As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

12/20/23  Burritt David B                   4          Dir.,Off.²  1:5K   United States Steel Corp.         DONNELLEY FIN… File16/FA 
12/20/23  Brown Daniel R                    4          Officer²    1:5K   United States Steel Corp.         DONNELLEY FIN… File16/FA 
12/18/23  United States Steel Corp.         DEFA14A                1:6.2M                                   Toppan Merrill/FA        
12/18/23  United States Steel Corp.         DEFA14A                1:4.3M                                   Toppan Merrill/FA        
12/18/23  United States Steel Corp.         DEFA14A                2:771K                                   Toppan Merrill/FA        
12/18/23  United States Steel Corp.         8-K:1,9    12/18/23   12:1.1M                                   Toppan Merrill/FA        
12/18/23  United States Steel Corp.         DEFA14A                1:78K                                    Toppan Merrill/FA        
12/18/23  United States Steel Corp.         DEFA14A                1:25M                                    Toppan Merrill/FA        
12/18/23  United States Steel Corp.         DEFA14A                1:107K                                   Toppan Merrill/FA        
12/18/23  United States Steel Corp.         DEFA14A                1:32K                                    Toppan Merrill/FA        
12/18/23  United States Steel Corp.         DEFA14A                1:378K                                   Toppan Merrill/FA        
12/18/23  United States Steel Corp.         DEFA14A                1:633K                                   Toppan Merrill/FA        
12/18/23  Burritt David B                   144                    1:6K   United States Steel Corp.         Merrill Lynch/Fi… Ops/FA 
12/18/23  Brown Daniel R                    144                    1:7K   United States Steel Corp.         Fidelity Brokera… LLC/FA 
12/18/23  United States Steel Corp.         DEFA14A                3:4.3M                                   Toppan Merrill/FA        
12/18/23  United States Steel Corp.         8-K:7,8,9  12/18/23   13:4.6M                                   Toppan Merrill/FA        

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¹	Filing/Form Types:
	4	Statement of Changes in Beneficial Ownership of Securities by an Insider — Form 4 { The Filer is an Insider² of the Issuer }.
	8-K	Current Report — Form 8-K { Item 1: Business & Operations;  2: Financial Info;  3: Securities & Trading;  4: Accountants & Accounting;  5: Governance & Management;  6: Asset-Backed Securities;  7: Disclosures;  8: Events;  9: Financials }.
	144	Notice of a Proposed Sale of Securities by an Insider — Form 144 { The Filer is an Insider² of the Issuer }.
	DEFA14A	Definitive Additional Proxy Soliciting Material — Schedule 14A.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.