CORNING INC · CUSIP 219350105 · CIK 2043084
As of 2026-06-30, Mainstream Capital Management LLC reported 14.29K GLW (shares), valued at $3.65M, or 2.20% of its reported non-derivative portfolio. Filed 2026-07-15.
Verify history & sources →Shares increased 0.76%; reported value increased 89.29%, and weight changed +0.91 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.
Left: % · Right: Shares · Independently scaled axes
Exact data and methodology
Axes scale independently; a crossing does not mean equal values. Weight uses each quarter's total reported non-derivative value. Same CUSIP; missing quarters are gaps, not zero. Revised history may include later disclosures.
| Quarter | Weight | Quantity | Source |
|---|---|---|---|
| Q2 2026 | 2.20% | 14,289 | SEC filing ↗Filed Jul 15, 2026 |
| Q1 2026 | 1.29% | 14,181 | SEC filing ↗Filed Apr 17, 2026 |
| Q4 2025 | 0.81% | 14,157 | SEC filing ↗Filed Jan 21, 2026 |
| Q3 2025 | Not reported | Not reported | — |
| Q2 2025 | Not reported | Not reported | — |
| Q1 2025 | Not reported | Not reported | — |
| Q4 2024 | 0.02% | 742 | SEC filing ↗Filed Feb 6, 2025 |
| Q3 2024 | Not reported | Not reported | — |
| Q2 2024 | Not reported | Not reported | No filing this quarter |
| Q1 2024 | Not reported | Not reported | No filing this quarter |
| Q4 2023 | Not reported | Not reported | No filing this quarter |
| Q3 2023 | Not reported | Not reported | No filing this quarter |
History & evidence by quarter
| Quarter | Weight | Quantity | Value | Change explained | Source |
|---|---|---|---|---|---|
| Q3 2023 | Not reported | — | — | The manager filed nothing for this quarter; a missing quarter is not treated as zero holdings. | — |
| Q4 2023 | Not reported | — | — | The manager filed nothing for this quarter; a missing quarter is not treated as zero holdings. | — |
| Q1 2024 | Not reported | — | — | The manager filed nothing for this quarter; a missing quarter is not treated as zero holdings. | — |
| Q2 2024 | Not reported | — | — | The manager filed nothing for this quarter; a missing quarter is not treated as zero holdings. | — |
| Q3 2024 | Not reported | — | — | This security is absent from this quarter's filing; a missing record is not treated as zero holdings. | — |
| Q4 2024 | 0.02% | 742 | $35.26K | A comparable prior-quarter record is unavailable; changes are not inferred. | SEC filing ↗ Filed Feb 6, 2025 |
| Q1 2025 | Not reported | — | — | This security is absent from this quarter's filing; a missing record is not treated as zero holdings. | — |
| Q2 2025 | Not reported | — | — | This security is absent from this quarter's filing; a missing record is not treated as zero holdings. | — |
| Q3 2025 | Not reported | — | — | This security is absent from this quarter's filing; a missing record is not treated as zero holdings. | — |
| Q4 2025 | 0.81% | 14,157 | $1.24M | A comparable prior-quarter record is unavailable; changes are not inferred. | SEC filing ↗ Filed Jan 21, 2026 |
| Q1 2026 | 1.29% | 14,181 | $1.93M | Shares increased 0.17%; reported value increased 55.55%, and weight changed +0.48 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Apr 17, 2026 |
| Q2 2026 | 2.20% | 14,289 | $3.65M | Shares increased 0.76%; reported value increased 89.29%, and weight changed +0.91 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Jul 15, 2026 |
Take these holdings further.
This page includes 12 of 12 reported holdings. Sign in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.
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Sources, coverage & how to read this data
Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.