As of November 7, 2026, 3 holders' latest Schedule 13D or 13G filings report owning 5% or more of Ionetix Corp / DE /. The largest reported stake is Ospraie Real Assets Fund LP's, at 19.9%. 3 filings are on record since April 20, 2026 (Schedule 13G, April 20, 2026).
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Key facts
- · Reporting person: ELI LILLY & Co · Sole voting: 8,411,397 · Shared voting: 0 · Sole dispositive: 8,411,397 · Shared dispositive: 0 · SCHEDULE 13G, 2026-07-24
- · Holder: Shamrock Ionetix LLC · Percent: 7.2% · SCHEDULE 13D
- · Holder: Ospraie Real Assets Fund LP · Percent: 19.9% · SCHEDULE 13G
Ionetix Corp / DE / has 3 Schedule 13D or 13G filings on record since 2026-04-20. 3 holders' latest filing reports 5% or more of common stock, par value $0.0001 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Ospraie Real Assets Fund LP | 19.9% | 21,652,444 | SCHEDULE 13G, 2026-04-20 | 2026-04-09 |
| ELI LILLY & Co | 7.9% | 8,411,397 | SCHEDULE 13G, 2026-07-24 | 2026-04-09 |
| Shamrock Ionetix LLC | 7.2% | 7,211,396 | SCHEDULE 13D, 2026-04-20 | 2026-04-09 |
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More on Ionetix Corp / DE / and the records around it.
Ionetix Corp / DE / elsewhere on the record
- Leadership changes May 2026
- Form D filing Apr 2026
- Who owns it
Companies that share a holder
- Ospraie Real Assets Fund LP also filed stake reports on 2 other companies: Sinda Ltd. (Aug 2026), Sunshine Silver Mining & Refining Co (Aug 2026)
- ELI LILLY & Co also filed stake reports on 5 other companies: TRex Bio, Inc. (Oct 2026), Scribe Therapeutics, Inc. (Jul 2026), ProQR Therapeutics N.V. (Jul 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| ELI LILLY & Co | 8,411,397 | 0 | 8,411,397 | 0 | SCHEDULE 13G, 2026-07-24 |
The latest filing identifies Ionetix Corp / DE / by CUSIP 000000000 and gives its principal executive office as 3130 SOVEREIGN DRIVE, LANSING, MI 48911 (SCHEDULE 13G, 2026-07-24).
Purpose of Transaction (Item 4)
Shamrock Ionetix LLC
The information set forth in Item 6 hereof is hereby incorporated by reference into this Item 4. All of the securities that are held of record by SI, SEL and Mr. Gold, and that may be deemed to be beneficially owned by the Reporting Persons, as reported herein, were acquired for investment purposes. The Reporting Persons retain the right to change their investment intent, from time to time, to acquire additional ordinary shares or other securities of the Issuer, or to sell or otherwise dispose of all or part of the ordinary shares or other securities of the Issuer, if any, beneficially owned by them, in each case in any manner permitted by law. The Reporting Persons may engage from time to time in ordinary course transactions with financial institutions with respect to the securities described herein. Except as described above, none of the Reporting Persons currently has any other plans or proposals that would be related to or would result in any of the matters described in Items 4(a)-(j) of the Instructions to Schedule 13D. However, as part of the ongoing evaluation of investment and investment alternatives, the Reporting Persons may consider such matters and, subject to applicable law, may formulate a plan with respect to such matters, and, from time to time, may hold discussions with or make formal proposals to management or the Board of the Issuer or other third parties regarding such matters.Item 4 of the SCHEDULE 13D filed 2026-04-20
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2026-04-20 | Shamrock Ionetix LLC | 7.2% | SCHEDULE 13D |
| 2026-04-20 | Ospraie Real Assets Fund LP | 19.9% | SCHEDULE 13G |
| 2026-07-24 | ELI LILLY & Co | 7.9% | SCHEDULE 13G |
Questions about who owns Ionetix Corp / DE /
Who owns Ionetix Corp / DE /?
On this page, 3 holders' latest ownership filings report 5% or more of Ionetix Corp / DE /: Ospraie Real Assets Fund LP (19.9%, Schedule 13G, filed 2026-04-20), ELI LILLY & Co (7.9%, Schedule 13G, filed 2026-07-24) and Shamrock Ionetix LLC (7.2%, Schedule 13D, filed 2026-04-20).
Who are the largest shareholders of Ionetix Corp / DE /?
By the share each holder's latest filing reports, the largest holders of Ionetix Corp / DE / on this page are Ospraie Real Assets Fund LP (19.9%), ELI LILLY & Co (7.9%) and Shamrock Ionetix LLC (7.2%).
When did Ospraie Real Assets Fund LP buy into Ionetix Corp / DE /?
The filings give report dates, not purchase dates. The earliest filing from Ospraie Real Assets Fund LP on this page is the Schedule 13G, filed 2026-04-20, reporting 19.9%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 3 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for Ionetix Corp / DE /
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| October 29, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | Source |
| May 20, 2026 | Leadership change: Michael Tarnok appointed, Director, and 1 more | — | Leadership changes | Source |
| April 23, 2026 | Form D, private offering | $32.33M sold | Form D page | Source |
| April 16, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | Source |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.