Santander UK plc - Preferred Stock
GB ˙ LSE ˙ FR0000120578
166,00 £ 0,00 (0,00%)
2026-04-23
DEL PRIS
SecurityGB:SAN / Santander UK plc - Preferred Stock
InstitutionBLACKROCK SERIES, INC. - BlackRock International Fund Investor A
Latest Disclosed Ownership271,155 shares
Latest Disclosed Value $ 26,855,449
BLACKROCK SERIES, INC. - BlackRock International Fund Investor A reports 60.72% decrease in ownership of SAN / Santander UK plc - Preferred Stock

On July 24, 2025 - BLACKROCK SERIES, INC. - BlackRock International Fund Investor A filed a NPORT-P form disclosing ownership of 271,155 shares of Santander UK plc - Preferred Stock (GB:SAN) valued at $46,503,082 USD as of May 30, 2025. The entity filed a previous NPORT-P on July 25, 2022 disclosing 690,360 shares of Santander UK plc - Preferred Stock. This represents a change in shares of -60.72% during the quarter. The current value of the position is $45,011,730 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)
2025-07-24 2025-05-30 NP Sanofi EC FR0000120578 271,155 -419,205 -60.72 26,855 -63.65 2.2369
2022-07-25 2022-05-31 NP Sanofi EC FR0000120578 690,360 -182,152 -20.88 73,874 -19.00 3.3758
2022-04-25 2022-02-28 NP Sanofi EC FR0000120578 872,512 -29,444 -3.26 91,206 6.37 3.4748
2022-01-25 2021-11-30 NP Sanofi EC FR0000120578 901,956 273,175 43.45 85,742 31.58 3.3317
2021-10-26 2021-08-31 NP Sanofi EC FR0000120578 628,781 202,465 47.49 65,166 42.87 2.9061
2021-07-26 2021-05-28 NP Sanofi EC FR0000120578 426,316 137,173 47.44 45,613 71.90 2.6651
2021-04-27 2021-02-26 NP Sanofi EC FR0000120578 289,143 289,143 26,535 2.4422
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.