I think you misunderstand what a secondary market and a derivative is. They're orthogonal concepts.
A secondary market is any market where securities are traded not with the company, but with a third party. The big stock exchanges (NYSE, Nasdaq) are primarily secondary markets (only IPOs are primary, and even then, the primary transaction is to underwriters who then resell the stock as a secondary to other investors in the IPO).
A derivative is whether you're selling a real share, or something else based on that share. A derivative can be both primary or secondary. Employee stock options are derivatives, and what Equidate trades is also a derivative. If you sell your stock directly to a buyer in a secondary transaction, then it's not a derivative, and the company usually has the right to intercept the transaction (the right of first refusal).
A secondary market is any market where securities are traded not with the company, but with a third party. The big stock exchanges (NYSE, Nasdaq) are primarily secondary markets (only IPOs are primary, and even then, the primary transaction is to underwriters who then resell the stock as a secondary to other investors in the IPO).
A derivative is whether you're selling a real share, or something else based on that share. A derivative can be both primary or secondary. Employee stock options are derivatives, and what Equidate trades is also a derivative. If you sell your stock directly to a buyer in a secondary transaction, then it's not a derivative, and the company usually has the right to intercept the transaction (the right of first refusal).