ioneer Ltd (IONR) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

383,264Shares Outstanding

2,536Shares held by institutions

$10,474Value of institutional holdings

122.99%Institutional ownership %

330.58%Shares Changed QoQ

22No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

According to SEC filings for the period ending December 2025, ioneer Ltd (NASDAQ:IONR) is held by 22 institutional firms.

The percentage of Ioneer owned by institutions changed from 34.1% in September 2025 to 123.0% in December 2025, marking a slight up trend.
In percentage terms, this reflects as a holdings change of 330.58% quarter on quarter, and an unavailable change year over year.
Of these 22 institutional investors, 15 increased their holdings in Ioneer, while 4 of them reduced positions, and 3 investors maintained their exposure.
This class of investors increased its holdings in Ioneer to 471.39K shares for the 13F-cycle ending December 2025, up by 361.92K shares quarter on quarter, and up 406.44K shares year over year.
As of December 31, 2025, MARSHALL WACE, LLP held Ioneer's largest shareholding position with over 165.23K shares, representing 43.11% of total outstanding shares.
Among the most significant buyers of Ioneer during December 2025 were MARSHALL WACE, LLP (165.23K), CITADEL ADVISORS LLC (56.91K), MORGAN STANLEY (51.30K), MILLENNIUM MANAGEMENT LLC (19.93K), OLD MISSION CAPITAL LLC (18.27K).
Leading sellers of Ioneer stock in December 2025 included JANE STREET GROUP, LLC (13.54K), GK Wealth Management LLC (7.72K), EverSource Wealth Advisors, LLC (1.03K), OSAIC HOLDINGS, INC. (100).
The top 10 institutional holders of Ioneer for the quarter ending December 2025 included MARSHALL WACE, LLP (165.23K), MORGAN STANLEY (60.91K), CITADEL ADVISORS LLC (56.91K), JANE STREET GROUP, LLC (40.50K), GK Wealth Management LLC (33.77K), MILLENNIUM MANAGEMENT LLC (19.93K), OLD MISSION CAPITAL LLC (18.27K), HRT FINANCIAL LP (17.32K), Pekin Hardy Strauss, Inc. (16.00K), Brookwood Investment Group LLC (11.50K).

22 Institutional Holders

2,536 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
MARSHALL WACE, LLP	31 Dec, 2025	165,231	165,231	0.00%	$793,109.00
MORGAN STANLEY	31 Dec, 2025	60,905	51,305	534.43%	$292,344.00
CITADEL ADVISORS LLC	31 Dec, 2025	56,915	56,915	0.00%	$273,192.00
JANE STREET GROUP, LLC	31 Dec, 2025	40,497	-13,545	-25.06%	$194,385.00
GK Wealth Management LLC	31 Dec, 2025	33,775	-7,725	-18.61%	$162,120.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	19,934	19,934	0.00%	$95,683.00
OLD MISSION CAPITAL LLC	31 Dec, 2025	18,270	18,270	0.00%	$87,696.00
HRT FINANCIAL LP	31 Dec, 2025	17,322	17,322	0.00%	$83.00
Pekin Hardy Strauss, Inc.	31 Dec, 2025	16,000	16,000	0.00%	$76,800.00
Brookwood Investment Group LLC	31 Dec, 2025	11,500	11,500	0.00%	$55,200.00
SUSQUEHANNA INTERNATIONAL GROUP, LLP	31 Dec, 2025	11,309	11,309	0.00%	$54,283.00
XTX Topco Ltd	31 Dec, 2025	11,241	11,241	0.00%	$53,957.00
UBS Group AG	31 Dec, 2025	2,150	1,907	784.77%	$10,320.00
Marquette Asset Management, LLC	31 Dec, 2025	2,000	0	0.00%	$9,600.00
RHUMBLINE ADVISERS	31 Dec, 2025	1,808	1,808	0.00%	$8,677.00
GAMMA Investing LLC	31 Dec, 2025	1,191	1,191	0.00%	$5,717.00
WELLS FARGO & COMPANY/MN	31 Dec, 2025	500	0	0.00%	$2,400.00
JONES FINANCIAL COMPANIES LLLP	31 Dec, 2025	423	367	655.36%	$2,030.00
OSAIC HOLDINGS, INC.	31 Dec, 2025	300	-100	-25.00%	$1,440.00
Bogart Wealth, LLC	31 Dec, 2025	60	20	50.00%	$288.00

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