Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionNational Asset Management, Inc.
Latest Disclosed Ownership9,169 shares
Latest Disclosed Value $ 1,178,626
National Asset Management, Inc. ownership in GLW / Corning Incorporated

On April 24, 2026 - National Asset Management, Inc. filed a 13F-HR form disclosing ownership of 9,169 shares of Corning Incorporated (MX:GLW) valued at $1,178,626 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 13,489 shares of Corning Incorporated. This represents a change in shares of -32.03% during the quarter.

National Asset Management, Inc. has a history of taking positions in derivatives of the underlying security (GLW) in the form of stock options. The firm currently holds call options representing 50,000 of underlying shares valued at $64,275 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:GLW / Corning Incorporated Historical Put/Call Ratio
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)
2026-04-24 2026-03-31 13F CORNING COM 219350105 9,169 -4,320 -32.03 1,179 -0.25 0.0746
2026-02-17 2025-12-31 13F CORNING COM 219350105 13,489 2,527 23.05 1,181 31.37 0.0545
2025-10-31 2025-09-30 13F CORNING COM 219350105 10,962 870 8.62 899 69.62 0.0416
2025-08-19 2025-06-30 13F CORNING COM 219350105 10,092 -73,979 -88.00 531 -86.73 0.0249
2025-02-25 2024-12-31 13F CORNING COM 219350105 84,071 -7,750 -8.44 3,995 -3.27 0.1310
2024-12-13 2024-09-30 13F CORNING COM 219350105 91,821 26,097 39.71 4,130 61.77 0.1149
2024-12-13 2024-09-30 13F CORNING COM 219350105 91,821 4,130
2024-08-19 2024-06-30 13F CORNING COM 219350105 65,724 -2,585 -3.78 2,553 22.68 0.0650
2024-05-16 2024-03-31 13F CORNING COM 219350105 68,309 3,540 5.47 2,081 5.53 0.0563
2024-03-15 2023-12-31 13F CORNING COM 219350105 64,769 -3,540 -5.18 1,972 -5.24 0.0531
2023-12-01 2023-09-30 13F CORNING COM 219350105 68,309 -88,668 -56.48 2,081 -62.16 0.0563
2023-07-27 2023-06-30 13F CORNING COM 219350105 156,977 84,068 115.31 5,500 113.84 0.1234
2023-05-17 2023-03-31 13F CORNING COM 219350105 72,909 -7,668 -9.52 2,572 -0.04 0.0685
2023-03-15 2022-12-31 13F/A-1 CORNING COM 219350105 80,577 -39,089 -32.67 2,574 -25.91 0.0721
2023-02-21 2022-12-31 13F CORNING COM 219350105 80,577 -39,089 2,574 0.0648
2022-11-22 2022-09-30 13F/A-1 CORNING COM 219350105 119,666 1,999 1.70 3,473 -6.34 0.1049
2022-11-14 2022-09-30 13F CORNING COM 219350105 119,666 1,999 3,473 0.0504
2022-08-12 2022-06-30 13F CORNING COM 219350105 117,667 -453 -0.38 3,708 -14.95 0.1560
2022-05-02 2022-03-31 13F CORNING COM 219350105 118,120 -6,149 -4.95 4,360 -5.77 0.1427
2022-01-28 2021-12-31 13F CORNING COM 219350105 124,269 -6,940 -5.29 4,627 -3.84 0.1333
2021-11-16 2021-09-30 13F CORNING COM 219350105 131,209 1,595 1.23 4,812 -9.46 0.1531
2021-08-10 2021-06-30 13F CORNING COM 219350105 129,614 1,035 0.80 5,315 -4.37 0.1727
2021-05-13 2021-03-31 13F CORNING COM 219350105 128,579 96,639 302.56 5,558 383.30 0.1965
2021-02-04 2020-12-31 13F CORNING COM 219350105 31,940 4,234 15.28 1,150 30.24 0.0615
2020-11-09 2020-09-30 13F CORNING COM 219350105 27,706 527 1.94 883 25.43 0.0471
2020-07-31 2020-06-30 13F CORNING COM 219350105 27,179 1,341 5.19 704 32.33 0.0470
2020-05-06 2020-03-31 13F CORNING COM 219350105 25,838 3,080 13.53 532 -19.76 0.0454
2020-02-10 2019-12-31 13F CORNING COM 219350105 22,758 -5,908 -20.61 663 -18.95 0.0564
2019-11-12 2019-09-30 13F CORNING COM 219350105 28,666 20,989 273.40 818 219.53 0.0806
2019-08-05 2019-06-30 13F CORNING COM 219350105 7,677 -7,715 -50.12 256 -49.80 0.0281
2019-05-08 2019-03-31 13F CORNING COM 219350105 15,392 7,597 97.46 510 116.10 0.0637
2019-02-08 2018-12-31 13F CORNING COM 219350105 7,795 110 1.43 236 -13.24 0.0336
2018-11-08 2018-09-30 13F CORNING COM 219350105 7,685 -1,277 -14.25 272 10.12 0.0324
2018-10-04 2018-06-30 13F CORNING COM 219350105 8,962 638 7.66 247 6.01 0.0326
2018-05-15 2018-03-31 13F CORNING COM 219350105 8,324 -700 -7.76 233 -19.38 0.0326
2018-02-15 2017-12-31 13F CORNING COM 219350105 9,024 -3,955 -30.47 289 -25.71 0.0391
2017-11-13 2017-09-30 13F CORNING COM 219350105 12,979 -217 -1.64 389 -2.02 0.0646
2017-08-15 2017-06-30 13F CORNING COM 219350105 13,196 -475 -3.47 397 7.30 0.0720
2017-05-15 2017-03-31 13F CORNING COM 219350105 13,671 -12,200 -47.16 370 -41.27 0.0738
2017-02-14 2016-12-31 13F CORNING COM 219350105 25,871 -941 -3.51 630 -0.94 0.1280
2016-11-14 2016-09-30 13F CORNING COM 219350105 26,812 -5,186 -16.21 636 -3.05 0.1247
2016-08-15 2016-06-30 13F CORNING COM 219350105 31,998 1,638 5.40 656 3.47 0.1313
2016-05-16 2016-03-31 13F CORNING COM 219350105 30,360 4,094 15.59 634 31.54 0.1466
2016-02-16 2015-12-31 13F CORNING COM 219350105 26,266 -123 -0.47 482 6.40 0.0976
2015-11-16 2015-09-30 13F CORNING COM 219350105 26,389 1,914 7.82 453 -6.40 0.1088
2015-08-17 2015-06-30 13F/A-1 CORNING COM 219350105 24,475 9,211 60.34 484 39.88 0.1203
2015-08-14 2015-06-30 13F CORNING COM 219350105 24,475 484
2015-05-14 2015-03-31 13F CORNING COM 219350105 15,264 -5,492 -26.46 346 -93.65 0.0843
2015-02-18 2014-12-31 13F Corning Lg Cap Core 219350105 20,756 -509 -2.39 5,448 1,225.55 0.1164
2014-11-20 2014-09-30 13F/A-1 CORNING COM 219350105 21,265 -34,856 -62.11 411 -36.67 0.1070
2014-08-14 2014-06-30 13F Corning Large Growth 219350105 56,121 36,670 188.53 649 60.25 0.1524
2014-05-02 2014-03-31 13F CORNING COM 219350105 19,451 -6,762 -25.80 405 -13.28 0.1224
2014-01-21 2013-12-31 13F CORNING COM 219350105 26,213 2,698 11.47 467 36.15 0.1491
2013-10-21 2013-09-30 13F CORNING COM 219350105 23,515 844 3.72 343 6.19 0.1173
2013-08-22 2013-06-30 13F CORNING COM 219350105 22,671 22,671 323 0.1096
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-04-24 2026-03-31 13F CORNING COM Call 50,000 64 n/a n/a n/a
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.