ioneer Ltd (IONR) Ownership
IONR ownership summary
as of October 17, 2026- Institutions
- 3.3% of shares outstanding
- Insiders
- 0.52% of shares outstanding
- Shares outstanding
- 76.9M
- Float
- 61.6M shares available to trade
- Short interest
- 0.20% 121K shares short
- Days to cover
- 1.18 short interest down 21.0% vs prior month
- Institutions 3.34%
- Insiders 0.52%
- Other investors 96.14%
IONR top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Amvescap Plc. | 2.44% | 1.9M | $5.2M | −363,385 (−16.2%) | June 30, 2026 |
| 2 | CAMBRIDGE Invest RESEARCH ADVISORS, INC. | 0.30% | 231K | $636,423 | +134,041 (+138.8%) | June 30, 2026 |
| 3 | The Goldman Sachs Group Inc | 0.22% | 166K | $459,250 | +128,167 (+335.3%) | June 30, 2026 |
| 4 | Integrated Wealth Concepts LLC | 0.19% | 143K | $393,347 | −46,043 (−24.4%) | June 30, 2026 |
| 5 | GK Wealth Management LLC | 0.04% | 32K | $88,414 | +32,034 (0.0%) | June 30, 2026 |
| 6 | Susquehanna International Group, LLP | 0.04% | 29K | $79,546 | +4,353 (+17.8%) | June 30, 2026 |
| 7 | JustInvest LLC | 0.03% | 25K | $70,043 | +25,378 (0.0%) | June 30, 2026 |
| 8 | King Luther Capital Management Corp | 0.03% | 25K | $69,000 | — | June 30, 2026 |
| 9 | HRT FINANCIAL LLC | 0.03% | 23K | $63,927 | +23,162 (0.0%) | June 30, 2026 |
| 10 | XTX Topco Ltd | 0.03% | 21K | $57,234 | +20,737 (0.0%) | June 30, 2026 |
| 11 | Ingalls & Snyder LLC | 0.03% | 20K | $55,200 | +20,000 (0.0%) | June 30, 2026 |
| 12 | UBS Group AG | 0.02% | 19K | $51,353 | −91,002 (−83.0%) | June 30, 2026 |
| 13 | Bank of Oklahoma National Association | 0.02% | 18K | $48,300 | +17,500 (0.0%) | June 30, 2026 |
| 14 | Tower Research Capital LLC | 0.02% | 15K | $40,172 | +14,555 (0.0%) | June 30, 2026 |
| 15 | Citigroup Inc | 0.02% | 13K | $35,996 | −86,958 (−87.0%) | June 30, 2026 |
| 16 | Morgan Stanley - Brokerage Accounts | 0.01% | 11K | $29,974 | +6,755 (+164.6%) | June 30, 2026 |
| 17 | Millennium Management LLC | 0.01% | 11K | $29,568 | −22,089 (−67.3%) | June 30, 2026 |
| 18 | BNP Paribas Arbitrage, SA | 0.01% | 9,445 | $26,068 | +9,445 (0.0%) | June 30, 2026 |
| 19 | GAMMA Investing LLC | 0.01% | 4,531 | $12,506 | +2,476 (+120.5%) | June 30, 2026 |
| 20 | Rhumbline Advisers | 0.01% | 3,950 | $10,902 | +230 (+6.2%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 14 holders added 439K shares and 5 cut 609K.
IONR top mutual fund and ETF holders
5 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Invesco WilderHill Clean Energy ETF | 2.00% | 1.5M | $4.2M | −233,321 (−13.2%) | September 30, 2026 |
| 2 | Fidelity Nasdaq Composite Index | 0.01% | 5,790 | $15,980 | — | August 31, 2026 |
| 3 | Carbon Collective Climate Sol US Eq ETF | 0.01% | 5,168 | $14,264 | — | September 30, 2026 |
| 4 | Dimensional Glbl ex US CorEqMktETFUSDAcc | 0.00% | 14 | $39 | — | September 30, 2026 |
| 5 | Global Core Equity UCITS ETF USD Acc | 0.00% | 12 | $33 | — | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
IONR shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns IONR
Institutional investors own 3.3% of ioneer's shares and insiders 0.52%. The largest holder is Amvescap Plc. with 2.44% of the shares (1.9M), as of June 30, 2026. Among the top 20 institutions, 14 added shares and 5 reduced their stake in the latest filings. Short interest is 0.20% of the float, or 1.18 days of average trading volume. The share count rose 449.0% since 2014.
Related: IONR analyst forecast, IONR key metrics. See the IONR stock overview for the latest quote and news.
IONR ownership FAQ
Who owns the most ioneer stock?
The largest shareholders of ioneer are Amvescap Plc. (2.44%), CAMBRIDGE Invest RESEARCH ADVISORS, INC. (0.30%), The Goldman Sachs Group Inc (0.22%), Integrated Wealth Concepts LLC (0.19%), GK Wealth Management LLC (0.04%).
What percentage of ioneer is owned by institutions?
Institutions hold 3.3% of ioneer's shares outstanding; insiders hold 0.52%.
Which funds own ioneer?
The largest fund holders of ioneer are Invesco WilderHill Clean Energy ETF (2.00%), Fidelity Nasdaq Composite Index (0.01%), Carbon Collective Climate Sol US Eq ETF (0.01%), Dimensional Glbl ex US CorEqMktETFUSDAcc (0.00%), Global Core Equity UCITS ETF USD Acc (0.00%).
What is ioneer's short interest?
121K shares of ioneer were sold short, 0.20% of the float; at the average daily volume it would take 1.18 days to cover.
How many shares of ioneer are outstanding?
ioneer has 76.9M shares outstanding, of which 61.6M are in the public float.