UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Form 13F

Form 13F COVER PAGE

Report for Calendar Year or Quarter Ended: June 30, 2001

Check here if Amendment [    ]; Amendment Number:

This Amendment (Check only one.):	[	] is a restatement.
	[	] adds new holdings entries.

Institutional Investment Manager Filing this Report:

Name:	BB Biotech AG
Address:	Vordergasse 3
	Grafenauweg 4
	Zug, Switzerland CH-6301

Form 13F File Number: 28-6964

The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables are considered integral parts of this form. Person Signing this Report on Behalf of Reporting Manager:

Name: Dubravka Racnjak

Title: SIGNING AUTHORITY 

Phone: (41-41) 724-5959

Signature, Place, and Date of Signing:

Zug, Switzerland August 13, 2001

  /s/ Dubravka Racnjak  

Report Type (Check only one.):

[   ]	13F HOLDINGS REPORT. (Check here if all holdings of this reporting
	manager are reported in this report.)
[   ]	13F NOTICE. (Check here if no holdings reported are in this report, and
	all holdings are reported by other reporting manager(s).)
[X]	13F COMBINATION REPORT. (Check here if a portion of the holdings for
	this reporting manager are reported in this report and a portion are
	reported by other reporting manager(s).)

List of Other Managers Reporting for this Manager:

      Name

      Biotech Focus S.A.

      Biotech Invest S.A.

      Biotech Target S.A.

      Biotech Growth S.A.

Form 13F SUMMARY PAGE

Report Summary:

Number of Other Included Managers:	4
Form 13F Information Table Entry Total:	21
Form 13F Information Table Value Total:	$2,177,061
	(thousands)

List of Other Included Managers:

Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report.

No.	Name
1	Biotech Focus S.A.
2	Biotech Invest S.A.
3	Biotech Target S.A.
4	Biotech Growth S.A.

BB BIOTECH AG

FORM 13F INFORMATION TABLE

					COLUMN 4:		COLUMN 5:					COLUMN 6:		COLUMN 7:		COLUMN 8: VOTING AUTHORITY
COLUMN 1:	COLUMN 2:		COLUMN 3:		VALUE		SHRS OR		SH/		PUT/	INVESTMENT		OTHER
NAME OF ISSUER	TITLE OF CLASS		CUSIP		(X$1,000)		PRN AMT		PRN		CALL	DISCRETION		MANAGERS		SOLE		SHARED		NONE
Adolor Corp.		Common Stock		00724X102	$	43,254		2,002,500		SH			DEFINED		3		2,002,500		NONE		NONE
Alexion Pharmaceuticals, Inc.		Common Stock		015351109	$	16,179		674,113		SH			DEFINED		3		674,113		NONE		NONE
Amgen Inc.		Common Stock		00075886F1	$	213,139		3,512,500		SH			DEFINED		1		3,512,500		NONE		NONE
Aviron		Common Stock		05376210	$	177,001		3,105,286		SH			DEFINED		2		3,105,286		NONE		NONE
CV Therapeutics, Inc.		Common Stock		12666710	$	132,077		2,317,147		SH			DEFINED		3		2,317,147		NONE		NONE
Cell Therapeutics, Inc.		Common Stock		150934107	$	25,443		920,500		SH			DEFINED		3		920,500		NONE		NONE
COR Therapeutics Inc.		Common Stock		217753102	$	9,608		315,000		SH			DEFINED		2		315,000		NONE		NONE
3-Dimensional Pharmaceuticals, Inc.		Common Stock		88554W104	$	31,338		3,260,970		SH			DEFINED		4		3,260,970		NONE		NONE
Durect Corporation		Common Stock		266605104	$	29,937		2,302,857		SH			DEFINED		4		2,302,857		NONE		NONE
Endo Pharmaceuticals, Inc.		Common Stock		29264P104	$	12,814		1,449,500		SH			DEFINED		3		1,449,500		NONE		NONE
Genentech		Common Stock		368710406	$	143,282		2,600,394		SH			DEFINED		1		2,600,394		NONE		NONE
GenVec Inc.		Common Stock		37246C109	$	3,670		1,261,185		SH			DEFINED		4		1,261,185		NONE		NONE
IDEC Pharmaceuticals		Common Stock		449370105	$	392,060		5,792,000		SH			DEFINED		1		5,792,000		NONE		NONE
Imclone		Common Stock		45245W109	$	167,825		3,178,500		SH			DEFINED		2		3,178,500		NONE		NONE
Medicines Company (The)		Common Stock		584688105	$	106,647		5,204,837		SH			DEFINED		4		5,204,837		NONE		NONE
MedImmune		Common Stock		584699102	$	538,363		11,406,000		SH			DEFINED		1		11,406,000		NONE		NONE
Neurocrine Biosciences		Common Stock		64125C109	$	53,727		1,343,500		SH			DEFINED		3		1,343,500		NONE		NONE
Third Wave Technologies		Common Stock		88428W108	$	12,125		1,173,800		SH			DEFINED		4		1,173,800		NONE		NONE
Transkaryotic Therapies		Common Stock		89373510	$	21,101		716,500		SH			DEFINED		2		716,500		NONE		NONE
Trimeris Inc.		Common Stock		896263100	$	39,540		789,700		SH			DEFINED		3		789,700		NONE		NONE
Virologic		Common Stock		92823R201	$	7,931		3,605,004		SH			DEFINED		4		3,605,004		NONE		NONE
COLUMN   TOTALS					$	2,177,061