A Sigma 400 is a very fast cruiser racer of Rob Humphreys hull design based on the 1988 Whitbread Maxi “Rothmans”. She delivers spectacularly in heavy weather with balance, stability and no slamming.


There were only about 25 of these made?

No Boat Name Boat No Location Previous Names Current Owner Notes
1 Baiji
2 Dream Machine
3 Intemperance S4015 Brighton Jagga / Jenny Mac2 / Hindsight Paul & Val Shilling 2008 Mast
4 KNUBBEL Germany
5 Miss behaving Again Croatia? Pinocchio
6 Prime Evil South Coast UK?
7 Raging Bull Dublin?
8 Sea Dreamer Northern Ireland Unusual in having teak decks
9 Sigmagic Clyde
10 Sunrise Clyde
11 Thalia Denmark?
12 Triptych Dartmouth Keep Smiling
14 ? Japan


Dublin - for sale
KNUBBEL- for sale
Japan - for sale


Sigma 400 - Boatshed
Dream Machine



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If you know where they are now or have more details about the rest let us know. Thanks

email: sigma400owners@gmail.com

Other Sigma

Sigma 33
Sigma 38