This study uses qualitative data to explore how employees perceive the relationships between employee share ownership (ESO) scheme participation, their attitudes and behaviours at work, and their feelings of psychological ownership (PO). Wecontribute to two areas of (largely quantitative) research literature. First, we advance understanding of PO by examining participants' explanations of how they feel their sense of PO is affected by participating in a company ESO scheme. Second, we examine the role of PO in employees' explanations of the attitudinal and behavioural changes they feel they have experienced as a consequence of participating in an ESO scheme. To explore the subjective meaning of ESO participation and its PO impact, 37 semi-structured interviews were conducted in nine companies with participants in three tax-advantaged ESO schemes in the United Kingdom: SIP, SAYE, and EMI. Data were coded and analysed using thematic analysis (Braun & Clarke, 2006). Participants perceived little effect of ESO schemes on PO or on the organizational features anticipated to give rise to these feelings. In turn, PO was found to play little or no part in employees' explanations of how share schemes had, or did not have, an attitudinal or behavioural impact.