SL Green Realty : 2020 Third Quarter Supplemental Data

SL Green Realty Corp. is a self-managed real estate investment trust, or REIT, with in-house capabilities in property management, acquisitions and dispositions, financing, development, redevelopment, construction and leasing.

As of September 30, 2020, the Company held interests in 93 buildings totaling 40.6 million square feet. This included ownership interests in 29.2 million square feet in Manhattan buildings and 10.3 million square feet securing debt and preferred equity investments.

• SL Green's common stock is listed on the New York Stock Exchange and trades under the symbol SLG.
• SL Green maintains a website athttps://slgreen.com where key investor relations data can be found. This supplemental financial package is available through the Company's website.
• This data is furnished to supplement audited and unaudited regulatory filings of the Company and should be read in conjunction with those filings. The financial data herein is unaudited and is provided to assist readers of quarterly and annual financial filings and should not be read in replacement of, or superior to, such financial filings. As such, data otherwise contained in future regulatory filings covering the same period may restate the data presented herein.

Questions pertaining to the information contained herein should be referred to Investor Relations at [e-mail] or at 212-594-2700.

Ratings

Ratings are not recommendations to buy, sell or hold the Company's securities.

Forward-looking Statements

This supplemental reporting package includes certain statements that may be deemed to be "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 and are intended to be covered by the safe harbor provisions thereof. All statements, other than statements of historical facts, included in this press release that address activities, events or developments that we expect, believe or anticipate will or may occur in the future, are forward-looking statements, including the statements herein under the section entitled "Guidance". These forward- looking statements are based on certain assumptions and analyses made by us in light of our experience and our perception of historical trends, current conditions, expected future developments and other factors we believe are appropriate. Forward-looking statements are not guarantees of future performance and actual results or developments may differ materially, and we caution you not to place undue reliance on such statements. Forward- looking statements are generally identifiable by the use of the words "may," "will," "should," "expect," "anticipate," "estimate," "believe," "intend," "project," "continue," or the negative of these words, or other similar words or terms.

Forward-looking statements contained in this press release are subject to a number of risks and uncertainties, many of which are beyond our control, that may cause our actual results, performance or achievements to be materially different from future results, performance or achievements expressed or implied by forward-looking statements made by us. Factors and risks to our business that could cause actual results to differ from those contained in the forward-looking statements include risks and uncertainties related to the on-goingCOVID-19 pandemic and the duration and impact it will have on our business and the industry as a whole and the other risks and uncertainties described in our filings with the Securities and Exchange Commission. Except to the extent required by law, we undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of future events, new information or otherwise.

The following discussion related to the consolidated financial statements of the Company should be read in conjunction with the financial statements for the quarter ended September 30, 2020 that will be released on Form 10-Q to be filed on or before November 9, 2020.

Supplemental Information

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Third Quarter 2020

TABLE OF CONTENTS

Definitions		4
Highlights	5	-	9
Comparative Balance Sheets		10
Comparative Statements of Operations		12
Comparative Computation of FFO and FAD		13
Consolidated Statement of Equity		14
Joint Venture Statements	15	-	17
Selected Financial Data	18	-	21
Debt Summary Schedule	22	-	23
Lease Liability Schedule		24
Debt and Preferred Equity Investments	25	-	27
Selected Property Data
Composition of Property Portfolio	28	-	32
Largest Tenants		33
Tenant Diversification		34
Leasing Activity Summary	35	-	36
Annual Lease Expirations	37	-	38
Summary of Real Estate Acquisition/Disposition Activity	39	-	44
Corporate Information		45
Non-GAAP Disclosures and Reconciliations		46
Analyst Coverage		49

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DEFINITIONS

Annualized cash rent - Monthly base rent and escalations per the lease, excluding concessions, as of the last day of the quarter, multiplied by 12.

Capitalized Interest - The total of i) interest cost for project specific debt on properties that are under development or redevelopment plus ii) an imputed interest cost for properties that are under development or redevelopment, which is calculated based on the Company's equity investment in those properties multiplied by the Company's weighted average borrowing rate. Capitalized Interest is a component of the book basis in a development or redevelopment property.

Debt service coverage - Operating Income adding back income taxes, loan loss reserves and the Company's share of joint venture depreciation and amortization, divided by total interest and principal payments.

Earnings Before Interest, Taxes, Depreciation and Amortization for Real Estate (EBITDAre) - EBITDAre is a non-GAAPfinancial measure. The Company computes EBITDAre in accordance with standards established by the National Association of Real Estate Investment Trusts, or NAREIT, which may not be comparable to EBITDAre reported by other REITs that do not compute EBITDAre in accordance with the NAREIT definition, or that interpret the NAREIT definition differently than the Company does. The White Paper on EBITDAre approved by the Board of Governors of NAREIT in September 2017 defines EBITDAre as net income (loss) (computed in accordance with Generally Accepted Accounting Principles, or GAAP), plus interest expense, plus income tax expense, plus depreciation and amortization, plus (minus) losses and gains on the disposition of depreciated property, plus impairment write-downsof depreciated property and investments in unconsolidated joint ventures, plus adjustments to reflect the entity's share of EBITDAre of unconsolidated joint ventures.

First generation TIs and LCs - Tenant improvements (TIs), leasing commissions (LCs), and other leasing costs that were taken into consideration when underwriting the acquisition of a property, which are generally incurred during the first 4-5 years following acquisition.

Fixed charge - Total payments for interest, loan principal amortization, ground rent and preferred stock dividends.

Fixed charge coverage - Operating Income adding back income taxes, loan loss reserves and the Company's share of joint venture depreciation and amortization, divided by Fixed Charge.

Funds Available for Distribution (FAD) - FAD is a non-GAAP financial measure that is calculated as FFO plus non-real estate depreciation, allowance for straight line credit loss, adjustment for straight line operating lease rent, non-cash deferred compensation, and a pro- rata adjustment for FAD from the Company's unconsolidated JVs, less straight line rental income, free rent net of amortization, second cycle tenant improvement and leasing costs, and recurring building improvements.

Funds from Operations (FFO) - FFO is a widely recognized non-GAAP financial measure of REIT performance. The Company computes FFO in accordance with standards established by NAREIT, which may not be comparable to FFO reported by other REITs that do not compute FFO in accordance with the NAREIT definition, or that interpret the NAREIT definition differently than the Company does. The revised White Paper on FFO approved by the Board of Governors of NAREIT in April 2002, and subsequently amended, defines FFO as net income (loss) (computed in accordance with GAAP), excluding gains (or losses) from sales of properties, and real estate related impairment charges, plus real estate related depreciation and amortization and after adjustments for unconsolidated partnerships and joint ventures.

Junior Mortgage Participations - Subordinate interests in first mortgages.

Mezzanine Debt - Loans secured by ownership interests in real estate.

Net Operating Income (NOI) and Cash NOI - NOI is a non-GAAPfinancial measure that is calculated as operating income before transaction related costs, gains/losses on early extinguishment of debt, marketing general and administrative expenses and non-realestate revenue. Cash NOI is also a non-GAAPfinancial measure that is calculated by subtracting free rent (net of amortization), straight-linerent, and the amortization of acquired above and below- market leases from NOI, while adding operating lease straight-lineadjustment and the allowance for straight-linetenant credit loss.

Preferred Equity Investments - Equity investments that are senior to common equity and are entitled to preferential returns.

Recurring capital expenditures - Building improvements and leasing costs required to maintain current revenues. Recurring capital expenditures do not include building improvements that were taken into consideration when underwriting the purchase of a building or which are incurred to bring a building up to "operating standards."

Redevelopment costs - Non-recurring capital expenditures incurred to improve buildings to the Company's "operating standards."

Right of Use Assets / Lease Liabilities - Represents the right to control the use of leased property and the corresponding obligation, both measured at inception as the present value of the lease payments. The asset and related liability are classified as either operating or financing based on the length and cost of the lease and whether the lease contains a purchase option or a transfer of ownership. Operating leases are expensed through operating lease rent while financing leases are expensed through amortization and interest expense.

Same-StoreProperties (Same-Store) - Properties owned in the same manner during both the current and prior year, excluding development properties that are not stabilized for both the current and prior year. Changes to Same-Store properties in 2020 are as follows:

Added to Same-Store in 2020:	Removed from Same-Store in 2020:
2 Herald Square	One Madison Avenue (redevelopment)
719	Seventh Avenue	625	Madison Avenue (redevelopment)
650	Fifth Avenue	315	West 34th Street "The Olivia" (disposed)
		762	Madison Avenue (redevelopment)
		400	East 58th Street (disposed)

Second generation TIs and LCs - Tenant improvements, leasing commissions, and other leasing costs that do not meet the definition of first generation TIs and LCs.

SLG Interest - 'SLG Share' or 'Share of JV' is computed by multiplying the referenced line item by the Company's percentage ownership in the respective joint ventures and may not accurately depict the legal and economic implications of holding a non-controlling interest in the joint ventures.

Total square feet owned - The total square footage of properties either owned directly by the Company or in which the Company has a joint venture interest.

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