Company: SLG-PI
Filing Date: 2025-04-22
Form Type: DEFA14A
Source: 0001104659-25-037540
Chunk: 0

Company: SL GREEN REALTY CORP
Filing Date: 2025-04-22
Form: DEFA14A
Chunk 0
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<div align='center'>UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of
the
Securities Exchange Act of 1934 (Amendment No. )</div>

| ☑ | Filed by the Registrant | ☐ | Filed by a party other than the Registrant |

| CHECK                
 THE APPROPRIATE BOX: |     |                                         |
| ☐                    |     | Preliminary Proxy Statement             |
| ☐                    |     | Confidential, for Use of the Commission 
 Only (as permitted by Rule 14a-6(e)(2)) |
| ☐                    |     | Definitive Proxy Statement              |
| ☑                    |     | Definitive Additional Materials         |
| ☐                    |     | Soliciting Material under §240.14a-12   |

<div align='center'>SL Green Realty Corp.

(Name of Registrant as Specified In Its Charter)
(Name of Person(s) Filing Proxy Statement, if other than the Registrant)</div>

| PAYMENT OF FILING FEE (CHECK ALL BOXES THAT APPLY): |     |                                                                                                     |
| ☑                                                   |     | No fee required                                                                                     |
| ☐                                                   |     | Fee paid previously with preliminary materials                                                      |
| ☐                                                   |     | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11 |

| Your Vote Counts!                                                                                                                                                
 *Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares. 
 Smartphone users                                                                                                                                                 
 Point your camera here and                                                                                                                                       
 vote without entering a                                                                                                                                          
 control number                                                                                                                                                   
 For complete information and to vote, visit www.ProxyVote.com                                                                                                    
 Control #                                                                                                                                                        
 V72112-P27148                                                                                                                                                    
 SL GREEN REALTY CORP.                                                                                                                                            
 2025 Annual Meeting                                                                                                                                              
 Vote by June 2, 2025                                                                                                                                             
 11:59 PM ET                                                                                                                                                      
 You invested in SL GREEN REALTY CORP. and it’s time to vote!                                                                                                     
 You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the                                         
 availability of proxy materials for the stockholder meeting to be held on June 3, 2025.                                                                          
 Get