CASTLE BIOSCIENCES, INC. (CSTL) FY2026 Q2 Statement of Cash Flows

Statement of Cash Flows

2026-04-01 to 2026-06-30

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CASTLE BIOSCIENCES, INC. cash flow reconciliation, Apr 1, 2026 through Jun 30, 2026One connected Sankey reconciles operating, investing and financing net cash flows through a shared cash pool, from beginning cash to ending cash. Ribbons flow left to right on one dollar scale. Activity totals are dark gray; beginning and ending cash are blue. Cash basis for beginning and ending balances and net cash change: Cash, cash equivalents, and restricted cash. Intermediate calculation bars are lighter gray. Net income is green for profit and red for loss. Identified asset purchases, sales and maturities are blue in either cash direction. Purple identifies capital transactions such as borrowing, repayments, share issuance and dividends. Free cash flow is a separate comparison, not an added cash flow. Read chart description and values below for full signed amounts, including zero items.Stock-based compensation expense → operating reconciliation: $11,589,000.00Accrued compensation → operating reconciliation: $7,782,000.00Depreciation and amortization → operating reconciliation: $4,070,000.00Other accrued and current liabilities → operating reconciliation: $2,559,000.00Net (gains) losses on equity securities → operating reconciliation: $630,000.00Other → operating reconciliation: $235,000.00Operating lease assets → operating reconciliation: $228,000.00operating reconciliation → Net cash from operating activities: $15,201,000.00operating reconciliation → Net loss: $2,060,000.00operating reconciliation → Accounts receivable: $5,817,000.00operating reconciliation → Accounts payable: $2,307,000.00operating reconciliation → Prepaid expenses and other current assets: $877,000.00operating reconciliation → Accretion of discounts on marketable investment securities: $392,000.00operating reconciliation → Other assets: $258,000.00operating reconciliation → Inventory: $119,000.00operating reconciliation → Operating lease liabilities: $59,000.00operating reconciliation → Deferred income taxes: $3,000.00Proceeds from maturities of marketable investment securities → investing reconciliation: $41,000,000.00Proceeds from maturities of debt securities classified as held-to-maturity → investing reconciliation: $5,600,000.00Proceeds from sale of equity securities → investing reconciliation: $567,000.00Proceeds from sale of property and equipment → investing reconciliation: $6,000.00investing reconciliation → Purchases of marketable investment securities: $54,486,000.00investing reconciliation → Purchases of property and equipment: $8,650,000.00Net cash used in financing activities → financing reconciliation: $886,000.00Proceeds from contributions to the employee stock purchase plan → financing reconciliation: $836,000.00Proceeds from exercise of common stock options → financing reconciliation: $95,000.00financing reconciliation → Payment of contingent consideration: $1,000,000.00financing reconciliation → Payment of employees’ taxes on vested restricted stock units and performance-based restricted stock units: $793,000.00financing reconciliation → Repayment of principal portion of finance lease liabilities: $24,000.00Net cash used in investing activities → investing reconciliation: $15,963,000.00Beginning cash: Cash, cash equivalents, and restricted cash → Cash sources and uses: $63,764,000.00Net cash from operating activities → Cash sources and uses: $15,201,000.00Cash sources and uses → Ending cash: Cash, cash equivalents, and restricted cash: $62,116,000.00Cash sources and uses → Net cash used in investing activities: $15,963,000.00Cash sources and uses → Net cash used in financing activities: $886,000.00Stock-based compensation expense: $11,589,000.00Stock-based compensation+$11.59 MAccretion of discounts on marketable investment securities: -$392,000.00Investment discount & premium−$392.00 KAccrued compensation: $7,782,000.00Accrued compensation+$7.78 MInventory: -$119,000.00Inventories−$119.00 KNet loss: -$2,060,000.00Net loss−$2.06 MDeferred income taxes: -$3,000.00Deferred income taxes−$3.00 KOperating lease assets: $228,000.00Operating lease assets+$228.00 KOther: $235,000.00Other non-cash items+$235.00 KAccounts payable: -$2,307,000.00Accounts payable−$2.31 MPrepaid expenses and other current assets: -$877,000.00Prepaid & other assets−$877.00 KOther accrued and current liabilities: $2,559,000.00Other accrued liabilities+$2.56 MDepreciation and amortization: $4,070,000.00Depreciation & amortization+$4.07 MOperating lease liabilities: -$59,000.00Operating lease liabilities−$59.00 KOther assets: -$258,000.00Other operating assets−$258.00 KAccounts receivable: -$5,817,000.00Accounts receivable−$5.82 MNet (gains) losses on equity securities: $630,000.00Equity securities gain & loss+$630.00 KNet cash from operating activities: $15,201,000.00Operating cash+$15.20 Moperating reconciliation: $27,093,000.00Proceeds from exercise of common stock options: $95,000.00Stock option exercises+$95.00 KPayment of employees’ taxes on vested restricted stock units and performance-based restricted stock units: -$793,000.00Stock-award tax withholding−$793.00 KProceeds from contributions to the employee stock purchase plan: $836,000.00Stock plan proceeds+$836.00 KPayment of contingent consideration: -$1,000,000.00Contingent consideration paid−$1.00 MRepayment of principal portion of finance lease liabilities: -$24,000.00Finance lease payments−$24.00 KProceeds from lease incentives received: $0.00Net cash used in financing activities: -$886,000.00. Cash required to fund net payments.Financing cash−$886.00 Kfinancing reconciliation: $1,817,000.00Purchases of marketable investment securities: -$54,486,000.00AFS securities purchases−$54.49 MProceeds from maturities of marketable investment securities: $41,000,000.00Marketable securities proceeds+$41.00 MProceeds from maturities of debt securities classified as held-to-maturity: $5,600,000.00HTM securities maturities+$5.60 MPurchases of debt securities classified as held-to-maturity: $0.00Proceeds from sale of equity securities: $567,000.00Equity securities sales+$567.00 KAsset acquisition, net of cash and cash equivalents acquired: $0.00Purchases of property and equipment: -$8,650,000.00PP&E purchases−$8.65 MProceeds from sale of property and equipment: $6,000.00PP&E sales+$6.00 KNet cash used in investing activities: -$15,963,000.00. Cash required to fund net payments.Investing cash−$15.96 Minvesting reconciliation: $63,136,000.00Cash sources and uses: $78,965,000.00Beginning cash: Cash, cash equivalents, and restricted cash: $63,764,000.00Beginning cash$63.76 MEnding cash: Cash, cash equivalents, and restricted cash: $62,116,000.00Ending cash$62.12 MCASH RECONCILIATIONOperatingflowsInvestingflowsFinancingflowsNet loss −$2.06M + net operating adjustments $17.26M = operating cash +$15.20MFree cash flow$6.55 MOperating cash − cash spent on PP&ECash flow / Net incomeNot meaningfulOperating cash flow ÷ net incomeNet cash change−$1.65 MEnding cash − beginning cash
Chart details

CASTLE BIOSCIENCES, INC. cash flow reconciliation, Apr 1, 2026 through Jun 30, 2026

Cash flows for Apr 1, 2026 through Jun 30, 2026. Cash basis: Cash, cash equivalents, and restricted cash. Beginning cash: Mar 31, 2026. Ending cash: Jun 30, 2026. Beginning and ending cash are dated balances. Positive cash flows add cash; negative cash flows reduce it.

Beginning cash on Mar 31, 2026
63,764,000 US dollars. Beginning cash: Cash, cash equivalents, and restricted cash
Operating activities
15,201,000 US dollars. Net cash provided.
Net loss
negative 2,060,000 US dollars
Stock-based compensation expense
11,589,000 US dollars
Accretion of discounts on marketable investment securities
negative 392,000 US dollars
Accrued compensation
7,782,000 US dollars
Inventory
negative 119,000 US dollars
Deferred income taxes
negative 3,000 US dollars
Operating lease assets
228,000 US dollars
Other
235,000 US dollars
Accounts payable
negative 2,307,000 US dollars
Prepaid expenses and other current assets
negative 877,000 US dollars
Other accrued and current liabilities
2,559,000 US dollars
Depreciation and amortization
4,070,000 US dollars
Operating lease liabilities
negative 59,000 US dollars
Other assets
negative 258,000 US dollars
Accounts receivable
negative 5,817,000 US dollars
Net (gains) losses on equity securities
630,000 US dollars
Investing activities
negative 15,963,000 US dollars. Net cash used.
Purchases of marketable investment securities
negative 54,486,000 US dollars
Proceeds from maturities of marketable investment securities
41,000,000 US dollars
Proceeds from maturities of debt securities classified as held-to-maturity
5,600,000 US dollars
Purchases of debt securities classified as held-to-maturity
0 US dollars
Proceeds from sale of equity securities
567,000 US dollars
Asset acquisition, net of cash and cash equivalents acquired
0 US dollars
Purchases of property and equipment
negative 8,650,000 US dollars
Proceeds from sale of property and equipment
6,000 US dollars
Financing activities
negative 886,000 US dollars. Net cash used.
Proceeds from exercise of common stock options
95,000 US dollars
Payment of employees’ taxes on vested restricted stock units and performance-based restricted stock units
negative 793,000 US dollars
Proceeds from contributions to the employee stock purchase plan
836,000 US dollars
Payment of contingent consideration
negative 1,000,000 US dollars
Repayment of principal portion of finance lease liabilities
negative 24,000 US dollars
Proceeds from lease incentives received
0 US dollars
Operating adjustment reconciliation
27,093,000 US dollars. Intermediate calculation joining the operating reconciliation branches. Its gross amount includes any portion of net income routed through this junction. It is not an additional cash source or use.
financing gross reconciliation
1,817,000 US dollars. Gross amount at the activity's junction before offsetting its receipts and deductions. It is not an additional cash source or use.
investing gross reconciliation
63,136,000 US dollars. Gross amount at the activity's junction before offsetting its receipts and deductions. It is not an additional cash source or use.
Exchange-rate effect
0 US dollars
Ending cash on Jun 30, 2026
62,116,000 US dollars. Ending cash: Cash, cash equivalents, and restricted cash
Cash sources and uses
78,965,000 US dollars. Opening cash plus net sources, equal to net uses plus ending cash.
Net cash change
negative 1,648,000 US dollars. Ending cash minus beginning cash.
Cash flow / Net income
Not meaningful. Operating cash flow divided by reconciliation net income for the same period. The ratio is not meaningful when net income is zero or negative.
Operating cash flow
15,201,000 US dollars. Operating cash flow used in the free cash flow calculation.
Cash purchases of property, plant and equipment
8,650,000 US dollars. These cash purchases are already included in investing activities above.
Free cash flow
6,551,000 US dollars. A supplemental measure; finance-lease payments are excluded from this definition.

Chart connections

  • Beginning cash plus operating, investing and financing cash flows plus the exchange-rate effect equals ending cash. Negative amounts reduce cash.
  • Financing contributions meet at a reconciliation junction before connecting to the net cash total.
  • Investing contributions meet at a reconciliation junction before connecting to the net cash total.
  • Operating reconciliation adjustments are not all independent cash receipts.
  • Net loss −$2.06M + net operating adjustments $17.26M = operating cash +$15.20M. The loss reduces the earnings basis of the reconciliation; it is not a cash payment. The signed loss remains a deduction at the operating reconciliation junction.
  • Each activity has one net cash bar connected to the shared cash pool. Positive activity totals enter the pool; negative activity totals leave the pool to fund that activity's net payments. The central pool does not assign a particular funding source to a particular payment.
  • The intermediate calculation bars include both sides of the displayed activity breakdowns; they are not additional cash flows.
  • Operating cash flow minus cash purchases of property, plant and equipment equals free cash flow: 15,201,000 US dollars minus 8,650,000 US dollars equals 6,551,000 US dollars.
CASTLE BIOSCIENCES, INC. (CSTL) FY2026 Q2 Statement of Cash Flows Sankey chart
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