Banco Santander, S.A. - Depositary Receipt (Common Stock)
US ˙ NYSE ˙ US05964H1059

SecuritySAN / Banco Santander, S.A. - Depositary Receipt (Common Stock)
InstitutionSimplex Trading, Llc
Latest Disclosed Ownership14,008 shares
Latest Disclosed Value $ 158,010
Simplex Trading, Llc ownership in SAN / Banco Santander, S.A. - Depositary Receipt (Common Stock)

On May 14, 2026 - Simplex Trading, Llc filed a 13F-HR form disclosing ownership of 14,008 shares of Banco Santander, S.A. - Depositary Receipt (Common Stock) (US:SAN) valued at $158,010 USD as of March 31, 2026. The entity filed a previous 13F-HR on November 12, 2025 disclosing 0 shares of Banco Santander, S.A. - Depositary Receipt (Common Stock). The current value of the position is $170,337 USD.

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)
2026-05-14 2026-03-31 13F BANCO SANTANDER COM 05964H105 14,008 14,008 158 0.0001
2025-11-12 2025-09-30 13F BANCO SANTANDER COM 05964H105 0 -140,540 -100.00 0 -100.00
2025-08-05 2025-06-30 13F BANCO SANTANDER COM 05964H105 140,540 94,222 203.42 1 0.0007
2025-05-12 2025-03-31 13F BANCO SANTANDER COM 05964H105 46,318 22,332 93.10 0 0.0002
2025-02-11 2024-12-31 13F BANCO SANTANDER COM 05964H105 23,986 10,976 84.37 0 0.0001
2024-11-08 2024-09-30 13F BANCO SANTANDER COM 05964H105 13,010 -11,129 -46.10 0 0.0000
2024-07-25 2024-06-30 13F BANCO SANTANDER COM 05964H105 24,139 24,139 0 0.0001
2024-04-25 2024-03-31 13F BANCO SANTANDER COM 05964H105 0 -56,818 -100.00 0 0.0000
2024-02-02 2023-12-31 13F BANCO SANTANDER COM 05964H105 56,818 -3,434 -5.70 0 0.0002
2023-11-01 2023-09-30 13F BANCO SANTANDER COM 05964H105 60,252 36,634 155.11 0 0.0002
2023-08-04 2023-06-30 13F BANCO SANTANDER COM 05964H105 23,618 -11,577 -32.89 0 0.0001
2023-04-27 2023-03-31 13F BANCO SANTANDER COM 05964H105 35,195 -338,290 -90.58 0 -100.00 0.0001
2023-02-02 2022-12-31 13F BANCO SANTANDER COM 05964H105 373,485 -25,524 -6.40 1 -99.89 0.0012
2022-11-04 2022-09-30 13F BANCO SANTANDER COM 05964H105 399,009 101,777 34.24 925 11.18 0.0010
2022-08-03 2022-06-30 13F BANCO SANTANDER COM 05964H105 297,232 51,312 20.87 832 0.12 0.0009
2022-05-02 2022-03-31 13F BANCO SANTANDER COM 05964H105 245,920 -166,607 -40.39 831 -38.76 0.0008
2022-02-23 2021-12-31 13F/A-1 BANCO SANTANDER COM 05964H105 412,527 159,397 62.97 1,357 35.43 0.0014
2022-02-04 2021-12-31 13F BANCO SANTANDER COM 05964H105 253,130 0 1,002 0.0004
2021-10-28 2021-09-30 13F BANCO SANTANDER COM 05964H105 253,130 0 0.00 1,002 1.31 0.0009
2021-08-12 2021-06-30 13F BANCO SANTANDER COM 05964H105 253,130 -9,516 -3.62 989 9.89 0.0010
2021-04-26 2021-03-31 13F BANCO SANTANDER COM 05964H105 262,646 74,952 39.93 900 0.0016
2021-02-02 2020-12-31 13F BANCO SANTANDER COM 05964H105 187,694 16,782 9.82 0 -100.00
2020-10-14 2020-09-30 13F BANCO SANTANDER COM 05964H105 170,912 19,101 12.58 316 -13.42 0.0004
2020-07-13 2020-06-30 13F BANCO SANTANDER COM 05964H105 151,811 142,705 1,567.15 365 1,638.10 0.0006
2020-04-29 2020-03-31 13F BANCO SANTANDER COM 05964H105 9,106 -14,616 -61.61 21 -78.57 0.0000
2020-02-05 2019-12-31 13F BANCO SANTANDER COM 05964H105 23,722 -198,553 -89.33 98 -89.03 0.0002
2019-10-15 2019-09-30 13F BANCO SANTANDER COM 05964H105 222,275 15,551 7.52 893 -5.60 0.0025
2019-07-26 2019-06-30 13F BANCO SANTANDER COM 05964H105 206,724 185,207 860.75 946 855.56 0.0026
2019-04-18 2019-03-31 13F BANCO SANTANDER COM 05964H105 21,517 -10,980 -33.79 99 -31.72 0.0003
2019-01-16 2018-12-31 13F BANCO SANTANDER COM 05964H105 32,497 32,497 145 0.0004
2018-10-23 2018-09-30 13F BANCO SANTANDER COM 05964H105 0 -39,836 -100.00 0 -100.00
2018-07-30 2018-06-30 13F BANCO SANTANDER COM 05964H105 39,836 23,691 146.74 212 101.90 0.0008
2018-04-26 2018-03-31 13F BANCO SANTANDER COM 05964H105 16,145 16,145 105 0.0046
2017-07-12 2017-06-30 13F BANCO SANTANDER COM 05964H105 0 -36,269 -100.00 0 -100.00
2017-04-21 2017-03-31 13F BANCO SANTANDER COM 05964H105 36,269 -73,966 -67.10 220 -61.47 0.0095
2017-01-11 2016-12-31 13F BANCO SANTANDER COM 05964H105 110,235 66,828 153.96 571 198.95 0.0341
2016-10-07 2016-09-30 13F BANCO SANTANDER COM 05964H105 43,407 -55,172 -55.97 191 -50.52 0.0129
2016-07-18 2016-06-30 13F BANCO SANTANDER COM 05964H105 98,579 87,508 790.43 386 704.17 0.0258
2016-04-14 2016-03-31 13F BANCO SANTANDER COM 05964H105 11,071 3,787 51.99 48 37.14 0.0038
2016-01-20 2015-12-31 13F BANCO SANTANDER COM 05964H105 7,284 -11,050 -60.27 35 -63.54 0.0027
2015-10-08 2015-09-30 13F BANCO SANTANDER COM 05964H105 18,334 -51,305 -73.67 96 -80.33 0.0070
2015-07-08 2015-06-30 13F BANCO SANTANDER COM 05964H105 69,639 69,639 488 0.0409
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.