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v3.24.0.1

Net Loss per Share - Narrative (Details) - $ / shares |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 05, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Feb. 29, 2024 | Dec. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Weighted-average number of shares, basic (in shares) |  | 49,122,534 | 29,361,353 |  |
Weighted-average number of shares, diluted (in shares) |  | 49,122,534 | 29,361,353 |  |
Net loss per share - basic (in USD per share) |  | $ 0.73 | $ 1.70 |  |
Net loss per share - diluted (in USD per share) |  | $ 0.73 | $ 1.70 |  |
Number of shares outstanding (in shares) | 52,701,111 |  |  |  |
Pro forma |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Weighted-average number of shares, basic (in shares) |  | 57,679,106 |  |  |
Weighted-average number of shares, diluted (in shares) |  | 57,679,106 |  |  |
Net loss per share - basic (in USD per share) |  | $ 0.76 |  |  |
Net loss per share - diluted (in USD per share) |  | $ 0.76 |  |  |
Common Stock |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Number of shares outstanding (in shares) |  |  |  |  | 12,161,331
ML parties other than BVF shareholders |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
MoonLake AG common shares (in shares) |  | 74,482 |  |  |
Common Class C |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Common shares, shares issued (in shares) |  | 2,505,476 | 13,723,511 |  |
Stock converted (in shares) | 15,775,472 |  |  |  |
Number of shares outstanding (in shares) |  | 2,505,476 | 13,723,511 |  |
Common Class C | Common Stock |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Common shares, shares issued (in shares) |  | 2,505,476 | 13,723,511 |  |
Number of shares outstanding (in shares) |  | 2,505,476 | 13,723,511 |  |
Common Class C | ML parties other than BVF shareholders | Pro forma |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Stock forfeited (in shares) |  | 2,505,476 |  |  |
Common Class A |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Common shares, shares issued (in shares) |  | 60,466,453 | 38,977,600 |  |
Weighted-average number of shares, basic (in shares) |  | 49,122,534 | 29,361,353 |  |
Weighted-average number of shares, diluted (in shares) |  | 49,122,534 | 29,361,353 |  |
Net loss per share - basic (in USD per share) |  | $ 0.73 | $ 1.70 |  |
Net loss per share - diluted (in USD per share) |  | $ 0.73 | $ 1.70 |  |
Number of shares outstanding (in shares) |  | 60,466,453 | 38,977,600 |  |
Common Class A | Pro forma | Subsequent Event |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Number of shares outstanding (in shares) |  |  |  | 63,886,757 |
Common Class A | Common Stock |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Common shares, shares issued (in shares) |  | 60,466,453 | 38,977,600 |  |
Number of shares outstanding (in shares) |  | 60,466,453 | 38,977,600 |  |
Common Class A | ML parties other than BVF shareholders | Pro forma |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Stock converted (in shares) |  | 2,505,476 |  |  |

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