It looks like a lot of mappings need adding as most people come up as unknown:
EDIT updated with newer mappings.
Top changeset contributors by employer
(Unknown) 11190 (62.7%)
(None) 4280 (24.0%)
Huawei 862 (4.8%)
Ferrous Systems 630 (3.5%)
Academics (various) 563 (3.2%)
Red Hat 124 (0.7%)
Google 102 (0.6%)
Microsoft 59 (0.3%)
IBM 28 (0.2%)
Funky 11 (0.1%)
Top lines changed by employer
(Unknown) 1018418 (56.9%)
(None) 484385 (27.0%)
Academics (various) 118247 (6.6%)
Ferrous Systems 100533 (5.6%)
Huawei 45443 (2.5%)
Red Hat 16009 (0.9%)
Microsoft 3359 (0.2%)
Google 2844 (0.2%)
Funky 447 (0.0%)
IBM 388 (0.0%)
the top contributors over the last year were:
Developers with the most changesets
Michael Goulet 1027 (5.7%)
Nicholas Nethercote 789 (4.4%)
Ralf Jung 763 (4.3%)
Camille Gillot 727 (4.1%)
Lukas Wirth 640 (3.6%)
Guillaume Gomez 583 (3.3%)
bjorn3 550 (3.1%)
Oliver Scherer 470 (2.6%)
Michael Howell 293 (1.6%)
Waffle Lapkin 266 (1.5%)
Esteban Küber 251 (1.4%)
Zalathar 249 (1.4%)
lcnr 247 (1.4%)
y21 221 (1.2%)
Jynn Nelson 188 (1.1%)
Urgau 187 (1.0%)
Nilstrieb 170 (1.0%)
Centri3 169 (0.9%)
hamidreza kalbasi 164 (0.9%)
Pietro Albini 156 (0.9%)
Developers with the most changed lines
Laurențiu Nicola 163716 (9.1%)
Philipp Krones 118974 (6.6%)
Lukas Wirth 100948 (5.6%)
Camille Gillot 94829 (5.3%)
Oleksandr Babak 89625 (5.0%)
Michael Goulet 83965 (4.7%)
Oliver Scherer 39890 (2.2%)
Nicholas Nethercote 39484 (2.2%)
Ralf Jung 38113 (2.1%)
hamidreza kalbasi 34576 (1.9%)
Ben Kimock 33647 (1.9%)
Guillaume Gomez 30774 (1.7%)
bjorn3 29218 (1.6%)
Zalathar 26214 (1.5%)
Esteban Küber 24612 (1.4%)
Alex Macleod 23724 (1.3%)
y21 20447 (1.1%)
Centri3 20168 (1.1%)
Urgau 19964 (1.1%)
Michael Howell 19795 (1.1%)
It looks like a lot of mappings need adding as most people come up as unknown:
EDIT updated with newer mappings.
Top changeset contributors by employer (Unknown) 11190 (62.7%) (None) 4280 (24.0%) Huawei 862 (4.8%) Ferrous Systems 630 (3.5%) Academics (various) 563 (3.2%) Red Hat 124 (0.7%) Google 102 (0.6%) Microsoft 59 (0.3%) IBM 28 (0.2%) Funky 11 (0.1%) Top lines changed by employer (Unknown) 1018418 (56.9%) (None) 484385 (27.0%) Academics (various) 118247 (6.6%) Ferrous Systems 100533 (5.6%) Huawei 45443 (2.5%) Red Hat 16009 (0.9%) Microsoft 3359 (0.2%) Google 2844 (0.2%) Funky 447 (0.0%) IBM 388 (0.0%)the top contributors over the last year were:
Developers with the most changesets Michael Goulet 1027 (5.7%) Nicholas Nethercote 789 (4.4%) Ralf Jung 763 (4.3%) Camille Gillot 727 (4.1%) Lukas Wirth 640 (3.6%) Guillaume Gomez 583 (3.3%) bjorn3 550 (3.1%) Oliver Scherer 470 (2.6%) Michael Howell 293 (1.6%) Waffle Lapkin 266 (1.5%) Esteban Küber 251 (1.4%) Zalathar 249 (1.4%) lcnr 247 (1.4%) y21 221 (1.2%) Jynn Nelson 188 (1.1%) Urgau 187 (1.0%) Nilstrieb 170 (1.0%) Centri3 169 (0.9%) hamidreza kalbasi 164 (0.9%) Pietro Albini 156 (0.9%) Developers with the most changed lines Laurențiu Nicola 163716 (9.1%) Philipp Krones 118974 (6.6%) Lukas Wirth 100948 (5.6%) Camille Gillot 94829 (5.3%) Oleksandr Babak 89625 (5.0%) Michael Goulet 83965 (4.7%) Oliver Scherer 39890 (2.2%) Nicholas Nethercote 39484 (2.2%) Ralf Jung 38113 (2.1%) hamidreza kalbasi 34576 (1.9%) Ben Kimock 33647 (1.9%) Guillaume Gomez 30774 (1.7%) bjorn3 29218 (1.6%) Zalathar 26214 (1.5%) Esteban Küber 24612 (1.4%) Alex Macleod 23724 (1.3%) y21 20447 (1.1%) Centri3 20168 (1.1%) Urgau 19964 (1.1%) Michael Howell 19795 (1.1%)