Since this is a apparently a Brazilian limitada, I'd simply refer to them as quotas.
"The capital is divided into quotas representing the amount in money,
credits, rights or assets the quota‐holder contributed when forming the
company. Quotas are not represented by securities or certificates and the
company will record the ownership and number of quotas in the Articles
of Association. The quota‐holders liability is limited to the value of their
quotas; however, until the company capital is fully paid‐up, it will extend
to the value of the company’s entire capital."
If 'quota' is unappealing, you could avoid the issue completely and say "assigned his corporate interest to ... "
Note added at 1 day1 hr (2010-12-31 13:34:11 GMT) Post-grading
SÃO PAULO CHAMBER OF COMMERCE
The liability of partners both in limited liability companies and join-stock companies is restricted to the amount which they paid for their quotas or shares, as the case may be…
The liability of each partner is limited to the amount of its quotas, but all partners are jointly and severally liable for the total amount of the corporate capital until it is fully paid up…
The corporate capital of a liability company is divided into quotas, allocated to its partners in any proportion….. The articles of association must therefore be amended whenever quotas are assigned or transferred, or upon capital increase, so as to accurately reflect the ownership of a limited liability compnany's capital.
PINHEIRO NETO - ADVOGADOS:
"Holdings in a limitada are reflected in the company's articles of association, since the quotas
representing the division of capital are not represented by certificates as in the case of shares. The
articles must therefore be amended whenever quotas are assigned, transferred, or increased, so as
to accurately reflect the ownership of the company's capital.
THE SOCIEDADE LIMITADA
The Sociedade Limitada (commonly referred to as a Limitada and translated as a limited liability
company) …. Formation … A Limitada needs at least two partners, also known as quotaholders, whether or not Brazilian resident individuals or legal entities. ….The articles of association and any amendments thereto may be drafted to suit the purposes of the Limitada, but must be written in Portuguese and set out: … Other provisions may be included if the partners so desire, such as: (i) regulations on the transfer of quotas, (ii) fiscal board, …
Demarest e Almeida:
Demarest advised ISS Servisystem do Brasil Ltda., a company of ISS Group, to acquire all quotas of Loghis Logística Integrada Ltda., one of the leading companies in this market and market reference in the development of new solutions to its clients… Demarest advised Liquidez Distribuidora de Títulos e Valores Mobiliários in the sale of its quotas in BGC Partners, one of the world's largest broker.
http://www.demarest.com.br/media/15787401/formatação - grupo...
"The article below is intended to compare limited liability companies in Argentina and in Brazil and clarify the main differences between such form of association in both countries.
Regulations: In Brazil, limited liability companies(sociedades por quotas de responsabilidade limitada) are governed by Decree No. 3,708 of January 10, and supplemented by the Brazilian Commercial Code and by Law No. 6,404, of December 15, 1974 (the 'Corporation Law').
Quotaholders: The company is incorporated through a private instrument or public deed, but its capital may not be open to public subscription. The company must have at least two quotaholders in order to be incorporated and such quotaholders may be either Brazilian or foreign individuals or legal entities.
Capital: The company's capital is divided into quotas of same value.