The relationship between the semantic function of noun phrases and the way(s) in which they are realized morphosyntactically in a clause has been a topic of intensive research in the typological literature as well as for theories concerned with the syntax–semantics interface. Considering just noun phrases that function as direct objects, it has been shown for language after language that that there is a systematic relationship between the semantic function of an object (e.g. whether it is pronominal, definite, indefinite, etc.) and its morphosyntax (e.g. whether it requires special case marking, whether it triggers agreement, whether it exhibits special distribution in terms of word order, etc.). This paper aims to contribute to the already large body of evidence documenting the relationships between form and semantic function by providing a comprehensive survey of the morphosyntax of transitive constructions in Tagalog, focussing, specifically, on the relationship between the semantic function of the theme argument and the morphosyntactic strategies by which theme arguments are realized. Contrary to what previous studies have claimed, I show that specific noun phrases are attested as direct objects of active clause in Tagalog. An exception to this is pronoun and proper name themes, which must either be oblique marked to function as a direct object or be realized as a subject. Developing and expanding upon analyses in Rackowski (2002), I propose that the differential behavior of specific themes (pronoun/proper names on the one hand versus non-pronoun/proper name specific themes on the other) follows from a clausal architecture in which there are at least two VP-external positions to which specific themes must raise – a relatively high position for pronoun and proper name themes, and a position intermediate between vP and VP for all other specific themes. The distribution of syntactic positions available for the theme argument is claimed to follow from a proposal in Merchant (2006), pre-figured in Jelinek & Carnie (2003) and related work, that relational hierarchies of the type familiar from typological research – in particular, the definiteness hierarchy – are directly encoded in the phrase structure.