UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): December 20, 2018

BGC Partners, Inc.

(Exact name of Registrant as specified in its charter)

499 Park Avenue, New York, NY 10022

(Address of principal executive offices)

Registrant’s telephone number, including area code: (212) 610-2200

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

On December 20, 2018, BGC Partners, Inc. (“BGC” or the “Company”) issued a press release announcing that it has updated its post-spin outlook for the full year 2018 and consideration of a reverse stock split of BGC common stock, units, and other share equivalents in the first quarter of 2019, subject to Board approval, at a yet to be determined ratio. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Except as indicated below, the information in this Item 7.01 and Exhibit 99.1 attached to this Current Report on Form 8-K is being furnished under Item 7.01 of Form 8-K. Such information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, except as expressly set forth by specific reference in such filing and as set forth below.

In the press release, BGC uses non-GAAP financial measures including, but not limited to, “pre-tax Adjusted Earnings” and “post-tax Adjusted Earnings,” which are supplemental measures of operating results that are used by management to evaluate the financial performance of the Company and its consolidated subsidiaries. BGC believes that Adjusted Earnings best reflect the operating earnings generated by the Company on a consolidated basis and are the earnings which management considers when managing its business. The following definitions have been updated to reflect only BGC’s continuing operations.

As compared with “income (loss) from continuing operations before income taxes”, and “net income (loss) from continuing operations per fully diluted share”, all prepared in accordance with GAAP, Adjusted Earnings calculations primarily exclude certain non-cash items and other expenses that generally do not involve the receipt or outlay of cash by the Company and/or which do not dilute existing stockholders, as described below. In addition, Adjusted Earnings calculations exclude certain gains and charges that management believes do not best reflect the ordinary results of BGC.

Adjustments Made to Calculate Pre-Tax Adjusted Earnings

BGC defines pre-tax Adjusted Earnings as GAAP income (loss) from continuing operations before income taxes and noncontrolling interest in subsidiaries, excluding items such as:

Virtually all of BGC’s key executives and producers have partnership or equity stakes in the Company and receive deferred equity or limited partnership units as part of their compensation. A significant percentage of the Company’s fully diluted shares are owned by its executives, partners and employees. The Company issues limited partnership units and grant exchangeability to unit holders to provide liquidity to its employees, to align the interests of its employees and management with those of common stockholders, to help motivate and retain key employees, and to encourage a collaborative culture that drives cross-selling and revenue growth.

When the Company issues limited partnership units, the shares of common stock into which the units can be ultimately exchanged are included in BGC’s fully diluted share count for Adjusted Earnings at the beginning of the subsequent quarter after the date of grant. BGC includes such shares in the Company’s fully diluted share count when the unit is granted because the unit holder could be granted the ability to exchange their units into shares of common stock in the future. Generally, unit holders are expected to be paid a pro rata distribution based on BGC’s calculation of Adjusted Earnings per fully diluted share. Non-cash charges with respect to grants of exchangeability reflect the value of the shares of common stock into which the unit is exchangeable when the unit holder is granted exchangeability not previously expensed in accordance with GAAP. The amount of non-cash charges relating to grants of exchangeability the Company uses to calculate pre-tax Adjusted Earnings on a quarterly basis is based upon the Company’s estimate of expected grants of exchangeability to limited partnership units during the annual period, as described further below under “Adjustments Made to Calculate Post-Tax Adjusted Earnings.”

Additionally, Adjusted Earnings calculations exclude certain unusual, one-time, non-ordinary or non-recurring items, if any. These items are excluded from Adjusted Earnings because the Company views excluding such items as a better reflection of the ongoing operations of BGC. BGC’s definition of Adjusted Earnings also excludes certain gains and charges with respect to acquisitions, dispositions, or resolutions of litigation. Management believes that excluding such gains and charges also best reflects the ongoing performance of BGC.

Adjustments Made to Calculate Post-Tax Adjusted Earnings

Although Adjusted Earnings are calculated on a pre-tax basis, BGC also reports post-tax Adjusted Earnings. The Company defines post-tax Adjusted Earnings as pre-tax Adjusted Earnings reduced by the non-GAAP tax provision described below and Adjusted Earnings attributable to noncontrolling interest in subsidiaries.

The Company calculates its tax provision for post-tax Adjusted Earnings using an annual estimate similar to how it accounts for its income tax provision under GAAP. To calculate the quarterly tax provision under GAAP, BGC estimates its full fiscal year GAAP income (loss) from continuing operations before income taxes and noncontrolling interests in subsidiaries and the expected inclusions and deductions for income tax purposes, including expected grants of exchangeability to limited partnership units during the annual period. The resulting annualized tax rate is applied to BGC’s quarterly GAAP income (loss) from continuing operations before income taxes and noncontrolling interests in subsidiaries. At the end of the annual period, the Company updates its estimate to reflect the actual tax amounts owed for the period.

To determine the non-GAAP tax provision, BGC first adjusts pre-tax Adjusted Earnings by recognizing any, and only, amounts for which a tax deduction applies under applicable law. The amounts include non-cash charges with respect to grants of exchangeability; certain charges related to employee loan forgiveness; certain net operating loss carryforwards when taken for statutory purposes; certain charges related to tax goodwill amortization; and deductions with respect to charitable contributions. These adjustments may also reflect timing and measurement differences, including treatment of employee loans, changes in the value of units between the dates of grants of exchangeability and the date of actual unit exchange, variations in the value of certain deferred tax assets and liabilities and the different timing of permitted deductions for tax under GAAP and statutory tax requirements.

After application of these previously described adjustments, the result is the Company’s taxable income for its pre-tax Adjusted Earnings, to which BGC then applies the statutory tax rates to determine its non-GAAP tax provision. BGC’s effective tax rate on pre-tax Adjusted Earnings is equal to the amount of its non-GAAP tax provision divided by the amount of pre-tax Adjusted Earnings.

Generally, the most significant factor affecting this non-GAAP tax provision is the amount of non-cash charges relating to the grants of exchangeability to limited partnership units. Because the non-cash charges relating to the grants of exchangeability are deductible in accordance with applicable tax laws, increases in exchangeability have the effect of lowering the Company’s non-GAAP effective tax rate and thereby increasing its post-tax Adjusted Earnings.

Management uses post-tax Adjusted Earnings in part to help it evaluate, among other things, the overall performance of the business, to make decisions with respect to the Company’s operations, and to determine the amount of dividends payable to common stockholders and distributions payable to holders of limited partnership units.

BGC incurs income tax expenses based on the location, legal structure and jurisdictional taxing authorities of each of its subsidiaries. Certain of the Company’s entities are taxed as U.S. partnerships and are subject to the Unincorporated Business Tax (“UBT”) in New York City. Any U.S. federal and state income tax liability or benefit related to the partnership income or loss, with the exception of UBT, rests with the unit holders rather than with the partnership entity. The Company’s consolidated financial statements include U.S. federal, state and local income taxes on the Company’s allocable share of the U.S. results of operations. Outside of the U.S., BGC operates principally through subsidiary corporations subject to local income taxes. For these reasons, taxes for Adjusted Earnings are expected to be presented to show the tax provision the consolidated Company would expect to pay if 100 percent of earnings were taxed at global corporate rates.

Adjusted Earnings Attributable to Noncontrolling Interest in Subsidiaries

Adjusted Earnings attributable to noncontrolling interest in subsidiaries is calculated based on the relevant noncontrolling interest existing on the balance sheet date. Noncontrolling interest will reflect the pro-rata ownership of certain shares and/or units of BGC.

Calculations of Post-Tax Adjusted Earnings per Common Share

BGC’s Post-Tax Adjusted Earnings per common share calculations assume either that:

The share count for Adjusted Earnings excludes certain shares expected to be issued in future periods but not yet eligible to receive dividends and/or distributions. Each quarter, the dividend payable to BGC’s common stockholders, if any, is expected to be

determined by the Company’s Board of Directors with reference to a number of factors, including post-tax Adjusted Earnings per common share. BGC may also pay a pro-rata distribution of net income to limited partnership units, as well as to Cantor for its noncontrolling interest. The amount of this net income, and therefore of these payments per unit, would be determined using the above definition of post-tax Adjusted Earnings per common share.

The declaration, payment, timing and amount of any future dividends payable by the Company will be at the discretion of its Board of Directors.

Other Matters with Respect to Adjusted Earnings

The term “Adjusted Earnings” should not be considered in isolation or as an alternative to GAAP net income (loss). The Company views Adjusted Earnings as a metric that is not indicative of liquidity or the cash available to fund its operations, but rather as a performance measure. Pre- and post-tax Adjusted Earnings, as well as related measures, are not intended to replace the Company’s presentation of its GAAP financial results. However, management believes that these measures help provide investors with a clearer understanding of BGC’s financial performance and offer useful information to both management and investors regarding certain financial and business trends related to the Company’s financial condition and results of operations. Management believes that Adjusted Earnings measures and the GAAP measures of financial performance should be considered together.

BGC anticipates providing forward-looking guidance for GAAP revenues and for certain Adjusted Earnings measures from time to time. However, the Company does not anticipate providing an outlook for other GAAP results. This is because certain GAAP items, which are excluded from Adjusted Earnings, are difficult to forecast with precision before the end of each period. The Company therefore believes that it is not possible to forecast GAAP results or to quantitatively reconcile GAAP results to non-GAAP results with sufficient precision unless BGC makes unreasonable efforts. The items that are difficult to predict on a quarterly basis with precision and which can have a material impact on the Company’s GAAP results include, but are not limited, to the following:

See BGC’s most recent financial results press release and investor presentations titled “Reconciliation of GAAP income (loss) to Adjusted Earnings”, “Differences between Consolidated Results for Adjusted Earnings and GAAP”, “Reconciliation of BGC Partners, Inc. Consolidated to Post-Spin BGC Partners, Inc. for Revenues”, and “Reconciliation of BGC Partners, Inc. Consolidated to Post-Spin BGC Partners, Inc. for Pre-Tax Adjusted Earnings” for more information on BGC’s non-GAAP results and BGC’s post-spin results.

The information set forth under the headings “Dividend Policy” and “Potential Reverse Split” set forth in Exhibit 99.1 to this Current Report on Form 8-K is being filed under Item 7.01 of Form 8-K and shall be deemed incorporated by reference in any filing under the Securities Act, except as expressly set forth by specific reference in such filing. All other information set forth in Exhibit 99.1 is being furnished.

Discussion of Forward-Looking Statements about BGC

Statements contained or incorporated by reference herein regarding BGC, expected dividend levels, the potential reverse stock split, or BGC’s non-GAAP financial measures that are not historical facts are “forward-looking statements” that involve risks and uncertainties, which could cause actual results to differ from those contained in the forward-looking statements. Except as required by law, BGC undertakes no obligation to update any forward-looking statements. For a discussion of additional risks and uncertainties, which could cause actual results to differ from those contained in the forward-looking statements, see BGC’s Securities and Exchange Commission filings, including, but not limited to, the risk factors set forth in these filings and any updates to such risk factors contained in subsequent Forms 10-K, Forms 10-Q or Forms 8-K.

(d) Exhibits

The exhibit index set forth below is incorporated by reference in response to this Item 9.01.

EXHIBIT INDEX

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report on Form 8-K to be signed on its behalf by the undersigned hereunto duly authorized.

[Signature Page to Form 8-K, dated December 20, 2018, regarding updated Outlook]