Deep Track Biotechnology Master Fund, Ltd. - 30 Jul 2026 Form 4 Insider Report for LB PHARMACEUTICALS INC (LBRX)

Reporting relationship: 10%+ Owner
Issuer ticker: LBRX
Reported as of: 30 Jul 2026
Net transaction value: +$9,999,974
SEC form: 4
Accepted by SEC: 03 Aug 2026, 19:28:30 UTC
Prior SEC filing: 11 Feb 2026
Next SEC filing: 04 Aug 2026
Source filing: View source filing
Reporting owner signature: Deep Track Biotechology Master Fund, Ltd. /s/ David Kroin, Director

Key filing fact

Deep Track Biotechnology Master Fund, Ltd. filed Form 4 for LB PHARMACEUTICALS INC (LBRX) on 03 Aug 2026.

Key facts

This page summarizes Deep Track Biotechnology Master Fund, Ltd.'s Form 4 filing for LB PHARMACEUTICALS INC (LBRX).
1 reported transaction and 6 derivative rows are listed below.
Accepted by SEC: 03 Aug 2026, 19:28.

Change

Previous filing in this sequence was filed on 11 Feb 2026.
Current net transaction value: +$9,999,974.

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 (3)

CIK 0002015536 Primary reporting owner

Deep Track Biotechnology Master Fund, Ltd.

Relationship: 10%+ Owner
Address: C/O WALKERS CORPORATE LIMITED, 190 ELGIN AVE, GEORGE TOWN, CAYMAN ISLANDS
Signature: Deep Track Biotechology Master Fund, Ltd. /s/ David Kroin, Director
Signature date: 03 Aug 2026

CIK 0001856083

Deep Track Capital, LP

Relationship: 10%+ Owner
Address: 200 GREENWICH AVENUE, 3RD FLOOR, GREENWICH
Signature: Deep Track Capital, LP /s/ David Kroin, Managing Member of the General Partner of the Investment Adviser
Signature date: 03 Aug 2026

CIK 0001397513

KROIN DAVID

Relationship: 10%+ Owner
Address: C/O DEEP TRACK CAPITAL, LP,, 200 GREENWICH AVENUE, 3RD FLOOR, GREENWICH
Signature: /s/ David Kroin
Signature date: 03 Aug 2026

Reported derivative securities

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

LBRX transaction Derivative

Pre-Funded Warrants (Right to Buy)

Purchase

Transaction value: $9,999,974
Shares: +286,205
Change %: +76%
Price: $34.94
Shares after: 664,649
Date: 30 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 286,205
Exercise price: $0.000100
Footnotes: F1, F2, F3

LBRX transaction Derivative

Pre-Funded Warrants (Right to Buy)

Purchase

Transaction value: $9,999,974
Shares: +286,205
Change %: +76%
Price: $34.94
Shares after: 664,649
Date: 30 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 286,205
Exercise price: $0.000100
Footnotes: F1, F2, F3

LBRX transaction Derivative

Pre-Funded Warrants (Right to Buy)

Purchase

Transaction value: $9,999,974
Shares: +286,205
Change %: +76%
Price: $34.94
Shares after: 664,649
Date: 30 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 286,205
Exercise price: $0.000100
Footnotes: F1, F2, F3

LBRX holding Derivative

Pre-Funded Warrants (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 93,925
Date: 30 Jul 2026
Ownership: By Deep Track Special Opportunities Fund, LP
Underlying class: Common Stock
Underlying amount: 93,925
Exercise price: $0.000100
Footnotes: F1, F2, F4

LBRX holding Derivative

Pre-Funded Warrants (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 93,925
Date: 30 Jul 2026
Ownership: By Deep Track Special Opportunities Fund, LP
Underlying class: Common Stock
Underlying amount: 93,925
Exercise price: $0.000100
Footnotes: F1, F2, F4

LBRX holding Derivative

Pre-Funded Warrants (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 93,925
Date: 30 Jul 2026
Ownership: By Deep Track Special Opportunities Fund, LP
Underlying class: Common Stock
Underlying amount: 93,925
Exercise price: $0.000100
Footnotes: F1, F2, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

The Pre-Funded Warrants are exercisable immediately and may be exercised at any time until all of the Pre-Funded Warrants are exercised in full. The Pre-Funded Warrants do not expire.

Footnote F2

Under the terms of the Pre-Funded Warrants held by the Reporting Persons, the Issuer may not effect the exercise of any such Pre-Funded Warrant, and a holder will not be entitled to exercise any portion of any such Pre-Funded Warrant (i) if immediately prior to the exercise, the Reporting Persons (together with its affiliates), beneficially owns an aggregate number of shares of Issuer Common Stock greater than 9.99%, as applicable (the "Maximum Percentage"), of the total number of issued and outstanding shares of Common Stock of the Issuer without taking into account any shares underlying such Pre-Funded Warrants, or (ii) to the extent that immediately following the exercise, the holder (together with its affiliates) would beneficially own in excess of the Maximum Percentage of the number of shares of Common Stock outstanding immediately after giving effect to the issuance of such shares of Common Stock.

Footnote F3

Represents securities held by Deep Track Biotechnology Master Fund, Ltd. Deep Track Capital, LP is the investment manager of Deep Track Biotechnology Master Fund, Ltd. Mr. David Kroin is the managing member of Deep Track Capital GP, LLC, the general partner of Deep Track Capital, LP, and by virtue of such status may be deemed to be the beneficial owner of the shares owned by Deep Track Biotechnology Master Fund, Ltd. Deep Track Capital, LP and Mr. Kroin disclaim beneficial ownership of such shares except to the extent of their respective pecuniary interests.

Footnote F4

Represents securities held by Deep Track Special Opportunities Fund, LP. Deep Track Capital, LP is the investment manager of Deep Track Special Opportunities Fund LP. Mr. David Kroin is the managing member of Deep Track Capital GP, LLC, the general partner of Deep Track Capital, LP, and by virtue of such status may be deemed to be the beneficial owner of the shares owned by Deep Track Special Opportunities Fund, LP. Deep Track Capital, LP and Mr. Kroin disclaim beneficial ownership of such shares except to the extent of their respective pecuniary interests.