrent	2	2	2	2	1	1	1	1	1	1	1	1
Property Plant And Equipment And Finance Lease Rig…	105	101	97	85	74	55	51	44	39	33	25	22
Operating Lease Right Of Use Asset	14	14	15	15	16	11	12	12	12	12	12	12
Intangible Assets Net Including Goodwill	95	97	100	102	104	78	106	111	113	115	117	120
Other Assets Noncurrent	4	4	4	1	1	1	1	2	3	2	1	2
Assets	561	548	579	563	545	502	531	515	487	459	453	436
Liabilities And Stockhold…
Liabilities Current
Accounts Payable Current	10	15	19	12	13	9	7	7	10	9	10	7
Employee Related Liabilities Current	27	19	38	32	25	18	33	28	21	15	29	22
Asset Acquisition Contingent Consideration Liabili…	2	1	1	1	1	-	0	-	-	-	-	-
Operating Lease Liability Current	1	1	1	1	2	1	2	2	1	1	1	1
Long Term Debt Current	3	2	0	0	2	1	0	-	-	-	0	-
Other Accrued Liabilities Current	14	11	9	9	8	8	8	8	7	7	7	6
Liabilities Current	57	49	69	55	51	37	49	44	39	32	48	36
Long Term Debt Noncurrent	7	8	10	10	8	9	10	10	10	10	0	-
Asset Acquisition Contingent Consideration Liabili…	0	2	2	2	2	-	0	-	-	-	-	-
Operating Lease Liability Noncurrent	25	25	25	25	25	14	14	15	14	14	14	13
Finance Lease Liability Noncurrent	0	0	0	0	0	0	0	0	0	-	0	-
Deferred Income Tax Liabilities Net	2	2	2	3	3	1	2	4	0	0	0	0
Other Liabilities Noncurrent	-	-	-	-	-	-	-	-	-	0	0	0
Liabilities	91	86	108	96	89	61	75	74	63	56	62	50
Stockholders Equity
Preferred Stock Value Outstanding	0	0	0	0	0	0	0	0	0	0	0	0
Common Stock Value Outstanding	0	0	0	0	0	0	0	0	0	0	0	0
Additional Paid In Capital	711	700	695	689	677	666	656	650	636	623	609	602
Retained Earnings Accumulated Deficit	-241	-239	-224	-222	-221	-226	-200	-210	-212	-221	-218	-216
Accumulated Other Comprehensive Income Loss Net Of…	-0	-0	0	0	0	0	0	0	-0	-0	0	-0
Stockholders Equity	470	461	471	467	455	440	456	441	424	402	391	386
Liabilities And Stockholders Equity	561	548	579	563	545	502	531	515	487	459	453	436
Preferred Stock Par Or Stated Value Per Share	0.001	0.001	0.001	0.001	0.001	0.001	0.001	0.001	0.001	0.001	0.001	0.001
Preferred Stock Shares Authorized	10	10	10	10	10	10	10	10	10	10	10	10
Preferred Stock Shares Issued	0	0	0	0	0	0	0	0	0	0	0	0
Preferred Stock Shares Outstanding	0	0	0	0	0	0	0	0	0	0	0	0
Common Stock Par Or Stated Value Per Share	0.001	0.001	0.001	0.001	0.001	0.001	0.001	0.001	0.001	0.001	0.001	0.001
Common Stock Shares Authorized	200	200	200	200	200	200	200	200	200	200	200	200
Common Stock Shares Issued	31	30	30	29	29	29	28	28	28	28	27	27
Shares Outstanding	31	30	30	29	29	29	28	28	28	28	27	27

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10‑Q10‑K

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Earnings Market Reaction

10‑Q10‑K

Fiscal Year	Q1 1 Month	Q1 2 Month	Q1 3 Month	Q2 1 Month	Q2 2 Month	Q2 3 Month	Q3 1 Month	Q3 2 Month	Q3 3 Month	Q4 1 Month	Q4 2 Month	Q4 3 Month
2026	-14.83%	-1.82%	-0.26%	-	-	-	-	-	-	-	-	-
2025	-14.83%	8.53%	-14.29%	56.72%	48.24%	59.99%	53.71%	51.58%	62.52%	-21.58%	-21.42%	-39.99%
2024	6.70%	-6.35%	-12.78%	35.79%	27.51%	43.57%	-9.99%	-20.24%	-21.40%	-18.83%	-14.91%	-33.74%
2023	-	-	-	10.96%	-1.61%	-23.76%	19.40%	29.91%	15.08%	-16.89%	-20.83%	-0.62%
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Performance and Valuation Metrics

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Metrics	2026-06-30	2026-03-31	2025-12-31	2025-09-30	2025-06-30	2025-03-31	2024-12-31	2024-09-30	2024-06-30	2024-03-31	2023-12-31	2023-09-30
Liquidity Ratios
Current Ratio	6.04	6.75	5.26	6.47	6.85	9.37	7.29	7.78	8.12	9.25	6.20	7.70
Quick Ratio	5.58	6.23	4.99	6.09	6.45	8.89	6.97	7.45	7.75	8.82	5.90	7.34
Working Capital	284.59M	280.14M	292.42M	302.26M	297.78M	312.11M	310.76M	300.48M	280.95M	263.82M	247.97M	243.30M
Leverage & Debt
Debt to Equity	0.19	0.19	0.23	0.20	0.20	0.14	0.17	0.17	0.15	0.14	0.16	0.13
Interest Coverage TTM	-85.62	-163.99	-497.79	-226.84	-69.64	-23.77	15.03	-2.13	-54.71	-1,996.48	-6,179.73	-6,550.08
Debt Ratio	0.16	0.16	0.19	0.17	0.16	0.12	0.14	0.14	0.13	0.12	0.14	0.12
Efficiency & Turnover
Asset Turnover TTM	0.65	0.65	0.62	0.64	0.67	0.72	0.67	0.66	0.63	0.57	0.49	0.43
Days Sales Outstanding TTM	51.41	52.95	50.15	52.99	51.81	52.08	49.20	51.06	49.05	51.26	51.30	56.88
Receivables Turnover TTM	7.10	6.89	7.28	6.89	7.05	7.01	7.42	7.15	7.44	7.12	7.12	6.42
Per Share Metrics
Diluted EPS TTM	-0.64	-0.43	-0.83	-0.42	-0.32	-0.18	0.62	0.21	-0.11	-1.12	-2.14	-2.81
Free Cash Flow Per Share TTM	-0.02	0.15	0.98	0.87	1.19	1.46	1.32	1.24	0.73	-0.23	-0.72	-1.56
Dividend Per Share TTM	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
Margin Metrics
Gross Profit Margin TTM	77.26%	77.88%	79.37%	79.94%	81.00%	81.94%	81.87%	81.90%	81.86%	80.58%	79.53%	78.08%
Operating Profit Margin TTM	-8.99%	-9.79%	-12.44%	-10.17%	-6.66%	-3.97%	2.61%	-0.33%	-5.48%	-16.72%	-30.93%	-44.35%
Net Profit Margin TTM	-5.43%	-3.78%	-7.02%	-3.56%	-2.73%	-1.46%	5.49%	1.95%	-1.08%	-12.28%	-26.15%	-39.32%
Growth Metrics
Net Revenue Growth (1Y)	3.18%	-2.06%	3.66%	10.15%	20.40%	38.43%	51.09%	62.43%	71.67%	64.71%	60.38%	55.17%
Net Income Growth (1Y)	105.10%	153.15%	-232.41%	-301.42%	205.45%	-83.54%	-131.75%	-108.05%	-96.51%	-57.06%	-14.41%	42.59%
EPS Growth (1Y)	95.08%	142.31%	-226.88%	-292.87%	192.06%	-84.19%	-130.64%	-107.76%	-96.63%	-58.43%	-16.79%	39.84%
Valuation Metrics
P/E TTM	-37.34	-57.18	-46.67	-54.10	-62.37	-112.99	40.57	130.70	-194.21	-19.77	-10.06	-6.00
P/B TTM	1.54	1.59	2.39	1.42	1.30	1.30	1.62	1.80	1.42	1.51	1.48	1.17
P/S TTM	2.03	2.16	3.28	1.93	1.71	1.65	2.23	2.55	2.09	2.43	2.63	2.36
Market Cap	725.02M	733.77M	1.13B	661.99M	590.42M	572.75M	740.23M	794.00M	601.85M	608.79M	578.39M	453.23M
Enterprise Value	672.98M	680.08M	1.02B	586.49M	518.23M	493.10M	630.54M	709.05M	526.29M	535.84M	479.57M	362.00M
Calculated Values
Free Cash Flow TTM	-489.00K	4.52M	28.33M	25.38M	34.54M	41.75M	36.54M	34.54M	20.13M	-6.46M	-19.25M	-41.83M
Net Debt	-52.04M	-53.70M	-106.67M	-75.51M	-72.19M	-79.66M	-109.69M	-84.94M	-75.56M	-72.95M	-98.82M	-91.22M
Per-Share and Margin
EPS TTM
Adjusted EPS TTM
Cash Flow Per Share TTM
Pretax Margin TTM
Stock Comp to Revenue TTM
Turnover Ratios and Averages
Average Assets
Average Equity
Average Inventory
Average Receivables
Average Accounts Payables
Inventory Turnover TTM
Payables Turnover TTM
Days Inventory Outstanding TTM
Days Payables Outstanding TTM
Cash Conversion Cycle TTM
Working Capital to Revenue
Deferred Revenue to Revenue
Growth Rates
Total Assets Growth (1Y)
Total Assets Growth (3Y)
Total Assets Growth (5Y)
Dividends Paid Growth (1Y)
Dividends Paid Growth (3Y)
Dividends Paid Growth (5Y)
EPS Growth (3Y)
EPS Growth (5Y)
Net Income Growth (3Y)
Net Income Growth (5Y)
Net Profit Margin Growth (1Y)
Net Profit Margin Growth (3Y)
Net Profit Margin Growth (5Y)
Net Revenue Growth (3Y)
Net Revenue Growth (5Y)
Deferred Revenue Growth (1Y)
Retained Earnings Growth (1Y)
Credit, Liquidity, Returns, Payout
Cash Ratio
Net Working Capital
Debt to EBITDA TTM
Net Debt to EBITDA TTM
Net Debt to Equity
Altman A
Altman B
Altman C
Altman D
Altman E
Altman Z-Score
ROA TTM
ROE TTM
NOPAT TTM
ROIC TTM
Effective Tax Rate TTM
Payout Ratio TTM
Dilution Ratio
Retained Earnings to Equity
Treasury Stock to Equity
Treasury Stock Change (1Y)
Accrued to Current Liabilities
NCAV
NCAV Per Share TTM
Valuation Ratios
P/CF TTM
Dividend Yield TTM
Free Cash Flow Yield TTM
EV EBITDA TTM
EV EBIT TTM
Stock Compensation TTM
Adjusted Net Income TTM
Billings TTM
Total Debt
Invested Capital

Insider Transactions

2026-06-16Sale

Owner: Oelschlager, Kristen M

Title: Chief Operating Officer

Shares: 8,587

Price/Share: $20.71

Value: $177,836.77

Shares Owned: 30,460

Relationship: Officer

Ownership: Direct

2026-06-15Sale

Owner: Maetzold, Derek J

Title: Pres. & Chief Exec. Officer

Shares: 550

Price/Share: $20.66

Value: $11,363.00

Shares Owned: 21,479

Relationship: Director,Officer

Ownership: Direct

2026-06-01Sale

Owner: Maetzold, Derek J

Title: Pres. & Chief Exec. Officer

Shares: 6,214

Price/Share: $20.86

Value: $129,624.04

Shares Owned: 21,479

Relationship: Director,Officer

Ownership: Direct

2026-05-21Sale

Owner: Maetzold, Derek J

Title: Pres. & Chief Exec. Officer

Shares: 420

Price/Share: $20.20

Value: $8,484.00

Shares Owned: 21,479

Relationship: Director,Officer

Ownership: Direct

2026-05-07Sale

Owner: Maetzold, Derek J

Title: Pres. & Chief Exec. Officer

Shares: 6,214

Price/Share: $22.34

Value: $138,820.76

Shares Owned: 21,479

Relationship: Director,Officer

Ownership: Direct

Filed Date	Owner	Relationship	Title	Ownership	Purchase/Sale	No. Shares	Price Per Share	Value	Shares Owned	Document Type
2026-06-16	Oelschlager, Kristen M	Officer	Chief Operating Officer	Direct	Sale	8,587	20.71	$177,836.77	30,460	4
2026-06-15	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	550	20.66	$11,363.00	21,479	4
2026-06-01	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	6,214	20.86	$129,624.04	21,479	4
2026-05-21	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	420	20.20	$8,484.00	21,479	4
2026-05-07	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	6,214	22.34	$138,820.76	21,479	4
2026-04-21	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	550	25.10	$13,805.00	21,479	4
2026-04-06	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	6,214	25.03	$155,536.42	21,479	4
2026-03-26	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	550	25.55	$14,052.50	21,479	4
2026-03-18	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	650	25.39	$16,503.50	21,479	4
2026-03-16	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	17,575	26.32	$462,574.00	40,779	4
2026-03-12	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	23,179	25.28	$585,965.12	71,558	4
2026-03-12	Juvenal, Tobin W	Officer	Chief Commercial Officer	Direct	Sale	20,863	25.24	$526,582.12	86,825	4
2026-03-05	Stokes, Frank	Officer	Chief Financial Officer	Direct	Sale	6,001	27.98	$167,907.98	60,085	4
2026-03-05	Cole, G Bradley	Director	-	Direct	Sale	7,403	28.48	$210,837.44	19,309	4
2026-03-03	Stokes, Frank	Officer	Chief Financial Officer	Direct	Sale	7,000	27.56	$192,920.00	52,483	4
2026-02-04	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	817	38.22	$31,225.74	83,698	4
2026-01-20	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	4,017	40.01	$160,720.17	87,715	4
2026-01-06	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,339	40.10	$53,693.90	29,513	4
2025-12-22	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	830	40.35	$33,490.50	33,530	4
2025-12-17	Oelschlager, Kristen M	Officer	Chief Operating Officer	Direct	Sale	14,888	39.31	$585,247.28	12,323	4
2025-12-17	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	509	40.04	$20,380.36	34,360	4
2025-12-16	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	12,821	38.55	$494,249.55	34,869	4
2025-12-11	Stokes, Frank	Officer	Chief Financial Officer	Direct	Sale	4,496	37.45	$168,375.20	50,326	4
2025-12-11	Juvenal, Tobin W	Officer	Chief Commercial Officer	Direct	Sale	13,200	37.48	$494,736.00	86,825	4
2025-12-04	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,339	40.03	$53,600.17	37,547	4
2025-12-02	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	2,678	39.23	$105,057.94	38,886	4
2025-11-26	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	4,258	40.09	$170,703.22	41,564	4
2025-11-25	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	5,115	40.05	$204,855.75	45,822	4
2025-11-20	Juvenal, Tobin W	Officer	Chief Commercial Officer	Direct	Sale	4,693	35.58	$166,976.94	84,595	4
2025-11-18	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	2,678	34.02	$91,105.56	50,937	4
2025-11-12	Juvenal, Tobin W	Officer	Chief Commercial Officer	Direct	Sale	200	35.40	$7,080.00	84,527	4/A
2025-11-11	Oelschlager, Kristen M	Officer	Chief Operating Officer	Direct	Sale	18,932	35.10	$664,513.20	12,323	4
2025-11-11	Stokes, Frank	Officer	Chief Financial Officer	Direct	Sale	5,388	35.08	$189,011.04	43,328	4
2025-11-05	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	2,678	31.85	$85,294.30	53,615	4
2025-10-31	Oelschlager, Kristen M	Officer	Chief Operating Officer	Direct	Sale	12,678	25.04	$317,457.12	27,569	4
2025-10-20	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,339	22.44	$30,047.16	62,988	4
2025-10-02	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,339	22.58	$30,234.62	64,327	4
2025-09-17	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,339	21.97	$29,417.83	65,666	4
2025-09-02	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,339	23.93	$32,042.27	67,005	4
2025-08-27	Oelschlager, Kristen M	Officer	Chief Operating Officer	Indirect	Sale	18,007	21.69	$390,571.83	100,937	4/A
2025-08-27	Oelschlager, Kristen M	Officer	Chief Operating Officer	Direct	Sale	12,677	22.02	$279,147.54	141,116	4
2025-08-15	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,339	20.04	$26,833.56	68,344	4
2025-08-13	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	43,019	19.50	$838,870.50	69,683	4
2025-06-27	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	4,944	20.30	$100,363.20	69,683	4
2025-04-21	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,236	21.52	$26,598.72	74,627	4
2025-04-09	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,023	20.22	$20,685.06	75,863	4
2025-03-26	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,236	20.30	$25,090.80	77,099	4
2025-03-10	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	2,130	19.52	$41,577.60	78,335	4
2025-03-04	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,247	20.86	$26,012.42	103,104	4
2025-02-20	Stokes, Frank	Officer	Chief Financial Officer	Direct	Sale	8,046	26.70	$214,828.20	35,319	4
2025-02-05	Bradbury, Daniel	Director	-	Indirect	Sale	7,867	28.17	$221,613.39	0	4
2025-01-13	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	986	28.55	$28,150.30	80,818	4
2025-01-07	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	243	30.14	$7,324.02	81,804	4
2025-01-06	Bradbury, Daniel	Director	-	Indirect	Sale	7,867	29.21	$229,795.07	1,425	4
2025-01-06	Juvenal, Tobin W	Officer	Chief Commercial Officer	Direct	Sale	2,230	30.00	$66,900.00	69,943	4
2024-12-17	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	9,364	28.54	$267,248.56	84,762	4
2024-12-16	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	11,059	28.83	$318,830.97	94,126	4
2024-12-05	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,972	31.35	$61,822.20	85,748	4
2024-12-03	Bradbury, Daniel	Director	-	Indirect	Sale	7,867	31.14	$244,978.38	2,850	4
2024-11-15	Stokes, Frank	Officer	Chief Financial Officer	Direct	Sale	6,923	30.14	$208,659.22	30,823	4
2024-11-12	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,972	34.15	$67,343.80	87,720	4
2024-11-05	Juvenal, Tobin W	Officer	Chief Commercial Officer	Direct	Sale	3,507	35.56	$124,708.92	54,178	4
2024-11-04	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,972	32.84	$64,760.48	89,692	4
2024-11-01	Bradbury, Daniel	Director	-	Indirect	Sale	7,867	34.72	$273,142.24	4,275	4
2024-11-01	Juvenal, Tobin W	Officer	Chief Commercial Officer	Direct	Sale	3,100	35.39	$109,709.00	54,178	4
2024-10-14	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,972	32.27	$63,636.44	91,664	4
2024-10-08	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	986	30.27	$29,846.22	93,636	4
2024-10-07	Bradbury, Daniel	Director	-	Indirect	Sale	7,867	29.44	$231,604.48	5,700	4
2024-10-04	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	986	28.73	$28,327.78	94,622	4
2024-09-16	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,972	30.97	$61,072.84	95,608	4
2024-09-11	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	996	30.32	$30,198.72	97,580	4
2024-09-09	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	996	29.46	$29,342.16	98,576	4
2024-09-05	Bradbury, Daniel	Director	-	Indirect	Sale	7,867	29.02	$228,300.34	7,125	4
2024-09-04	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	298	30.02	$8,945.96	99,572	4
2024-09-03	Oelschlager, Kristen M	Officer	Chief Operating Officer	Direct	Sale	5,832	29.48	$171,927.36	134,841	4
2024-08-30	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	322	30.10	$9,692.20	100,287	4
2024-08-26	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	76	30.05	$2,283.80	101,943	4
2024-08-12	Bradbury, Daniel	Director	-	Indirect	Sale	7,883	26.65	$210,081.95	8,550	4
2024-08-07	Stokes, Frank	Officer	Chief Financial Officer	Direct	Sale	10,000	25.66	$256,600.00	30,823	4
2024-08-01	Oelschlager, Kristen M	Officer	Chief Operating Officer	Direct	Sale	12,989	23.24	$301,864.36	132,836	4
2024-07-29	Oelschlager, Kristen M	Officer	Chief Operating Officer	Direct	Sale	2,793	22.06	$61,613.58	145,825	4
2024-07-01	Oelschlager, Kristen M	Officer	Chief Operating Officer	Direct	Sale	2,793	21.22	$59,267.46	148,618	4
2024-06-03	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	2,368	23.68	$56,074.24	57,893	4
2024-05-14	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	2,368	24.56	$58,158.08	60,261	4
2024-05-06	Bradbury, Daniel	Director	-	Indirect	Sale	23,323	24.64	$574,678.72	9,981	4
2024-05-06	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	2,368	24.72	$58,536.96	62,629	4
2024-04-23	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	421	20.11	$8,466.31	64,997	4
2024-04-12	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,947	20.35	$39,621.45	65,418	4
2024-04-08	Bradbury, Daniel	Director	-	Indirect	Sale	2,400	20.45	$49,080.00	17,944	4
2024-04-04	Bradbury, Daniel	Director	-	Indirect	Sale	9,152	21.45	$196,310.40	22,782	4
2024-04-03	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	2,368	21.70	$51,385.60	67,365	4
2024-03-21	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	73	20.70	$1,511.10	69,733	4
2024-03-07	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	2,372	20.77	$49,266.44	72,101	4
2024-03-05	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	4,131	21.41	$88,444.71	74,473	4
2024-03-04	Bradbury, Daniel	Director	-	Indirect	Sale	23,323	20.86	$486,517.78	25,907	4
2024-02-07	Bradbury, Daniel	Director	-	Indirect	Sale	2,074	23.20	$48,116.80	33,870	4
2024-02-06	Bradbury, Daniel	Director	-	Indirect	Sale	9,847	23.63	$232,684.61	34,578	4
2024-01-04	Bradbury, Daniel	Director	-	Indirect	Sale	18,223	20.40	$371,749.20	43,574	4
2023-12-28	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	3,954	22.17	$87,660.18	64,084	4
2023-12-26	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	5,180	21.93	$113,597.40	76,114	4
2023-12-21	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	10,999	21.40	$235,378.60	86,518	4
2023-12-18	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	5,720	20.27	$115,944.40	108,437	4
2023-12-15	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	3,709	20.21	$74,958.89	114,157	4
2023-12-13	Bradbury, Daniel	Director	-	Indirect	Sale	1,168	20.04	$23,406.72	49,796	4
2023-12-13	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	3,652	20.21	$73,806.92	127,018	4
2023-12-08	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	2,322	20.10	$46,672.20	94,895	4
2023-12-08	Bradbury, Daniel	Director	-	Indirect	Sale	6,875	20.09	$138,118.75	50,605	4
2023-12-06	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	48	20.02	$960.96	97,217	4
2023-12-06	Bradbury, Daniel	Director	-	Indirect	Sale	200	20.02	$4,004.00	52,952	4
2023-12-04	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	1,379	20.08	$27,690.32	97,265	4
2023-12-04	Bradbury, Daniel	Director	-	Indirect	Sale	4,340	20.08	$87,147.20	53,020	4
2023-11-30	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	4,510	20.07	$90,515.70	101,879	4
2023-11-30	Bradbury, Daniel	Director	-	Indirect	Sale	12,179	20.08	$244,554.32	57,761	4
2023-11-24	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	287	20.03	$5,748.61	112,132	4
2023-11-24	Bradbury, Daniel	Director	-	Indirect	Sale	800	20.02	$16,016.00	63,665	4
2023-11-21	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	758	20.01	$15,167.58	112,419	4
2023-11-21	Bradbury, Daniel	Director	-	Indirect	Sale	300	20.00	$6,000.00	63,825	4
2023-09-01	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	718	20.05	$14,395.90	115,103	4
2023-09-01	Bradbury, Daniel	Director	-	Indirect	Sale	1,802	20.04	$36,112.08	65,037	4
2023-08-31	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	4,084	20.06	$81,925.04	115,821	4
2023-08-31	Bradbury, Daniel	Director	-	Indirect	Sale	7,286	20.05	$146,084.30	65,397	4
2023-08-03	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	286	20.10	$5,748.60	121,527	4
2023-07-07	Bradbury, Daniel	Director	-	Indirect	Sale	50,000	20.39	$1,019,500.00	67,780	4
2023-07-07	Maetzold, Derek J	Director,Officer	Pres. & Chief Exec. Officer	Direct	Sale	8,376	20.04	$167,855.04	121,813	4
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Institutional Ownership

No data available for chart

2026-03-31

88.25%

Inst. Shares: 26,375,659

Shares Outstanding: 29,889,000

2025-12-31

91.64%

Inst. Shares: 26,563,174

Shares Outstanding: 28,986,000

2025-09-30

88.72%

Inst. Shares: 25,794,148

Shares Outstanding: 29,073,000

2025-06-30

87.53%

Inst. Shares: 25,309,035

Shares Outstanding: 28,914,000

2025-03-31

84.35%

Inst. Shares: 24,131,115

Shares Outstanding: 28,609,000

Date	Institutional Shares Owned	Shares Outstanding	Institutional Ownership %
2026-03-31	26,375,659	29,889,000	88.25%
2025-12-31	26,563,174	28,986,000	91.64%
2025-09-30	25,794,148	29,073,000	88.72%
2025-06-30	25,309,035	28,914,000	87.53%
2025-03-31	24,131,115	28,609,000	84.35%
2024-12-31	25,232,507	27,776,000	90.84%
2024-09-30	24,380,827	27,840,000	87.57%
2024-06-30	24,046,145	27,646,000	86.98%
2024-03-31	23,677,473	27,485,000	86.15%
2023-12-31	22,848,556	26,802,000	85.25%
2023-09-30	21,708,431	26,834,000	80.90%
2023-06-30	21,606,052	26,733,000	80.82%
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CASTLE BIOSCIENCES INC (CSTL) — SEC Financial Statements & Analysis

CASTLE BIOSCIENCES INC (CSTL) is a services-medical laboratories company, incorporated in DE. CASTLE BIOSCIENCES INC trades on Nasdaq as: CSTL. Based on its latest SEC filing (Form 10-Q, period ending 2026-06-30), CASTLE BIOSCIENCES INC reported a 3.18% year-over-year revenue growth, a Gross Profit Margin of 77.26% (TTM), a Debt-to-Equity ratio of 0.19x, a Price-to-Sales (P/S) ratio of 2.03x (TTM), a Price-to-Book (P/B) ratio of 1.54x (TTM), at a market cap of $725.02M. Figures below are sourced from SEC EDGAR, as-filed.

Net Revenue TTM Growth 1Y: 3.18%
Gross Profit Margin TTM: 77.26%
Debt To Equity: 0.19x
P/S TTM: 2.03x
P/B TTM: 1.54x
Market Cap: $725.02M

Data as of 2026-06-30 · Source: SEC EDGAR

Frequently Asked Questions

What industry is CASTLE BIOSCIENCES INC in?

CASTLE BIOSCIENCES INC (CSTL) operates in the Services-Medical Laboratories industry.

What is CSTL's market cap?

CASTLE BIOSCIENCES INC (CSTL) has a market capitalization of $725.02M as of 2026-06-30.

What exchange does CSTL trade on?

CASTLE BIOSCIENCES INC (CSTL) trades on the Nasdaq.

Where is CASTLE BIOSCIENCES INC incorporated?

CASTLE BIOSCIENCES INC is incorporated in DE.