Companies, monthly, on the fixed panel of sites crawled since 2020of 54,527,857 in the indexlanding 12 Sept 2026
3,683 at Sept 26; 3,654 twelve months earlier, +29, +0.8% on the fixed panel; the series starts January 2021 because the panel is anchored at 31 Dec 2020
| Month | Companies | Observed on the panel |
|---|---|---|
| 2021-01 | 1,953 | 985 |
| 2021-02 | 1,953 | 985 |
| 2021-03 | 1,953 | 985 |
| 2021-04 | 1,953 | 985 |
| 2021-05 | 1,953 | 985 |
| 2021-06 | 1,953 | 985 |
| 2021-07 | 1,953 | 985 |
| 2021-08 | 1,956 | 986 |
| 2021-09 | 1,957 | 987 |
| 2021-10 | 1,958 | 987 |
| 2021-11 | 1,960 | 988 |
| 2021-12 | 1,961 | 989 |
| 2022-01 | 1,962 | 989 |
| 2022-02 | 1,963 | 990 |
| 2022-03 | 1,964 | 990 |
| 2022-04 | 1,966 | 991 |
| 2022-05 | 1,967 | 992 |
| 2022-06 | 1,968 | 992 |
| 2022-07 | 1,970 | 993 |
| 2022-08 | 1,971 | 994 |
| 2022-09 | 1,970 | 993 |
| 2022-10 | 1,970 | 993 |
| 2022-11 | 1,970 | 993 |
| 2022-12 | 1,970 | 993 |
| 2023-01 | 1,970 | 993 |
| 2023-02 | 1,970 | 993 |
| 2023-03 | 1,971 | 994 |
| 2023-04 | 2,175 | 1,097 |
| 2023-05 | 2,225 | 1,122 |
| 2023-06 | 2,275 | 1,147 |
| 2023-07 | 2,324 | 1,172 |
| 2023-08 | 2,374 | 1,197 |
| 2023-09 | 2,424 | 1,222 |
| 2023-10 | 2,474 | 1,248 |
| 2023-11 | 2,523 | 1,272 |
| 2023-12 | 2,573 | 1,298 |
| 2024-01 | 2,623 | 1,323 |
| 2024-02 | 2,673 | 1,348 |
| 2024-03 | 2,750 | 1,387 |
| 2024-04 | 2,813 | 1,419 |
| 2024-05 | 2,671 | 1,347 |
| 2024-06 | 2,684 | 1,354 |
| 2024-07 | 2,696 | 1,360 |
| 2024-08 | 2,710 | 1,367 |
| 2024-09 | 2,757 | 1,390 |
| 2024-10 | 2,843 | 1,434 |
| 2024-11 | 2,912 | 1,468 |
| 2024-12 | 2,971 | 1,498 |
| 2025-01 | 3,045 | 1,536 |
| 2025-02 | 3,108 | 1,567 |
| 2025-03 | 3,172 | 1,600 |
| 2025-04 | 3,216 | 1,622 |
| 2025-05 | 3,267 | 1,648 |
| 2025-06 | 3,364 | 1,696 |
| 2025-07 | 3,462 | 1,746 |
| 2025-08 | 3,613 | 1,822 |
| 2025-09 | 3,654 | 1,843 |
| 2025-10 | 3,661 | 1,846 |
| 2025-11 | 3,628 | 1,830 |
| 2025-12 | 3,613 | 1,822 |
| 2026-01 | 3,610 | 1,820 |
| 2026-02 | 3,679 | 1,855 |
| 2026-03 | 3,775 | 1,904 |
| 2026-04 | 3,803 | 1,918 |
| 2026-05 | 3,825 | 1,929 |
| 2026-06 | 3,864 | 1,949 |
| 2026-07 | 3,844 | 1,938 |
| 2026-08 | 3,816 | 1,924 |
| 2026-09 | 3,683 | 1,857 |
Shares of the same 3,683each row a different wholelanding 12 Sept 2026
Three wholes, three shares of one count: a share travels with its whole, never alone. Against the last of them, Rubicon Project is rank 3 of 24 technologies in Supply-side platforms.
Open as a segment
3,683 companies; add a country, a sector or a band on the segment page. Counting is free.
As recorded in the cataloguetaxonomy release tax-2026.10last discovered 10 Sept 2026
Supply-side ad platform formerly known as Rubicon Project, now part of Magnite.
Rubicon Project was an SSP and ad exchange for publishers; the company merged and rebranded as Magnite. Publishers use it to manage programmatic demand and monetize inventory.
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