BVF PARTNERS L P/IL - 17 Jun 2026 Form 4 Insider Report for MoonLake Immunotherapeutics (MLTX)

Reporting relationship
Director, 10%+ Owner
Issuer ticker
MLTX
Reported as of
17 Jun 2026
Net transaction value
$0
Source evidence Original filing metadata and source links for verification. 5 source fields
SEC form
4
Accepted by SEC
22 Jun 2026, 16:50:38 UTC
Prior SEC filing
18 May 2026
Next SEC filing
23 Jun 2026
Source filing
View source filing
Reporting owner 1 detail
Reporting owner signature
BVF Partners L.P., By: BVF Inc., its general partner, By: /s/ Mark N. Lampert, President

Key filing fact

BVF PARTNERS L P/IL filed Form 4 for MoonLake Immunotherapeutics (MLTX) on 22 Jun 2026.

Key facts

  • This page summarizes BVF PARTNERS L P/IL's Form 4 filing for MoonLake Immunotherapeutics (MLTX).
  • 1 reported transaction and 40 derivative rows are listed below.
  • Accepted by SEC: 22 Jun 2026, 16:50.

Change

  • Previous filing in this sequence was filed on 18 May 2026.
  • Current net transaction value: $0.

Research use

  • This tells you what this filing adds before you inspect full transaction and derivative tables.
  • You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (10)

CIK 0001055947 Primary reporting owner

BVF PARTNERS L P/IL

Relationship
Director, 10%+ Owner
Address
44 MONTGOMERY ST., 40TH FL, SAN FRANCISCO
Signature
BVF Partners L.P., By: BVF Inc., its general partner, By: /s/ Mark N. Lampert, President
Signature date
22 Jun 2026
CIK 0000918923

BIOTECHNOLOGY VALUE FUND L P

Relationship
Director, 10%+ Owner
Address
44 MONTGOMERY STREET, 40TH FL, SAN FRANCISCO
Signature
Biotechnology Value Fund, L.P., By: BVF I GP LLC, its general partner, By: /s/ Mark N. Lampert, Chief Executive Officer
Signature date
22 Jun 2026
CIK 0001803805

BVF I GP LLC

Relationship
Director, 10%+ Owner
Address
44 MONTGOMERY STREET, 40TH FL, SAN FRANCISCO
Signature
BVF I GP LLC, By: /s/ Mark N. Lampert, Chief Executive Officer
Signature date
22 Jun 2026
CIK 0001102444

BIOTECHNOLOGY VALUE FUND II LP

Relationship
Director, Other*
Address
44 MONTGOMERY STREET, 40TH FL, SAN FRANCISCO
Signature
Biotechnology Value Fund II, L.P., By: BVF II GP LLC, its general partner, By: /s/ Mark N. Lampert, Chief Executive Officer
Signature date
22 Jun 2026
CIK 0001803806

BVF II GP LLC

Relationship
Director, Other*
Address
44 MONTGOMERY STREET, 40TH FL, SAN FRANCISCO
Signature
BVF II GP LLC, By: /s/ Mark N. Lampert, Chief Executive Officer
Signature date
22 Jun 2026
CIK 0001660683

Biotechnology Value Trading Fund OS LP

Relationship
Director, Other*
Address
P.O. BOX 309 UGLAND HOUSE, GRAND CAYMAN, CAYMAN ISLANDS
Signature
BVF Partners OS Ltd., By: BVF Partners L.P., its sole member, By: BVF Inc., its general partner, By: /s/ Mark N. Lampert, President
Signature date
22 Jun 2026
CIK 0001660684

BVF Partners OS Ltd.

Relationship
Director, Other*
Address
P.O. BOX 309 UGLAND HOUSE, GRAND CAYMAN, CAYMAN ISLANDS
Signature
Biotechnology Value Trading Fund OS LP, By: BVF Partners L.P., its investment manager, BVF Inc., its general partner, By: /s/ Mark N. Lampert, President
Signature date
22 Jun 2026
CIK 0001803809

BVF GP HOLDINGS LLC

Relationship
Director, 10%+ Owner
Address
44 MONTGOMERY STREET, 40TH FL, SAN FRANCISCO
Signature
BVF GP Holdings LLC, By: /s/ Mark N. Lampert, Chief Executive Officer
Signature date
22 Jun 2026
CIK 0001056807

BVF INC/IL

Relationship
Director, 10%+ Owner
Address
44 MONTGOMERY STREET, 40TH FL, SAN FRANCISCO
Signature
BVF Inc., By: /s/ Mark N. Lampert, President
Signature date
22 Jun 2026
CIK 0001233840

LAMPERT MARK N

Relationship
Director, 10%+ Owner
Address
44 MONTGOMERY STREET, 40TH FL, SAN FRANCISCO
Signature
/s/ Mark N. Lampert
Signature date
22 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
8,302,735
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F2
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
8,302,735
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F2
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
8,302,735
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F2
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
8,302,735
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F2
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
8,302,735
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F2
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
8,302,735
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F2
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
8,302,735
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F2
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
8,302,735
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F2
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
8,302,735
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F2
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
8,302,735
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F2
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,599,722
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F3
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,599,722
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F3
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,599,722
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F3
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,599,722
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F3
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,599,722
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F3
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,599,722
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F3
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,599,722
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F3
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,599,722
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F3
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,599,722
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F3
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,599,722
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F3
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,039,238
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F4
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,039,238
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F4
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,039,238
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F4
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,039,238
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F4
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,039,238
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F4
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,039,238
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F4
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,039,238
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F4
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,039,238
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F4
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,039,238
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F4
MLTX holding

Class A Ordinary Shares, $0.0001 par value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,039,238
Date
17 Jun 2026
Ownership
Direct
Footnotes
F1, F4

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MLTX transaction Derivative

Option to Buy

Award

Transaction value
Shares
+22,195
Change %
Price
$0.000000*
Shares after
22,195
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
22,195
Exercise price
$19.19
Footnotes
F1, F5, F9
MLTX transaction Derivative

Option to Buy

Award

Transaction value
Shares
+22,195
Change %
Price
$0.000000*
Shares after
22,195
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
22,195
Exercise price
$19.19
Footnotes
F1, F5, F9
MLTX transaction Derivative

Option to Buy

Award

Transaction value
Shares
+22,195
Change %
Price
$0.000000*
Shares after
22,195
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
22,195
Exercise price
$19.19
Footnotes
F1, F5, F9
MLTX transaction Derivative

Option to Buy

Award

Transaction value
Shares
+22,195
Change %
Price
$0.000000*
Shares after
22,195
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
22,195
Exercise price
$19.19
Footnotes
F1, F5, F9
MLTX transaction Derivative

Option to Buy

Award

Transaction value
Shares
+22,195
Change %
Price
$0.000000*
Shares after
22,195
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
22,195
Exercise price
$19.19
Footnotes
F1, F5, F9
MLTX transaction Derivative

Option to Buy

Award

Transaction value
Shares
+22,195
Change %
Price
$0.000000*
Shares after
22,195
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
22,195
Exercise price
$19.19
Footnotes
F1, F5, F9
MLTX transaction Derivative

Option to Buy

Award

Transaction value
Shares
+22,195
Change %
Price
$0.000000*
Shares after
22,195
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
22,195
Exercise price
$19.19
Footnotes
F1, F5, F9
MLTX transaction Derivative

Option to Buy

Award

Transaction value
Shares
+22,195
Change %
Price
$0.000000*
Shares after
22,195
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
22,195
Exercise price
$19.19
Footnotes
F1, F5, F9
MLTX transaction Derivative

Option to Buy

Award

Transaction value
Shares
+22,195
Change %
Price
$0.000000*
Shares after
22,195
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
22,195
Exercise price
$19.19
Footnotes
F1, F5, F9
MLTX transaction Derivative

Option to Buy

Award

Transaction value
Shares
+22,195
Change %
Price
$0.000000*
Shares after
22,195
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
22,195
Exercise price
$19.19
Footnotes
F1, F5, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,682
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
6,682
Exercise price
$48.83
Footnotes
F1, F6, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,682
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
6,682
Exercise price
$48.83
Footnotes
F1, F6, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,682
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
6,682
Exercise price
$48.83
Footnotes
F1, F6, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,682
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
6,682
Exercise price
$48.83
Footnotes
F1, F6, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,682
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
6,682
Exercise price
$48.83
Footnotes
F1, F6, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,682
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
6,682
Exercise price
$48.83
Footnotes
F1, F6, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,682
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
6,682
Exercise price
$48.83
Footnotes
F1, F6, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,682
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
6,682
Exercise price
$48.83
Footnotes
F1, F6, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,682
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
6,682
Exercise price
$48.83
Footnotes
F1, F6, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
6,682
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
6,682
Exercise price
$48.83
Footnotes
F1, F6, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
7,688
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
7,688
Exercise price
$42.44
Footnotes
F1, F7, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
7,688
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
7,688
Exercise price
$42.44
Footnotes
F1, F7, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
7,688
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
7,688
Exercise price
$42.44
Footnotes
F1, F7, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
7,688
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
7,688
Exercise price
$42.44
Footnotes
F1, F7, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
7,688
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
7,688
Exercise price
$42.44
Footnotes
F1, F7, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
7,688
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
7,688
Exercise price
$42.44
Footnotes
F1, F7, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
7,688
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
7,688
Exercise price
$42.44
Footnotes
F1, F7, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
7,688
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
7,688
Exercise price
$42.44
Footnotes
F1, F7, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
7,688
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
7,688
Exercise price
$42.44
Footnotes
F1, F7, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
7,688
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
7,688
Exercise price
$42.44
Footnotes
F1, F7, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
11,297
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
11,297
Exercise price
$29.18
Footnotes
F1, F8, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
11,297
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
11,297
Exercise price
$29.18
Footnotes
F1, F8, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
11,297
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
11,297
Exercise price
$29.18
Footnotes
F1, F8, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
11,297
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
11,297
Exercise price
$29.18
Footnotes
F1, F8, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
11,297
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
11,297
Exercise price
$29.18
Footnotes
F1, F8, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
11,297
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
11,297
Exercise price
$29.18
Footnotes
F1, F8, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
11,297
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
11,297
Exercise price
$29.18
Footnotes
F1, F8, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
11,297
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
11,297
Exercise price
$29.18
Footnotes
F1, F8, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
11,297
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
11,297
Exercise price
$29.18
Footnotes
F1, F8, F9
MLTX holding Derivative

Option to Buy

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
11,297
Date
17 Jun 2026
Ownership
See footnote
Underlying class
Class A Ordinary Shares, $0.0001 par value
Underlying amount
11,297
Exercise price
$29.18
Footnotes
F1, F8, F9
* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 9 footnotes

Footnote F1

This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a Section 13(d) group that collectively owns more than 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.

Footnote F2

Securities owned directly by BVF. As the general partner of BVF, BVF GP may be deemed to beneficially own the securities owned directly by BVF. As the sole member of BVF GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF. As the investment manager of BVF, Partners may be deemed to beneficially own the securities owned directly by BVF. As the general parter of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF.

Footnote F3

Securities owned directly by BVF2. As the general partner of BVF2, BVF2 GP may be deemed to beneficially own the securities owned directly by BVF2. As the sole member of BVF2 GP, BVF GPH may be deemed to beneficially own the securities owned directly by BVF2. As the investment manager of BVF2, Partners may be deemed to beneficially own the securities owned directly by BVF2. As the general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by BVF2.

Footnote F4

Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.

Footnote F5

This option represents a right to purchase a total of 22,195 Class A Ordinary Shares of the Issuer, which will vest in full the earlier of (i) June 17, 2027 and (ii) the date of the Issuer's next annual general meeting of shareholders, subject to Spike Loy's continued service to the Issuer.

Footnote F6

This option represents a right to purchase a total of 6,682 Class A Ordinary Shares of the Issuer. This option has fully vested as of the date hereof.

Footnote F7

This option represents a right to purchase a total of 7,688 Class A Ordinary Shares of the Issuer. This option has fully vested as of the date hereof.

Footnote F8

This option represents a right to purchase a total of 11,297 Class A Ordinary Shares of the Issuer. This option has fully vested as of the date hereof.

Footnote F9

Partners, BVF Inc. and Mr. Lampert may be deemed to have a pecuniary interest in the securities reported owned herein due to a certain agreement between Partners and Spike Loy, who serves on the Issuer's board of directors and as a Managing Director of Partners, pursuant to which Mr. Loy is obligated to transfer the economic benefit, if any, received upon the sale of the shares issuable upon exercise of the securities reported owned herein to Partners. As such, Mr. Loy disclaims beneficial ownership of the securities reported herein except to the extent of his pecuniary interest therein.

SEC remarks

For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each of the Reporting Persons may be deemed to be a director by deputization of the Issuer due to a Managing Director of Partners, Spike Loy, serving on the Board of Directors of the Issuer, and his agreement to transfer to Partners the economic benefit, if any, received upon the sale of any securities of the Issuer he receives in his capacity as a director of the Issuer.

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