The common misconception that has taken root presently is that only entities and organizations which are substantially aided or funded by the Government are covered under the RTI Act.
But the fact is that Private Entities are covered under the RTI Act irrespective of whether they are substantially aided or funded by the Government.
1) Private Entities are not covered under sec 2(a) of the Act:
Sec 2(a) "appropriate Government" means in relation to a public authority which is established, constituted, owned, controlled or substantially financed by funds provided directly or indirectly—
(i) by the Central Government or the Union territory administration, the Central Government;
(ii) by the State Government, the State Government;
But Private Entities are covered under section 2(f) of the Act:
Sec. 2(f) "information" means any material in any form, including records, documents, memos, e-mails, opinions, advices, press releases, circulars, orders, logbooks, contracts, reports, papers, samples, models, data material held in any electronic form and information relating to any private body which can be accessed by a public authority under any other law for the time being in force;
Also section 8 (j) is relevant here:
Section 8 (j): Provided that the information which cannot be denied to the Parliament or a State Legislature shall not be denied to any person.
To Summarize the argument / point of view:
1) Private Entities are not covered under sec. 2 (a) of the act.
2) Private Entities are covered under sec. 2 (f) of the act.
3) With reference to sec 8 (j) of the act one can resonably infer and conclude: Provided that the information which cannot be denied to the Public Authority with which the Private Entity is registered shall not be denied to any person.
Hence Private Entities are covered under the RTI Act through the Public Authority with which they are registered e.g. For Co-operative Society : Deputy Registrar of Co-op. Sty's, for Banks - RBI etc, you will need to find out with which Public Authority the Private Entity has registered themselves.
Please file your RTI applications to the Public Authorities, who in turn should forward your application/ queries to the concerned Private Entity and get the information for you.
This virtually brings every one under the ambit of RTI Act.