SEC Form 4 · accession 0001561550-26-000315
Datadog, Inc. · DDOG
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
David M Obstler
Officer — Chief Financial Officer
Period of report
Sep 14, 2026
Accepted (ET)
Sep 16, 2026 · 4:38 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001561550
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Class A Common StockF2 | Sep 14, 2026 | C | 12,000 | $0.00 | A | 12,000 | I | By Trust |
| Class A Common StockF4,F2 | Sep 14, 2026 | S | 798 | $221.2365 | D | 11,202 | I | By Trust |
| Class A Common StockF5,F2 | Sep 14, 2026 | S | 1,624 | $222.1661 | D | 9,578 | I | By Trust |
| Class A Common StockF6,F2 | Sep 14, 2026 | S | 738 | $223.1165 | D | 8,840 | I | By Trust |
| Class A Common StockF7,F2 | Sep 14, 2026 | S | 545 | $224.3433 | D | 8,295 | I | By Trust |
| Class A Common StockF8,F2 | Sep 14, 2026 | S | 1,182 | $225.1332 | D | 7,113 | I | By Trust |
| Class A Common StockF9,F2 | Sep 14, 2026 | S | 190 | $226.1915 | D | 6,923 | I | By Trust |
| Class A Common StockF10,F2 | Sep 14, 2026 | S | 169 | $227.7159 | D | 6,754 | I | By Trust |
| Class A Common StockF11,F2 | Sep 14, 2026 | S | 360 | $228.5859 | D | 6,394 | I | By Trust |
| Class A Common StockF12,F2 | Sep 14, 2026 | S | 2,873 | $229.9209 | D | 3,521 | I | By Trust |
| Class A Common StockF13,F2 | Sep 14, 2026 | S | 1,689 | $230.5094 | D | 1,832 | I | By Trust |
| Class A Common StockF14,F2 | Sep 14, 2026 | S | 724 | $231.5317 | D | 1,108 | I | By Trust |
| Class A Common StockF15,F2 | Sep 14, 2026 | S | 918 | $232.7079 | D | 190 | I | By Trust |
| Class A Common StockF16,F2 | Sep 14, 2026 | S | 190 | $233.2997 | D | 0 | I | By Trust |
| Class A Common StockF17 | Sep 14, 2026 | C | 12,000 | $0.00 | A | 12,000 | I | By Trust |
| Class A Common StockF4,F17 | Sep 14, 2026 | S | 786 | $221.2389 | D | 11,214 | I | By Trust |
| Class A Common StockF5,F17 | Sep 14, 2026 | S | 1,635 | $222.1623 | D | 9,579 | I | By Trust |
| Class A Common StockF6,F17 | Sep 14, 2026 | S | 725 | $223.1157 | D | 8,854 | I | By Trust |
| Class A Common StockF7,F17 | Sep 14, 2026 | S | 525 | $224.3448 | D | 8,329 | I | By Trust |
| Class A Common StockF8,F17 | Sep 14, 2026 | S | 1,169 | $225.1313 | D | 7,160 | I | By Trust |
| Class A Common StockF9,F17 | Sep 14, 2026 | S | 181 | $226.1915 | D | 6,979 | I | By Trust |
| Class A Common StockF10,F17 | Sep 14, 2026 | S | 163 | $227.7183 | D | 6,816 | I | By Trust |
| Class A Common StockF11,F17 | Sep 14, 2026 | S | 358 | $228.5972 | D | 6,458 | I | By Trust |
| Class A Common StockF12,F17 | Sep 14, 2026 | S | 2,935 | $229.9168 | D | 3,523 | I | By Trust |
| Class A Common StockF18,F17 | Sep 14, 2026 | S | 1,729 | $230.5063 | D | 1,794 | I | By Trust |
| Class A Common StockF14,F17 | Sep 14, 2026 | S | 713 | $231.5314 | D | 1,081 | I | By Trust |
| Class A Common StockF15,F17 | Sep 14, 2026 | S | 899 | $232.7071 | D | 182 | I | By Trust |
| Class A Common StockF16,F17 | Sep 14, 2026 | S | 182 | $233.2996 | D | 0 | I | By Trust |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Class B Common StockF2,F1 | — | Sep 14, 2026 | C | 12,000 | D | — | — | Class A Common Stock | 12,000 | 34,199 | I |
| Class B Common StockF17,F1 | — | Sep 14, 2026 | C | 12,000 | D | — | — | Class A Common Stock | 12,000 | 34,198 | I |
| Class B Common StockF1 | — | holding | — | — | — | — | — | Class A Common Stock | 8,103 | 8,103 | D |
Explanation of responses
- F1Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon the earliest of: (i) any transfer, whether or not for value, except for certain "Permitted Transfers" as defined in the Issuer's amended and restated certificate of incorporation, (ii) the death of the Reporting Person in the case of shares held directly or in a trustee capacity, and (iii) the tenth anniversary of the Issuer's initial public offering of its Class A Common Stock.
- F10Price reported is a weighted-average sales price. The shares were sold at prices ranging from $227.095 to $228.07. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
- F11Price reported is a weighted-average sales price. The shares were sold at prices ranging from $228.13 to $229.12. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
- F12Price reported is a weighted-average sales price. The shares were sold at prices ranging from $229.13 to $230.12. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
- F13Price reported is a weighted-average sales price. The shares were sold at prices ranging from $230.13 to $231.11. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
- F14Price reported is a weighted-average sales price. The shares were sold at prices ranging from $231.13 to $232.10. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
- F15Price reported is a weighted-average sales price. The shares were sold at prices ranging from $232.13 to $233.12. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
- F16Price reported is a weighted-average sales price. The shares were sold at prices ranging from $233.13 to $233.49. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
- F17Shares are held directly by Obstler Children 2019 Trust FBO the Reporting Person's other child, of which the Reporting Person's spouse is Trustee. See Footnote 2.
- F18Price reported is a weighted-average sales price. The shares were sold at prices ranging from $230.13 to $231.10. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
- F2Shares are held directly by Obstler Children 2019 Trust FBO the Reporting Person's child, of which the Reporting Person's spouse is Trustee. Obstler Children 2019 Trust FBO the Reporting Person's child and Obstler Children 2019 Trust FBO the Reporting Person's other child are separate trusts for the benefit of the Reporting Person's children with substantially identical terms.
- F3Shares sold pursuant to a 10b5-1 plan dated June 13, 2026.
- F4Price reported is a weighted-average sales price. The shares were sold at prices ranging from $220.67 to $221.57. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
- F5Price reported is a weighted-average sales price. The shares were sold at prices ranging from $221.68 to $222.65. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
- F6Price reported is a weighted-average sales price. The shares were sold at prices ranging from $222.70 to $223.60. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
- F7Price reported is a weighted-average sales price. The shares were sold at prices ranging from $223.82 to $224.81. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
- F8Price reported is a weighted-average sales price. The shares were sold at prices ranging from $224.82 to $225.78. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
- F9Price reported is a weighted-average sales price. The shares were sold at prices ranging from $225.96 to $226.54. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price.
Remarks
Due to the 30 line limitation in Table I, this report is being filed across two forms. This is the second of two filings.