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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
707511	Regenerx Biopharmaceuticals Inc	RGRX.OB	Pharmaceutical Preparations (2834)	521253406

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1092601	Spa Finanziaria Tau Sigma	Via Sudafrica, 20 Rome L6 00144		No	No	Yes	No
1168857	Lda Farmaceutica Defiante	1 New York Street New York NY 10005		No	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2011-01-05	925,926	$0.27	12,937,111	No	4	P	Indirect	Indirect

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	Indirect

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Common Stock Warrants (right to buy)	Acquisiton	2011-01-05	1	$0.00	370,370	$0.38
Common Stock	Common Stock Warrants (right to buy)	Disposition	2011-01-05	1	$0.00	256,148	$4.06
Common Stock	Common Stock Warrants (right to buy)	Acquisiton	2011-01-05	1	$0.00	256,148	$0.38
Common Stock	Common Stock Warrants (right to buy)	Disposition	2011-01-05	1	$0.00	333,333	$2.75
Common Stock	Common Stock Warrants (right to buy)	Acquisiton	2011-01-05	1	$0.00	333,333	$0.38

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
1	2011-07-07	2016-01-07	No	4	J	Indirect
0		2011-03-16	No	4	J	Indirect
1		2011-12-31	No	4	J	Indirect
0		2011-12-21	No	4	J	Indirect
2		2011-12-31	No	4	J	Indirect

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	984,615	Direct

Footnotes

Securities directly owned by Defiante Farmaceutica S.A. ("Defiante"). Defiante is 58% directly owned by Sigma Tau Finanziaria S.p.A. ("Sigma Tau") and 42% directly owned by Sigma Tau's wholly-owned subsidiary, Sigma Tau International S.A.
The Warrant was issued by the Issuer to Defiante in consideration of Defiante's purchase of Common Stock.
The two reported transactions involved an amendment of an outstanding warrant, resulting in the deemed cancellation of the "old" warrant and the issuance of a replacement warrant. The warrant became exercisable on September 16, 2006.
The two reported transactions involved an amendment of an outstanding warrant, resulting in the deemed cancellation of the "old" warrant and the issuance of a replacement warrant. The warrant became exercisable on December 21, 2006.