**Table 4:** Neptunian hosts and their metal content. We also list the mass (in earth masses) of the least massive planet orbiting the star, as well as an indication of whether there is one or more jovian companions.
Star	[Fe/H]	jov.?	$M_{\rm p}\sin i$	[Fe/H] reference
Gl 581	-0.33	no	5.09	Bean et al. (2006)
	-0.25			Bonfils et al. (2005b)
	-0.29			Mean value
Gl 876	-0.12	yes	5.72	Bean et al. (2006)
	-0.03			Bonfils et al. (2005b)
	-0.08			Mean value
HD69830	-0.06	no	10.49	This work
HD160691	0.30	yes	13.99	This work
Gl 674	-0.28	no	11.76	Bonfils et al. (2007)
55 Cnc e	0.33	yes	10.81	Santos et al. (2004b)
HD4308	-0.34	no	14.94	This work
HD190360	0.24	yes	18.12	Santos et al. (2004b)
HD219828	0.19	yes	20.98	Melo et al. (2007)
GJ 436	-0.32	no	22.89	Bean et al. (2006)
	0.02			Bonfils et al. (2005b)
	-0.15			Mean value
Gl 176	-0.10	no	24.16	Endl et al. (2007)

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