Robinhood Markets (HOOD) 10-Q 29 Oct 21 2021 Q3 Quarterly report Financial data

Cover

Cover - shares	9 Months Ended
	Sep. 30, 2021	Oct. 27, 2021
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	001-40691
Entity Registrant Name	Robinhood Markets, Inc.
Entity Incorporation, State	DE
Entity Tax Identification Number	46-4364776
Entity Address, Street	85 Willow Rd
Entity Address, City	Menlo Park
Entity Address, State	CA
Entity Address, Postal Zip Code	94025
City Area Code	844
Local Phone Number	428-5411
Title of each class	Class A Common Stock - $0.0001 par value per share
Trading Symbol(s)	HOOD
Name of each exchange on which registered	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Shell Company	false
Entity Central Index Key	0001783879
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Common Class A
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		729,550,661
Common Class B
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		130,155,246

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 6,166,705	$ 1,402,629
Cash and securities segregated under federal and other regulations	4,468,298	4,914,660
Receivables from brokers, dealers and clearing organizations	124,962	124,501
Receivables from users, net	6,099,497	3,354,142
Deposits with clearing organizations	316,221	225,514
Other current assets	1,674,013	851,138
Total current assets	18,849,696	10,872,584
Property, software and equipment, net	114,666	45,834
Goodwill	95,564	0
Intangible assets, net	35,227	185
Restricted cash	23,773	7,364
Other non-current assets	198,442	62,507
Total assets	19,317,368	10,988,474
Current liabilities:
Accounts payable and accrued expenses	237,147	104,649
Payables to users	6,811,169	5,897,242
Securities loaned	3,129,650	1,921,118
Other current liabilities	1,620,452	893,036
Total current liabilities	11,798,418	8,816,045
Other non-current liabilities	134,368	48,012
Total liabilities	11,932,786	8,864,057
Commitments and contingencies (Note 16)
Mezzanine equity
Carrying Value of Stock, Net of Issuance Costs	0	2,179,739
Stockholders’ (deficit) equity:
Preferred stock, $0.0001 par value. No shares authorized, issued and outstanding as of December 31, 2020; 210,000,000 shares authorized and no shares issued and outstanding as of September 30, 2021.	0	0
Common stock, value	0	1
Additional paid-in capital	10,837,381	134,307
Accumulated other comprehensive income	383	473
Accumulated deficit	(3,453,268)	(190,103)
Total stockholders’ (deficit) equity	7,384,582	(55,322)
Total liabilities, mezzanine equity and stockholders’ (deficit) equity	19,317,368	10,988,474
Common Class A
Stockholders’ (deficit) equity:
Common stock, value	73	0
Common Class B
Stockholders’ (deficit) equity:
Common stock, value	13	0
Common Class C
Stockholders’ (deficit) equity:
Common stock, value	$ 0	$ 0

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Redeemable convertible preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Redeemable convertible preferred stock, authorized (in shares)	0	414,033,220
Redeemable convertible preferred stock, issued (in shares)	0	412,742,897
Redeemable convertible preferred stock, outstanding (in shares)	0	412,742,897
Redeemable convertible preferred stock, Liquidation preference		$ 2,191,086,000
Preferred stock, par value (in USD per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)		0
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in USD per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	0	777,354,000
Common stock, shares issued (in shares)	0	229,031,546
Common stock, shares outstanding (in shares)	0	229,031,546
Common Class A
Common stock, par value (in USD per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	21,000,000,000	0
Common stock, shares issued (in shares)	725,229,836	0
Common stock, shares outstanding (in shares)	725,229,836	0
Common Class B
Common stock, par value (in USD per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	700,000,000	0
Common stock, shares issued (in shares)	130,155,246	0
Common stock, shares outstanding (in shares)	130,155,246	0
Common Class C
Common stock, par value (in USD per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	7,000,000,000	0
Common stock, shares issued (in shares)	0	0
Common stock, shares outstanding (in shares)	0	0

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues:
Net interest revenues	$ 63,405	$ 50,406	$ 193,611	$ 114,420
Total net revenues	364,923	269,530	1,452,430	641,291
Operating expenses:
Brokerage and transaction	44,031	31,444	122,847	80,460
Technology and development	679,162	55,491	952,367	133,667
Operations	108,337	40,962	275,966	93,239
Marketing	86,893	39,088	283,300	152,520
General and administrative	790,060	113,494	1,038,520	186,781
Total operating expenses	1,708,483	280,479	2,673,000	646,667
Change in fair value of convertible notes and warrant liability	25,336	0	2,045,657	0
Other expense (income), net	(1,955)	45	(2,104)	88
Loss before income tax	(1,366,941)	(10,994)	(3,264,123)	(5,464)
Provision for (benefit from) income taxes	(50,244)	(333)	(958)	115
Net loss	(1,316,697)	(10,661)	(3,263,165)	(5,579)
Net loss attributable to common stockholders:
Basic	(1,316,697)	(10,661)	(3,263,165)	(5,579)
Diluted	$ (1,316,697)	$ (10,661)	$ (3,263,165)	$ (5,579)
Net loss per share attributable to common stockholders:
Basic (in dollars per share)	$ (2.06)	$ (0.05)	$ (8.85)	$ (0.02)
Diluted (in dollars per share)	$ (2.06)	$ (0.05)	$ (8.85)	$ (0.02)
Weighted-average shares used to compute net loss per share attributable to common stockholders:
Basic (in shares)	638,168,188	225,997,444	368,518,894	225,299,165
Diluted (in shares)	638,168,188	225,997,444	368,518,894	225,299,165
Transaction-based revenues
Revenues:
Revenues	$ 266,797	$ 201,807	$ 1,138,403	$ 484,851
Other revenues
Revenues:
Revenues	$ 34,721	$ 17,317	$ 120,416	$ 42,020

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (1,316,697)	$ (10,661)	$ (3,263,165)	$ (5,579)
Other comprehensive income (loss), net of tax:
Foreign currency translation	(142)	194	(90)	20
Total other comprehensive income (loss), net of tax	(142)	194	(90)	20
Total comprehensive loss	$ (1,316,839)	$ (10,467)	$ (3,263,255)	$ (5,559)

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating activities:
Net loss	$ (3,263,165)	$ (5,579)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	15,734	6,572
Provision for credit losses	61,796	44,339
Share-based compensation	1,252,584	5,348
Change in fair value of convertible notes and warrant liability	2,045,657	0
Other	(121)	2,343
Changes in operating assets and liabilities:
Segregated securities under federal and other regulations	84,994	(4,999)
Increase (Decrease) in Receivables from Brokers-Dealers and Clearing Organizations	(461)	(62,709)
Receivables from users, net	(2,805,032)	(1,662,798)
Deposits with clearing organizations	(90,707)	(121,815)
Other current and non-current assets	(957,222)	(539,103)
Accounts payable and accrued expenses	118,460	109,398
Payables to users	913,927	2,729,643
Securities loaned	1,208,532	487,904
Other current and non-current liabilities	805,883	541,004
Net cash provided by (used in) operating activities	(609,141)	1,529,548
Investing activities:
Purchase of property, software and equipment	(46,107)	(17,582)
Capitalization of internally developed software	(12,619)	(5,708)
Acquisitions of a business, net of cash acquired	(119,161)	0
Other	(1,588)	0
Net cash used in investing activities	(179,475)	(23,290)
Financing activities:
Proceeds from issuance of common stock in connection with initial public offering, net of offering costs	2,057,530	0
Taxes paid related to net share settlement of equity awards	(411,772)	0
Proceeds from issuance of convertible notes and warrants	3,551,975	0
Draws on credit facilities	1,958,276	937,700
Repayments on credit facilities	(1,958,276)	(937,700)
Proceeds from issuance of redeemable convertible preferred stock, net of issuance costs	0	1,267,350
Proceeds from exercise of stock options, net of repurchases	11,780	3,587
Net cash provided by financing activities	5,209,513	1,270,937
Effect of foreign exchange rate changes on cash and cash equivalents	(90)	20
Net increase in cash, cash equivalents, segregated cash and restricted cash	4,420,807	2,777,215
Cash, cash equivalents, segregated cash and restricted cash, beginning of the period	6,189,659	3,069,568
Cash, cash equivalents, segregated cash and restricted cash, end of the period	10,610,466	5,846,783
Cash and cash equivalents, end of the period	6,166,705	2,023,654
Segregated cash, end of the period	4,418,298	3,815,765
Restricted cash, end of the period	25,463	7,364
Cash, cash equivalents, segregated cash and restricted cash, end of the period	10,610,466	5,846,783
Supplemental disclosures:
Cash paid for interest	6,183	2,698
Cash paid for income taxes, net of refund received	3,159	2,839
Non-cash financing activities:
Unpaid offering costs in connection with initial public offering	$ 5,150	$ 0

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF MEZZANINE EQUITY AND STOCKHOLDERS’ (DEFICIT) EQUITY - USD ($) $ in Thousands		Total	Redeemable convertible preferred stock	Series F	Series G	Common stock		Additional paid-in capital	Accumulated other comprehensive income	Accumulated deficit
Balance at beginning of period, Redeemable convertible preferred stock (in shares) at Dec. 31, 2019			321,626,778
Balance at beginning of period, Redeemable convertible preferred stock at Dec. 31, 2019			$ 912,411
Increase (decrease) in mazzanine equity
Issuance of convertible preferred stock, net of issuance costs (in shares)				48,000,000	43,116,119
Issuance of convertible preferred stock, net of issuance costs				$ 599,284	$ 668,066
Balance at end of period, Redeemable convertible preferred stock (in shares) at Sep. 30, 2020			412,742,897
Balance at end of period, Redeemable convertible preferred stock at Sep. 30, 2020			$ 2,179,761
Balance at beginning of period, Common stock (in shares) at Dec. 31, 2019						224,802,545
Balance at beginning of period at Dec. 31, 2019		$ (97,048)				$ 1		$ 99,439	$ 189	$ (196,677)
Increase (decrease) in stockholder's equity
Net loss		(5,579)								(5,579)
Shares issued in connection with employee stock plans (in shares)						1,883,789
Shares issued in connection with employee stock options		4,514						4,514
Vesting of early-exercised stock options		439						439
Repurchase of common stock (in shares)						(81,196)
Repurchase of common stock		(875)								(875)
Change in other comprehensive income		20							20
Share-based compensation		5,914						5,914
Balance at end of period, Common stock (in shares) at Sep. 30, 2020						226,605,138
Balance at end of period at Sep. 30, 2020		(92,615)				$ 1		110,306	209	(203,131)
Balance at beginning of period, Redeemable convertible preferred stock (in shares) at Jun. 30, 2020			366,266,778
Balance at beginning of period, Redeemable convertible preferred stock at Jun. 30, 2020			$ 1,469,708
Increase (decrease) in mazzanine equity
Issuance of convertible preferred stock, net of issuance costs (in shares)				3,360,000	43,116,119
Issuance of convertible preferred stock, net of issuance costs				$ 41,987	$ 668,066
Balance at end of period, Redeemable convertible preferred stock (in shares) at Sep. 30, 2020			412,742,897
Balance at end of period, Redeemable convertible preferred stock at Sep. 30, 2020			$ 2,179,761
Balance at beginning of period, Common stock (in shares) at Jun. 30, 2020						225,750,368
Balance at beginning of period at Jun. 30, 2020		(86,949)				$ 1		105,505	15	(192,470)
Increase (decrease) in stockholder's equity
Net loss		(10,661)								(10,661)
Shares issued in connection with employee stock plans (in shares)						865,966
Shares issued in connection with employee stock options		3,074						3,074
Vesting of early-exercised stock options		127						127
Repurchase of common stock (in shares)						(11,196)
Change in other comprehensive income		194							194
Share-based compensation		1,600						1,600
Balance at end of period, Common stock (in shares) at Sep. 30, 2020						226,605,138
Balance at end of period at Sep. 30, 2020		$ (92,615)				$ 1		110,306	209	(203,131)
Balance at beginning of period, Redeemable convertible preferred stock (in shares) at Dec. 31, 2020		412,742,897	412,742,897	48,000,000	43,116,119
Balance at beginning of period, Redeemable convertible preferred stock at Dec. 31, 2020		$ 2,179,739	$ 2,179,739	$ 599,284	$ 668,044
Balance at end of period, Redeemable convertible preferred stock (in shares) at Sep. 30, 2021		0	0
Balance at end of period, Redeemable convertible preferred stock at Sep. 30, 2021		$ 0	$ 0
Balance at beginning of period, Common stock (in shares) at Dec. 31, 2020		229,031,546				229,031,546	[1]
Balance at beginning of period at Dec. 31, 2020		$ (55,322)				$ 1	[1]	134,307	473	(190,103)
Increase (decrease) in stockholder's equity
Net loss		(3,263,165)							0	(3,263,165)
Shares issued in connection with employee stock plans (in shares)	[1]					5,819,965
Shares issued in connection with employee stock options		11,665				$ 24	[1]	11,641
Issuance of common stock in connection with initial public offering, net of issuance costs (in shares)	[1]					56,729,194
Issuance of common stock in connection with initial public offering, net of issuance costs		2,052,380				$ 6	[1]	2,052,374
Issuance of common stock upon settlement of restricted stock units, net of shares withheld (in shares)	[1]					13,759,434
Issuance of common stock upon settlement of restricted stock units, net of shares withheld		(411,772)						(411,772)
Vesting of early-exercised stock options		281						281
Conversion of preferred stock to common stock (in shares)			(412,742,897)			412,742,897	[1]
Conversion of preferred stock to common stock		2,179,739	$ (2,179,739)			$ 41	[1]	2,179,698
Conversion of convertible notes to common stock (in shares)	[1]					137,305,156
Conversion of convertible notes to common stock		5,217,597				$ 14	[1]	5,217,583
Reclassification of warrant liability to stockholders' equity		380,036						380,036
Vesting of replacement awards issued in connection with acquisition		639						639
Repurchase of common stock (in shares)	[1]					(3,110)
Change in other comprehensive income		(90)							(90)
Share-based compensation		$ 1,272,594						1,272,594
Balance at end of period, Common stock (in shares) at Sep. 30, 2021		0				855,385,082	[1]
Balance at end of period at Sep. 30, 2021		$ 7,384,582				$ 86	[1]	10,837,381	383	(3,453,268)
Balance at beginning of period, Redeemable convertible preferred stock (in shares) at Jun. 30, 2021			412,742,897
Balance at beginning of period, Redeemable convertible preferred stock at Jun. 30, 2021			$ 2,179,739
Balance at end of period, Redeemable convertible preferred stock (in shares) at Sep. 30, 2021		0	0
Balance at end of period, Redeemable convertible preferred stock at Sep. 30, 2021		$ 0	$ 0
Balance at beginning of period, Common stock (in shares) at Jun. 30, 2021	[2]					232,609,957
Balance at beginning of period at Jun. 30, 2021		(1,984,764)				$ 1	[2]	151,281	525	(2,136,571)
Increase (decrease) in stockholder's equity
Net loss		(1,316,697)								(1,316,697)
Shares issued in connection with employee stock plans (in shares)	[2]					2,238,444
Shares issued in connection with employee stock options		5,086				$ 24	[2]	5,062
Issuance of common stock in connection with initial public offering, net of issuance costs (in shares)	[2]					56,729,194
Issuance of common stock in connection with initial public offering, net of issuance costs		2,052,380				$ 6	[2]	2,052,374
Issuance of common stock upon settlement of restricted stock units, net of shares withheld (in shares)	[2]					13,759,434
Issuance of common stock upon settlement of restricted stock units, net of shares withheld		(411,772)						(411,772)
Vesting of early-exercised stock options		108						108
Conversion of preferred stock to common stock (in shares)			(412,742,897)			412,742,897	[2]
Conversion of preferred stock to common stock		2,179,739	$ (2,179,739)			$ 41	[2]	2,179,698
Conversion of convertible notes to common stock (in shares)	[2]					137,305,156
Conversion of convertible notes to common stock		5,217,597				$ 14	[2]	5,217,583
Reclassification of warrant liability to stockholders' equity		380,036						380,036
Vesting of replacement awards issued in connection with acquisition		639						639
Change in other comprehensive income		(142)							(142)
Share-based compensation		$ 1,262,372						1,262,372
Balance at end of period, Common stock (in shares) at Sep. 30, 2021		0				855,385,082	[1]
Balance at end of period at Sep. 30, 2021		$ 7,384,582				$ 86	[1]	$ 10,837,381	$ 383	$ (3,453,268)
[1]	The share amounts listed above combine common stock, Class A common stock and Class B common stock. In connection with the completion of our initial public offering, all previously outstanding shares of common stock were reclassified into Class A common stock and Class B common stock. Refer to Note 1 for more information.
[2]	The share amounts listed above combine common stock, Class A common stock and Class B common stock. In connection with the completion of our initial public offering, all previously outstanding shares of common stock were reclassified into Class A common stock and Class B common stock. Refer to Note 1 for more information.

DESCRIPTION OF BUSINESS AND SUM

DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	NOTE 1: DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Robinhood Markets, Inc. (“RHM”, together with its subsidiaries, “Robinhood”, the “Company”, “we”, or “us”) was incorporated in the State of Delaware on November 22, 2013. Our most significant, wholly-owned subsidiaries are: • Robinhood Financial LLC (“RHF”), a registered introducing broker-dealer; • Robinhood Securities, LLC (“RHS”), a registered clearing broker-dealer; and • Robinhood Crypto, LLC (“RHC”), which provides users the ability to buy and sell cryptocurrencies. Acting as the agent of the user, we facilitate the purchase and sale of options, cryptocurrencies, and equities through our platform by routing transactions through market makers, who are responsible for trade execution. Upon execution of a trade, users are legally required to purchase options, cryptocurrencies, or equities for cash from the transaction counterparty or to sell options, cryptocurrencies, or equities for cash to the transaction counterparty, depending on the transaction. Acting as agent, we facilitate and confirm trades only when there are binding, matched legal obligations from the user and the market maker on both sides of the trade. Our users have ownership of the securities, including those that collateralize margin loans, and cryptocurrencies transacted on our platform and, as a result, any such securities or cryptocurrencies owned by users are not presented in our unaudited condensed consolidated balance sheets. We do not allow users to purchase cryptocurrency on margin. We hold cryptocurrency in custody for our users’ accounts in one or more omnibus cryptocurrency wallets. In March 2020, the World Health Organization declared the outbreak of the novel coronavirus referred to as “COVID-19” to be a global pandemic. In response to the pandemic, we have enabled nearly all of our employees, some permanently, to work remotely and have restricted business travel. As vaccination rates among the population have increased, in the fourth quarter of 2021 we started to allow some employees to voluntarily return to work in our corporate offices but the timing of any full return for those employees who are not permanently remote has not been determined and will be impacted by developments related to the pandemic. Since the onset of the COVID-19 pandemic, we have seen substantial growth in our user base, retention, engagement and trading activity metrics, as well as continued gains and periodic all-time highs achieved by the equity markets generally. During this period, market volatility, stay-at-home orders and increased interest in investing and personal finance, coupled with low interest rates and a positive market environment, especially in the U.S. equity and cryptocurrency markets, helped foster an environment that has encouraged an unprecedented number of first-time retail investors to become our users and begin trading on our platform. However, the circumstances that have accelerated the growth of our user base in recent periods, particularly in the first half of 2021, might not continue in the future. For example, our Net Cumulative Funded Accounts declined slightly in the current quarter compared to the prior quarter in the same year. At the same time, the COVID-19 pandemic has resulted, in part, in inefficiencies or delays in our business, operational challenges, additional costs related to business continuity initiatives as our workforce is largely working remotely, and increased vulnerability to cybersecurity attacks or other privacy or data security incidents. The extent of the continuing impact of COVID-19 on our business, financial condition, and results of operations will depend largely on future developments, including the duration of the pandemic, actions taken to contain COVID-19 or address its impact, our ability to reintegrate our workforce or the ability of our workforce to adapt to the long-term distributed workforce model we have adopted (with some employees part- or full- time remote, and others not), the impact on capital and financial markets, and the related impact on the financial circumstances of our customers, all of which are highly uncertain and difficult to predict. Initial Public Offering On August 2, 2021, we closed our initial public offering ("IPO") of 55.0 million shares of Class A common stock, including 2.6 million shares sold by selling shareholders, at a public offering price of $38.00 per share. On August 31, 2021, we sold an additional 4.4 million shares of Class A common stock pursuant to the option granted to the underwriters to purchase additional shares. The total net proceeds we received in the IPO were approximately $2.05 billion after deducting underwriting discounts and commissions of $90.8 million and offering expenses of $12.6 million. In connection with the completion of the IPO: 1) the Company filed its Amended and Restated Certificate of Incorporation (the “Charter”), which authorizes a total of 21.0 billion shares of Class A common stock, 700.0 million shares of Class B common stock, 7.0 billion shares of Class C common stock, and 210.0 million shares of preferred stock, 2) all shares of our outstanding redeemable convertible preferred stock automatically converted into a total of 412.7 million shares of our common stock, 3) all 233.3 million previously outstanding shares of the Company’s common stock, along with the 412.7 million shares of common stock mentioned above, were automatically reclassified into an equivalent number of shares of the Company’s Class A common stock (the “Reclassification”), 4) a total of 130.2 million shares of Class A common stock held by our founders and their related entities were exchanged for an equivalent number of shares of Class B common stock pursuant to the terms of certain exchange agreements, 5) all of our outstanding convertible notes automatically converted into 137.3 million shares of Class A common stock and 6) all warrants became exercisable at a strike price of $26.60 per share for an aggregate of 14.3 million shares of Class A common stock. As a result, following the completion of the IPO, we have three classes of authorized common stock: Class A common stock, Class B common stock, and Class C common stock, of which only Class A common stock and Class B common stock were outstanding as of September 30, 2021. Refer to Note 13 for additional information about the terms of our various classes of common stock. Additionally, upon our IPO, we recogni zed $1.01 billion of share-bas ed compensation expense related to restricted stock units (“RSUs”) for which the time-based vesting condition was satisfied or partially satisfied as the performance condition, a liquidity event, was satisfied. Upon the IPO, 24.6 million RSUs vested and 10.8 million shares of Class A common stock were withheld to meet the related tax withholding requirements. Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) for interim financial reporting. The condensed consolidated financial statements are unaudited, and in management’s opinion, include all adjustments, including normal recurring adjustments and accruals necessary for a fair presentation of the results for the interim periods presented. Operating results for the periods presented are not necessarily indicative of the results that may be expected for the full fiscal year ended December 31, 2021 or any future period. These unaudited condensed consolidated financial statements should be read in conjunction with the audited annual consolidated financial statements and notes included in our final prospectus for our IPO dated July 28, 2021 and filed with the SEC pursuant to Rule 424(b)(4) under the Securities Act of 1934 on July 30, 2021 (the “Final Prospectus”). There have been no material changes in our significant accounting policies as described in our consolidated financial statements included in our audited annual consolidated financial statements for the year ended December 31, 2020, other than the adoption of the accounting pronouncement as described below in Note 2. The unaudited condensed consolidated financial statements include the accounts of RHM and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated. Use of Estimates The preparation of unaudited condensed consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts in the unaudited condensed consolidated financial statements and accompanying notes. We base our estimates on historical experience, and other assumptions we believe to be reasonable under the circumstances, which together form the basis for making judgments about the carrying values of assets and liabilities. Assumptions and estimates used in preparing our unaudited condensed consolidated financial statements include those related to the determination of allowances for credit losses, the capitalization and estimated useful life of internally developed software, contingent liabilities, useful lives of property and equipment, the incremental borrowing rate used to determine the present value of lease payments, the valuation and recognition of share-based compensation, the valuation of the convertible notes and warrant liability, the valuation and estimated useful lives of acquired intangible assets, uncertain tax positions, accrued liabilities, and the recognition and measurement of current and deferred income tax assets and liabilities. Actual results could differ from these estimates and could have a material adverse effect on our unaudited condensed consolidated financial statements. Concentration of Credit Risk We derived transaction-based revenues from individual market makers in excess of 10% of total revenues, as follows: Three Months Ended Nine Months Ended 2020 2021 2020 2021 Market maker: Citadel Securities, LLC 33 % 23 % 34 % 21 % Tai Mo Shan Limited (1) 1 % 8 % 2 % 17 % Entities affiliated with Susquehanna International Group, LLP (2) 18 % 13 % 20 % 11 % Entities affiliated with Wolverine Holdings, L.P. (3) 10 % 13 % 10 % 10 % All others individually less than 10% 13 % 16 % 9 % 19 % Total as percentage of total revenue: 75 % 73 % 75 % 78 % ________________ (1) Member of Jump Trading Group (2) Consists of Global Execution Brokers, LP and G1X Execution Services, LLC (3) Consists of Wolverine Execution Services, LLC and Wolverine Securities LLC We are engaged in various trading and brokerage activities in which the counterparties primarily include broker-dealers, banks, and other financial institutions. In the event our counterparties do not fulfill their obligations, we may be exposed to risk. The risk of default depends on the creditworthiness of the counterparty. Default of a counterparty in equities and options trades, which are facilitated through clearinghouses, would generally be spread among the clearinghouse's members rather than falling entirely on us. It is our policy to review, as necessary, the credit standing of each counterparty.

NEW ACCOUNTING PRONOUNCEMENTS

NEW ACCOUNTING PRONOUNCEMENTS	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
RECENT ACCOUNTING PRONOUNCEMENTS	NOTE 2: NEW ACCOUNTING PRONOUNCEMENTS Recently Adopted Accounting Pronouncements Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity In August 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2020-06, Debt—Debt with Conversion and Other Options and Derivatives and Hedging - Contracts in Entity’s Own Equity . This guidance simplifies the accounting for convertible instruments by reducing the number of accounting models available for convertible debt instruments, amends the accounting guidance for evaluating the classification of certain contracts in an entity’s own equity, and modifies the diluted earnings per share calculations for convertible instruments. The guidance is effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. Early adoption is permitted. We adopted this guidance effective January 1, 2021 using the full retrospective method. The adoption of the guidance did not have a material impact on our unaudited condensed consolidated financial statements. In May 2021, the FASB issued ASU 2021-04, Earnings Per Share, Debt—Modifications and Extinguishments, Compensation—Stock Compensation, and Derivatives and Hedging—Contracts in Entity’s Own Equity . The guidance clarifies modifications or exchanges of freestanding equity-classified written call options (e.g. warrants). The guidance is effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. Early adoption is permitted. We adopted this guidance effective July 1, 2021. The adoption of the guidance did not have a material impact on our unaudited condensed consolidated financial statements. Recently Issued Accounting Pronouncements Not Yet Adopted

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS	9 Months Ended
	Sep. 30, 2021
Business Combination and Asset Acquisition [Abstract]
BUSINESS COMBINATIONS	NOTE 3: BUSINESS COMBINATIONS On August 13, 2021, we acquired all outstanding stock of A Say Inc. and its subsidiaries ("Say Technologies"). Subsequently, we caused A Say Inc. to merge with each of its three subsidiaries and converted it into a limited liability company under the name Say Technologies LLC, which remains a wholly-owned subsidiary of RHM. New York-based Say Technologies, founded in 2017, is an investor communications and shareholder engagement platform. The acquisition of Say Technologies will allow us to empower retail investors to access their full ownership rights by facilitating proxy and issuer materials delivery and making shareholder voting on corporate matters easier. The acquisition date fair value of the consideration transferred for Say Technologies was $132.8 million, which consisted of the following: (in thousands) Fair Value Cash $ 132,168 Share-based compensation awards attributable to pre-combination services 639 Total consideration $ 132,807 We entered into holdback agreements with certain employees of Say Technologies for $11.1 million in cash payments, which are contingent upon the continuous service of the employees and treated as post-combination compensation expense over the required service period of three years. For employees of Say Technologies with unvested Say Technologies equity awards, we issued replacement awards under our 2021 Plan (as defined below in Note 13) with an estimated fair value of $6.3 million. Of this amount, $0.6 million was allocated to the consideration transferred and $5.7 million was allocated to post-combination services and will be expensed as compensation expense over the remaining service periods on a straight-line basis. In addition, we paid $1.9 million to cash-settle certain unvested Say Technologies equity awards, which was treated as post-combination compensation expense and recognized immediately as share-based compensation in our unaudited condensed consolidated statement of operations. Transaction costs associated with the acquisition, which included legal, due diligence, and other professional fees, were not material. The purchase price allocation is based on a preliminary valuation and subject to revision as more detailed analyses are completed and additional information about the fair value of assets acquired and liabilities assumed becomes available, including certain tax matters, during the measurement period (up to one year from the acquisition date). The following table summarizes the preliminary fair value of assets acquired and liabilities assumed as of the date of acquisition: (in thousands) Fair Value Cash and cash equivalents $ 15,412 Accounts receivable 1,704 Goodwill 93,094 Intangible assets 34,600 Other current assets 192 Accounts payable, accrued expenses and other current liabilities (9,354) Deferred tax liability (2,841) Net assets acquired $ 132,807 The excess of purchase consideration over the fair value of net tangible and identifiable intangible assets acquired was recorded as goodwill, which is not deductible for tax purposes. Goodwill is primarily attributed to the assembled workforce of Say Technologies and anticipated operational synergies. The fair values assigned to tangible and identifiable intangible assets acquired and liabilities assumed are based on management’s estimates and assumptions at the time of acquisition. The following table sets forth the components of identifiable intangible assets acquired and their estimated useful lives as of the date of acquisition: (in thousands, except years) Fair Value Useful Life Developed technology $ 22,000 3 Customer relationships 12,000 10 Trade names 600 3 Total $ 34,600 The overall weighted average useful life of the identified amortizable intangible assets acquired is five years. The estimated fair value of the intangible assets acquired approximate the amounts a market participant would pay for these intangible assets as of August 13, 2021. We used the replacement cost method to estimate the fair value of developed technology and the relief from royalty method to estimate the fair value of trade names. A multi-period excess earnings method was used to estimate the fair value of customer relationships. Tangible net assets were valued at their respective carrying amounts as of the acquisition date, as these amounts approximated fair value.

REVENUE

REVENUE	9 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
REVENUES	NOTE 5: REVENUES Disaggregation of Revenues The following table presents our revenue disaggregated by revenue source: Three Months Ended Nine Months Ended (in thousands) 2020 2021 2020 2021 Transaction-based revenues: Options $ 126,769 $ 163,750 $ 297,677 $ 526,214 Cryptocurrencies 5,282 50,723 14,840 371,413 Equities 68,818 50,459 171,013 235,772 Other 938 1,865 1,321 5,004 Total transaction-based revenues 201,807 266,797 484,851 1,138,403 Net interest revenues: Securities lending 27,891 33,495 63,029 108,569 Margin interest 21,288 34,238 40,075 93,199 Interest on segregated cash and securities 1,359 1,071 11,991 3,112 Other interest revenue 743 853 3,259 3,050 Interest expenses related to credit facilities (875) (6,252) (3,934) (14,319) Total net interest revenues 50,406 63,405 114,420 193,611 Other revenues 17,317 34,721 42,020 120,416 Total net revenues $ 269,530 $ 364,923 $ 641,291 $ 1,452,430 Contract Balances Contract receivables are recognized when we have an unconditional right to invoice and receive payment under a contract with a customer and are derecognized when cash is received. Transaction-based revenue receivables due from market makers are reported in receivables from brokers, dealers and clearing organizations while other revenue receivables due from our relationship with a third-party investor communications company are reported in other current assets on the unaudited condensed consolidated balance sheets. The table below sets forth contract receivables balances for the period indicated: (in thousands) Contract Receivables Beginning of period, January 1, 2021 $ 111,871 End of period, September 30, 2021 115,298 Increase in contract receivables during the period $ 3,427 The difference between the opening and ending balance of our contract receivables primarily results from the growth of our business over the period and timing differences between our performance and counterparties’ payments. Contract liabilities consist of unearned subscription revenue which are recognized when users remit contractual cash payments in advance of the time we satisfy our performance obligations under the contract and are recorded as other current liabilities on the unaudited condensed consolidated balance sheets. The table below sets forth contract liabilities balances for the period indicated: (in thousands) Contract Liabilities Beginning of period, January 1, 2021 $ 2,060 End of period, September 30, 2021 3,298 Increase in contract liabilities during the period $ 1,238

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND INTANGIBLE ASSETS	NOTE 4: GOODWILL AND INTANGIBLE ASSETS Goodwill The carrying amount of goodwill for the period indicated was as follows: (in thousands) Carrying Amount As of December 31, 2020 $ — Additions due to business combinations 95,564 As of September 30, 2021 $ 95,564 Substantially all of the additions related to the Say Technologies acquisition as disclosed in Note 3 and the remainder related to an immaterial business acquisition. There was no impairment of goodwill during the three and nine months ended September 30, 2021. Intangible Assets The components of intangible assets, net as of September 30, 2021 were as follows: (in thousands, except years) Gross Carrying Value Accumulated Amortization Net Carrying Value Weighted Average Remaining Useful Life - Years Finite-lived intangible assets Developed technology $ 22,000 $ (964) $ 21,036 3 Customer relationships 12,000 (158) 11,842 10 Trade names 600 (26) 574 3 Domain names 163 (40) 123 12 Indefinite-lived intangible assets 1,652 — 1,652 N/A Total $ 36,415 $ (1,188) $ 35,227 As of September 30, 2021, the estimated future amortization expense of finite-lived intangible assets was as follows: (in thousands) Intangible Assets Remainder of 2021 $ 2,210 2022 8,768 2023 8,768 2024 5,890 2025 1,199 Thereafter 6,740 Total $ 33,575 Amortization expense of intangible assets was not material for three and nine months ended September 30, 2020.

ALLOWANCE FOR CREDIT LOSSES

ALLOWANCE FOR CREDIT LOSSES	9 Months Ended
	Sep. 30, 2021
Credit Loss [Abstract]
ALLOWANCE FOR CREDIT LOSSES	NOTE 6: ALLOWANCE FOR CREDIT LOSSES The following table summarizes the allowance for credit losses, which primarily relate to unsecured balances of receivables from users due to fraudulent, unlawful or otherwise inappropriate customer behavior, such as when customers initiate deposits into their accounts, make trades on our platform using a short-term extension of credit from us, and then repatriate or reverse the deposits, resulting in a loss to us of the credited amount (“Fraudulent Deposit Transactions”) and to a lesser extent, losses on margin borrowings, for the periods indicated: Three Months Ended Nine Months Ended (in thousands) 2020 2021 2020 2021 Beginning balance $ 41,055 $ 35,253 $ 17,122 $ 34,092 Provision for credit losses 20,406 25,051 44,339 61,796 Write-offs (552) (22,552) $ (552) $ (58,136) Ending balance $ 60,909 $ 37,752 $ 60,909 $ 37,752 During the three and nine months ended September 30, 2020, the provision for credit losses related to unsecured balances of receivables from users was $20.1 million and $43.4 million while the remaining $0.3 million and $0.9 million was related to other receivables. During the three and nine months ended September 30, 2021, the provision for credit losses related to unsecured receivables from users was $24.7 million and $59.6 million while the remaining $0.3 million and $2.2 million was related to other receivables. As of September 30, 2020 and 2021, the ending allowance for credit losses related to unsecured balances of receivables from users was $60.5 million and $35.0 million while the remaining $0.4 million and $2.8 million were related to other receivables.

FAIR VALUE OF FINANCIAL INSTRUM

FAIR VALUE OF FINANCIAL INSTRUMENTS	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
FAIR VALUE OF FINANCIAL INSTRUMENTS	NOTE 7: FAIR VALUE OF FINANCIAL INSTRUMENTS Financial assets and liabilities measured at fair value on a recurring basis as of the date indicated below were presented on our unaudited condensed consolidated balance sheets as follows: December 31, 2020 (in thousands) Level 1 Level 2 Level 3 Total Assets Cash equivalents: Money market funds $ 1,026,034 $ — $ — $ 1,026,034 Cash and securities segregated under federal and other regulations: U.S. Treasury securities 134,994 — — 134,994 Other current assets: Equity securities - user-held fractional shares 802,483 — — 802,483 Equity securities - securities owned 3,222 — — 3,222 Total financial assets $ 1,966,733 $ — $ — $ 1,966,733 Liabilities Accounts payable and accrued expenses: Equity securities - referral program liability $ 695 $ — $ — $ 695 Other current liabilities: Equity securities - repurchase obligations 802,483 — — 802,483 Total financial liabilities $ 803,178 $ — $ — $ 803,178 September 30, 2021 (in thousands) Level 1 Level 2 Level 3 Total Assets Cash equivalents: Money market funds $ 4,006,138 $ — $ — $ 4,006,138 Cash and securities segregated under federal and other regulations: U.S. Treasury securities 50,000 — — 50,000 Other current assets: Equity securities - user-held fractional shares 1,530,971 — — 1,530,971 Equity securities - securities owned 22,769 — — 22,769 Total financial assets $ 5,609,878 $ — $ — $ 5,609,878 Liabilities Accounts payable and accrued expenses: Equity securities - referral program liability $ 46 $ — $ — $ 46 Other current liabilities: Equity securities - repurchase obligations 1,530,971 — — 1,530,971 Total financial liabilities $ 1,531,017 $ — $ — $ 1,531,017 We measure our cash equivalents, securities segregated under federal and other regulations, equity securities owned by us for the promotional stock referral and fractional shares programs, and user-held fractional shares at fair value. Repurchase obligations in connection with our fractional shares program and equity securities that were awarded to our users as a part of our promotional stock referral program but had not been claimed as of December 31, 2020 and September 30, 2021 are also measured at fair value. We have evaluated the estimated fair value of financial instruments using available market information such as quoted market prices for the same instrument in active markets. Such instruments are classified within Level 1 of the fair value hierarchy. During the nine months ended September 30, 2021, we did not have any transfers in or out of Level 3 assets or liabilities. Convertible Notes and Warrant Liability In February 2021, we issued two tranches of convertible notes (the “convertible notes”) and granted to each purchaser of the Tranche I convertible notes a warrant to purchase equity securities (the “warrant liability”) - see Note 12 for more information. We have elected the fair value option for both tranches of the convertible notes as we believe it best reflects their underlying economics. Under the fair value option, the convertible notes are initially measured at their issuance date estimated fair value and subsequently remeasured at their estimated fair value at the end of each reporting period. Upon the closing of the IPO, all of our outstanding convertible notes and warrants were reclassified from liability to equity. See Note 12 for more information. For the three and nine months ended September 30, 2021, we recorded expense due to changes in fair value of $27.8 million and $1,918.6 million for the convertible notes in our unaudited condensed consolidated statements of operations, none of which is attributable to the change in the instrument-specific credit risk. We have elected to present the component related to accrued interest in the change in fair value of convertible notes and warrant liability. For the three and nine months ended September 30, 2021, due to changes in fair value, we recorded income of $2.5 million and expense of $127.1 million for the warrant liability in our unaudited condensed consolidated statements of operations. The following table sets forth a summary of the changes in the estimated fair value of our convertible notes and warrant liability: (in thousands) Convertible notes Warrant liability Beginning of period, January 1, 2021 $ — $ — Issued during the period 3,299,031 252,944 Change in fair value 1,918,565 127,092 Reclassifications to equity (5,217,596) (380,036) End of period, September 30, 2021 $ — $ —

INCOME TAXES

INCOME TAXES	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
INCOME TAXES	NOTE 8: INCOME TAXES Three Months Ended Nine Months Ended (in thousands, except percentages) 2020 2021 2020 2021 Loss before income taxes $ (10,994) $ (1,366,941) $ (5,464) $ (3,264,123) Provision (benefit from) for income taxes (333) (50,244) 115 (958) Effective Tax Rate 3.0 % 3.7 % (2.1) % — % Our tax provision for interim periods is determined using an estimated annual effective tax rate (“ETR”), adjusted for discrete items arising in the period. In each quarter, we update our estimated annual ETR and make a year-to-date calculation of the provision. For the three months ended September 30, 2020, the ETR was lower than the U.S. federal statutory rate primarily due to the full valuation allowance on our U.S. federal and state deferred tax assets offset by our current state taxes payable. For the three months ended September 30, 2021, the ETR differs from the U.S. federal statutory rate primarily due to the recognition of tax benefits from share-based compensation upon the IPO offset by the change in valuation allowance on our remaining U.S. federal and state deferred tax assets. For the nine months ended September 30, 2020, the ETR was lower than the U.S. federal statutory rate primarily due to the full valuation allowance on our U.S. federal and state deferred tax assets offset by our current state taxes payable. For the nine months ended September 30, 2021, the ETR differs from the U.S. federal statutory rate primarily due to the partial release of our valuation allowance resulting from the recognition of net deferred tax liabilities with the Say Technologies acquisition, and the change in valuation allowance on our remaining U.S. federal and state deferred tax assets partially offset by our current state taxes payable. The acquired net deferred tax liabilities primarily consisted of the allocation of the purchase consideration to non-deductible identifiable intangible assets related to developed technology, customer relationship and trade names. The realization of tax benefits of net deferred tax assets is dependent upon future levels of taxable income, of an appropriate character, in the periods the items are expected to be deductible or taxable. Based on the available objective evidence during the nine months ended September 30, 2021, we believe it is more likely than not that the tax benefits of the remaining U.S. net deferred tax assets may not be realized. Utilization of the net operating loss and credit carryforwards may be subject to a substantial annual limitation due to the ownership change limitations provided by the Internal Revenue Code of 1986, as

PROPERTY, SOFTWARE AND EQUIPMEN

PROPERTY, SOFTWARE AND EQUIPMENT, NET	9 Months Ended
	Sep. 30, 2021
Property, Plant and Equipment [Abstract]
PROPERTY, SOFTWARE AND EQUIPMENT, NET	NOTE 9: PROPERTY, SOFTWARE AND EQUIPMENT, NET Property, software and equipment are presented net of accumulated depreciation and amortization and summarized as follows: December 31, September 30, (in thousands) 2020 2021 Tenant improvements $ 18,945 $ 53,395 Internally developed software 16,992 25,397 Computer equipment 9,203 22,003 Furniture and fixtures 8,024 17,965 Construction in progress 9,756 27,413 Total 62,920 146,173 Less: accumulated depreciation and amortization (17,086) (31,507) Property, software and equipment, net $ 45,834 $ 114,666 Depreciation expense of property and equipment was $1.6 million and $3.7 million for the three and nine months ended September 30, 2020, and $4.1 million and $9.9 million for the three and nine months ended September 30, 2021. Amortization expense of internally developed software was $1.1 million and $2.9 million for the three and nine months ended September 30, 2020 and $1.8 million and $4.7 million for the three and nine months ended September 30, 2021.

OFFSETTING ASSETS AND LIABILITI

OFFSETTING ASSETS AND LIABILITIES	9 Months Ended
	Sep. 30, 2021
Offsetting [Abstract]
OFFSETTING ASSETS AND LIABILITIES	NOTE 10: OFFSETTING ASSETS AND LIABILITIES Certain financial instruments are eligible for offset on our unaudited condensed consolidated balance sheets under GAAP. Our securities borrowing and lending agreements are subject to master netting arrangements and collateral arrangements and meet the GAAP guidance to qualify for offset. A master netting arrangement with a counterparty creates a right of offset for amounts due to and from that same counterparty that is enforceable in the event of a default or bankruptcy. Our policy is to recognize amounts subject to master netting arrangements on a gross basis on the unaudited condensed consolidated balance sheets. Substantially all securities borrowing and lending agreements have an open contractual term and may be terminated upon notice by either party. One of these agreements has a contractual term of 30 days with a daily minimum commitment of $25 million. Our assets and liabilities subject to master netting arrangements are as follows: December 31, September 30, (in thousands) 2020 2021 Assets Securities borrowed Gross amount of securities borrowed $ 372 $ 879 Gross amount offset on the unaudited condensed consolidated balance sheets — — Amounts of assets presented on the unaudited condensed consolidated balance sheets (1) 372 879 Gross amount of securities borrowed not offset on the unaudited condensed consolidated balance sheets: Securities borrowed 372 879 Security collateral received (361) (816) Net amount $ 11 $ 63 Liabilities Securities loaned Gross amount of securities loaned $ 1,921,118 $ 3,129,650 Gross amount of securities loaned offset on the unaudited condensed consolidated balance sheets — — Amounts of liabilities presented on the unaudited condensed consolidated balance sheets 1,921,118 3,129,650 Gross amount of securities loaned not offset on the unaudited condensed consolidated balance sheets: Securities loaned 1,921,118 3,129,650 Security collateral pledged (1,787,819) (3,017,536) Net amount $ 133,299 $ 112,114 ________________ (1) Securities borrowed are included in receivables from brokers, dealers and clearing organizations on the unaudited condensed consolidated balance sheets.

OTHER CURRENT ASSETS

OTHER CURRENT ASSETS	9 Months Ended
	Sep. 30, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
OTHER CURRENT ASSETS	NOTE 11: OTHER CURRENT ASSETS Other current assets primarily includes user-held fractional shares for our fractional shares program and prepaid expenses, and to a lesser extent securities owned by us for the promotional stock referral and fractional shares program and other receivables. We classify prepayments made under contracts as prepaid expenses and expense them over the contract terms. Prepaid expenses primarily include prepayments on cloud infrastructure and other software services and prepayments on insurance. The following table presents the detail of other current assets: December 31, September 30, (in thousands) 2020 2021 User-held fractional shares $ 802,483 $ 1,530,971 Prepaid expenses 28,629 98,303 Securities owned 3,222 22,769 Restricted cash — 1,690 Other 16,804 20,280 Total other current assets $ 851,138 $ 1,674,013

FINANCING ACTIVITIES AND OFF-BA

FINANCING ACTIVITIES AND OFF-BALANCE SHEET RISK	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
FINANCING ACTIVITIES AND OFF-BALANCE SHEET RISK	NOTE 12: FINANCING ACTIVITIES AND OFF-BALANCE SHEET RISK Revolving Credit Facilities In September 2019, we entered into a $400.0 million committed and secured line of credit with a maturity date of September 25, 2020 (the “September 2019 Credit Facility”). In June 2020, we amended the September 2019 Credit Facility and increased the aggregate committed and secured revolving line of credit amount to $550.0 million with a maturity date of June 5, 2021. This line of credit was primarily collateralized by users’ securities held as collateral for users’ margin loans. Interest for this line of credit was determined at the time a loan was initiated and the applicable interest rate under this line of credit was calculated as a per annum rate equal to 1.25% plus the federal funds rate at the applicable time. There were no outstanding borrowings under the September 2019 Credit Facility at December 31, 2020. We were obligated to pay a commitment fee calculated as a per annum rate equal to 0.35% on any unused amount of the credit facility quarterly in arrears. The September 2019 Credit Facility was terminated in April 2021. In October 2019, we entered into a $200.0 million committed and unsecured revolving line of credit with a syndicate of banks maturing in October 2023 (the “October 2019 Credit Facility”). In October 2020, we amended the October 2019 Credit Facility and, among other things, increased the aggregate committed and unsecured revolving line of credit amount to $600.0 million with a maturity date of October 29, 2024. In April 2021, we further increased the aggregate credit amount available under the October 2019 Credit Facility to $625.0 million. Loans under the October 2019 Credit Facility bear interest, at our option, at a per annum rate of either (a) the Eurodollar Rate plus 1.00% or (b) the Alternative Base Rate. The Eurodollar Rate is equal to the Eurodollar Base Rate, which is derived from London Interbank Offered Rate (“LIBOR”), multiplied by the Statutory Reserve Rate at the applicable time. The Alternative Base Rate is the greatest of (i) the prime rate then in effect, (ii) the Federal Reserve Bank of New York rate then in effect plus 0.50% and (iii) the Eurodollar Rate at such time for a one month interest period plus 1.00%. If LIBOR is unavailable or if we and the administrative agent elect, the Eurodollar Rate will be replaced by a rate calculated with reference to the Secured Overnight Financing Rate as set forth in the October 2019 Credit Facility agreement or an alternate benchmark rate selected by us and the administrative agent. There were no outstanding borrowings under the October 2019 Credit Facility at December 31, 2020 and September 30, 2021. We are obligated to pay a commitment fee calculated as a per annum rate equal to 0.10% on any unused amount of the October 2019 Credit Facility quarterly in arrears. In April 2021, we entered into a $2.18 billion committed and secured revolving line of credit, subject to certain borrowing base limitations, with a maturity date of April 15, 2022 (the “April 2021 Credit Facility”). Borrowings from the April 2021 Credit Facility must be specified to be Tranche A, Tranche B, Tranche C or a combination thereof. Tranche A loans are secured by users’ securities and are used primarily to finance margin loans. Tranche B loans are secured by the right to the return from National Securities Clearing Corporation (“NSCC”) of NSCC Margin Deposits and cash and property in a designated collateral account and used for the purpose of satisfying NSCC Deposit Requirements. Tranche C loans are secured by the right to the return of eligible funds from any reserve account of the Borrower and cash and property in a designated collateral account and used for the purpose of satisfying reserve requirements under Rule 15c3-3 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Interest for this line of credit is determined at the time a loan is initiated and the applicable interest rate is calculated as a per annum rate equal to 1.25% for Tranche A loans and 2.50% for Tranche B and Tranche C loans, plus the Short-Term Funding Rate at the applicable time. The Short-Term Funding Rate is equal to the greatest of (i) the Eurodollar Rate for a one month interest period on such day, which equals to the Eurodollar Base Rate that is derived from LIBOR, multiplied by the Statutory Reserve Rate at the applicable time, (ii) the Federal Funds Effective Rate and (iii) the Overnight Bank Funding Rate in effect on such day. There were no outstanding borrowings under the April 2021 Credit Facility at September 30, 2021. We are obligated to pay a commitment fee calculated as a per annum rate equal to 0.50% on any unused amount of the April 2021 Credit Facility quarterly in arrears. All of the agreements for the September 2019 Credit Facility, October 2019 Credit Facility and April 2021 Credit Facility contain customary covenants restricting our ability to incur debt, incur liens and undergo certain fundamental changes. We were in compliance with all covenants under these facilities as of December 31, 2020 and September 30, 2021, as applicable. Convertible Notes and Warrant Liability Convertible Notes In February 2021, we issued two tranches of convertible notes, consisting of $2.53 billion aggregate principal amount of Tranche I convertible notes and $1.02 billion aggregate principal amount of Tranche II convertible notes. Interest on the convertible notes accrued at 6% per annum, compounding semi-annually in arrears, and was payable in kind. The convertible notes did not have a maturity date. In the event of a public offering of our common stock to the public in an IPO on a nationally-recognized exchange in the United States, resulting in at least $500 million of gross proceeds to us (a “Qualifying IPO”) before the 12 month anniversary of the convertible notes issuance date, the convertible notes were to automatically convert into shares of our Class A common stock at a conversion price equal to the lower of (i) 70% of the cash price per share paid by investors in the Qualifying IPO and (ii) $38.29 (in the case of the Tranche I convertible notes) or $42.12 (in the case of the Tranche II convertible notes). As our IPO was a Qualifying IPO, upon completion, the aggregate outstanding principal and accrued interest of the convertible notes converted into 137.3 million shares of Class A common stock at a conversion price of $26.60 per share. Warrant Liability We granted to each purchaser of the Tranche I convertible notes a warrant, equal to 15% of the aggregate proceeds invested by such purchaser, to purchase a variable number of equity securities. In aggregate, the maximum purchase amount of all warrants is $379.8 million with a strike price that was to equal the lower of (i) 70% of the price per share in the Qualifying IPO and (ii) $38.29. As our IPO was a Qualified IPO, upon completion, the warrants became exercisable for 14.3 million shares of Class A common stock at a strike price of $26.60. As a result, the warrant liability was reclassified to additional paid-in capital, as the warrants are now exercisable for a fixed number of shares. As of September 30, 2021, the warrants have not been exercised. Off-Balance Sheet Risk In the normal course of business, we engage in activities involving settlement and financing of securities transactions. User securities transactions are recorded on a settlement date basis, which is two one

MEZZANINE EQUITY, COMMON STOCK

MEZZANINE EQUITY, COMMON STOCK AND STOCKHOLDERS' (DEFICIT) EQUITY	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
MEZZANINE EQUITY, COMMON STOCK AND STOCKHOLDERS' (DEFICIT) EQUITY	NOTE 13: MEZZANINE EQUITY, COMMON STOCK AND STOCKHOLDERS' (DEFICIT) EQUITY Redeemable Convertible Preferred Stock The following table is a summary of redeemable convertible preferred stock as of December 31, 2020: (in thousands, except share data and per share amounts) Series Shares Authorized Shares Issued and Outstanding Per Share Liquidation Preference Liquidation Amount Per Share Initial Conversion Price Carrying Value of Stock, Net of Issuance Costs A 131,913,460 131,913,460 $ 0.1954 $ 25,777 $ 0.1954 $ 16,139 B 80,263,020 80,263,020 0.6354 50,999 0.6354 50,999 C 43,788,180 43,788,180 2.5121 110,000 2.5121 109,870 D 35,774,761 35,774,761 10.1450 362,935 10.1450 362,670 E 29,887,357 29,887,357 12.4827 373,075 12.4827 372,733 F 48,000,000 48,000,000 12.5000 600,000 12.5000 599,284 G 44,406,442 43,116,119 15.5000 668,300 15.5000 668,044 414,033,220 412,742,897 $ 2,191,086 $ 2,179,739 In February 2021, we authorized 244.3 million shares of Series G-1 redeemable convertible preferred stock in connection with our convertible notes. No shares of Series G-1 were issued or outstanding immediately prior to our IPO. Immediately prior to our IPO, all outstanding shares of redeemable convertible preferred stock were converted into shares of our Class A common stock on a one-to-one basis and their carrying value of $2.18 billion was reclassified into stockholders' equity. As such, there were no shares of redeemable convertible preferred stock authorized or issued and outstanding as of September 30, 2021. Preferred Stock Pursuant to our Charter, our Board of Directors may issue shares of our preferred stock in one or more series and, subject to the applicable law of the State of Delaware, our Board of Directors may set the powers, rights, preferences, qualifications, limitations and restrictions of such preferred stock. Our Board of Directors has the power to issue our preferred stock with voting, conversion and exchange rights that could negatively affect the voting power or other rights of our common stockholders, and our Board of Directors could take that action without stockholder approval. The issuance of our preferred stock could delay or prevent a change in control of Robinhood. As of September 30, 2021, no terms of the preferred stock have been designated, no shares of preferred stock were outstanding and we have no present plan to issue any shares of preferred stock. Common Stock Voting Rights We have three classes of common stock: Class A, Class B, and Class C. Holders of our Class A common stock are entitled to one vote per share on all matters to be voted upon by our stockholders, holders of our Class B common stock are entitled to 10 votes per share on all matters to be voted upon by our stockholders and, except as otherwise required by applicable law, holders of our Class C common stock are not entitled to vote on any matter to be voted upon by our stockholders. The holders of our Class A common stock and Class B common stock vote together as a single class, unless otherwise required by our Charter or applicable law. Conversion of Class B Common Stock Each share of Class B common stock is convertible at any time at the option of the holder into one share of Class A common stock. All Class B common stock will automatically convert (as a class) into Class A common stock upon the earliest of (i) the date and time specified by the affirmative vote of the holders of at least 80% of the then-outstanding shares of Class B common stock, voting separately as a class, (ii) the date fixed by our Board of Directors that is no less than 61 days and no more than 180 days following the date on which the number of then-outstanding shares of Class B common stock represents less than 5% of the aggregate number of shares of Class A common stock and Class B common stock then outstanding, (iii) the date fixed by our Board of Directors that is no less than 61 days and no more than 180 days following the date that (A) each founder is no longer providing services to our Company as an officer, employee or consultant and (B) each founder is not a director of our Company as a result of a voluntary resignation by such founder from our Board of Directors or as a result of a written request or agreement by such founder not to be renominated as a director of our Company at an annual or special meeting of stockholders, (iv) nine months after the death or total disability of both founders (subject to a delay of up to 18 months as may be approved by a majority of our independent directors) or (v) August 2, 2036, the date that is 15 years from the completion of our IPO (the “Final Conversion Date”). Shares of Class B common stock will also automatically convert into shares of Class A common stock upon sale or transfer except for certain permitted transfers described in our Charter. In addition, each share of Class B common stock held by a stockholder who is a natural person, or held by permitted transferees or permitted entities of such natural person (each as described in our Charter) will automatically convert into shares of Class A common stock nine months following the death or total disability of such natural person (subject to a delay of up to 18 months as may be approved by a majority of our independent directors). Notwithstanding the foregoing, in the event such natural person is a founder, to the extent (i) a person designated by such founder and approved by a majority of the independent directors then in office or (ii) the other founder, in each case, has or shares voting control over the shares of Class B common stock held by the deceased or disabled founder, such shares will be treated as being held of record by such person or other founder and will not convert into shares of Class A common stock as a result of such founder’s death or total disability. Conversion of Class C Common Stock Upon the conversion or exchange of all outstanding shares of our Class B common stock into shares of Class A common stock, each outstanding share of Class C common stock will convert automatically into one share of Class A common stock on the date or time fixed by our Board of Directors. Dividend Rights Subject to the rights of any holders of our preferred stock, the holders of our common stock will be entitled to receive ratable dividends, if any, as may be declared from time to time by our Board of Directors out of funds legally available for the payment of dividends. Right to Receive Liquidation Distributions If we liquidate, dissolve or wind up, after all liabilities and, if applicable, the holders of each series of our preferred stock have been paid in full, the holders of our common stock will be entitled to share ratably in all remaining assets. No Preemptive or Similar Rights Our common stock has no preemptive or conversion rights or other subscription rights. No redemption or sinking fund provisions are applicable to our common stock. The rights, preferences and privileges of the holders of our common stock are subject to, and may be adversely affected by, the rights of the holders of shares of any series of our preferred stock that we may designate and issue in the future. Warrants As of September 30, 2021, warrants outstanding consist of warrants to purchase 14.3 million shares of Class A common stock with a strike price of $26.60 per share. The warrants expire on February 12, 2031. The warrants can be settled in cash or in net shares at the holder’s option. In the event of a cash settlement, the number of equity securities the holder will receive is equal to their maximum purchase amount divided by the strike price. In aggregate, the maximum purchase amount of all warrants is $379.8 million. As of September 30, 2021, the warrants have not been exercised and are included as a component of additional paid in capital on the unaudited condensed consolidated balance sheets. Equity Incentive Plans Amended and Restated 2013 Stock Plan and 2020 Equity Incentive Plan Our Amended and Restated 2013 Stock Plan, as amended (the “2013 Plan”), and our 2020 Equity Incentive Plan, as amended (the “2020 Plan”), provided for share-based awards to eligible participants, granted as incentive stock options (“ISOs”), non-statutory stock options (“NSOs”), restricted stock units ("RSUs"), stock appreciation rights (“SARs”) or restricted stock awards (“RSAs”). Options could be granted with an exercise price per share not less than the fair market value at the date of grant. Options granted generally vest over a four-year term from the date of grant, at a rate of 25% after one year, then monthly on a straight-line basis thereafter. Generally, options granted are exercisable for up to ten years from the date of grant. RSUs granted generally vest quarterly on a straight-line basis and expire seven years from the date of grant. Our 2013 Plan was terminated in connection with adoption of our 2020 Plan, and our 2020 Plan was terminated in connection with the adoption of our 2021 Plan (defined below) but any awards outstanding under our 2013 Plan and 2020 Plan remain in effect in accordance with their terms. Any shares that were or otherwise would become available for grant under the 2013 Plan or 2020 Plan will be available for grant under the 2021 Plan. No new awards may be granted under our 2013 Plan or 2020 Plan. 2021 Omnibus Incentive Plan In June 2021, our Board of Directors and our stockholders approved and adopted our 2021 Omnibus Incentive Plan (the “2021 Plan”). Our 2021 Plan became effective on July 27, 2021, immediately prior to the effective date of the Final Prospectus. Our 2021 Plan provides for the grant of share-based awards (such as options, including ISOs and NSOs, SARs, RSAs, RSUs, performance units, and other equity-based awards) and cash-based awards. The aggregate number of shares available for grant under the 2021 Plan was equal to approximately 14% of the number of shares of our common stock (of all classes) outstanding immediately upon the closing of the IPO. Thereafter, any shares subject to awards under the 2013 Plan, the 2020 Plan, or the 2021 Plan that expire or terminate or are forfeited to or repurchased by the Company will again become available under the 2021 Plan. In addition, the number of shares available under the 2021 Plan will automatically increase on the first day of each calendar year beginning on January 1, 2022 and ending with (and including) January 1, 2031. Such annual increase will be equal to the lesser of (i) 5% of the outstanding shares of all classes of our common stock on the last day of the immediately preceding calendar year and (ii) such number of shares determined by the Board of Directors. As of September 30, 2021, an aggregate of 316.7 million shares have been authorized for issuance under the 2013 Plan, 2020 Plan, and 2021 Plan, of which 62.9 million shares have been issued under the plans, 127.9 million shares were reserved for issuance upon the exercise or settlement of outstanding equity awards under the plans, and 125.9 million shares remained available for new grants under the 2021 Plan. Stock Option Activity A summary of stock option activity for the nine months ended September 30, 2021 is as follows: Number of Shares Weighted-Average Exercise Price Weighted- Average Remaining Life Total Intrinsic Value (in thousands) Balance at December 31, 2020 21,543,828 $ 2.19 6.52 $ 304,590 Granted during the period — — Exercised during the period (5,819,965) 2.02 Cancelled and forfeited during the period (276,657) 4.51 Balance at September 30, 2021 15,447,206 $ 2.21 5.66 $ 615,827 Options vested and expected to vest at September 30, 2021 15,447,206 $ 2.21 5.66 $ 615,827 Options exercisable at September 30, 2021 14,040,377 $ 1.79 5.49 $ 565,754 Time-Based RSUs We grant RSUs that vest upon the satisfaction of a time-based service condition, and prior to our IPO, a performance-based condition (“Time-Based RSUs”). The following table summarizes the activity related to our Time-Based RSUs for the nine months ended September 30, 2021: Number of RSUs Weighted- average grant date fair value Unvested at December 31, 2020 47,711,649 $ 10.84 Granted 28,635,488 40.76 Vested (23,261,472) 17.94 Forfeited (2,442,812) 24.37 Unvested at September 30, 2021 50,642,853 $ 32.20 The fair value as of the respective vesting dates of Time-Based RSUs that vested during the three and nine months ended September 30, 2021 was $898.8 million. No Time-Based RSUs vested during 2020. Market-Based RSUs We granted 27.7 million market-based RSUs to our co-founders, Mr. Tenev and Mr. Bhatt, during the year ended December 31, 2019 that were modified in May 2021 (the “2019 Market-Based RSUs”). The awards become eligible to vest based on (i) achievement of share price targets considered market vesting conditions (approximately 5.6 million, 8.3 million, and 13.8 million RSUs vest upon achievement of share price targets of $30.45, $50.75, and $101.50, respectively, with the stock price targets initially measured based on our IPO price and, for all RSUs that did not vest upon IPO, measured based on the average of our Class A common stock’s volume weighted average trading price for each trading day during any 60 consecutive trading days), and (ii) continuous employment by each recipient through the vesting date, which is considered a service condition. Once the number of 2019 Market-Based RSUs eligible to vest has been determined based on the satisfaction of the 2019 Market-Based RSU share price target (the “Eligible 2019 Market-Based RSUs”), half of those Eligible 2019 Market-Based RSUs will immediately vest and be settled and the remaining half vest according to a quarterly time-based vesting condition, which is satisfied based on three-month service periods retroactive to August 1, 2018 through August 1, 2024, subject to continued service on each such vesting date during that period. A total of approximately 5.6 million of the 2019 Market-Based RSUs became Eligible 2019 Market-Based RSUs in connection with our IPO. Of these, a total of 4.0 million vested immediately upon our IPO and the remainder will be subject to vesting in equal installments on each August 1, November 1, February 1 and May 1 through August 1, 2024. Prior to the modification, any tranche of 2019 Market-Based RSUs that had not achieved its share price target upon IPO would have been forfeited. The modification allows the awards to continue to be measured against the same price targets as were outlined in the original 2019 grant though December 31, 2025. The amendment to the 2019 Market-Based RSUs was determined to be a modification of a market condition, therefore, we estimated the pre-modification and post-modification fair value of the awards to determine the incremental fair value generated by the modification. To value the awards, we used a model based on multiple stock price paths developed through the use of a Monte Carlo simulation that incorporates into the valuation the possibility that the price targets might not be satisfied. If the price targets are met sooner than the derived service period, we will adjust our share-based compensation expense to reflect the cumulative expense associated with the vested award. The 2019 Market-Based RSUs had a weighted-average grant date fair value of $0.29 per RSU. Upon modification, the weighted-average incremental fair value of the 2019 Market-Based RSUs was $21.01 per RSU. In May 2021, we granted 35.5 million additional market-based RSUs to Mr. Tenev and Mr. Bhatt (the “2021 Market-Based RSUs” and together with the 2019 Market-Based RSUs, “Market-Based RSUs”) with a weighted-average grant date fair value of $22.68 per RSU. These awards vest based on (i) achievement of share price targets, considered a market condition, over a period of 8 years from issuance (4.5 million will vest upon achievement of each of the $120 and $150 share price targets, and 5.3 million will vest upon achievement of each of the $180, $210, $240, $270, and $300 share price targets, in each case, measured using the average of the volume weighted average trading price for each trading day during any 60 consecutive trading days ) , and (ii) continuous employment by each recipient through the vesting date , which is considered a service condition. We estimated the grant date fair value of the 2021 Market-Based RSUs using a model based on multiple stock price paths developed through the use of a Monte Carlo simulation that incorporates into the valuation the possibility that the price targets might not be satisfied. If the price targets are met sooner than the derived service period, we will adjust our share- based compensation expense to reflect the cumulative expense associated with the vested award. As of September 30, 2021, none of the 2021 Market-Based RSUs had vested. The following table summarizes the activity related to our Market-Based RSUs for the nine months ended September 30, 2021: Number of RSUs Weighted- average grant date fair value Unvested at December 31, 2020 27,663,658 $ 0.29 Granted 35,520,000 22.68 Vested (4,149,548) 2.34 Forfeited — — Unvested at September 30, 2021 59,034,110 $ 23.46 The fair value as of the respective vesting dates of Market-Based RSUs that vested during the three and nine months ended September 30, 2021 was $157.4 million. No Market-Based RSUs vested during 2020. 2021 Employee Share Purchase Plan In June 2021, our Board of Directors and our stockholders approved and adopted the 2021 Employee Share Purchase Plan (the “ESPP”). Our ESPP became effective on July 27, 2021, immediately prior to the effective date of the Final Prospectus. The purpose of the ESPP is to enable eligible employees to purchase shares of our common stock at a discount through payroll deductions of up to 15% of their eligible compensation up to the statutory maximum. The purchase price is equal to 85% of the fair market value of a share of our common stock on the first date of an offering or the date of purchase, whichever is lower. The aggregate number of shares reserved for issuance under the ESPP was equal to approximately 2% of the number of shares of our common stock (of all classes) outstanding upon the closing of the IPO. The number of shares available under our ESPP will automatically increase on the first day of each calendar year beginning on January 1, 2022 and ending with (and including) January 1, 2031. Such annual increase will be equal to the lesser of (i) 1% of the outstanding shares of all classes of our common stock on the last day of the immediately preceding calendar year and (ii) such number of shares determined by the Board of Directors. No more than 200.0 million shares of common stock may be issued under our ESPP. As of September 30, 2021 , no purchases had been made and approximately 17.0 million shares were available for future issuance under the ESPP. Share-Based Compensation The following table presents share-based compensation in our unaudited condensed consolidated statements of operations for the periods indicated: Three Months Ended Nine Months Ended (in thousands) 2020 2021 2020 2021 Brokerage and transaction $ 6 $ 6,405 $ 18 $ 6,417 Technology and development 992 502,748 3,532 504,773 Operations 5 16,410 23 16,416 Marketing 40 40,966 55 41,044 General and administrative 528 677,785 1,720 685,798 Total $ 1,571 $ 1,244,314 $ 5,348 $ 1,254,448 Included in the table above, we recorded share-based compensation expense of $907.3 million related to Time-Based RSUs, $360.9 million related to Market-Based RSUs, and $1.8 million related to the ESPP during the three and nine months ended September 30, 2021. No share-based compensation was recorded in 2020 related to Time-Based RSUs, Market-Based RSUs, or the ESPP. We capitalized share-based compensation expense related to internally developed software of nil and $0.6 million during the three and nine months ended September 30, 2020, and $19.9 million and $20.0 million during the three and nine months ended September 30, 2021. In March 2021, we modified certain Time-Based RSUs of approximately 500 employees to remove the one-year vesting cliff, considered to be an improbable to improbable modification. The modified RSUs were revalued at the modification date, and the modified grant date fair value of the awards of $39.75 per share was used to calculate share-based compensation expense.

NET LOSS PER SHARE

NET LOSS PER SHARE	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
NET LOSS PER SHARE	NOTE 14: NET LOSS PER SHARE We present net loss per share using the two-class method required for multiple classes of common stock. The rights, including the liquidation and dividend rights, of the holders of Class A common stock and Class B common stock are identical, except with respect to voting. As the liquidation and dividend rights are identical for Class A common stock and Class B common stock, the undistributed earnings are allocated on a proportionate basis and the resulting loss per share will, therefore, be the same for both Class A common stock and Class B common stock on an individual or combined basis. The following table presents the calculation of basic and diluted loss per share: (in thousands, except per share data) Three Months Ended Nine Months Ended 2020 2021 2020 2021 Net loss $ (10,661) $ (1,316,697) $ (5,579) $ (3,263,165) Less: allocation of earnings to participating securities — — — — Net loss attributable to common stockholders $ (10,661) $ (1,316,697) $ (5,579) $ (3,263,165) Weighted-average common stock outstanding - basic 225,997,444 638,168,188 225,299,165 368,518,894 Dilutive effect of stock options and unvested shares — — — — Weighted-average common stock outstanding - diluted 225,997,444 638,168,188 225,299,165 368,518,894 Net loss per share attributable to common stockholders: Basic $ (0.05) $ (2.06) $ (0.02) $ (8.85) Diluted $ (0.05) $ (2.06) $ (0.02) $ (8.85) The following potential common shares were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive or issuance of such shares is contingent upon the satisfaction of certain conditions which were not satisfied by the end of the period: Three Months Ended Nine Months Ended 2020 2021 2020 2021 Redeemable convertible preferred stock 412,742,897 — 412,742,897 — RSUs 65,598,613 112,492,359 65,598,613 112,492,359 Stock options 24,836,871 15,447,206 24,836,871 15,447,206 Unvested shares 306,966 65,435 306,966 65,435 Warrants — 14,278,034 — 14,278,034 ESPP shares — 93,738 — 93,738 Total anti-dilutive securities 503,485,347 142,376,772 503,485,347 142,376,772

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	9 Months Ended
	Sep. 30, 2021
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	NOTE 15: RELATED PARTY TRANSACTIONS Related party transactions may include any transaction between entities under common control or with a related party. We have defined related parties as members of the Board of Directors, executive officers, principal owners of our outstanding stock and any immediate family members of each such related party, as well as any other person or entity with significant influence over our management or operations and any other affiliates. In February 2021, we issued two tranches of convertible notes and granted to each purchaser of the Tranche I convertible notes a warrant to purchase equity securities - see Note 12. Two of the Tranche I investors were related parties prior to the completion of our IPO. Their respective aggregate outstanding principal and accrued interest of their convertible notes automatically converted into shares of Class A common stock upon the closing of our IPO

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	9 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	NOTE 16: COMMITMENTS & CONTINGENCIES Commitments Leases Our operating leases are comprised of office facilities, with the most significant leases relating to our corporate headquarters in Menlo Park and our office in New York City. Our leases have remaining terms of 1 to 12 years, and many leases include one or more options to renew. We do not assume renewals in our determination of the lease term unless the renewals are deemed to be reasonably assured at lease commencement. We do not have any finance leases. As of December 31, 2020 and September 30, 2021 we had $49.2 million and $158.1 million of operating right-of-use assets included as non-current assets other current liabilities other non-current liabilities As of September 30, 2021, we have an executed operating lease that has not yet commenced for office facilities that will commence by December 2021. Under the terms of the lease, we will have the right to construct tenant improvements to the underlying asset upon commencement. The components of lease expense were as follows: Three Months Ended Nine Months Ended (in thousands) 2020 2021 2020 2021 Fixed operating lease costs $ 2,971 $ 7,115 $ 8,034 $ 15,905 Variable operating lease costs 791 1,232 2,218 3,684 Short-term lease costs 266 457 579 1,067 Total lease costs $ 4,028 $ 8,804 $ 10,831 $ 20,656 Fixed operating lease costs primarily consist of monthly base rent amounts due. Variable operating lease costs are primarily related to payments made to our landlords for common area maintenance, property taxes, insurance, and other operating expenses. Other information related to our operating leases was as follows: December 31, September 30, 2020 2021 Weighted-average remaining lease term 5.41 years 7.46 years Weighted-average discount rate 7.02 % 6.27 % Cash flows related to leases were as follows: Nine Months Ended (in thousands) 2020 2021 Operating cash flows: Payments for operating lease liabilities $ 11,238 $ 240 Supplemental cash flow data: Lease liabilities arising from obtaining right-of-use assets $ 14,991 $ 96,519 Future minimum lease payments under non-cancellable operating leases (with initial lease terms in excess of one year) as of September 30, 2021 are as follows: (in thousands) Remainder of 2021 $ 5,807 2022 32,646 2023 34,821 2024 33,355 2025 32,436 Thereafter 125,724 Total undiscounted lease payments 264,789 Less: imputed interest (44,385) Less: lease incentives (12,682) Less: leases executed but not yet commenced (53,185) Total lease liabilities $ 154,537 Contingencies Legal and Regulatory Matters The securities industry is highly regulated and many aspects of our business involve substantial risk of liability. In past years, there has been an increasing incidence of litigation involving the brokerage industry, including class action suits that generally seek substantial damages. Damages may include, in some cases, punitive damages. Compliance and trading problems that are reported to federal and state regulators, exchanges, or other self-regulatory organizations (“SROs”) by dissatisfied customers are investigated by such regulatory bodies, and, if pursued by such regulatory body or such customers, may rise to the level of arbitration or disciplinary action. We are also subject to periodic regulatory audits and inspections. Like other brokerage firms, we have been named as a defendant in lawsuits and from time to time we have been threatened with, or named as a defendant in arbitrations and administrative proceedings. The outcomes of legal and regulatory matters are inherently uncertain and some of these matters may result in adverse judgments or awards, including penalties, injunctions or other relief, and we may also determine to settle a matter because of the uncertainty and risks of litigation. We record an accrual for legal and regulatory matters at management’s best estimate when we determine that it is probable that a loss has been incurred and the amount of the loss can be reasonably estimated. If the reasonable estimate is a range and no amount within that range is considered a better estimate than any other amount, an accrual is recorded based on the bottom amount of the range. Amounts accrued for legal and regulatory contingencies in the aggregate were $39.5 million as of December 31, 2020 and $33.1 million as of September 30, 2021. With respect to matters discussed below for which no accrual has been made or which have a potential loss in excess of amounts accrued, we believe, based on current knowledge, that any losses or ranges of losses (in excess of amounts accrued, if applicable) as of September 30, 2021 that are reasonably possible and can be reasonably estimated will not, in the aggregate, have a material adverse effect on our business, financial position, operating results, or cash flows. However, for many of the matters disclosed below, particularly those in early stages, we cannot reasonably estimate the reasonably possible loss (or range of loss), if any. In addition, the ultimate outcome of legal proceedings involves judgments, estimates, and inherent uncertainties and cannot be predicted with certainty. Any judgment entered against us, or any adverse settlement, could materially and adversely impact our business, financial condition, operating results, and cash flows. We might also incur substantial legal fees, which are expensed as incurred, in defending against legal and regulatory claims. Described below are certain historical matters as well as certain pending matters in which there is at least a reasonable possibility that a material loss could be incurred. We intend to continue to defend the pending matters vigorously. Best Execution, Payment for Order Flow, and Sources of Revenue Matters In May 2019, the SEC’s Division of Enforcement (“Enforcement Division”) commenced an investigation into RHF’s best execution and payment for order flow (“PFOF”) practices, as well as statements concerning its sources of revenue, including the fact that, in FAQs on our website describing how it made money, and in certain communications with customers addressing the same issue, RHF had omitted PFOF when it described its revenue sources. On December 17, 2020, RHF, on a neither admit nor deny basis, consented to the entry of an SEC order (i) requiring RHF to cease and desist from committing or causing any violations and any future violations of Sections 17(a)(2) and 17(a)(3) of the Securities Act and Section 17(a) of the Exchange Act and Rule 17a-4 thereunder; (ii) censuring RHF; and (iii) requiring RHF to pay a $65 million civil penalty in December 2020. RHF paid the $65 million penalty in cash and also agreed to engage an independent compliance consultant. Beginning in December 2020, seven putative securities fraud class action lawsuits have been filed against RHM, RHF and/or RHS. The lawsuits generally allege that we violated the duty of best execution and misled putative class members by publishing misleading statements and omissions in customer communications relating to the execution of trades and revenue sources (including PFOF). One of the cases was voluntarily dismissed without prejudice and five cases have been consolidated under the caption In re Robinhood Order Flow Litigation in the United States District Court for the Northern District of California. An amended consolidated complaint was filed in In re Robinhood Order Flow Litigati on in May 2021, asserting a claim for violations of Section 10(b) of the Securities Exchange Act of 1934 and various state law causes of action, and seeking damages, restitution, disgorgement and other relief. In June 2021, we filed a motion to dismiss the amended consolidated complaint and a motion to deny class certification, which remain pending. The final lawsuit, filed in the United States District Court for the Southern District of Florida against RHF as well as several market makers, alleges that RHF breached its fiduciary duties to customers and that the market makers aided and abetted RHF’s breach. In October 2021, RHF and the market-maker defendants moved to transfer the case to the Northern District of California, or in the alternative, to dismiss the complaint. March 2020 Outages Beginning in March 2020, 15 putative class actions and one individual action were filed against RHM, RHF and RHS in state and federal district courts relating to service outages on our stock trading platform on March 2-3, 2020 and March 9, 2020 (the “March 2020 Outages”). One of the putative class actions and the individual action were voluntarily dismissed following settlements between the parties. Thirteen of the remaining putative class actions have been consolidated as In re Robinhood Outage Litigation in the United States District Court for the Northern District of California. The one remaining putative class action has been stayed by agreement of the parties. The lawsuits generally allege that putative class members were unable to execute trades during the March 2020 Outages because our platform was inadequately designed to handle customer demand and RHM, RHF, and RHS failed to implement appropriate backup systems. The lawsuits include, among other things, claims for breach of contract, negligence, gross negligence, breach of fiduciary duty, unjust enrichment and violations of certain California consumer protection statutes. The lawsuits generally seek damages, restitution, and/or disgorgement, as well as declaratory and injunctive relief. In October 2021, plaintiffs filed a motion for class certification, which RHM, RHF, and RHS intend to oppose. We also received notice that approximately 1,600 jointly represented customers may pursue arbitration of individual claims against us arising out of the March 2020 Outages, in addition to other alleged system outages. In September 2021, approximately 400 of those customers initiated an arbitration through Financial Industry Regulatory Authority (“FINRA”) Dispute Resolution. The SEC Division of Examinations (“Examinations Division”) conducted an examination and identified a deficiency, to which RHF responded, with respect to RHF’s creation of a reasonably designed business continuity plan. In addition, FINRA conducted an investigation and certain state regulatory authorities are conducting investigations, regarding the March 2020 Outages and related procedures. RHF and RHS are cooperating with the requests from these regulators and RHF entered into a settlement with FINRA with respect to certain matters. See “—FINRA Multi-Matter Settlement” below for more information. Options Trading and Related Customer Communications and Displays The SEC Examinations Division conducted an examination and identified deficiencies, to which RHF responded, with respect to account takeovers, identity theft in connection with new account opening, processes for approving or rejecting certain accounts for options trading and customer support response times. Certain state regulatory authorities are conducting investigations regarding RHF’s options trading and related customer communications and displays and options trading approval process. RHF is cooperating with the regulators’ requests. FINRA also conducted an investigation and reached a settlement with RHF regarding the same options trading issues . In February 2021, the family of Alexander Kearns, a Robinhood customer who traded options, filed a lawsuit in the Superior Court of the State of California, County of Santa Clara, against RHF, RHS and RHM in connection with Mr. Kearns’s death by suicide in June 2020. This matter was dismissed with prejudice following a settlement between the parties . FINRA Multi-Matter Settlement On June 30, 2021, RHF resolved with FINRA, on a no admit, no deny basis, certain investigations and examinations, including investigations into systems outages, RHF’s options product offering, and margin-related communications with customers, among others. The resolution did not address all the matters FINRA is investigating, including those relating to the Early 2021 Trading Restrictions (as defined below), account takeovers and anti-money laundering issues, RHS’s fractional shares trade reporting, customer support procedures or customer arbitration agreements. RHF and RHS will continue to cooperate with FINRA on these matters. The resolution involved the following components: (i) charges of violations of FINRA rules; (ii) a fine of $57.0 million; (iii) customer restitution of approximately $12.6 million; (iv) a censure; and (v) engagement of an independent consultant. In July 2021, we paid the $57.0 million penalty in cash. As of September 30, 2021, we had paid substantially all of the customer restitution. RHC Anti-Money Laundering, Cybersecurity, and Other Issues In July 2020, the New York State Department of Financial Services (“NYDFS”) issued a report of its examination of RHC citing a number of “matters requiring attention” focused primarily on anti-money laundering and cybersecurity-related issues. The matter was subsequently referred to the NYDFS’s Consumer Protection and Financial Enforcement Division for investigation. In March 2021, the NYDFS informed RHC of alleged violations of applicable (i) anti-money laundering and New York Banking Law requirements, including the failure to maintain and certify a compliant anti-money laundering program, (ii) notification provisions under RHC’s Supervisory Agreement with the NYDFS, and (iii) cybersecurity and virtual currency requirements, including deficiencies in our policies and procedures regarding risk assessment, lack of an adequate incident response and business continuity plan, and deficiencies in our application development security. RHC and the NYDFS have reached a settlement in principle with respect to these allegations, subject to final documentation, in connection with which, among other things, RHC expects to pay a monetary penalty and engage a monitor. Additionally, in April 2021, the California Attorney General’s Office issued an investigative subpoena to RHC, seeking documents and answers to interrogatories about RHC’s trading platform, business and operations, application of California’s commodities regulations to RHC and other matters. RHC is cooperating with this investigation. We cannot predict the outcome of this investigation or any consequences that might result from it. Account Takeovers In November 2020, FINRA Enforcement commenced an investigation into RHF concerning account takeovers, or circumstances under which an unauthorized actor successfully logs into a customer account, as well as anti-money laundering and cybersecurity issues. Since February 2021, RHF has received requests for documents and information from the SEC’s Enforcement Division in connection with its investigation into account takeovers and, more recently, suspicious activity report filings and issues related to the Electronic Funds Transfer Act. Additionally, state regulators, including the New York Attorney General’s Office, have opened inquiries into RHM, RHF and RHC related to account takeovers. RHM, RHF and RHC are cooperating with these investigations and inquiries. The SEC’s Examinations Division also conducted an examination and identified deficiencies, to which RHF responded, with respect to, among other things, account takeovers and identity theft in connection with new account opening. In January 2021, a putative class action was filed in California Superior Court (Santa Clara County) against RHF and RHS by Siddharth Mehta, purportedly on behalf of approximately 2,000 Robinhood customers whose accounts were allegedly accessed by unauthorized users. RHF and RHS removed this action to the United States District Court for the Northern District of California. Plaintiffs generally allege that RHF and RHS breached commitments made and duties owed to customers to safeguard customer data and assets and seek monetary damages and injunctive relief. In March 2021, RHF and RHS filed a motion to dismiss the amended complaint, which was granted in part and denied in part in May 2021. A second amended complaint was filed by the plaintiffs in May 2021. In June 2021, RHF and RHS filed a motion to dismiss the second amended complaint, which was granted in part and denied in part in September 2021 . Massachusetts Securities Division Matter In December 2020, the Enforcement Section of the Massachusetts Securities Division (“MSD”) filed an administrative complaint against RHF, which stems from an investigation initiated by the MSD in July 2020. The complaint alleges three counts of Massachusetts securities law violations regarding alleged unethical and dishonest conduct or practices, failure to supervise, and failure to act in accordance with the Massachusetts fiduciary duty standard, which became effective on March 6, 2020 and had an effective enforcement date beginning September 1, 2020. Among other things, the MSD alleges that our product features and marketing strategies, outages, and options trading approval process constitute violations of Massachusetts securities laws. The initial complaint seeks, among other things, injunctive relief (seeking a permanent cease and desist order), censure, unspecified restitution, unspecified disgorgement, the appointment of an independent consultant and an unspecified administrative fine. The amended complaint also seeks revocation of RHF's license to operate in Massachusetts. If RHF were to lose its license to operate in Massachusetts, we would not be able to acquire any new customers in Massachusetts, and we expect that our current customers in Massachusetts would be unable to continue utilizing any of the services or products offered on our platform (other than closing their positions) and that we may be forced to transfer such customers’ accounts to other broker-dealers. Additionally, revocation of RHF’s Massachusetts license could trigger similar disqualification or proceedings to restrict or condition RHF’s registration by other state regulators. A revocation of RHF’s license to operate in Massachusetts would result in RHF and RHS being subject to statutory disqualification by FINRA and the SEC, which would then result in RHF needing to obtain relief from FINRA subject to SEC review in order to remain a FINRA member and RHS possibly needing relief from FINRA or other SROs. In April 2021, RHF filed a complaint and motion for preliminary injunction and declaratory relief in Massachusetts state court seeking to enjoin the MSD administrative proceeding and challenging the legality of the Massachusetts fiduciary duty standard. In May 2021, the state court denied RHF’s motion for a preliminary injunction, finding that RHF would not suffer irreparable harm if MSD proceeded with the pending administrative action, but determined that RHF may seek a declaration that the disputed regulation is unlawful without first exhausting its remedies in the administrative action. In June 2021, the state court declined to stay the entire matter pending resolution of the administrative proceeding, finding that RHF is entitled to have the state court decide certain of its challenges to the Massachusetts fiduciary standard without waiting for the MSD to complete its administrative proceeding. In September 2021, the parties filed cross-motions for partial judgment on the pleadings and those motions are pending. RHF has engaged in settlement discussions with the MSD at certain times since the MSD filed its initial complaint, however, such negotiations have not been successful and RHF is currently not engaged in any such settlement discussions with the MSD. Pinchasov v. Robinhood Financial LLC In November 2020, plaintiff Shterna Pinchasov filed a putative class action in the Circuit Court of the 11th Judicial Circuit of Florida in and for Miami-Dade County asserting claims of negligence and breach of fiduciary duty based on allegations that RHF failed to prevent customers from using its interface for stocks that were subject to a “T1 Halt,” and seeking damages. Securities exchanges, such as the New York Stock Exchange and the Nasdaq Stock Market, have the authority to halt and delay trading in a security, and a “T1 Halt” (or regulatory halt) may occur pending the release of material news about a company. RHF removed this action to the U.S. District Court for the Southern District of Florida. In August 2021, plaintiff filed a motion for class certification. In September 2021, the court denied plaintiff’s motion, and a subsequent motion for reconsideration. In October 2021, plaintiff filed a petition for permission to appeal the denial of class certification, which RHF opposed. Text Message Litigation In October 2019, a putative class action was filed by Isaac Gordon against RHF and RHM in the Superior Court for the State of Washington, County of Spokane. The complaint alleged that RHF and RHM initiated or assisted in the transmission of commercial electronic text messages to Washington State residents without their consent in violation of Washington State law. The action was removed to the Eastern District of Washington. In January 2021, the court granted the plaintiff’s motion for class certification. In June 2021, RHF filed a motion to decertify the class and disqualify class counsel. In July 2021, the court granted RHF’s motion to decertify the class, denied the motion to disqualify class counsel, and remanded the case to state court. In August 2021, a new, substantially similar putative class action was filed by Cooper Moore against RHF in the U.S. District Court for the Northern District of California. In September 2021, RHF filed motions to transfer the case to the Western District of Washington and to dismiss the complaint. In October 2021, the court granted the motion to transfer the case and declined to rule on the motion to dismiss. Early 2021 Trading Restrictions Matters Beginning on January 28, 2021, due to increased deposit requirements imposed on RHS by the NSCC in response to unprecedented market volatility, particularly in certain securities, RHS temporarily restricted or limited its customers’ purchase of certain securities, including GameStop Corp. and AMC Entertainment Holdings, Inc., on our platform (the “Early 2021 Trading Restrictions”). Approximately 55 putative class actions and four individual actions have been filed against one or more of RHM, RHF and RHS in various federal and state courts relating to the Early 2021 Trading Restrictions. In April 2021, the Judicial Panel on Multidistrict Litigation entered an order centralizing the federal cases identified in a motion filed by certain plaintiffs to transfer and coordinate or consolidate the actions filed in connection with the Early 2021 Trading Restrictions in the United States District Court for the Southern District of Florida captioned In re: January 2021 Short Squeeze Trading Litigatio n (the “MDL”). In May 2021, the court appointed interim lead plaintiffs’ counsel for certain claims. In July 2021, interim lead plaintiffs’ counsel filed two consolidated complaints seeking monetary damages: the first complaint asserts a federal antitrust claim; the second complaint asserts negligence and breach of fiduciary duty claims. In August 2021, defendants moved to dismiss both of these consolidated complaints. In September 2021, interim lead plaintiffs’ counsel filed an amended consolidated complaint against RHM, RHF and RHS for the negligence and breach of fiduciary duty claims, adding new claims for tortious interference with contract and business relationship, civil conspiracy and breach of the covenant of good faith and fair dealing and implied duty of care. In October 2021, RHM, RHF and RHS moved to dismiss the amended consolidated complaint for the state law claims. Additionally, the court appointed a lead plaintiff and lead counsel for federal securities claims pursuant to the Private Securities Litigation Reform Act of 1995, which will proceed separately. RHM, RHF, RHS and our Co-Founder and CEO, Vladimir Tenev, among others, have received requests for information, and in some cases, subpoenas and requests for testimony, related to investigations and examinations of the Early 2021 Trading Restrictions from the United States Attorney’s Office for the Northern District of California (“USAO”), the U.S. Department of Justice, Antitrust Division, the SEC staff, FINRA, the New York Attorney General’s Office, other state attorneys general offices and a number of state securities regulators. Also, a related search warrant was executed by the USAO to obtain Mr. Tenev’s cell phone. There have been several inquiries based on specific customer complaints. We have also received inquiries from the SEC’s Division of Examinations and FINRA related to employee trading in certain securities that were subject to the Early 2021 Trading Restrictions, including GameStop Corp. and AMC Entertainment Holdings, Inc., during the week of January 25, 2021. These matters include inquiries related to whether any employee trading in these securities may have occurred after the decision to impose the Early 2021 Trading Restrictions and before the public announcement of the Early 2021 Trading Restrictions on January 28, 2021. FINRA has also requested information about policies, procedures, and supervision related to employee trading generally. In addition, we have received information and testimony requests from certain committees and members of the U.S. Congress and Mr. Tenev, among others, has provided or will provide testimony with respect to the Early 2021 Trading Restrictions. We are cooperating with these investigations and examinations. “For You” Document Request In May 2021, the SEC’s Enforcement Division issued a request to RHM and RHF seeking documents and information related to the “For You” feature, which was available in the past on our website only and is not currently an active product offering on our website or platform, and other features displaying lists of securities to customers. In October 2021, RHF also received a request from FINRA for information about the “For You” feature. Robinhood is cooperating with these inquiries. Dansberger v. Robinhood Securities In June 2021, RHS was sued by Thomas Dansberger on behalf of a putative class in the Circuit Court for Seminole County in Florida seeking monetary damages as well as declaratory and injunctive relief. Mr. Dansberger purports to represent “All Florida residents who purchased Robinhood Gold on or by January 21, 2021 and (b) who were not able to buy or sell cryptocurrencies on January 21, 2021.” The plaintiff alleged that RHS engaged in unfair and deceptive trade practices by advertising and marketing that Robinhood Gold would provide access for customers to buy and sell cryptocurrencies but failed to do so on January 28, 2021 when it allegedly halted the buying and selling of cryptocurrencies. In August 2021, the case was dismissed following a settlement in principle. Registration Requirements for Member Personnel In July 2021, RHF received a FINRA investigative request seeking documents and information related to its compliance with FINRA registration requirements for member personnel, including related to the FINRA non-registration status of Mr. Tenev and Co-Founder and Chief Creative Officer Mr. Bhatt. Robinhood is evaluating this matter and is cooperating with the investigation.

DESCRIPTION OF BUSINESS AND S_2

DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) for interim financial reporting. The condensed consolidated financial statements are unaudited, and in management’s opinion, include all adjustments, including normal recurring adjustments and accruals necessary for a fair presentation of the results for the interim periods presented. Operating results for the periods presented are not necessarily indicative of the results that may be expected for the full fiscal year ended December 31, 2021 or any future period. These unaudited condensed consolidated financial statements should be read in conjunction with the audited annual consolidated financial statements and notes included in our final prospectus for our IPO dated July 28, 2021 and filed with the SEC pursuant to Rule 424(b)(4) under the Securities Act of 1934 on July 30, 2021 (the “Final Prospectus”). There have been no material changes in our significant accounting policies as described in our consolidated financial statements included in our audited annual consolidated financial statements for the year ended December 31, 2020, other than the adoption of the accounting pronouncement as described below in Note 2. The unaudited condensed consolidated financial statements include the accounts of RHM and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated.
Use of Estimates	Use of Estimates The preparation of unaudited condensed consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts in the unaudited condensed consolidated financial statements and accompanying notes. We base our estimates on historical experience, and other assumptions we believe to be reasonable under the circumstances, which together form the basis for making judgments about the carrying values of assets and liabilities. Assumptions and estimates used in preparing our unaudited condensed consolidated financial statements include those related to the determination of allowances for credit losses, the capitalization and estimated useful life of internally developed software, contingent liabilities, useful lives of property and equipment, the incremental borrowing rate used to determine the present value of lease payments, the valuation and recognition of share-based compensation, the valuation of the convertible notes and warrant liability, the valuation and estimated useful lives of acquired intangible assets, uncertain tax positions, accrued liabilities, and the recognition and measurement of current and deferred income tax assets and liabilities. Actual results could differ from these estimates and could have a material adverse effect on our unaudited condensed consolidated financial statements.
Recently adopted accounting pronouncements/Recently issued accounting pronouncements not yet adopted	Recently Adopted Accounting Pronouncements Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity In August 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2020-06, Debt—Debt with Conversion and Other Options and Derivatives and Hedging - Contracts in Entity’s Own Equity . This guidance simplifies the accounting for convertible instruments by reducing the number of accounting models available for convertible debt instruments, amends the accounting guidance for evaluating the classification of certain contracts in an entity’s own equity, and modifies the diluted earnings per share calculations for convertible instruments. The guidance is effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. Early adoption is permitted. We adopted this guidance effective January 1, 2021 using the full retrospective method. The adoption of the guidance did not have a material impact on our unaudited condensed consolidated financial statements. In May 2021, the FASB issued ASU 2021-04, Earnings Per Share, Debt—Modifications and Extinguishments, Compensation—Stock Compensation, and Derivatives and Hedging—Contracts in Entity’s Own Equity . The guidance clarifies modifications or exchanges of freestanding equity-classified written call options (e.g. warrants). The guidance is effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. Early adoption is permitted. We adopted this guidance effective July 1, 2021. The adoption of the guidance did not have a material impact on our unaudited condensed consolidated financial statements. Recently Issued Accounting Pronouncements Not Yet Adopted

DESCRIPTION OF BUSINESS AND S_3

DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
SCHEDULE OF CONCENTRATION OF CREDIT RISK	We derived transaction-based revenues from individual market makers in excess of 10% of total revenues, as follows: Three Months Ended Nine Months Ended 2020 2021 2020 2021 Market maker: Citadel Securities, LLC 33 % 23 % 34 % 21 % Tai Mo Shan Limited (1) 1 % 8 % 2 % 17 % Entities affiliated with Susquehanna International Group, LLP (2) 18 % 13 % 20 % 11 % Entities affiliated with Wolverine Holdings, L.P. (3) 10 % 13 % 10 % 10 % All others individually less than 10% 13 % 16 % 9 % 19 % Total as percentage of total revenue: 75 % 73 % 75 % 78 % ________________ (1) Member of Jump Trading Group (2) Consists of Global Execution Brokers, LP and G1X Execution Services, LLC (3) Consists of Wolverine Execution Services, LLC and Wolverine Securities LLC

BUSINESS COMBINATIONS (Tables)

BUSINESS COMBINATIONS (Tables)	9 Months Ended
	Sep. 30, 2021
Business Combination and Asset Acquisition [Abstract]
SCHEDULE OF ACQUISITION DATE FAIR VALUE OF CONSIDERATION TRANSFERRED	The acquisition date fair value of the consideration transferred for Say Technologies was $132.8 million, which consisted of the following: (in thousands) Fair Value Cash $ 132,168 Share-based compensation awards attributable to pre-combination services 639 Total consideration $ 132,807 (in thousands) Fair Value Cash and cash equivalents $ 15,412 Accounts receivable 1,704 Goodwill 93,094 Intangible assets 34,600 Other current assets 192 Accounts payable, accrued expenses and other current liabilities (9,354) Deferred tax liability (2,841) Net assets acquired $ 132,807
SCHEDULE OF COMPONENTS OF IDENTIFIABLE INTANGIBLE ASSETS ACQUIRED	The following table sets forth the components of identifiable intangible assets acquired and their estimated useful lives as of the date of acquisition: (in thousands, except years) Fair Value Useful Life Developed technology $ 22,000 3 Customer relationships 12,000 10 Trade names 600 3 Total $ 34,600

REVENUE (Tables)

REVENUE (Tables)	9 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
REVENUE DISAGGREGATED BY REVENUE SOURCE	The following table presents our revenue disaggregated by revenue source: Three Months Ended Nine Months Ended (in thousands) 2020 2021 2020 2021 Transaction-based revenues: Options $ 126,769 $ 163,750 $ 297,677 $ 526,214 Cryptocurrencies 5,282 50,723 14,840 371,413 Equities 68,818 50,459 171,013 235,772 Other 938 1,865 1,321 5,004 Total transaction-based revenues 201,807 266,797 484,851 1,138,403 Net interest revenues: Securities lending 27,891 33,495 63,029 108,569 Margin interest 21,288 34,238 40,075 93,199 Interest on segregated cash and securities 1,359 1,071 11,991 3,112 Other interest revenue 743 853 3,259 3,050 Interest expenses related to credit facilities (875) (6,252) (3,934) (14,319) Total net interest revenues 50,406 63,405 114,420 193,611 Other revenues 17,317 34,721 42,020 120,416 Total net revenues $ 269,530 $ 364,923 $ 641,291 $ 1,452,430
RECEIVABLES AND CONTRACT BALANCES	The table below sets forth contract receivables balances for the period indicated: (in thousands) Contract Receivables Beginning of period, January 1, 2021 $ 111,871 End of period, September 30, 2021 115,298 Increase in contract receivables during the period $ 3,427 The table below sets forth contract liabilities balances for the period indicated: (in thousands) Contract Liabilities Beginning of period, January 1, 2021 $ 2,060 End of period, September 30, 2021 3,298 Increase in contract liabilities during the period $ 1,238

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS (Tables)	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Movement on Goodwill	The carrying amount of goodwill for the period indicated was as follows: (in thousands) Carrying Amount As of December 31, 2020 $ — Additions due to business combinations 95,564 As of September 30, 2021 $ 95,564
Schedule of Components of Finite-Lived Intangible Assets	The components of intangible assets, net as of September 30, 2021 were as follows: (in thousands, except years) Gross Carrying Value Accumulated Amortization Net Carrying Value Weighted Average Remaining Useful Life - Years Finite-lived intangible assets Developed technology $ 22,000 $ (964) $ 21,036 3 Customer relationships 12,000 (158) 11,842 10 Trade names 600 (26) 574 3 Domain names 163 (40) 123 12 Indefinite-lived intangible assets 1,652 — 1,652 N/A Total $ 36,415 $ (1,188) $ 35,227
Schedule of Components of Indefinite-Lived Intangible Assets	The components of intangible assets, net as of September 30, 2021 were as follows: (in thousands, except years) Gross Carrying Value Accumulated Amortization Net Carrying Value Weighted Average Remaining Useful Life - Years Finite-lived intangible assets Developed technology $ 22,000 $ (964) $ 21,036 3 Customer relationships 12,000 (158) 11,842 10 Trade names 600 (26) 574 3 Domain names 163 (40) 123 12 Indefinite-lived intangible assets 1,652 — 1,652 N/A Total $ 36,415 $ (1,188) $ 35,227
Schedule of Future Amortization Expense in Acquired Intangible Assets	As of September 30, 2021, the estimated future amortization expense of finite-lived intangible assets was as follows: (in thousands) Intangible Assets Remainder of 2021 $ 2,210 2022 8,768 2023 8,768 2024 5,890 2025 1,199 Thereafter 6,740 Total $ 33,575

ALLOWANCE FOR CREDIT LOSSES (Ta

ALLOWANCE FOR CREDIT LOSSES (Tables)	9 Months Ended
	Sep. 30, 2021
Credit Loss [Abstract]
ALLOWANCE FOR CREDIT LOSSES OF RECEIVABLES FROM USERS	The following table summarizes the allowance for credit losses, which primarily relate to unsecured balances of receivables from users due to fraudulent, unlawful or otherwise inappropriate customer behavior, such as when customers initiate deposits into their accounts, make trades on our platform using a short-term extension of credit from us, and then repatriate or reverse the deposits, resulting in a loss to us of the credited amount (“Fraudulent Deposit Transactions”) and to a lesser extent, losses on margin borrowings, for the periods indicated: Three Months Ended Nine Months Ended (in thousands) 2020 2021 2020 2021 Beginning balance $ 41,055 $ 35,253 $ 17,122 $ 34,092 Provision for credit losses 20,406 25,051 44,339 61,796 Write-offs (552) (22,552) $ (552) $ (58,136) Ending balance $ 60,909 $ 37,752 $ 60,909 $ 37,752

FAIR VALUE OF FINANCIAL INSTR_2

FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
SCHEDULE OF FINANCIAL ASSETS AND LIABILITIES MEASURED AT FAIR VALUE ON A RECURRING BASIS	Financial assets and liabilities measured at fair value on a recurring basis as of the date indicated below were presented on our unaudited condensed consolidated balance sheets as follows: December 31, 2020 (in thousands) Level 1 Level 2 Level 3 Total Assets Cash equivalents: Money market funds $ 1,026,034 $ — $ — $ 1,026,034 Cash and securities segregated under federal and other regulations: U.S. Treasury securities 134,994 — — 134,994 Other current assets: Equity securities - user-held fractional shares 802,483 — — 802,483 Equity securities - securities owned 3,222 — — 3,222 Total financial assets $ 1,966,733 $ — $ — $ 1,966,733 Liabilities Accounts payable and accrued expenses: Equity securities - referral program liability $ 695 $ — $ — $ 695 Other current liabilities: Equity securities - repurchase obligations 802,483 — — 802,483 Total financial liabilities $ 803,178 $ — $ — $ 803,178 September 30, 2021 (in thousands) Level 1 Level 2 Level 3 Total Assets Cash equivalents: Money market funds $ 4,006,138 $ — $ — $ 4,006,138 Cash and securities segregated under federal and other regulations: U.S. Treasury securities 50,000 — — 50,000 Other current assets: Equity securities - user-held fractional shares 1,530,971 — — 1,530,971 Equity securities - securities owned 22,769 — — 22,769 Total financial assets $ 5,609,878 $ — $ — $ 5,609,878 Liabilities Accounts payable and accrued expenses: Equity securities - referral program liability $ 46 $ — $ — $ 46 Other current liabilities: Equity securities - repurchase obligations 1,530,971 — — 1,530,971 Total financial liabilities $ 1,531,017 $ — $ — $ 1,531,017
SCHEDULE OF CHANGES IN ESTIMATED FAIR VALUE OF CONVERTIBLE NOTES AND WARRANT LIABILITY	The following table sets forth a summary of the changes in the estimated fair value of our convertible notes and warrant liability: (in thousands) Convertible notes Warrant liability Beginning of period, January 1, 2021 $ — $ — Issued during the period 3,299,031 252,944 Change in fair value 1,918,565 127,092 Reclassifications to equity (5,217,596) (380,036) End of period, September 30, 2021 $ — $ —

INCOME TAXES (Tables)

INCOME TAXES (Tables)	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
SCHEDULE OF INCOME TAX PROVISION (BENEFIT)	Three Months Ended Nine Months Ended (in thousands, except percentages) 2020 2021 2020 2021 Loss before income taxes $ (10,994) $ (1,366,941) $ (5,464) $ (3,264,123) Provision (benefit from) for income taxes (333) (50,244) 115 (958) Effective Tax Rate 3.0 % 3.7 % (2.1) % — %

PROPERTY, SOFTWARE AND EQUIPM_2

PROPERTY, SOFTWARE AND EQUIPMENT, NET (Tables)	9 Months Ended
	Sep. 30, 2021
Property, Plant and Equipment [Abstract]
SCHEDULE OF PROPERTY, SOFTWARE AND EQUIPMENT	Property, software and equipment are presented net of accumulated depreciation and amortization and summarized as follows: December 31, September 30, (in thousands) 2020 2021 Tenant improvements $ 18,945 $ 53,395 Internally developed software 16,992 25,397 Computer equipment 9,203 22,003 Furniture and fixtures 8,024 17,965 Construction in progress 9,756 27,413 Total 62,920 146,173 Less: accumulated depreciation and amortization (17,086) (31,507) Property, software and equipment, net $ 45,834 $ 114,666

OFFSETTING ASSETS AND LIABILI_2

OFFSETTING ASSETS AND LIABILITIES (Tables)	9 Months Ended
	Sep. 30, 2021
Offsetting [Abstract]
SCHEDULE OF ASSETS SUBJECT TO MASTER NETTING ARRANGEMENT	Our assets and liabilities subject to master netting arrangements are as follows: December 31, September 30, (in thousands) 2020 2021 Assets Securities borrowed Gross amount of securities borrowed $ 372 $ 879 Gross amount offset on the unaudited condensed consolidated balance sheets — — Amounts of assets presented on the unaudited condensed consolidated balance sheets (1) 372 879 Gross amount of securities borrowed not offset on the unaudited condensed consolidated balance sheets: Securities borrowed 372 879 Security collateral received (361) (816) Net amount $ 11 $ 63 Liabilities Securities loaned Gross amount of securities loaned $ 1,921,118 $ 3,129,650 Gross amount of securities loaned offset on the unaudited condensed consolidated balance sheets — — Amounts of liabilities presented on the unaudited condensed consolidated balance sheets 1,921,118 3,129,650 Gross amount of securities loaned not offset on the unaudited condensed consolidated balance sheets: Securities loaned 1,921,118 3,129,650 Security collateral pledged (1,787,819) (3,017,536) Net amount $ 133,299 $ 112,114 ________________ (1) Securities borrowed are included in receivables from brokers, dealers and clearing organizations on the unaudited condensed consolidated balance sheets.
SCHEDULE OF LIABILITIES SUBJECT TO MASTER NETTING ARRANGEMENT	Our assets and liabilities subject to master netting arrangements are as follows: December 31, September 30, (in thousands) 2020 2021 Assets Securities borrowed Gross amount of securities borrowed $ 372 $ 879 Gross amount offset on the unaudited condensed consolidated balance sheets — — Amounts of assets presented on the unaudited condensed consolidated balance sheets (1) 372 879 Gross amount of securities borrowed not offset on the unaudited condensed consolidated balance sheets: Securities borrowed 372 879 Security collateral received (361) (816) Net amount $ 11 $ 63 Liabilities Securities loaned Gross amount of securities loaned $ 1,921,118 $ 3,129,650 Gross amount of securities loaned offset on the unaudited condensed consolidated balance sheets — — Amounts of liabilities presented on the unaudited condensed consolidated balance sheets 1,921,118 3,129,650 Gross amount of securities loaned not offset on the unaudited condensed consolidated balance sheets: Securities loaned 1,921,118 3,129,650 Security collateral pledged (1,787,819) (3,017,536) Net amount $ 133,299 $ 112,114 ________________ (1) Securities borrowed are included in receivables from brokers, dealers and clearing organizations on the unaudited condensed consolidated balance sheets.

OTHER CURRENT ASSETS (Tables)

OTHER CURRENT ASSETS (Tables)	9 Months Ended
	Sep. 30, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
DETAIL OF OTHER CURRENT ASSETS	The following table presents the detail of other current assets: December 31, September 30, (in thousands) 2020 2021 User-held fractional shares $ 802,483 $ 1,530,971 Prepaid expenses 28,629 98,303 Securities owned 3,222 22,769 Restricted cash — 1,690 Other 16,804 20,280 Total other current assets $ 851,138 $ 1,674,013

MEZZANINE EQUITY, COMMON STOC_2

MEZZANINE EQUITY, COMMON STOCK AND STOCKHOLDERS' (DEFICIT) EQUITY (Tables)	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
SCHEDULE OF REDEEMABLE CONVERTIBLE PREFERRED STOCK	The following table is a summary of redeemable convertible preferred stock as of December 31, 2020: (in thousands, except share data and per share amounts) Series Shares Authorized Shares Issued and Outstanding Per Share Liquidation Preference Liquidation Amount Per Share Initial Conversion Price Carrying Value of Stock, Net of Issuance Costs A 131,913,460 131,913,460 $ 0.1954 $ 25,777 $ 0.1954 $ 16,139 B 80,263,020 80,263,020 0.6354 50,999 0.6354 50,999 C 43,788,180 43,788,180 2.5121 110,000 2.5121 109,870 D 35,774,761 35,774,761 10.1450 362,935 10.1450 362,670 E 29,887,357 29,887,357 12.4827 373,075 12.4827 372,733 F 48,000,000 48,000,000 12.5000 600,000 12.5000 599,284 G 44,406,442 43,116,119 15.5000 668,300 15.5000 668,044 414,033,220 412,742,897 $ 2,191,086 $ 2,179,739
SCHEDULE OF STOCK OPTION ACTIVITY	A summary of stock option activity for the nine months ended September 30, 2021 is as follows: Number of Shares Weighted-Average Exercise Price Weighted- Average Remaining Life Total Intrinsic Value (in thousands) Balance at December 31, 2020 21,543,828 $ 2.19 6.52 $ 304,590 Granted during the period — — Exercised during the period (5,819,965) 2.02 Cancelled and forfeited during the period (276,657) 4.51 Balance at September 30, 2021 15,447,206 $ 2.21 5.66 $ 615,827 Options vested and expected to vest at September 30, 2021 15,447,206 $ 2.21 5.66 $ 615,827 Options exercisable at September 30, 2021 14,040,377 $ 1.79 5.49 $ 565,754
SCHEDULE OF ACTIVITY RELATED TO TIME-BASED AND MARKET-BASED RSUs	The following table summarizes the activity related to our Time-Based RSUs for the nine months ended September 30, 2021: Number of RSUs Weighted- average grant date fair value Unvested at December 31, 2020 47,711,649 $ 10.84 Granted 28,635,488 40.76 Vested (23,261,472) 17.94 Forfeited (2,442,812) 24.37 Unvested at September 30, 2021 50,642,853 $ 32.20 The following table summarizes the activity related to our Market-Based RSUs for the nine months ended September 30, 2021: Number of RSUs Weighted- average grant date fair value Unvested at December 31, 2020 27,663,658 $ 0.29 Granted 35,520,000 22.68 Vested (4,149,548) 2.34 Forfeited — — Unvested at September 30, 2021 59,034,110 $ 23.46
SCHEDULE OF SHARE-BASED COMPENSATION	The following table presents share-based compensation in our unaudited condensed consolidated statements of operations for the periods indicated: Three Months Ended Nine Months Ended (in thousands) 2020 2021 2020 2021 Brokerage and transaction $ 6 $ 6,405 $ 18 $ 6,417 Technology and development 992 502,748 3,532 504,773 Operations 5 16,410 23 16,416 Marketing 40 40,966 55 41,044 General and administrative 528 677,785 1,720 685,798 Total $ 1,571 $ 1,244,314 $ 5,348 $ 1,254,448

NET LOSS PER SHARE (Tables)

NET LOSS PER SHARE (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
CALCULATION OF BASIC AND DILUTED INCOME (LOSS) PER SHARE	The following table presents the calculation of basic and diluted loss per share: (in thousands, except per share data) Three Months Ended Nine Months Ended 2020 2021 2020 2021 Net loss $ (10,661) $ (1,316,697) $ (5,579) $ (3,263,165) Less: allocation of earnings to participating securities — — — — Net loss attributable to common stockholders $ (10,661) $ (1,316,697) $ (5,579) $ (3,263,165) Weighted-average common stock outstanding - basic 225,997,444 638,168,188 225,299,165 368,518,894 Dilutive effect of stock options and unvested shares — — — — Weighted-average common stock outstanding - diluted 225,997,444 638,168,188 225,299,165 368,518,894 Net loss per share attributable to common stockholders: Basic $ (0.05) $ (2.06) $ (0.02) $ (8.85) Diluted $ (0.05) $ (2.06) $ (0.02) $ (8.85)
POTENTIAL COMMON SHARES EXCLUDED FROM THE CALCULATION OF DILUTED NET INCOME (LOSS) PER SHARE	The following potential common shares were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive or issuance of such shares is contingent upon the satisfaction of certain conditions which were not satisfied by the end of the period: Three Months Ended Nine Months Ended 2020 2021 2020 2021 Redeemable convertible preferred stock 412,742,897 — 412,742,897 — RSUs 65,598,613 112,492,359 65,598,613 112,492,359 Stock options 24,836,871 15,447,206 24,836,871 15,447,206 Unvested shares 306,966 65,435 306,966 65,435 Warrants — 14,278,034 — 14,278,034 ESPP shares — 93,738 — 93,738 Total anti-dilutive securities 503,485,347 142,376,772 503,485,347 142,376,772

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	9 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
SCHEDULE OF COMPONENTS OF LEASE EXPENSE, OTHER INFORMATION AND CASH FLOWS	The components of lease expense were as follows: Three Months Ended Nine Months Ended (in thousands) 2020 2021 2020 2021 Fixed operating lease costs $ 2,971 $ 7,115 $ 8,034 $ 15,905 Variable operating lease costs 791 1,232 2,218 3,684 Short-term lease costs 266 457 579 1,067 Total lease costs $ 4,028 $ 8,804 $ 10,831 $ 20,656 Other information related to our operating leases was as follows: December 31, September 30, 2020 2021 Weighted-average remaining lease term 5.41 years 7.46 years Weighted-average discount rate 7.02 % 6.27 % Cash flows related to leases were as follows: Nine Months Ended (in thousands) 2020 2021 Operating cash flows: Payments for operating lease liabilities $ 11,238 $ 240 Supplemental cash flow data: Lease liabilities arising from obtaining right-of-use assets $ 14,991 $ 96,519
SCHEDULE OF FUTURE MINIMUM LEASE PAYMENTS	Future minimum lease payments under non-cancellable operating leases (with initial lease terms in excess of one year) as of September 30, 2021 are as follows: (in thousands) Remainder of 2021 $ 5,807 2022 32,646 2023 34,821 2024 33,355 2025 32,436 Thereafter 125,724 Total undiscounted lease payments 264,789 Less: imputed interest (44,385) Less: lease incentives (12,682) Less: leases executed but not yet commenced (53,185) Total lease liabilities $ 154,537

DESCRIPTION OF BUSINESS AND S_4

DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - NARRATIVE (Details) $ / shares in Units, $ in Thousands	Aug. 31, 2021shares	Aug. 02, 2021USD ($)class$ / sharesshares	Sep. 30, 2021USD ($)classshares	Sep. 30, 2020USD ($)	Dec. 31, 2020shares
Subsidiary, Sale of Stock [Line Items]
Proceeds from issuance of common stock in connection with initial public offering, net of offering costs | $			$ 2,057,530	$ 0
Common stock, shares authorized (in shares)			0		777,354,000
Preferred stock, shares authorized (in shares)					0
Number of classes of common stock | class			3
IPO
Subsidiary, Sale of Stock [Line Items]
Proceeds from issuance of common stock in connection with initial public offering, net of offering costs | $		$ 2,050,000
Underwriting discounts and commissions | $		90,800
Deferred offering costs | $		$ 12,600
Preferred stock, shares authorized (in shares)			210,000,000
Conversion of convertible preferred stock (in shares)		412,700,000
Conversion of convertible Common Stock (in shares)		233,300,000
Number of classes of common stock | class		3
Issuance of common stock upon settlement of restricted stock units, net of shares withheld | $		$ 1,010,000
Share-based payment arrangement, shares withheld for tax withholding obligation (in shares)		24,600,000
Common Class A
Subsidiary, Sale of Stock [Line Items]
Common stock, shares authorized (in shares)			21,000,000,000		0
Common Class A | IPO
Subsidiary, Sale of Stock [Line Items]
Shares issued in IPO (in shares)		55,000,000
Offering price in IPO (in dollars per share) | $ / shares		$ 38
Common stock, shares authorized (in shares)		21,000,000,000
Conversion of stock, shares converted (in shares)		130,200,000
Convertible notes converted to common stock (in shares)		137,300,000
Exercise price (in dollars per share) | $ / shares		$ 26.60
Aggregate warrants exercisable (in shares)		14,300,000
Restricted stock, shares issued for tax withholdings (In shares)		10,800,000
Common Class A | IPO - Shares from Existing Shareholders
Subsidiary, Sale of Stock [Line Items]
Shares issued in IPO (in shares)		2,600,000
Common Class A | Over-Allotment Option
Subsidiary, Sale of Stock [Line Items]
Shares issued in IPO (in shares)	4,400,000
Common Class B
Subsidiary, Sale of Stock [Line Items]
Common stock, shares authorized (in shares)			700,000,000		0
Common Class B | IPO
Subsidiary, Sale of Stock [Line Items]
Common stock, shares authorized (in shares)		700,000,000
Common Class C
Subsidiary, Sale of Stock [Line Items]
Common stock, shares authorized (in shares)			7,000,000,000		0
Common Class C | IPO
Subsidiary, Sale of Stock [Line Items]
Common stock, shares authorized (in shares)		7,000,000,000

DESCRIPTION OF BUSINESS AND S_5

DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - SCHEDULE OF CONCENTRATION OF CREDIT RISK (Details) - Customer Concentration Risk - Revenue Benchmark	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Citadel Securities, LLC
Concentration Risk [Line Items]
Concentration risk, percentage	23.00%	33.00%	21.00%	34.00%
Tai Mo Shan Limited
Concentration Risk [Line Items]
Concentration risk, percentage	8.00%	1.00%	17.00%	2.00%
Entities affiliated with Susquehanna International Group, LLP
Concentration Risk [Line Items]
Concentration risk, percentage	13.00%	18.00%	11.00%	20.00%
Entities affiliated with Wolverine Holdings, L.P.
Concentration Risk [Line Items]
Concentration risk, percentage	13.00%	10.00%	10.00%	10.00%
All others individually less than 10%
Concentration Risk [Line Items]
Concentration risk, percentage	16.00%	13.00%	19.00%	9.00%
Total as percentage of total revenue
Concentration Risk [Line Items]
Concentration risk, percentage	73.00%	75.00%	78.00%	75.00%

BUSINESS COMBINATIONS - NARRATI

BUSINESS COMBINATIONS - NARRATIVE (Details) - USD ($) $ in Thousands	Aug. 13, 2021	Sep. 30, 2021	Sep. 30, 2021
Business Acquisition [Line Items]
Vesting of replacement awards issued in connection with acquisition		$ 639	$ 639
Say
Business Acquisition [Line Items]
Total consideration	$ 132,807
Holdback agreements with certain employees	$ 11,100
Business combination, employees services period (in year)	3 years
Share-based compensation awards attributable to pre-combination services	$ 639
Business combination, pro forma information, post-combination compensation expense	1,900
Say | 2021 ESPP
Business Acquisition [Line Items]
Vesting of replacement awards issued in connection with acquisition	6,300
Share-based compensation awards attributable to pre-combination services	600
Stock-based compensation awards attributable to post-combination services	$ 5,700
Say | Trademarks and Trade Names
Business Acquisition [Line Items]
Useful Life	5 years

BUSINESS COMBINATIONS - SCHEDUL

BUSINESS COMBINATIONS - SCHEDULE OF ACQUISITION DATE FAIR VALUE OF CONSIDERATION TRANSFERRED (Details) - USD ($) $ in Thousands	Aug. 13, 2021	Sep. 30, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Goodwill		$ 95,564	$ 0
Say
Business Acquisition [Line Items]
Cash	$ 132,168
Share-based compensation awards attributable to pre-combination services	639
Total consideration	132,807
Cash and cash equivalents	15,412
Accounts receivable	1,704
Goodwill	93,094
Intangible assets	34,600
Other current assets	192
Accounts payable, accrued expenses and other current liabilities	(9,354)
Deferred tax liability	(2,841)
Net assets acquired	$ 132,807

BUSINESS COMBINATIONS - SCHED_2

BUSINESS COMBINATIONS - SCHEDULE OF COMPONENTS OF IDENTIFIABLE INTANGIBLE ASSETS ACQUIRED (Details) - Say $ in Thousands	Aug. 13, 2021USD ($)
Acquired Indefinite-lived Intangible Assets [Line Items]
Fair Value	$ 34,600
Developed technology
Acquired Indefinite-lived Intangible Assets [Line Items]
Fair Value	$ 22,000
Useful Life	3 years
Customer relationships
Acquired Indefinite-lived Intangible Assets [Line Items]
Fair Value	$ 12,000
Useful Life	10 years
Trade names
Acquired Indefinite-lived Intangible Assets [Line Items]
Fair Value	$ 600
Useful Life	3 years

REVENUE - REVENUE DISAGGREGATED

REVENUE - REVENUE DISAGGREGATED BY REVENUE SOURCE (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Securities lending	$ 33,495	$ 27,891	$ 108,569	$ 63,029
Margin interest	34,238	21,288	93,199	40,075
Interest on segregated cash and securities	1,071	1,359	3,112	11,991
Other interest revenue	853	743	3,050	3,259
Interest expenses related to credit facilities	(6,252)	(875)	(14,319)	(3,934)
Net interest revenues	63,405	50,406	193,611	114,420
Total net revenues	364,923	269,530	1,452,430	641,291
Options
Disaggregation of Revenue [Line Items]
Revenues	163,750	126,769	526,214	297,677
Cryptocurrencies
Disaggregation of Revenue [Line Items]
Revenues	50,723	5,282	371,413	14,840
Equities
Disaggregation of Revenue [Line Items]
Revenues	50,459	68,818	235,772	171,013
Other
Disaggregation of Revenue [Line Items]
Revenues	1,865	938	5,004	1,321
Transaction-based revenues
Disaggregation of Revenue [Line Items]
Revenues	266,797	201,807	1,138,403	484,851
Other revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 34,721	$ 17,317	$ 120,416	$ 42,020

REVENUE - RECEIVABLES AND CONTR

REVENUE - RECEIVABLES AND CONTRACT LIABILITIES BALANCES (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)
Contract with Customer, Asset [Roll Forward]
Beginning of period, January 1, 2021	$ 111,871
End of period, September 30, 2021	115,298
Increase in contract receivables during the period	3,427
Contract with Customer, Liability [Roll Forward]
Beginning of period, January 1, 2021	2,060
End of period, September 30, 2021	3,298
Increase in contract liabilities during the period	$ 1,238

GOODWILL AND INTANGIBLE ASSET_2

GOODWILL AND INTANGIBLE ASSETS - SCHEDULE OF MOVEMENT ON GOODWILL (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 0
Additions due to business combinations	95,564
Goodwill, ending balance	$ 95,564

GOODWILL AND INTANGIBLE ASSET_3

GOODWILL AND INTANGIBLE ASSETS - Schedule of Components of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (1,188)
Net Carrying Value	33,575
Indefinite-lived intangible assets	1,652
Intangible assets, gross carrying value	36,415
Intangible assets, net	35,227	$ 185
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	22,000
Accumulated Amortization	(964)
Net Carrying Value	$ 21,036
Weighted Average Remaining Useful Life - Years	3 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 12,000
Accumulated Amortization	(158)
Net Carrying Value	$ 11,842
Weighted Average Remaining Useful Life - Years	10 years
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 600
Accumulated Amortization	(26)
Net Carrying Value	$ 574
Weighted Average Remaining Useful Life - Years	3 years
Domain names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 163
Accumulated Amortization	(40)
Net Carrying Value	$ 123
Weighted Average Remaining Useful Life - Years	12 years

GOODWILL AND INTANGIBLE ASSET_4

GOODWILL AND INTANGIBLE ASSETS - SCHEDULE OF FUTURE AMORTIZATION EXPENSES IN ACQUIRED INTANGIBLE ASSETS (Details) $ in Thousands	Sep. 30, 2021USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remainder of 2021	$ 2,210
2022	8,768
2023	8,768
2024	5,890
2025	1,199
Thereafter	6,740
Net Carrying Value	$ 33,575

GOODWILL AND INTANGIBLE ASSET_5

GOODWILL AND INTANGIBLE ASSETS - NARRATIVE (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, impairment loss	$ 0		$ 0
Amortization expense of intangible assets		$ 0		$ 0
Impairment of intangible assets	$ 0	$ 0	$ 0	$ 0

ALLOWANCE FOR CREDIT LOSSES - A

ALLOWANCE FOR CREDIT LOSSES - ALLOWANCE FOR CREDIT LOSSES OF RECEIVABLES FROM USERS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Contract with Customer, Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 35,253	$ 41,055	$ 34,092	$ 17,122
Provision for credit losses	25,051	20,406	61,796	44,339
Write-offs	(22,552)	(552)	(58,136)	(552)
Ending balance	$ 37,752	$ 60,909	$ 37,752	$ 60,909

ALLOWANCE FOR CREDIT LOSSES - N

ALLOWANCE FOR CREDIT LOSSES - NARRATIVE (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Provision for credit losses	$ (25,051)	$ (20,406)	$ (61,796)	$ (44,339)
Allowance for credit losses	37,752	60,909	37,752	60,909	$ 35,253	$ 34,092	$ 41,055	$ 17,122
Transaction-based revenues
Disaggregation of Revenue [Line Items]
Provision for credit losses	24,700	20,100	59,600	43,400
Allowance for credit losses	35,000	60,500	35,000	60,500
Other revenues
Disaggregation of Revenue [Line Items]
Provision for credit losses	300	300	2,200	900
Allowance for credit losses	$ 2,800	$ 400	$ 2,800	$ 400

FAIR VALUE OF FINANCIAL INSTR_3

FAIR VALUE OF FINANCIAL INSTRUMENTS - SCHEDULE OF FINANCIAL ASSETS AND LIABILITIES MEASURED AT FAIR VALUE ON A RECURRING BASIS (Details) - Fair Value, Recurring - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets
Total financial assets	$ 5,609,878	$ 1,966,733
Liabilities
Total financial liabilities	1,531,017	803,178
Equity securities - user-held fractional shares
Assets
Other current assets	1,530,971	802,483
Equity securities - securities owned
Assets
Other current assets	22,769	3,222
U.S. Treasury securities
Assets
Cash and securities segregated under federal and other regulations		134,994
Equity securities - referral program liability
Liabilities
Accounts payable and accrued expenses	46	695
Equity securities - repurchase obligations
Liabilities
Other current liabilities	1,530,971	802,483
Money market funds
Assets
Cash equivalents	4,006,138	1,026,034
U.S. Treasury securities
Assets
Cash equivalents	50,000
Level 1
Assets
Total financial assets	5,609,878	1,966,733
Liabilities
Total financial liabilities	1,531,017	803,178
Level 1 | Equity securities - user-held fractional shares
Assets
Other current assets	1,530,971	802,483
Level 1 | Equity securities - securities owned
Assets
Other current assets	22,769	3,222
Level 1 | U.S. Treasury securities
Assets
Cash and securities segregated under federal and other regulations		134,994
Level 1 | Equity securities - referral program liability
Liabilities
Accounts payable and accrued expenses	46	695
Level 1 | Equity securities - repurchase obligations
Liabilities
Other current liabilities	1,530,971	802,483
Level 1 | Money market funds
Assets
Cash equivalents	4,006,138	1,026,034
Level 1 | U.S. Treasury securities
Assets
Cash equivalents	50,000
Level 2
Assets
Total financial assets	0	0
Liabilities
Total financial liabilities	0	0
Level 2 | Equity securities - user-held fractional shares
Assets
Other current assets	0	0
Level 2 | Equity securities - securities owned
Assets
Other current assets	0	0
Level 2 | U.S. Treasury securities
Assets
Cash and securities segregated under federal and other regulations		0
Level 2 | Equity securities - referral program liability
Liabilities
Accounts payable and accrued expenses	0	0
Level 2 | Equity securities - repurchase obligations
Liabilities
Other current liabilities	0	0
Level 2 | Money market funds
Assets
Cash equivalents	0	0
Level 2 | U.S. Treasury securities
Assets
Cash equivalents	0
Level 3
Assets
Total financial assets	0	0
Liabilities
Total financial liabilities	0	0
Level 3 | Equity securities - user-held fractional shares
Assets
Other current assets	0	0
Level 3 | Equity securities - securities owned
Assets
Other current assets	0	0
Level 3 | U.S. Treasury securities
Assets
Cash and securities segregated under federal and other regulations		0
Level 3 | Equity securities - referral program liability
Liabilities
Accounts payable and accrued expenses	0	0
Level 3 | Equity securities - repurchase obligations
Liabilities
Other current liabilities	0	0
Level 3 | Money market funds
Assets
Cash equivalents	0	$ 0
Level 3 | U.S. Treasury securities
Assets
Cash equivalents	$ 0

FAIR VALUE OF FINANCIAL INSTR_4

FAIR VALUE OF FINANCIAL INSTRUMENTS - NARRATIVE (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2021USD ($)	Sep. 30, 2021USD ($)	Feb. 28, 2021tranche
Convertible notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total loss due to changes in fair value | $	$ (27,800)	$ (1,918,565)
Warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Total loss due to changes in fair value | $	$ 2,500	$ (127,092)
Convertible notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Number of tranches issued | tranche			2
Convertible notes | Investor
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Number of tranches issued | tranche			2

FAIR VALUE OF FINANCIAL INSTR_5

FAIR VALUE OF FINANCIAL INSTRUMENTS - SCHEDULE OF CHANGES IN ESTIMATED FAIR VALUE OF CONVERTIBLE NOTES AND WARRANT LIABILITY (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021
Convertible notes
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning of period, January 1, 2021		$ 0
Issued during the period		3,299,031
Change in fair value	$ 27,800	1,918,565
Reclassifications to equity		(5,217,596)
End of period, September 30, 2021	0	0
Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning of period, January 1, 2021		0
Issued during the period		252,944
Change in fair value	(2,500)	127,092
Reclassifications to equity		(380,036)
End of period, September 30, 2021	$ 0	$ 0

INCOME TAXES - SCHEDULE OF INCO

INCOME TAXES - SCHEDULE OF INCOME TAX PROVISION (BENEFIT) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Loss before income taxes	$ (1,366,941)	$ (10,994)	$ (3,264,123)	$ (5,464)
Provision for (benefit from) income taxes	$ (50,244)	$ (333)	$ (958)	$ 115
Effective Tax Rate	3.70%	3.00%	0.00%	(2.10%)

PROPERTY, SOFTWARE AND EQUIPM_3

PROPERTY, SOFTWARE AND EQUIPMENT, NET - SCHEDULE OF PROPERTY, SOFTWARE AND EQUIPMENT (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, software and equipment, gross	$ 146,173	$ 62,920
Less: accumulated depreciation and amortization	(31,507)	(17,086)
Property, software and equipment, net	114,666	45,834
Computer equipment
Property, Plant and Equipment [Line Items]
Property, software and equipment, gross	22,003	9,203
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, software and equipment, gross	17,965	8,024
Tenant improvements
Property, Plant and Equipment [Line Items]
Property, software and equipment, gross	53,395	18,945
Internally developed software
Property, Plant and Equipment [Line Items]
Property, software and equipment, gross	25,397	16,992
Construction in progress
Property, Plant and Equipment [Line Items]
Property, software and equipment, gross	$ 27,413	$ 9,756

PROPERTY, SOFTWARE AND EQUIPM_4

PROPERTY, SOFTWARE AND EQUIPMENT, NET - NARRATIVE (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Property, Plant and Equipment [Abstract]
Depreciation expense of property and equipment	$ 4.1	$ 1.6	$ 9.9	$ 3.7
Amortization expense of internally developed software	$ 1.8	$ 1.1	$ 4.7	$ 2.9

OFFSETTING ASSETS AND LIABILI_3

OFFSETTING ASSETS AND LIABILITIES - SCHEDULE OF ASSETS AND LIABILITIES SUBJECT TO MASTER NETTING ARRANGEMENTS (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets
Gross amount of securities borrowed	$ 879	$ 372
Gross amount offset on the unaudited condensed consolidated balance sheets	0	0
Amounts of assets presented on the unaudited condensed consolidated balance sheets	879	372
Securities borrowed	879	372
Security collateral received	(816)	(361)
Net amount	63	11
Liabilities
Gross amount of securities loaned	3,129,650	1,921,118
Gross amount of securities loaned offset on the unaudited condensed consolidated balance sheets	0	0
Amounts of liabilities presented on the unaudited condensed consolidated balance sheets	3,129,650	1,921,118
Securities loaned	3,129,650	1,921,118
Security collateral pledged	(3,017,536)	(1,787,819)
Net amount	$ 112,114	$ 133,299

OFFSETTING ASSETS AND LIABILI_4

OFFSETTING ASSETS AND LIABILITIES - NARRATIVE (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Offsetting [Abstract]
Contractual term	30 days
Contractual obligation	$ 25,000
Fair value of securities re-pledged	8,460,000	$ 4,630,000
Security collateral received	816	$ 361
Amount re-pledged with clearing organizations to meet deposit requirements	$ 235,200

OTHER CURRENT ASSETS - DETAIL O

OTHER CURRENT ASSETS - DETAIL OF OTHER CURRENT ASSETS (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
User-held fractional shares	$ 1,530,971	$ 802,483
Prepaid expenses	98,303	28,629
Securities owned	22,769	3,222
Restricted cash	1,690	0
Other	20,280	16,804
Other current assets	$ 1,674,013	$ 851,138

FINANCING ACTIVITIES AND OFF-_2

FINANCING ACTIVITIES AND OFF-BALANCE SHEET RISK - NARRATIVE (Details)

1 Months Ended

3 Months Ended

9 Months Ended

Apr. 30, 2021USD ($)

Feb. 28, 2021USD ($)tranche$ / shares

Oct. 31, 2019USD ($)

Sep. 30, 2019USD ($)

Sep. 30, 2021USD ($)shares

Sep. 30, 2021USD ($)shares

Aug. 02, 2021$ / sharesshares

Dec. 31, 2020USD ($)

Oct. 31, 2020USD ($)

Jun. 30, 2020USD ($)

Debt Instrument [Line Items]

Settlement date basis, equities

2 days

Settlement date basis, options

1 day

Tranche 1 Convertible Note Holders

Debt Instrument [Line Items]

Aggregate proceeds invested, percentage

15.00%

Maximum amount of all warrants

$ 379,800,000

Percentage of per unit of warrants required to meet qualify in IPO

70.00%

Outstanding warrants strike price (in dollars per share) | $ / shares

$ 38.29

Common Class A | IPO

Debt Instrument [Line Items]

Aggregate warrants exercisable (in shares) | shares

14,300,000

Conversion price (in dollars per share) | $ / shares

$ 26.60

Exercise price (in dollars per share) | $ / shares

$ 26.60

Common stock

Debt Instrument [Line Items]

Conversion of preferred stock to common stock (in shares) | shares

412,742,897

[1]

412,742,897

[2]

Convertible notes

Debt Instrument [Line Items]

Number of tranches issued | tranche

2

Interest rate on loan

6.00%

Convertible notes | Common Class A

Debt Instrument [Line Items]

Gross proceeds from IPO offering to trigger conversion

$ 500,000,000

Conversion price percentage, convertible debt

70.00%

Tranche I Convertible Notes | Convertible notes

Debt Instrument [Line Items]

Notes issued

$ 2,530,000,000

Tranche I Convertible Notes | Convertible notes | Common Class A

Debt Instrument [Line Items]

Conversion price (in dollars per share) | $ / shares

$ 38.29

Tranche II Convertible Notes | Convertible notes

Debt Instrument [Line Items]

Notes issued

$ 1,020,000,000

Tranche II Convertible Notes | Convertible notes | Common Class A

Debt Instrument [Line Items]

Conversion price (in dollars per share) | $ / shares

$ 42.12

Revolving Credit Facility | October 2019 Credit Facility | Line of Credit

Debt Instrument [Line Items]

Line of credit facility, amount entered into

$ 200,000,000

Commitment fee percentage

0.10%

Outstanding borrowings, long-term

$ 0

$ 0

$ 0

Revolving Credit Facility | October 2019 Credit Facility | Eurodollar | Line of Credit

Debt Instrument [Line Items]

Variable rate on loan

1.00%

Revolving Credit Facility | October 2019 Credit Facility | Federal Reserve Bank of New York Rate | Line of Credit

Debt Instrument [Line Items]

Variable rate on loan

0.50%

Revolving Credit Facility | October 2019 Credit Facility | Eurodollar, One Month Interest Period | Line of Credit

Debt Instrument [Line Items]

Variable rate on loan

1.00%

Revolving Credit Facility | October 2019 Credit Facility, As Amended | Line of Credit

Debt Instrument [Line Items]

Line of credit facility, amount entered into

$ 625,000,000

$ 600,000,000

Revolving Credit Facility | Line of Credit | September 2019 Credit Facility

Debt Instrument [Line Items]

Line of credit facility, amount entered into

$ 400,000,000

Outstanding borrowings, short-term

$ 0

Commitment fee percentage

0.35%

Revolving Credit Facility | Line of Credit | September 2019 Credit Facility | Federal Funds Rate

Debt Instrument [Line Items]

Variable rate on loan

1.25%

Revolving Credit Facility | Line of Credit | September 2019 Credit Facility, As Amended

Debt Instrument [Line Items]

Line of credit facility, amount entered into

$ 550,000,000

Revolving Credit Facility | Line of Credit | April 2021 Credit Facility

Debt Instrument [Line Items]

Line of credit facility, amount entered into

$ 2,180,000,000

Outstanding borrowings, short-term

$ 0

$ 0

Commitment fee percentage

0.50%

Revolving Credit Facility | Line of Credit | April 2021 Credit Facility, Tranche A | Short-Term Funding Rate

Debt Instrument [Line Items]

Variable rate on loan

1.25%

Revolving Credit Facility | Line of Credit | April 2021 Credit Facility, Tranche B and C | Short-Term Funding Rate

Debt Instrument [Line Items]

Variable rate on loan

2.50%

[1]

The share amounts listed above combine common stock, Class A common stock and Class B common stock. In connection with the completion of our initial public offering, all previously outstanding shares of common stock were reclassified into Class A common stock and Class B common stock. Refer to Note 1 for more information.

[2]

The share amounts listed above combine common stock, Class A common stock and Class B common stock. In connection with the completion of our initial public offering, all previously outstanding shares of common stock were reclassified into Class A common stock and Class B common stock. Refer to Note 1 for more information.

MEZZANINE EQUITY, COMMON STOC_3

MEZZANINE EQUITY, COMMON STOCK AND STOCKHOLDERS' (DEFICIT) EQUITY - SCHEDULE OF REDEEMABLE CONVERTIBLE PREFERRED STOCK (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Temporary Equity [Line Items]
Shares Authorized (in shares)	0	414,033,220
Shares issued (in shares)	0	412,742,897
Shares outstanding (in shares)	0	412,742,897
Liquidation Amount		$ 2,191,086,000
Carrying Value of Stock, Net of Issuance Costs	$ 0	$ 2,179,739,000
Unrecognized compensation cost	$ 2,170,000,000
Series A
Temporary Equity [Line Items]
Shares Authorized (in shares)		131,913,460
Shares issued (in shares)		131,913,460
Shares outstanding (in shares)		131,913,460
Per Share Liquidation Preference (in dollars per share)		$ 0.1954
Liquidation Amount		$ 25,777,000
Per Share Initial Conversion Price (in dollars per share)		$ 0.1954
Carrying Value of Stock, Net of Issuance Costs		$ 16,139,000
Series B
Temporary Equity [Line Items]
Shares Authorized (in shares)		80,263,020
Shares issued (in shares)		80,263,020
Shares outstanding (in shares)		80,263,020
Per Share Liquidation Preference (in dollars per share)		$ 0.6354
Liquidation Amount		$ 50,999,000
Per Share Initial Conversion Price (in dollars per share)		$ 0.6354
Carrying Value of Stock, Net of Issuance Costs		$ 50,999,000
Series C
Temporary Equity [Line Items]
Shares Authorized (in shares)		43,788,180
Shares issued (in shares)		43,788,180
Shares outstanding (in shares)		43,788,180
Per Share Liquidation Preference (in dollars per share)		$ 2.5121
Liquidation Amount		$ 110,000,000
Per Share Initial Conversion Price (in dollars per share)		$ 2.5121
Carrying Value of Stock, Net of Issuance Costs		$ 109,870,000
Series D
Temporary Equity [Line Items]
Shares Authorized (in shares)		35,774,761
Shares issued (in shares)		35,774,761
Shares outstanding (in shares)		35,774,761
Per Share Liquidation Preference (in dollars per share)		$ 10.1450
Liquidation Amount		$ 362,935,000
Per Share Initial Conversion Price (in dollars per share)		$ 10.1450
Carrying Value of Stock, Net of Issuance Costs		$ 362,670,000
Series E
Temporary Equity [Line Items]
Shares Authorized (in shares)		29,887,357
Shares issued (in shares)		29,887,357
Shares outstanding (in shares)		29,887,357
Per Share Liquidation Preference (in dollars per share)		$ 12.4827
Liquidation Amount		$ 373,075,000
Per Share Initial Conversion Price (in dollars per share)		$ 12.4827
Carrying Value of Stock, Net of Issuance Costs		$ 372,733,000
Series F
Temporary Equity [Line Items]
Shares Authorized (in shares)		48,000,000
Shares issued (in shares)		48,000,000
Shares outstanding (in shares)		48,000,000
Per Share Liquidation Preference (in dollars per share)		$ 12.5000
Liquidation Amount		$ 600,000,000
Per Share Initial Conversion Price (in dollars per share)		$ 12.5000
Carrying Value of Stock, Net of Issuance Costs		$ 599,284,000
Series G
Temporary Equity [Line Items]
Shares Authorized (in shares)		44,406,442
Shares issued (in shares)		43,116,119
Shares outstanding (in shares)		43,116,119
Per Share Liquidation Preference (in dollars per share)		$ 15.5000
Liquidation Amount		$ 668,300,000
Per Share Initial Conversion Price (in dollars per share)		$ 15.5000
Carrying Value of Stock, Net of Issuance Costs		$ 668,044,000

MEZZANINE EQUITY, COMMON STOC_4

MEZZANINE EQUITY, COMMON STOCK AND STOCKHOLDERS' (DEFICIT) EQUITY - NARRATIVE (Details)	Jul. 29, 2021USD ($)	Jun. 30, 2021shares	May 31, 2021$ / sharesshares	Mar. 31, 2021employee$ / shares	Sep. 30, 2021USD ($)voteclass$ / sharesshares	Sep. 30, 2020USD ($)shares	Sep. 30, 2021USD ($)voteclass$ / sharesshares	Sep. 30, 2020USD ($)shares	Dec. 31, 2020$ / sharesshares	Dec. 31, 2019$ / sharesshares	Aug. 02, 2021class$ / sharesshares	Feb. 28, 2021USD ($)shares	Jun. 30, 2020shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Redeemable convertible preferred stock, authorized (in shares)					0		0		414,033,220
Redeemable convertible preferred stock, issued (in shares)					0		0		412,742,897
Redeemable convertible preferred stock, outstanding (in shares)					0		0		412,742,897
Conversion of preferred stock to common stock | $					$ (2,179,739,000)		$ (2,179,739,000)
Preferred stock, shares outstanding (in shares)					0		0		0
Number of classes of common stock | class					3		3
Share-based compensation | $					$ 1,244,314,000	$ 1,571,000	$ 1,254,448,000	$ 5,348,000
Capitalized share-based compensation expense | $					19,900,000	0	20,000,000	600,000
Unrecognized compensation cost | $					$ 2,170,000,000		$ 2,170,000,000
Unrecognized compensation cost related to outstanding stock options, weighted-average period							2 years 6 months 21 days
Tranche 1 Convertible Note Holders
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum amount of all warrants | $												$ 379,800,000
IPO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of classes of common stock | class											3
2013 and 2020 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock authorized (in shares)					316,700,000		316,700,000
Shares issued under plans (in shares)							62,900,000
Common stock reserved for issuance (in shares)							127,900,000
2020 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares remaining available for issuance (in shares)					125,900,000		125,900,000
2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares reserved for issuance under equity incentive plan							14.00%
Annual increase as a percentage of outstanding shares							5.00%
Conversion of Class B Common Stock into Class A Common
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, conversion basis (in shares)					1		1
Conversion basis, outstanding shares, percentage					80.00%		80.00%
Conversion basis, percentage of aggregate shares outstanding							5.00%
Conversion basis, approval period, death or total disability of founders							9 months
Conversion basis, approval period delay (up to)							18 months
Conversion basis, final conversion date							15 years
Conversion of Class B Common Stock into Class A Common | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion basis, outstanding shares, fixed days							61 days
Conversion basis, aggregate outstanding shares, fixed days							6100.00%
Conversion of Class B Common Stock into Class A Common | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion basis, outstanding shares, fixed days							180 days
Conversion basis, aggregate outstanding shares, fixed days							18000.00%
Conversion of Class C Common Stock into Class A Common
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, conversion basis (in shares)					1		1
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate, percentage							25.00%
Vesting period							4 years
Exercisable, period (up to)							10 years
Share-based compensation | $					$ 1,800,000	0	$ 1,800,000	0
Stock options | Share-based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period							1 year
Time-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				1 year
Unvested restricted stock (in shares)					50,642,853		50,642,853		47,711,649
Forfeited, weighted-average grant date fair value (in dollars per share) | $ / shares							$ 24.37
Granted (in shares)							28,635,488
Granted, Weighted-average grant date fair value (in dollars per share) | $ / shares							$ 40.76
Vested (in shares)							23,261,472
Share-based compensation | $					$ 907,300,000	0	$ 907,300,000	0
Number of employees affected | employee				500
Modified grant date fair value (in dollars per share) | $ / shares				$ 39.75	$ 32.20		$ 32.20		$ 10.84
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			8 years
Exercisable, period (up to)							7 years
Unvested restricted stock (in shares)										27,700,000
Requisite service period										3 months
Forfeited, weighted-average grant date fair value (in dollars per share) | $ / shares										$ 0.29
Weighted-average incremental fair value (in dollars per share) | $ / shares										$ 21.01
Granted (in shares)			35,500,000
Granted, Weighted-average grant date fair value (in dollars per share) | $ / shares			$ 22.68
Consecutive trading days			60 days
RSUs | Share-based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested shares upon achievement of price targets (in shares)			4,500,000							5,600,000
Price targets, vested (in dollars per share) | $ / shares			$ 120							$ 30.45
RSUs | Share-based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested shares upon achievement of price targets (in shares)			5,300,000							8,300,000
Price targets, vested (in dollars per share) | $ / shares			$ 150							$ 50.75
RSUs | Share-based Payment Arrangement, Tranche Two | IPO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested shares upon achievement of price targets (in shares)										4,000,000
RSUs | Share-based Payment Arrangement, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested shares upon achievement of price targets (in shares)										13,800,000
Price targets, vested (in dollars per share) | $ / shares			180							$ 101.50
RSUs | Share-based Payment Arrangement, Tranche Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Price targets, vested (in dollars per share) | $ / shares			210
RSUs | Share-based Payment Arrangement, Tranche Five
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Price targets, vested (in dollars per share) | $ / shares			240
RSUs | Share-based Payment Arrangement, Tranche Six
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Price targets, vested (in dollars per share) | $ / shares			270
RSUs | Share-based Payment Arrangement, Tranche Seven
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Price targets, vested (in dollars per share) | $ / shares			$ 300
2021 Market-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested (in shares)							0
Market-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock (in shares)					59,034,110		59,034,110		27,663,658
Forfeited, weighted-average grant date fair value (in dollars per share) | $ / shares							$ 0
Granted (in shares)							35,520,000
Granted, Weighted-average grant date fair value (in dollars per share) | $ / shares							$ 22.68
Vested (in shares)							4,149,548		0
Share-based compensation | $					$ 360,900,000	$ 0	$ 360,900,000	$ 0
Modified grant date fair value (in dollars per share) | $ / shares					$ 23.46		$ 23.46		$ 0.29
Employee Stock | 2021 ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual increase as a percentage of outstanding shares		1.00%
Shares of common stock authorized (in shares)		200,000,000
Maximum payroll deduction for ESPP, percentage		15.00%
ESPP purchase price discount, percentage		85.00%
Percentage of shares outstanding after close of offering		2.00%
Number of share purchased (in shares)							0
Share available for future issuance under the ESPP (in shares)					17,000,000		17,000,000
Series G-1
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Redeemable convertible preferred stock, authorized (in shares)												244,300,000
Redeemable convertible preferred stock, issued (in shares)												0
Redeemable convertible preferred stock, outstanding (in shares)												0
Common Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion basis	1
Number of voting rights per share | vote					1		1
Common Class A | IPO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate warrants exercisable (in shares)											14,300,000
Exercise price (in dollars per share) | $ / shares											$ 26.60
Redeemable convertible preferred stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Redeemable convertible preferred stock, issued (in shares)					0		0
Redeemable convertible preferred stock, outstanding (in shares)		412,742,897			0	412,742,897	0	412,742,897	412,742,897	321,626,778			366,266,778
Conversion of preferred stock to common stock | $	$ 2,180,000,000				$ 2,179,739,000		$ 2,179,739,000
Common Class B
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of voting rights per share | vote					10		10
Series F
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Redeemable convertible preferred stock, authorized (in shares)									48,000,000
Redeemable convertible preferred stock, issued (in shares)									48,000,000
Redeemable convertible preferred stock, outstanding (in shares)									48,000,000
Per Share Liquidation Preference (in dollars per share) | $ / shares									$ 12.5000
Series A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Redeemable convertible preferred stock, authorized (in shares)									131,913,460
Redeemable convertible preferred stock, issued (in shares)									131,913,460
Redeemable convertible preferred stock, outstanding (in shares)									131,913,460
Per Share Liquidation Preference (in dollars per share) | $ / shares									$ 0.1954

MEZZANINE EQUITY, COMMON STOC_5

MEZZANINE EQUITY, COMMON STOCK AND STOCKHOLDERS' (DEFICIT) EQUITY - SCHEDULE OF STOCK OPTION ACTIVITY (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Number of Shares
Beginning balance (in shares)	21,543,828
Granted during the period (in shares)	0
Exercised during the period (in shares)	(5,819,965)
Cancelled and forfeited during the period (in shares)	(276,657)
Ending balance (in shares)	15,447,206	21,543,828
Options vested and expected to vest (in shares)	15,447,206
Options exercisable (in shares)	14,040,377
Weighted-Average Exercise Price
Beginning balance, Weighted-Average Exercise Price (in dollars per share)	$ 2.19
Granted during the period, Weighted-Average Exercise Price (in dollars per share)	0
Exercised during the period, Weighted-Average Exercise Price (in dollars per share)	2.02
Cancelled and forfeited during the period, Weighted-Average Exercise Price (in dollars per share)	4.51
Ending balance, Weighted-Average Exercise Price (in dollars per share)	2.21	$ 2.19
Options vested and expected to vest, Weighted-Average Exercise Price (in dollars per share)	2.21
Options exercisable, Weighted-Average Exercise Price (in dollars per share)	$ 1.79
Weighted- Average Remaining Life
Weighted- Average Remaining Life	5 years 7 months 28 days	6 years 6 months 7 days
Options vested and expected to vest, Weighted-Average Remaining Life	5 years 7 months 28 days
Options exercisable, Weighted-Average Remaining Life	5 years 5 months 26 days
Total Intrinsic Value (in thousands)
Total Intrinsic Value (in thousands)	$ 615,827	$ 304,590
Options vested and expected to vest, Total Intrinsic Value	615,827
Options exercisable, Total Intrinsic Value	$ 565,754

MEZZANINE EQUITY, COMMON STOC_6

MEZZANINE EQUITY, COMMON STOCK AND STOCKHOLDERS' (DEFICIT) EQUITY - SCHEDULE OF ACTIVITY RELATED TO TIME-BASED AND MARKET-BASED RSUs (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
Time-Based RSUs
Number of RSUs
Unvested restricted stock, beginning balance (in shares)		47,711,649
Granted (in shares)		28,635,488
Vested (in shares)		(23,261,472)
Forfeited (in shares)		(2,442,812)
Unvested restricted stock, ending balance (in shares)	50,642,853	50,642,853	47,711,649
Weighted- average grant date fair value
Unvested restricted stock, Weighted-average grant date fair value, beginning balance (in dollars per share)		$ 10.84
Granted, Weighted-average grant date fair value (in dollars per share)		40.76
Vested, Weighted-average grant date fair value (in dollars per share)		17.94
Forfeited, weighted-average grant date fair value (in dollars per share)		24.37
Unvested restricted stock, Weighted-average grant date fair value, ending balance (in dollars per share)	$ 32.20	$ 32.20	$ 10.84
Share-based Payment Award, Vested	$ 898,800,000	$ 898,800,000	$ 0
Market-Based RSUs
Number of RSUs
Unvested restricted stock, beginning balance (in shares)		27,663,658
Granted (in shares)		35,520,000
Vested (in shares)		(4,149,548)	0
Forfeited (in shares)		0
Unvested restricted stock, ending balance (in shares)	59,034,110	59,034,110	27,663,658
Weighted- average grant date fair value
Unvested restricted stock, Weighted-average grant date fair value, beginning balance (in dollars per share)		$ 0.29
Granted, Weighted-average grant date fair value (in dollars per share)		22.68
Vested, Weighted-average grant date fair value (in dollars per share)		2.34
Forfeited, weighted-average grant date fair value (in dollars per share)		0
Unvested restricted stock, Weighted-average grant date fair value, ending balance (in dollars per share)	$ 23.46	$ 23.46	$ 0.29
Share-based Payment Award, Vested	$ 157,400,000	$ 157,400,000

MEZZANINE EQUITY, COMMON STOC_7

MEZZANINE EQUITY, COMMON STOCK AND STOCKHOLDERS' (DEFICIT) EQUITY - SCHEDULE OF SHARE-BASED COMPENSATION (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation	$ 1,244,314	$ 1,571	$ 1,254,448	$ 5,348
Brokerage and transaction
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation	6,405	6	6,417	18
Technology and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation	502,748	992	504,773	3,532
Operations
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation	16,410	5	16,416	23
Marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation	40,966	40	41,044	55
General and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation	$ 677,785	$ 528	$ 685,798	$ 1,720

NET LOSS PER SHARE - CALCULATIO

NET LOSS PER SHARE - CALCULATION OF BASIC AND DILUTED INCOME (LOSS) PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net loss	$ (1,316,697)	$ (10,661)	$ (3,263,165)	$ (5,579)
Less: allocation of earnings to participating securities	0	0	0	0
Net loss attributable to common stockholders	(1,316,697)	(10,661)	(3,263,165)	(5,579)
Net loss attributable to common stockholders	$ (1,316,697)	$ (10,661)	$ (3,263,165)	$ (5,579)
Weighted-average common stock outstanding - basic (in shares)	638,168,188	225,997,444	368,518,894	225,299,165
Dilutive effect of stock options and unvested shares (in shares)	0	0	0	0
Weighted-average common stock outstanding - diluted (in shares)	638,168,188	225,997,444	368,518,894	225,299,165
Net loss per share attributable to common stockholders:
Net income (loss) per share attributable to common stockholders, Diluted (in dollars per share)	$ (2.06)	$ (0.05)	$ (8.85)	$ (0.02)
Net income (loss) per share attributable to common stockholders, Basic (in dollars per share)	$ (2.06)	$ (0.05)	$ (8.85)	$ (0.02)

NET LOSS PER SHARE - POTENTIAL

NET LOSS PER SHARE - POTENTIAL COMMON SHARES EXCLUDED FROM THE CALCULATION OF DILUTED NET INCOME (LOSS) PER SHARE (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	142,376,772	503,485,347	142,376,772	503,485,347
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	112,492,359	65,598,613	112,492,359	65,598,613
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	15,447,206	24,836,871	15,447,206	24,836,871
Unvested shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	65,435	306,966	65,435	306,966
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	14,278,034	0	14,278,034	0
ESPP shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	93,738	0	93,738	0
Redeemable convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities (in shares)	0	412,742,897	0	412,742,897

RELATED PARTY TRANSACTIONS (Det

RELATED PARTY TRANSACTIONS (Details)	Sep. 30, 2021party	Feb. 28, 2021tranche
Convertible notes
Related Party Transaction [Line Items]
Number of tranches issued		2
Investor
Related Party Transaction [Line Items]
Number of related parties | party	2
Investor | Convertible notes
Related Party Transaction [Line Items]
Number of tranches issued		2

COMMITMENTS AND CONTINGENCIES -

COMMITMENTS AND CONTINGENCIES - NARRATIVE (Details) $ in Thousands	Jun. 30, 2021USD ($)	Jan. 28, 2021lawsuit	Dec. 31, 2020USD ($)lawsuit	Sep. 30, 2021USD ($)plaintiffoption	Jul. 31, 2021lawsuit	Jan. 31, 2021tranche	Dec. 31, 2020USD ($)tranche	Mar. 31, 2020plaintifflawsuit
Lessee, Lease, Description [Line Items]
Number of renewal options (or more) | option				1
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]			Other non-current assets	Other non-current assets			Other non-current assets
Operating lease right-of-use assets			$ 49,200	$ 158,100			$ 49,200
Total lease liabilities			$ 54,100	$ 154,537			$ 54,100
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]			Other current liabilities	Other current liabilities			Other current liabilities
Operating lease liabilities			$ 6,100	$ 20,200			$ 6,100
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]			Other non-current liabilities	Other non-current liabilities			Other non-current liabilities
Operating lease liabilities, net of current portion			$ 48,000	$ 134,300			$ 48,000
Accrued for legal and regulatory contingencies			$ 39,500	$ 33,100			$ 39,500
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term				1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term				12 years
Massachusetts Securities Law Violations
Lessee, Lease, Description [Line Items]
Number of lawsuits | tranche							3
Best Execution, Payment for Order Flow, and Source of Revenue Matters | Unfavorable Regulatory Action
Lessee, Lease, Description [Line Items]
Fine, amount							$ 65,000
Penalty paid in cash							$ 65,000
Putative Securities Fraud Class Action Lawsuit
Lessee, Lease, Description [Line Items]
Number of lawsuits | lawsuit			7
Putative Class Actions
Lessee, Lease, Description [Line Items]
Number of lawsuits | lawsuit		55						15
Number of customers | tranche						2,000
Individual Action
Lessee, Lease, Description [Line Items]
Number of lawsuits | lawsuit		4						1
March 2020 Outages
Lessee, Lease, Description [Line Items]
Number of customers | plaintiff				400				1,600
FINRA Multi-Matter Settlement | Unfavorable Regulatory Action
Lessee, Lease, Description [Line Items]
Accrued for legal and regulatory contingencies	$ 57,000
Fine, amount	57,000
FINRA Multi-Matter Settlement | Unfavorable Regulatory Action, Customer Restitution
Lessee, Lease, Description [Line Items]
Fine, amount	$ 12,600
Consolidated Claims
Lessee, Lease, Description [Line Items]
Number of lawsuits | lawsuit					2

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES - SCHEDULE OF COMPONENTS OF LEASE EXPENSE, OTHER INFORMATION AND CASH FLOWS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Lease, Cost [Abstract]
Fixed operating lease costs	$ 7,115	$ 2,971	$ 15,905	$ 8,034
Variable operating lease costs	1,232	791	3,684	2,218
Short-term lease costs	457	266	1,067	579
Total lease costs	$ 8,804	$ 4,028	$ 20,656	10,831
Weighted Average Remaining Lease Term and Discount Rate [Abstract]
Weighted-average remaining lease term	7 years 5 months 15 days		7 years 5 months 15 days		5 years 4 months 28 days
Weighted-average discount rate	6.27%		6.27%		7.02%
Operating cash flows:
Payments for operating lease liabilities			$ 240	11,238
Supplemental cash flow data:
Lease liabilities arising from obtaining right-of-use assets			$ 96,519	$ 14,991

COMMITMENTS AND CONTINGENCIES_3

COMMITMENTS AND CONTINGENCIES - SCHEDULE OF FUTURE MINIMUM LEASE PAYMENTS (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Remainder of 2021	$ 5,807
2022	32,646
2023	34,821
2024	33,355
2025	32,436
Thereafter	125,724
Total undiscounted lease payments	264,789
Less: imputed interest	(44,385)
Less: lease incentives	(12,682)
Less: leases executed but not yet commenced	(53,185)
Total lease liabilities	$ 154,537	$ 54,100