<PAGE>



            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
                                    
                                    
                                    
                                    
                                    
                                    
                            December 18, 1995
                                    
                                    
                                    
                                    
                                    
                         Mallinckrodt Group Inc.
         (Exact name of registrant as specified in its charter)
                                    
                                    
          New York                  1-483           36-1263901
(State or other jurisdiction     (Commission     (I.R.S. Employer
    of incorporation)            File Number)    Identification No.)
   

 7733 Forsyth Boulevard, St. Louis, MO                63105-1820
(Address of principal executive offices)              (ZIP Code)


Registrant's telephone number,                     (314)854-5200
     including area code


<PAGE>

Item 5.  Other Events

The Company issued a press release on December 18, 1995. The relevant portion 
of the text was as follows:

MALLINCKRODT NAMES NICHOLS CHIEF OPERATING OFFICER; TWO OTHER OFFICERS  
APPOINTED

ST. LOUIS, Mo., December 18, 1995 -- Mallinckrodt Group Inc. Chairman and 
Chief Executive Officer C. Ray Holman today announced the appointment of three 
corporate officers as part of a strategic initiative designed to ensure the 
company's continued achievement of exceptional growth in sales and 
profitability driven by innovation and productivity.  

     Mack G. Nichols has been appointed president, chief operating officer 
and elected to the board of directors.  Nichols, previously president of 
Mallinckrodt Chemical, will have full responsibility for Mallinckrodt Group's 
worldwide operations.

     Robert G. Moussa continues as a senior vice president of Mallinckrodt 
Group and has been named president, international to lead the company's 
ambitious globalization program.  Moussa was previously president of 
Mallinckrodt Medical.  J. Eugene Fox, Ph.D., has been appointed vice 
president, science and technology and will coordinate the development and 
introduction of leading-edge technologies and products.  He was previously 
senior vice president, science and technology, of Mallinckrodt Medical.

     "In addition to consolidating all of our business operations under one
corporate officer, the changes establish new leadership for international 
expansion and technological innovation, the two areas where we have the 
greatest opportunities for sales growth,"  Holman said.  The appointments 
are effective immediately.

     "We're confident that Mack Nichols will continue his superior business
leadership which consistently has produced excellent operating performance 
during his 16 years with our company," Holman said.

     "Consolidating all operating activities under the chief operating 
officer, combined with eliminating a complete organizational level, will 
result in a flatter organization, providing greater speed of decisions and 
actions and less duplication of services at all levels of the company.  
We expect to realize substantial productivity enhancements and lower costs 
from these initiatives and we remain confident in achieving our financial 
objectives for 1996 and beyond."  

     Mallinckrodt Group is a St. Louis-based company with fiscal 1995 net 
sales of $2.2 billion.  Through its technology-based businesses, it provides 
human and animal health products and specialty chemicals.  Mallinckrodt has 
approximately 10,300 employees worldwide.


MALLINCKRODT GROUP INC.



ROGER A. KELLER
- -------------------------
Roger A. Keller
Vice President, Secretary 
  and General Counsel


DATE:  December 20, 1995
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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
                                    
                                    
                                    
                                    
                                    
                                    
                            December 18, 1995
                                    
                                    
                                    
                                    
                                    
                         Mallinckrodt Group Inc.
         (Exact name of registrant as specified in its charter)
                                    
                                    
          New York                  1-483           36-1263901
(State or other jurisdiction     (Commission     (I.R.S. Employer
    of incorporation)            File Number)    Identification No.)
   

 7733 Forsyth Boulevard, St. Louis, MO                63105-1820
(Address of principal executive offices)              (ZIP Code)

Registrant's telephone number,                     (314)854-5200
     including area code
Item 5.  Other Events

The Company issued a press release on December 18, 1995. The relevant portion 
of the text was as follows:

MALLINCKRODT NAMES NICHOLS CHIEF OPERATING OFFICER; TWO OTHER OFFICERS  
APPOINTED

ST. LOUIS, Mo., December 18, 1995 -- Mallinckrodt Group Inc. Chairman and 
Chief Executive Officer C. Ray Holman today announced the appointment of three 
corporate officers as part of a strategic initiative designed to ensure the 
company's continued achievement of exceptional growth in sales and 
profitability driven by innovation and productivity.  

     Mack G. Nichols has been appointed president, chief operating officer 
and elected to the board of directors.  Nichols, previously president of 
Mallinckrodt Chemical, will have full responsibility for Mallinckrodt Group's 
worldwide operations.

     Robert G. Moussa continues as a senior vice president of Mallinckrodt 
Group and has been named president, international to lead the company's 
ambitious globalization program.  Moussa was previously president of 
Mallinckrodt Medical.  J. Eugene Fox, Ph.D., has been appointed vice 
president, science and technology and will coordinate the development and 
introduction of leading-edge technologies and products.  He was previously 
senior vice president, science and technology, of Mallinckrodt Medical.

     "In addition to consolidating all of our business operations under one
corporate officer, the changes establish new leadership for international 
expansion and technological innovation, the two areas where we have the 
greatest opportunities for sales growth,"  Holman said.  The appointments 
are effective immediately.

     "We're confident that Mack Nichols will continue his superior business
leadership which consistently has produced excellent operating performance 
during his 16 years with our company," Holman said.

     "Consolidating all operating activities under the chief operating 
officer, combined with eliminating a complete organizational level, will 
result in a flatter organization, providing greater speed of decisions and 
actions and less duplication of services at all levels of the company.  
We expect to realize substantial productivity enhancements and lower costs 
from these initiatives and we remain confident in achieving our financial 
objectives for 1996 and beyond."  

     Mallinckrodt Group is a St. Louis-based company with fiscal 1995 net 
sales of $2.2 billion.  Through its technology-based businesses, it provides 
human and animal health products and specialty chemicals.  Mallinckrodt has 
approximately 10,300 employees worldwide.

MALLINCKRODT GROUP INC.

ROGER A. KELLER
- -------------------------
Roger A. Keller
Vice President, Secretary 
  and General Counsel

DATE:  December 20, 1995