Datadog, Inc.
MX ˙ BMV ˙ US23804L1035
SecurityMX:DDOG / Datadog, Inc.
InstitutionWestpac Banking Corp
Latest Disclosed Ownership10,915 shares
Latest Disclosed Value $ 1,288,516
Westpac Banking Corp reports 54.47% decrease in ownership of DDOG / Datadog, Inc.

On May 11, 2026 - Westpac Banking Corp filed a 13F-HR form disclosing ownership of 10,915 shares of Datadog, Inc. (MX:DDOG) valued at $1,288,516 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 23,975 shares of Datadog, Inc.. This represents a change in shares of -54.47% 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)
2026-05-11 2026-03-31 13F DATADOG CL A COM 23804L103 10,915 -13,060 -54.47 1,289 -60.49 0.0449
2026-02-10 2025-12-31 13F DATADOG CL A COM 23804L103 23,975 6,069 33.89 3,260 27.89 0.2059
2025-11-14 2025-09-30 13F/A-1 DATADOG INC USD 0.00001 CL A COM 23804L103 17,906 16,790 1,504.48 2,550 1,610.74 0.1580
2025-11-12 2025-09-30 13F DATADOG INC USD 0.00001 CL A COM 23804L103 17,906 16,790 2,550 0.0640
2025-08-11 2025-06-30 13F DATADOG CL A COM 23804L103 1,116 0 0.00 150 35.45 0.0100
2025-05-13 2025-03-31 13F DATADOG CL A COM 23804L103 1,116 -404 -26.58 111 -49.31 0.0081
2025-02-12 2024-12-31 13F DATADOG CL A COM 23804L103 1,520 381 33.45 217 65.65 0.0144
2024-11-08 2024-09-30 13F DATADOG CL A COM 23804L103 1,139 0 0.00 131 -10.88 0.0088
2024-08-14 2024-06-30 13F/A-1 DATADOG CL A COM 23804L103 1,139 -18,431 -94.18 148 -93.92 0.0117
2024-08-13 2024-06-30 13F DATADOG CL A COM 23804L103 130 -19,440 148 0.0051
2024-05-09 2024-03-31 13F DATADOG CL A COM 23804L103 19,570 -2,425 -11.03 2,419 -9.40 0.1843
2024-02-08 2023-12-31 13F DATADOG CL A COM 23804L103 21,995 434 2.01 2,670 35.97 0.2201
2023-11-13 2023-09-30 13F DATADOG CL A COM 23804L103 21,561 20,956 3,463.80 1,964 3,227.12 0.1470
2023-08-10 2023-06-30 13F DATADOG CL A COM 23804L103 605 -19,552 -97.00 60 -95.97 0.0042
2023-05-04 2023-03-31 13F DATADOG CL A COM 23804L103 20,157 0 0.00 1,465 -1.15 0.0197
2023-02-06 2022-12-31 13F DATADOG CL A COM 23804L103 20,157 -17,169 -46.00 1,482 -55.30 0.0219
2022-11-08 2022-09-30 13F DATADOG CL A COM 23804L103 37,326 4,493 13.68 3,314 5.95 0.0505
2022-08-10 2022-06-30 13F DATADOG CL A COM 23804L103 32,833 6,000 22.36 3,127 -23.06 0.0407
2022-05-11 2022-03-31 13F DATADOG CL A COM 23804L103 26,833 -43,527 -61.86 4,064 -67.57 0.0466
2022-02-08 2021-12-31 13F DATADOG CL A COM 23804L103 70,360 29,187 70.89 12,532 115.35 0.1298
2021-10-27 2021-09-30 13F DATADOG CL A COM 23804L103 41,173 -1,142 -2.70 5,820 32.13 0.0622
2021-08-11 2021-06-30 13F DATADOG CL A COM 23804L103 42,315 -15,100 -26.30 4,404 -7.94 0.0442
2021-05-13 2021-03-31 13F DATADOG CL A COM 23804L103 57,415 -9,600 -14.33 4,785 -27.47 0.0528
2021-02-11 2020-12-31 13F DATADOG CL A COM 23804L103 67,015 -12,724 -15.96 6,597 -19.03 0.0749
2020-11-10 2020-09-30 13F DATADOG CL A COM 23804L103 79,739 -9,000 -10.14 8,146 5.59 0.1104
2020-08-12 2020-06-30 13F DATADOG CL A COM 23804L103 88,739 -10,629 -10.70 7,716 115.80 0.1150
2020-05-14 2020-03-31 13F DATADOG CL A COM 23804L103 99,368 73,974 291.31 3,575 272.78 0.0616
2020-02-11 2019-12-31 13F DATADOG CL A COM 23804L103 25,394 12,900 103.25 959 126.71 0.0123
2019-11-13 2019-09-30 13F DATADOG CLA COM 23804L103 12,494 12,494 424 0.0059
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.