DuPont de Nemours, Inc.
MX ˙ BMV ˙ US26614N1028
SecurityMX:DD / DuPont de Nemours, Inc.
InstitutionMariner, LLC
Latest Disclosed Ownership166,698 shares
Latest Disclosed Value $ 7,631,590
Mariner, LLC reports 13.72% increase in ownership of DD / DuPont de Nemours, Inc.

On May 13, 2026 - Mariner, LLC filed a 13F-HR form disclosing ownership of 166,698 shares of DuPont de Nemours, Inc. (MX:DD) valued at $7,631,590 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 146,583 shares of DuPont de Nemours, Inc.. This represents a change in shares of 13.72% 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 DUPONT DE NEMOURS COM 26614N102 166,698 20,115 13.72 7,632 29.40 0.0089
2026-02-13 2025-12-31 13F DUPONT DE NEMOURS COM 26614N102 146,583 11,386 8.42 5,898 -44.00 0.0070
2025-11-14 2025-09-30 13F DUPONT DE NEMOURS COM 26614N102 135,197 21,168 18.56 10,532 34.65 0.0136
2025-08-14 2025-06-30 13F DUPONT DE NEMOURS COM 26614N102 114,029 7,438 6.98 7,822 -1.73 0.0113
2025-05-15 2025-03-31 13F DUPONT DE NEMOURS COM 26614N102 106,591 1,337 1.27 7,960 -0.82 0.0132
2025-02-13 2024-12-31 13F DUPONT DE NEMOURS COM 26614N102 105,254 -1,591 -1.49 8,026 -15.73 0.0135
2024-11-13 2024-09-30 13F DUPONT DE NEMOURS COM 26614N102 106,845 -15,848 -12.92 9,523 -3.56 0.0169
2024-08-13 2024-06-30 13F DUPONT DE NEMOURS COM 26614N102 122,693 10,258 9.12 9,875 14.56 0.0191
2024-05-15 2024-03-31 13F DUPONT DE NEMOURS COM 26614N102 112,435 -6,546 -5.50 8,620 -5.82 0.0178
2024-02-14 2023-12-31 13F DUPONT DE NEMOURS COM 26614N102 118,981 8,398 7.59 9,153 10.97 0.0217
2023-11-13 2023-09-30 13F DUPONT DE NEMOURS COM 26614N102 110,583 2,129 1.96 8,248 6.56 0.0221
2023-08-11 2023-06-30 13F DUPONT DE NEMOURS COM 26614N102 108,454 139 0.13 7,741 110,471.43 0.0207
2023-05-15 2023-03-31 13F DUPONT DE NEMOURS COM 26614N102 108,315 3,440 3.28 8 -99.90 0.0226
2023-02-14 2022-12-31 13F DUPONT DE NEMOURS COM 26614N102 104,875 3,304 3.25 7,197 40.59 0.0231
2022-11-10 2022-09-30 13F DUPONT DE NEMOURS COM 26614N102 101,571 9,650 10.50 5,119 0.20 0.0205
2022-08-15 2022-06-30 13F DUPONT DE NEMOURS COM 26614N102 91,921 -330 -0.36 5,109 -24.73 0.0210
2022-05-13 2022-03-31 13F DUPONT DE NEMOURS COM 26614N102 92,251 45,920 99.11 6,788 81.35 0.0256
2022-02-14 2021-12-31 13F DUPONT DE NEMOURS COM 26614N102 46,331 2,945 6.79 3,743 26.88 0.0158
2021-11-15 2021-09-30 13F DUPONT DE NEMOURS COM 26614N102 43,386 3,703 9.33 2,950 -3.97 0.0154
2021-08-24 2021-06-30 13F DUPONT DE NEMOURS COM 26614N102 39,683 127 0.32 3,072 0.49 0.0191
2021-05-07 2021-03-31 13F DUPONT DE NEMOURS COM 26614N102 39,556 1,476 3.88 3,057 12.89 0.0213
2021-02-16 2020-12-31 13F DUPONT DE NEMOURS COM 26614N102 38,080 2,778 7.87 2,708 38.23 0.0208
2020-11-13 2020-09-30 13F DUPONT DE NEMOURS COM 26614N102 35,302 13 0.04 1,959 4.48 0.0184
2020-08-14 2020-06-30 13F DUPONT DE NEMOURS COM 26614N102 35,289 6,058 20.72 1,875 88.06 0.0188
2020-05-14 2020-03-31 13F DUPONT DE NEMOURS COM 26614N102 29,231 -3,538 -10.80 997 -52.61 0.0125
2020-02-13 2019-12-31 13F DUPONT DE NEMOURS COM 26614N102 32,769 5,140 18.60 2,104 6.80 0.0219
2019-11-13 2019-09-30 13F DUPONT DE NEMOURS COM 26614N102 27,629 -5,549 -16.72 1,970 -20.92 0.0236
2019-08-14 2019-06-30 13F DUPONT DE NEMOURS COM 26614N102 33,178 29,622 833.01 2,491 767.94 0.0297
2017-08-11 2017-06-30 13F DU PONT E I DE NEMOURS COM 263534109 3,556 -824 -18.81 287 -18.47 0.0135
2017-05-15 2017-03-31 13F DU PONT E I DE NEMOURS COM 263534109 4,380 83 1.93 352 11.75 0.0153
2017-02-14 2016-12-31 13F DU PONT E I DE NEMOURS COM 263534109 4,297 -3,672 -46.08 315 -41.12 0.0145
2016-11-14 2016-09-30 13F DU PONT E I DE NEMOURS COM 263534109 7,969 3,250 68.87 535 74.84 0.0258
2016-08-12 2016-06-30 13F DU PONT E I DE NEMOURS COM 263534109 4,719 -2,260 -32.38 306 -30.77 0.0166
2016-05-13 2016-03-31 13F DU PONT E I DE NEMOURS COM 263534109 6,979 813 13.19 442 7.54 0.0262
2016-02-16 2015-12-31 13F DU PONT E I DE NEMOURS COM 263534109 6,166 594 10.66 411 52.79 0.0264
2015-11-16 2015-09-30 13F DU PONT E I DE NEMOURS COM 263534109 5,572 -7,213 -56.42 269 -67.11 0.0120
2015-08-17 2015-06-30 13F E.I. Du Pont De Nemours COS 263534109 12,785 4,157 48.18 818 32.79 0.0379
2015-05-15 2015-03-31 13F DU PONT E I DE NEMOURS COM 263534109 8,628 -745 -7.95 616 -11.11 0.0524
2015-02-13 2014-12-31 13F DU PONT E I DE NEMOURS COM 263534109 9,373 2,514 36.65 693 40.57 0.0624
2014-11-13 2014-09-30 13F DU PONT E I DE NEMOURS COM 263534109 6,859 -2,204 -24.32 493 -16.30 0.0555
2014-02-14 2013-12-31 13F DU PONT E I DE NEMOURS COM 263534109 9,063 -2,791 -23.54 589 -15.13 0.0738
2013-11-14 2013-09-30 13F DU PONT E I DE NEMOURS COM 263534109 11,854 5,984 101.94 694 125.32 0.1279
2013-08-19 2013-06-30 13F DU PONT E I DE NEMOURS COM 263534109 5,870 5,870 308 0.0649
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.