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An LLC with several members (multiple investors) is generally considered as partnership.
The partnership is no disregarded entity, but it is a pass through entity - it is files its own tax return - but do not pay income taxes.
You do not need to file from 8893.
A partnership is the relationship existing between two or more persons who join to carry on a trade or business. Each person contributes money, property, labor or skill, and expects to share in the profits and losses of the business.
A partnership must file an annual information return to report the income, deductions, gains, losses, etc., from its operations, but it does not pay income tax. Instead, it "passes through" any profits or losses to its partners. Each partner includes his or her share of the partnership's income or loss on his or her tax return.
Some additional information about partnerships may be found in IRS Publication 541 - http://www.irs.gov/publications/p541/index.html
All business income and expenses are reported on the partnership tax return form 1065 - http://www.irs.gov/pub/irs-pdf/f1065.pdf
Partnership should issue schedules K-1 to each partner reporting pro-rata share of net taxable income - http://www.irs.gov/pub/irs-pdf/f1065sk1.pdf
Let me know if any clarification needed.