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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020
Cash flows from operating activities |  |  |
Net income | $ 154,783 | $ 50,210 | $ 29,737
Adjustments to reconcile net income to net cash provided by operating activities |  |  |
Depreciation and amortization | 5,040 | 3,702 | 900
Deferred income taxes | (41,247) | 4,987 | (7,099)
Stock-based compensation, net of amounts capitalized | 31,442 | 7,252 | 2,353
Non-cash lease expense | 1,159 | 2,433 | 2,000
Amortization of premium (accretion of discount) on marketable securities, net | 4,332 | 197 | (441)
Loss on sale of marketable securities | 1,231 | 0 | 0
Amortization of deferred contract costs | 9,755 | 6,883 | 5,070
Gain on sale of business | 0 | (4,698) | 0
Other | 410 | 403 | (52)
Changes in operating assets and liabilities, net of effect of acquisition: |  |  |
Accounts receivable | (31,017) | (20,452) | (12,036)
Prepaid expenses and other assets | (9,089) | (1,833) | (3,040)
Deferred contract costs | (9,609) | (9,384) | (5,674)
Accounts payable, accrued expenses and other liabilities | 8,664 | 7,285 | 5,056
Deferred revenue | 1,828 | 38,571 | 13,318
Operating lease liabilities | (1,107) | (2,583) | (3,893)
Net cash provided by operating activities | 126,575 | 82,973 | 26,199
Cash flows from investing activities |  |  |
Purchases of property and equipment | (1,912) | (245) | (285)
Internal-use software development costs | (3,785) | (4,365) | (3,959)
Purchases of marketable securities | (1,317,193) | (78,880) | (79,107)
Maturities of marketable securities | 47,919 | 40,537 | 70,256
Sales of marketable securities | 633,802 | 0 | 0
Cash paid for acquisition, net of cash acquired | 0 | (31,682) | 0
Proceeds from sale of business | 0 | 4,230 | 0
Other | 595 | (12) | 0
Net cash used in investing activities | (640,574) | (70,417) | (13,095)
Cash flows from financing activities |  |  |
Proceeds from issuance of common stock upon initial public offering after deducting underwriting discounts and commissions | 553,905 | 0 | 0
Proceeds from issuance of common stock upon exercise of stock options | 12,612 | 8,897 | 1,694
Proceeds from issuance of common stock in connection with the employee stock purchase plan | 1,395 | 0 | 0
Taxes paid related to net share settlement of equity awards | (817) | 0 | 0
Repurchase of common stock | (2,698) | (2,022) | 0
Payments for deferred offering costs | (3,982) | (1,468) | 0
Proceeds from exercise of redeemable convertible preferred stock warrants | 0 | 0 | 25
Net cash provided by financing activities | 560,415 | 5,407 | 1,719
Net increase in cash and cash equivalents | 46,416 | 17,963 | 14,823
Cash and cash equivalents, beginning of period | 66,393 | 48,430 | 33,607
Cash and cash equivalents, end of period | 112,809 | 66,393 | 48,430
Supplemental disclosures of cash flow information |  |  |
Cash paid for taxes | 206 | 5,972 | 1,237
Non-cash financing and investing activities |  |  |
Conversion of redeemable convertible preferred stock to common stock | 81,458 | 0 | 0
Unpaid deferred offering costs | 0 | 782 | 0
Common stock issued in acquisition | 0 | 1,062 | 0
Capitalized stock-based compensation for internal-use software development costs | 497 | 195 | 184
Amounts held in escrow related to sale of business | 0 | 470 | 0
Operating lease right-of-use assets obtained in exchange for modified operating lease liabilities | $ 1,151 | $ 0 | $ 0

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