BlackRock reports 2,295,825 JADE shares (4.7%)

BlackRock, Inc. amended a Schedule 13G to report beneficial ownership of 2,295,825 shares of JADE BIOSCIENCES INC common stock, representing 4.7%.

Rhea-AI Filing Summary

BlackRock, Inc. amended a Schedule 13G to report beneficial ownership of 2,295,825 shares of JADE BIOSCIENCES INC common stock, representing 4.7%.

The filing states sole voting power of 2,257,003 shares and sole dispositive power of 2,295,825 shares. The amendment is signed by Spencer Fleming on 04/27/2026.

Insights

Institutional Ownership Analyst

BlackRock discloses a sub-5% passive stake in JADE BIOSCIENCES.

The amendment to the Schedule 13G/A lists 2,295,825 shares beneficially owned, equal to 4.7% of the class. The filing attributes voting and dispositive power to BlackRock's reporting business units, consistent with passive investment reporting.

Ownership is below the 5% threshold; changes in filings or position size in later amendments would be the primary items to watch in future regulatory disclosures.

Key Figures

Beneficially owned shares: 2,295,825 shares Percent of class: 4.7% Sole voting power: 2,257,003 shares +1 more

4 metrics

Beneficially owned shares 2,295,825 shares Amount beneficially owned reported on Schedule 13G/A

Percent of class 4.7% Percent of common stock beneficially owned

Sole voting power 2,257,003 shares Sole power to vote or direct the vote

Sole dispositive power 2,295,825 shares Sole power to dispose or direct disposition

Key Terms

Schedule 13G/A, beneficially owned, sole dispositive power

3 terms

Schedule 13G/A regulatory

"Amendment No. 2 to Schedule 13G/A reflecting 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.

beneficially owned regulatory

"Amount beneficially owned: 2295825"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole dispositive power regulatory

"Sole power to dispose or to direct the disposition of: 2295825"

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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake does BlackRock hold in JADE BIOSCIENCES (JBIO)?

BlackRock reports beneficial ownership of 2,295,825 shares, equal to 4.7% of JADE BIOSCIENCES common stock. This figure appears in Amendment No. 2 to the Schedule 13G/A signed on 04/27/2026.

Does BlackRock have voting control over its JADE shares?

The filing shows sole voting power of 2,257,003 shares and sole dispositive power of 2,295,825 shares. Shared voting or dispositive power is reported as 0 in the cover data.

Is BlackRock reporting this stake as passive or active ownership?

The filing is a Schedule 13G/A amendment, which is typically used for passive investors. The cover language attributes holdings to 'Reporting Business Units' of BlackRock, indicating aggregated passive reporting.

Will this filing require any immediate regulatory actions for JADE (JBIO)?

No immediate regulatory action is indicated. The filing states ownership is 5 percent or less of the class, and the Schedule 13G/A amendment documents beneficial ownership and authority details without listing any further regulatory steps.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 04/27/2026 - 04:12 PM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

JADE BIOSCIENCES INC

(Name of Issuer)

Common Stock

(Title of Class of Securities)

008064206

(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): 008064206

1

Names of Reporting Persons

BlackRock, Inc.

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 2,257,003.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 2,295,825.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,295,825.00

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)

4.7 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: JADE BIOSCIENCES INC
(b)	Address of issuer's principal executive offices: 221 CRESCENT ST., BUILDING 23, SUITE 105 WALTHAM MA 02453
Item 2.
(a)	Name of person filing: BlackRock, Inc. In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock, Inc., 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 008064206
Item 4.	Ownership
(a)	Amount beneficially owned: 2295825
(b)	Percent of class: 4.7 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 2257003
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 2295825
	(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.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Various persons have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the common stock of JADE BIOSCIENCES INC. No one person's interest in the common stock of JADE BIOSCIENCES INC is more than five percent of the total outstanding common shares.
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. See Exhibit 99
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.

BlackRock, Inc.

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	04/27/2026

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7