Datadog, Inc.
MX ˙ BMV ˙ US23804L1035
SecurityMX:DDOG / Datadog, Inc.
InstitutionBanco Santander, S.A.
Latest Disclosed Ownership179,222 shares
Latest Disclosed Value $ 21,157,157
Banco Santander, S.A. reports 2,538.33% increase in ownership of DDOG / Datadog, Inc.

On May 8, 2026 - Banco Santander, S.A. filed a 13F-HR form disclosing ownership of 179,222 shares of Datadog, Inc. (MX:DDOG) valued at $21,157,157 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 6,793 shares of Datadog, Inc.. This represents a change in shares of 2,538.33% 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)
2026-05-08 2026-03-31 13F DATADOG CL A COM 23804L103 179,222 172,429 2,538.33 21,157 2,192.20 0.1000
2026-02-13 2025-12-31 13F DATADOG CL A COM 23804L103 6,793 4,372 180.59 924 168.31 0.0069
2025-11-12 2025-09-30 13F DATADOG CL A COM 23804L103 2,421 2,421 345 0.0031
2022-11-08 2022-09-30 13F DATADOG CL A COM 23804L103 0 -11,095 -100.00 0 -100.00
2022-07-28 2022-06-30 13F DATADOG CL A COM 23804L103 11,095 -4,145 -27.20 1,057 -54.20 0.0141
2022-05-09 2022-03-31 13F DATADOG CL A COM 23804L103 15,240 -6,205 -28.93 2,308 -39.58 0.0248
2022-02-09 2021-12-31 13F DATADOG CL A COM 23804L103 21,445 -1,584 -6.88 3,820 17.36 0.0206
2021-11-08 2021-09-30 13F DATADOG CL A COM 23804L103 23,029 19,555 562.90 3,255 799.17 0.0175
2021-07-29 2021-06-30 13F DATADOG CL A COM 23804L103 3,474 -35,149 -91.01 362 -88.75 0.0020
2021-05-10 2021-03-31 13F DATADOG CL A COM 23804L103 38,623 13,262 52.29 3,219 28.91 0.0227
2021-02-12 2020-12-31 13F DATADOG CL A COM 23804L103 25,361 5,659 28.72 2,497 24.04 0.0179
2020-11-09 2020-09-30 13F DATADOG CL A COM 23804L103 19,702 19,702 2,013 0.0265
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.