As of November 6, 2026, 5 holders' latest Schedule 13D or 13G filings report owning 5% or more of Lattice Semiconductor Corp. The largest reported stake is T. Rowe Price Associates, Inc.'s, at 11.8%. 15 filings are on record since August 12, 2025 (Schedule 13G/A, May 15, 2026).
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Key facts
- · Reporting person: T. Rowe Price Investment Management, Inc. · Sole voting: 7,769,263 · Shared voting: 0 · Sole dispositive: 7,790,567 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-07-08
- · Reporting person: T. Rowe Price Associates, Inc. · Sole voting: 15,860,828 · Shared voting: 0 · Sole dispositive: 16,083,095 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-05-15
- · Holder: T. Rowe Price Investment Management, Inc. · Percent: 11.9% · SCHEDULE 13G/A
- · Reporting person: Vanguard Capital Management · Sole voting: 1,046,726 · Shared voting: 0 · Sole dispositive: 7,192,236 · Shared dispositive: 0 · SCHEDULE 13G, 2026-04-30
- · Holder: Vanguard Portfolio Management · Percent: 5.43% · SCHEDULE 13G
Lattice Semiconductor Corp has 15 Schedule 13D or 13G filings on record since 2025-08-12. 5 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| T. Rowe Price Associates, Inc. | 11.8% | 16,083,095 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| BlackRock, Inc. | 10% | 13,732,335 | SCHEDULE 13G/A, 2025-11-06 | 2025-10-31 |
| T. Rowe Price Investment Management, Inc. | 5.7% | 7,790,567 | SCHEDULE 13G/A, 2026-07-08 | 2026-06-30 |
| Vanguard Portfolio Management | 5.43% | 7,435,097 | SCHEDULE 13G, 2026-04-29 | 2026-03-31 |
| Vanguard Capital Management | 5.25% | 7,192,236 | SCHEDULE 13G, 2026-04-30 | 2026-03-31 |
| Artisan Partners Asset Management Inc. | 3.4% | 4,702,294 | SCHEDULE 13G/A, 2025-08-12 | 2025-06-30 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-27 | 2026-03-13 |
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More on Lattice Semiconductor Corp and the records around it.
Lattice Semiconductor Corp elsewhere on the record
- Acquisition Jul 2026
- Leadership changes Jul 2026
- Who owns it
Companies that share a holder
- Artisan Partners Asset Management Inc. also filed stake reports on 16 other companies: Ascendis Pharma A/S (Aug 2026), AXALTA COATING SYSTEMS LTD. (Aug 2026), iRhythm Holdings, Inc. (Aug 2026)
- T. Rowe Price Investment Management, Inc. also filed stake reports on 167 other companies: CABALETTA BIO INC (Nov 2026), MADISON SQUARE GARDEN SPORTS CORP (Nov 2026), MSG RANGERS CORP (Nov 2026)
- T. Rowe Price Associates, Inc. also filed stake reports on 191 other companies: PACIFIC BIOSCIENCES OF CALIF (Nov 2026), APARTMENT INVT & MGMT CO -A (Oct 2026), BETA BIONICS INC (Oct 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| T. Rowe Price Associates, Inc. | 15,860,828 | 0 | 16,083,095 | 0 | SCHEDULE 13G/A, 2026-05-15 |
| T. Rowe Price Investment Management, Inc. | 7,769,263 | 0 | 7,790,567 | 0 | SCHEDULE 13G/A, 2026-07-08 |
| Vanguard Capital Management | 1,046,726 | 0 | 7,192,236 | 0 | SCHEDULE 13G, 2026-04-30 |
The latest filing identifies Lattice Semiconductor Corp by CUSIP 518415104 and gives its principal executive office as 5555 NE MOORE CT, HILLSBORO, OR 97124 (SCHEDULE 13G/A, 2026-07-08).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-12 | Artisan Partners Asset Management Inc. | 3.4% | SCHEDULE 13G/A |
| 2025-08-14 | T. Rowe Price Investment Management, Inc. | 16.5% | SCHEDULE 13G/A |
| 2025-08-14 | T. Rowe Price Investment Management, Inc. | 16.5% | SCHEDULE 13G/A |
| 2025-08-14 | T. Rowe Price Investment Management, Inc. | 16.5% | SCHEDULE 13G/A |
| 2025-10-17 | BlackRock, Inc. | 10% | SCHEDULE 13G/A |
| 2025-11-06 | BlackRock, Inc. | 10% | SCHEDULE 13G/A |
| 2025-11-14 | T. Rowe Price Associates, Inc. | 13.2% | SCHEDULE 13G/A |
| 2025-11-14 | T. Rowe Price Investment Management, Inc. | 15.2% | SCHEDULE 13G/A |
| 2026-02-17 | T. Rowe Price Associates, Inc. | 13.2% | SCHEDULE 13G/A |
| 2026-03-27 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-04-29 | Vanguard Portfolio Management | 5.43% | SCHEDULE 13G |
| 2026-04-30 | Vanguard Capital Management | 5.25% | SCHEDULE 13G |
| 2026-05-15 | T. Rowe Price Associates, Inc. | 11.8% | SCHEDULE 13G/A |
| 2026-05-15 | T. Rowe Price Investment Management, Inc. | 11.9% | SCHEDULE 13G/A |
| 2026-07-08 | T. Rowe Price Investment Management, Inc. | 5.7% | SCHEDULE 13G/A |
Questions about who owns Lattice Semiconductor Corp
Who owns Lattice Semiconductor Corp?
On this page, 5 holders' latest ownership filings report 5% or more of Lattice Semiconductor Corp: T. Rowe Price Associates, Inc. (11.8%, Schedule 13G/A, filed 2026-05-15), BlackRock, Inc. (10%, Schedule 13G/A, filed 2025-11-06), T. Rowe Price Investment Management, Inc. (5.7%, Schedule 13G/A, filed 2026-07-08), Vanguard Portfolio Management (5.43%, Schedule 13G, filed 2026-04-29) and Vanguard Capital Management (5.25%, Schedule 13G, filed 2026-04-30).
Who are the largest shareholders of Lattice Semiconductor Corp?
By the share each holder's latest filing reports, the largest holders of Lattice Semiconductor Corp on this page are T. Rowe Price Associates, Inc. (11.8%), BlackRock, Inc. (10%) and T. Rowe Price Investment Management, Inc. (5.7%).
When did T. Rowe Price Associates, Inc. buy into Lattice Semiconductor Corp?
The filings give report dates, not purchase dates. The earliest filing from T. Rowe Price Associates, Inc. on this page is the Schedule 13G/A, filed 2025-11-14, reporting 13.2%; its latest, Schedule 13G/A filed 2026-05-15, reports 11.8%. That earliest filing is itself an amendment, which updates an earlier report.
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%); 15 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 Lattice Semiconductor Corp
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| October 30, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | Source |
| October 22, 2026 | Leadership change: John McCool appointed, Director | — | Leadership changes | Source |
| July 27, 2026 | Acquired AMI TopCo, Inc. | $1B | Acquisition | Source |
| July 27, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | Source |
| May 4, 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.