Company: LBRX
Filing Date: 2025-07-23
Form Type: DRS/A
Source: 0000950123-25-006557
Chunk: 340

Company: LB PHARMACEUTICALS INC
Filing Date: 2025-07-23
Form: DRS/A
Chunk 340
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 per share, basic and 
 diluted                                                                               |     |                         | 10,175,580 |   |     |   | 8,011,802 |   |

See accompanying notes to financial statements. F-4

LB Pharmaceuticals Inc Statements of Comprehensive Loss (in thousands)

|                                                      |     | Year Ended December 31, 
 2024                    |         |   |     | 2023 |        |   |
|:-----------------------------------------------------|:----|:------------------------|:--------|:--|:----|:-----|-------:|:--|
| Net loss                                             |     | $                       | (63,102 | ) |     | $    | (6,275 | ) |
| Unrealized (loss) gain on marketable securities, net |     |                         | (163    | ) |     |      |    274 |   |
| Comprehensive loss                                   |     | $                       | (63,265 | ) |     | $    | (6,001 | ) |

See accompanying notes to financial statements. F-5

LB Pharmaceuticals Inc Statements of Redeemable Convertible Preferred Stock and Stockholders’ Deficit (in thousands, except share data)

|                                                                                      |     | Redeemable Convertible Preferred Stock 
 Series Seed                            
 Shares                                 |         |     | Amount |     |     | Series A 
 Shares   |           |     | Amount |       |     | Series B 
 Shares   |         |     | Amount |     |     | Series C 
 Shares   |            |     | Amount |         |     | Common Stock 
 Shares       |           |     | Amount |   |     | Additional 
 Paid-in    
 Capital    |       |     | Accumulated 
 Deficit     |          |   |     | Accumulated   
 Other         
 Comprehensive 
 Income        |      |   |     | Total         
 Stockholders’ 
 Deficit       |         |   |
|:-------------------------------------------------------------------------------------|:----|:---------------------------------------|--------:|:----|:-------|----:|:----|:---------|----------:|:----|:-------|------:|:----|:---------|--------:|:----|:-------|----:|:----|:---------|-----------:|:----|:-------|--------:|:----|:-------------|----------:|:----|:-------|--:|:----|:-----------|------:|:----|:------------|:---------|:--|