ioneer Ltd (IONR) SVP reports substantial initial share ownership

Rhea-AI Filing Summary

ioneer Ltd senior vice president of engineering operations Matthew Weaver filed an initial statement of ownership showing a significant equity position. He directly holds 11,159,727 Ordinary Shares, including 1,140,516 shares underlying time-based units vesting on January 7, 2027 and 2,078,361 shares underlying units vesting on January 1, 2029. He also has exposure through American Depositary Shares, represented by 48,594 ADSs, each convertible into 40 Ordinary Shares, with no expiration date. The filing records ownership rather than any new share purchases or sales.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Weaver Matthew

Role SVP of Engineering Operations

Type	Security	Shares	Price	Value
holding	American Depositary Shares	--	--	--
holding	Ordinary Shares	--	--	--

Holdings After Transaction: American Depositary Shares — 1,943,760 shares (Direct); Ordinary Shares — 11,159,727 shares (Direct)

Footnotes (1)

1. Includes 1,140,516 Ordinary Shares underlying time-based performance units ("Units") that vest on January 7, 2027 and 2,078,361 Ordinary Shares underlying Units that vest on January 1, 2029. Each American Depositary Share is convertible at any time, at the holder's election, into 40 ordinary shares of the issuer. The American Depositary Shares have no expiration date. Represented by 48,594 American Depositary Shares.

Understanding Insider Trading Forms →

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Weaver Matthew

(Last) (First) (Middle)

C/O IONEER LTD

9460 DOUBLE R. BLVD, SUITE 200

(Street)

RENO 85921

(City) (State) (Zip)

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
ioneer Ltd [ IONR ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP of Engineering Operations

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Ordinary Shares	11,159,727(1)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
American Depositary Shares	(2)	(2)	Ordinary Shares	1,943,760(3)	(2)	D

Explanation of Responses:

1. Includes 1,140,516 Ordinary Shares underlying time-based performance units ("Units") that vest on January 7, 2027 and 2,078,361 Ordinary Shares underlying Units that vest on January 1, 2029.

2. Each American Depositary Share is convertible at any time, at the holder's election, into 40 ordinary shares of the issuer. The American Depositary Shares have no expiration date.

3. Represented by 48,594 American Depositary Shares.

	/s/ Matthew M. Weaver	03/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

FAQ

What does Matthew Weaver’s Form 3 filing show for ioneer Ltd (IONR)?

The Form 3 shows Matthew Weaver’s initial ownership in ioneer Ltd, including 11,159,727 Ordinary Shares and additional exposure via American Depositary Shares. It records his existing beneficial holdings as an officer, rather than reporting any new share purchases or sales.

How many Ordinary Shares of ioneer Ltd (IONR) does Matthew Weaver report?

Matthew Weaver reports beneficial ownership of 11,159,727 Ordinary Shares. This total includes shares underlying time-based performance units scheduled to vest in 2027 and 2029, reflecting both currently held stock and future equity that may vest if conditions are met.

What future-vesting equity units are disclosed for ioneer Ltd (IONR)?

The filing discloses 1,140,516 Ordinary Shares underlying units vesting on January 7, 2027 and 2,078,361 Ordinary Shares underlying units vesting on January 1, 2029. These time-based performance units represent additional potential equity if vesting requirements are satisfied.

How are ioneer Ltd (IONR) American Depositary Shares described in the filing?

Each American Depositary Share is convertible into 40 Ordinary Shares of ioneer Ltd at the holder’s election, with no expiration date. The reported position is represented by 48,594 ADSs, providing indirect exposure to 1,943,760 underlying Ordinary Shares of the company.

Does this ioneer Ltd (IONR) Form 3 indicate any insider buying or selling?

No. The Form 3 is an initial statement of beneficial ownership, so it primarily lists Matthew Weaver’s existing holdings. Transaction summaries show holding entries only, with no reported buys, sells, exercises, gifts, or other disposition events in this specific disclosure.