Disclosure of Shareholdings

Submited, 18/06/2026   Notification ID: 77b1d1cb-63b3-4b8f-b0f1-bb767e0006e7   Disclosure notification concerning a single investor
Name of listed company

BB Biotech AG
  PART 1: PERSON SUBJECT TO REPORTING OBLIGATION Last name, first name, place of residence or company name and head office of the beneficial owner (art. 120 para. 1 FMIA) and/ or of the person who has the discretionary power to exercise the voting rights (art. 120 para. 3 FMIA): Company: Saba Capital Management, L.P City: New York Country: United States of America (the)   PART 2: IN CASE OF INDIRECT PARTICIPATION Last name, first name, place of residence or company name and head office of the person/s directly involved   PART 3: DATE AND REASON FOR THE REPORTING OBLIGATION Date of the act that creates the obligation to notify: 17.06.2025 Facts and circumstances triggering the obligation to notify (art. 22 para. 1 b FMIO-FINMA): X Acquisition Sale Creation of a group Change in group composition Termination of a group Discretionary exercise of voting rights Securities lending and comparable transactions Exercise, non-exercise or expiration of derivative holdings Granting (writing) of derivative holdings Capital increase Capital reduction Ipso jure transfer or transfer due to a decision by a court or public authority Change in the information subject to the obligation to notify Other 


Total of voting rights below 3% If the participation falls below the threshold of 3% (purchase positions and sale positions), no indication in Part 4 or Part 5 is required. Total of voting rights <3%   PART 4: PURCHASE POSITIONS PURSUANT TO ART. 14 PARA. 1 A FMIO-FINMA   Total of all purchase positions: Total of all equity securities or equity related securities (item 1), number of voting rights that can be exercised at one’s own discretion (item 3) and derivative holdings (item 4)

Number of voting rights	Percentage
S1 = [1.1] + [3.1] + [4.1]	S2 = [1.2] + [3.2] + [4.2]
1,697,636	3.064%

  Basis of calculation (art. 14 para. 2 FMIO-FINMA): total number of voting rights pursuant to the entry in the commercial register (see Central Business Names Index) or Publication according to art. 115 para. 3 FMIO:  55,400,000 
  Equity securities or equity related securities  

Shares	Number	Voting rights1
		Number	Percentage2
Registered share	503,638	503,638	0.909%
Total		[1.1] 503,638	[1.2] 0.909%

Whether exercisable or not Calculated on the basis of the total number of voting rights pursuant to the entry in the commercial register (art. 14 para. 2 FMIO-FINMA)   Securities lending and comparable transactions in equity securities Of the equity securities mentioned in item 1 above, the following part is held due to securities lending and comparable transactions (art. 17 FMIO-FINMA):  

Shares

Number

Proportion of voting rights

Nature of the legal transaction

Agreed date of return transfer or, if there is a right to choose, whether this applies to the contracting party subject to the obligation to notify or to the counterparty

  Voting rights that can be exercised at one's own discretion The following voting rights were delegated by a third party and can be exercised at one's own discretion.   Voting rights Is the person who has full discretionary powers to exercise voting rights directly or indirectly controlled? Yes  No   Derivative holdings Conversion and share purchase rights (such as call-options according to art. 15 para. 2 a FMIO-FINMA), granted (written) share sale rights and other derivative holdings:  

Type of rights	Number of rights	Number of voting rights conferred		Security ID number (ISIN) if available or basic terms
		Number	Percentage2	Identity of issuer, subscription ratio, exercise price, exercise period, exercise type
CFD	1,193,998	1,193,998	2.155%	CH0038389992
		[4.1]	[4.2]
Total		1,193,998	2.155%

2 Calculated on the basis of the total number of voting rights pursuant to the entry in the commercial register (art. 14 para. 2 FMIO-FINMA)   Securities lending and comparable transactions in derivative holdings Of the derivative holdings mentioned in item 4 above, the following part is held due to securities lending and comparable transactions (art. 17 FMIO-FINMA):  

Nature of the legal transaction

Number of rights

Number of reported voting rights

Proportion of voting rights

Agreed date of return transfer or, if there is a right to choose, whether this applies to the contracting party subject to the obligation to notify or to the counterparty

PART 5: SALE POSITIONS PURSUANT TO ART. 14 PARA. 1 B FMIO-FINMA Total of all sale positions: 
Basis of calculation (art. 14 para. 2 FMIO-FINMA): total number of voting rights pursuant to the entry in the commercial register (see Central Business Names Index) or Publication according to art. 115 para. 3 FMIO:  55,400,000    Derivative holdings Share sale rights (such as put-options according to art. 15 para. 2 a FMIO-FINMA), granted (written) conversion and share purchase rights and other derivative holdings:  

Type of rights	Number of rights	Number of voting rights conferred		Security ID number (ISIN) if available or basic terms
		Number	Percentage2	Identity of issuer, subscription ratio, exercise price, exercise period, exercise type

Total 2 Calculated on the basis of the total number of voting rights pursuant to the entry in the commercial register (art. 14 para. 2 FMIO-FINMA)