Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionMackenzie Financial Corp
Latest Disclosed Ownership642,143 shares
Latest Disclosed Value $ 87,312,184
Mackenzie Financial Corp reports 306.46% increase in ownership of GLW / Corning Incorporated

On May 13, 2026 - Mackenzie Financial Corp filed a 13F-HR form disclosing ownership of 642,143 shares of Corning Incorporated (MX:GLW) valued at $87,312,184 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 18, 2026 disclosing 157,985 shares of Corning Incorporated. This represents a change in shares of 306.46% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F CORNING COM 219350105 642,143 484,158 306.46 87,312 523.21 0.1048
2026-02-18 2025-12-31 13F CORNING COM 219350105 157,985 56,831 56.18 14,011 68.86 0.0166
2025-11-13 2025-09-30 13F CORNING COM 219350105 101,154 1,278 1.28 8,298 57.98 0.0101
2025-08-13 2025-06-30 13F CORNING COM 219350105 99,876 4,219 4.41 5,252 19.94 0.0068
2025-05-07 2025-03-31 13F CORNING COM 219350105 95,657 -6,604 -6.46 4,379 -9.88 0.0062
2025-05-02 2024-12-31 13F/A-2 CORNING COM 219350105 102,261 19,942 24.23 4,859 30.76 0.0066
2025-02-20 2024-12-31 13F/A-1 CORNING COM 219350105 102,261 19,942 4,859 0.0063
2025-02-14 2024-12-31 13F Corning Common Stock 219350105 102,261 19,942 4,694 0.0067
2024-11-13 2024-09-30 13F CORNING COM 219350105 82,319 -17,696 -17.69 3,717 -4.35 0.0052
2024-08-14 2024-06-30 13F CORNING COM 219350105 100,015 -19,731 -16.48 3,886 -1.55 0.0058
2024-05-10 2024-03-31 13F CORNING COM 219350105 119,746 -33,694 -21.96 3,947 -15.54 0.0057
2024-01-30 2023-12-31 13F CORNING COM 219350105 153,440 53,830 54.04 4,672 56.25 0.0070
2023-10-25 2023-09-30 13F CORNING COM 219350105 99,610 11,739 13.36 2,990 -3.20 0.0050
2023-08-03 2023-06-30 13F CORNING COM 219350105 87,871 12,850 17.13 3,090 16.74 0.0047
2023-04-24 2023-03-31 13F CORNING COM 219350105 75,021 957 1.29 2,647 11.88 0.0041
2023-02-14 2022-12-31 13F CORNING COM 219350105 74,064 -13,749 -15.66 2,366 -7.18 0.0040
2022-10-07 2022-09-30 13F Corning Common Stock 219350105 87,813 -34,388 -28.14 2,548 -33.84 0.0044
2022-08-10 2022-06-30 13F CORNING COM 219350105 122,201 34,763 39.76 3,851 19.34 0.0062
2022-05-13 2022-03-31 13F CORNING COM 219350105 87,438 39,505 82.42 3,227 80.78 0.0043
2022-02-14 2021-12-31 13F CORNING COM 219350105 47,933 -1,237 -2.52 1,785 -0.50 0.0024
2021-11-08 2021-09-30 13F CORNING COM 219350105 49,170 14,770 42.94 1,794 27.51 0.0025
2021-08-11 2021-06-30 13F CORNING COM 219350105 34,400 -571 -1.63 1,407 -7.56 0.0020
2021-05-14 2021-03-31 13F CORNING COM 219350105 34,971 9,960 39.82 1,522 69.11 0.0023
2021-02-10 2020-12-31 13F CORNING COM 219350105 25,011 -30,111 -54.63 900 -49.64 0.0019
2020-11-13 2020-09-30 13F CORNING COM 219350105 55,122 28,533 107.31 1,787 159.36 0.0044
2020-08-13 2020-06-30 13F CORNING COM 219350105 26,589 -7,504 -22.01 689 -1.57 0.0018
2020-05-14 2020-03-31 13F CORNING COM 219350105 34,093 -47,720 -58.33 700 -70.61 0.0023
2020-02-13 2019-12-31 13F CORNING COM 219350105 81,813 -295,419 -78.31 2,382 -77.86 0.0059
2019-11-14 2019-09-30 13F CORNING COM 219350105 377,232 -72,142 -16.05 10,759 -27.95 0.0283
2019-08-23 2019-06-30 13F/A-1 CORNING COM 219350105 449,374 -332,186 -42.50 14,933 -42.28 0.0385
2019-08-14 2019-06-30 13F CORNING COM 219350105 449,374 -332,186 14,933
2019-05-15 2019-03-31 13F CORNING COM 219350105 781,560 -293,035 -27.27 25,870 -20.31 0.0624
2019-02-06 2018-12-31 13F CORNING COM 219350105 1,074,595 573,340 114.38 32,464 83.47 0.0853
2018-11-15 2018-09-30 13F CORNING COM 219350105 501,255 -372,554 -42.64 17,694 -26.39 0.0430
2018-08-13 2018-06-30 13F CORNING COM 219350105 873,809 -137,556 -13.60 24,038 -14.75 0.0613
2018-05-14 2018-03-31 13F/A-1 CORNING COM 219350105 1,011,365 331,227 48.70 28,197 29.59 0.0719
2018-05-14 2018-03-31 13F CORNING COM 219350105 1,011,365 28,197
2018-02-13 2017-12-31 13F CORNING COM 219350105 680,138 224,003 49.11 21,758 59.42 0.0525
2017-11-13 2017-09-30 13F CORNING COM 219350105 456,135 7,035 1.57 13,648 1.13 0.0736
2017-08-14 2017-06-30 13F CORNING COM 219350105 449,100 327,735 270.04 13,495 311.81 0.0751
2017-05-25 2017-03-31 13F/A-1 CORNING COM 219350105 121,365 121,365 3,277 0.0192
2017-05-12 2017-03-31 13F CORNING COM 219350105 121,365 3,277
2017-02-14 2016-12-31 13F CORNING COM 219350105 0 -119,328 -100.00 0 -100.00
2016-11-15 2016-09-30 13F CORNING COM 219350105 119,328 -530,672 -81.64 2,822 -78.80 0.0176
2016-08-12 2016-06-30 13F CORNING COM 219350105 650,000 -100,000 -13.33 13,312 -15.04 0.0752
2016-05-12 2016-03-31 13F CORNING COM 219350105 750,000 -200,000 -21.05 15,668 -9.78 0.1421
2016-02-12 2015-12-31 13F CORNING COM 219350105 950,000 911,956 2,397.11 17,366 2,567.59 0.1078
2015-11-13 2015-09-30 13F CORNING COM 219350105 38,044 -11,980 -23.95 651 -34.04 0.0040
2015-08-13 2015-06-30 13F CORNING COM 219350105 50,024 700 1.42 987 -11.80 0.0054
2015-05-13 2015-03-31 13F CORNING COM 219350105 49,324 10,053 25.60 1,119 24.33 0.0059
2015-02-11 2014-12-31 13F CORNING COM 219350105 39,271 12,141 44.75 900 71.43 0.0046
2014-11-12 2014-09-30 13F CORNING COM 219350105 27,130 -55,708 -67.25 525 -71.12 0.0026
2014-08-11 2014-06-30 13F CORNING COM 219350105 82,838 3,720 4.70 1,818 10.38 0.0085
2014-05-14 2014-03-31 13F CORNING COM 219350105 79,118 16,649 26.65 1,647 47.98 0.0081
2014-02-11 2013-12-31 13F/A-1 CORNING COM 219350105 62,469 30,473 95.24 1,113 138.33 0.0056
2014-02-03 2013-12-31 13F CORNING COM 219350105 62,469 1,113
2013-11-12 2013-09-30 13F CORNING COM 219350105 31,996 31,996 467 0.0024
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.