JPMorgan (NYSE: JPM) files amendment showing 1.43M LBRX shares (4.9%)

Rhea-AI Filing Summary

JPMorgan Chase & Co. filed an amendment to a Schedule 13G/A reporting beneficial ownership of 1,427,568 shares of LB Pharmaceuticals Inc. Common Stock, representing 4.9% of the class as reported.

The filing shows sole voting power over 1,311,423 shares and sole dispositive power over 1,427,568 shares. The reported filing cites affiliated entities including JPMorgan Chase Bank, N.A. and J.P. Morgan Investment Management Inc. The amendment is signed by a Vice President on 05/13/2026.

Insights

Institutional Ownership Analyst

Large custody/management holder reports a sub-5% position in LBRX.

The filing discloses beneficial ownership of 1,427,568 shares representing 4.9% as of the amendment. The position is reported with sole dispositive power held by the filer and material voting power noted.

Affiliated entities are identified, which is typical for asset managers and custodians; subsequent filings would show whether this is an aggregated client or proprietary position.

Corporate Governance Specialist

Disclosure clarifies voting and disposition authorities across JPMorgan entities.

The schedule lists sole voting power of 1,311,423 shares and sole dispositive power of 1,427,568 shares. The filing also identifies two affiliated entities by name.

This is an ownership disclosure for regulatory transparency; any changes crossing the 5% threshold would trigger different reporting obligations.

Key Figures

Beneficial ownership: 1,427,568 shares Percent of class: 4.9% Sole voting power: 1,311,423 shares +2 more

5 metrics

Beneficial ownership 1,427,568 shares Reported on Schedule 13G/A amendment

Percent of class 4.9% Percent of class reported in Item 4(b)

Sole voting power 1,311,423 shares Item 4(c)(i) — sole power to vote

Sole dispositive power 1,427,568 shares Item 4(c)(iii) — sole power to dispose

Signature date 05/13/2026 Filing signed by Vice President

Key Terms

Schedule 13G/A, Beneficial ownership, Sole dispositive power

3 terms

Schedule 13G/A regulatory

"Amendment to Schedule 13G/A reporting beneficial ownership"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Beneficial ownership financial

"Amount beneficially owned: 1,427,568 (b) Percent of class: 4.9 %"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Sole dispositive power regulatory

"Sole power to dispose or to direct the disposition of: 1,427,568"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

LB PHARMACEUTICALS INC

(Name of Issuer)

Common Stock, $0.0001 par value

(Title of Class of Securities)

50180M108

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 50180M108

1

Names of Reporting Persons

JPMORGAN CHASE & CO

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,311,423.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,427,568.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,427,568.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.9 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: LB PHARMACEUTICALS INC
(b)	Address of issuer's principal executive offices: One Pennsylvania Plaza, Suite 1025, NEW YORK, NEW YORK, 10119.
Item 2.
(a)	Name of person filing: JPMORGAN CHASE & CO
(b)	Address or principal business office or, if none, residence: 270 Park Avenue, New York, NY 10017
(c)	Citizenship: DE
(d)	Title of class of securities: Common Stock, $0.0001 par value
(e)	CUSIP No.: 50180M108
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 1,427,568
(b)	Percent of class: 4.9 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1,311,423
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 1,427,568
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. JPMorgan Chase Bank, National Association; J.P. Morgan Investment Management Inc.
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

JPMORGAN CHASE & CO

Signature:	Rachel Tsvaygoft
Name/Title:	Vice President
Date:	05/13/2026

FAQ

What percentage of LBRX does JPMorgan report owning?

Direct answer: JPMorgan reports beneficial ownership equal to 1,427,568 shares, representing 4.9%. Context: The filing is an amendment dated 05/13/2026 and lists voting and dispositive powers held by JPMorgan-related entities.

How many shares does JPMorgan have sole voting power over in LBRX?

Direct answer: The filing reports sole voting power for 1,311,423 shares. Context: That figure appears alongside a reported beneficial ownership total of 1,427,568 shares on the amended Schedule 13G/A.

Which JPMorgan entities are identified in the Schedule 13G/A for LBRX?

Direct answer: The filing names JPMorgan Chase Bank, National Association and J.P. Morgan Investment Management Inc.. Context: These affiliates are listed in Item 7 as related subsidiaries or entities tied to the reported position.

When was the Schedule 13G/A amendment for LBRX signed?

Direct answer: The amendment was signed on 05/13/2026 by a Vice President. Context: The cover references an internal date 03/31/2026 and the signature provides the filing execution date shown on the excerpt.

Does the filing indicate JPMorgan exceeds 5% ownership of LBRX?

Direct answer: No; the filing reports ownership of 4.9%, which is under the 5% threshold. Context: Item 5 expressly notes "Ownership of 5 percent or less of a class," consistent with the reported percentage.