Divestopedia explains Add-On Acquisition

Similar to a bolt-on or tuck-in, an add-on acquisition can refer to acquisitions of smaller companies with very little financial and administrative infrastructure. Given the lack of infrastructure, acquirers will usually pay lower end valuation multiples for add-on acquisitions.

Unlike a bolt-on or a tuck-in, an add-on acquisition can also refer to the acquisition of a larger company that provides diversification to an existing business. The add-on business could have strong infrastructure and management teams, and in some instances might be seen as a synergistic purchase by an acquirer. In this case, an add-on acquisition could fetch a premium valuation in the marketplace.

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Note added at 2 heures (2014-10-24 07:26:40 GMT)
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Désolé Thomas, votre lien fonctionne bien mais j'ai foncé tête baissée sans le voir.

J'ai trouvé ceci:

"In addition, American Capital has financed three *add-on acquisitions* across the companies that now comprise Mirion Technologies. mirion.com"

"Par ailleurs, American Capital a financé *l'acquisition supplémentaire* des trois entreprises qui composent aujourd'hui Mirion Technologies."