An automaker that co-owns its battery-cell factory faces a question most readers never think to ask: where does that joint venture actually appear in the financial statements? The answer is in two separate places, and missing either one means misreading how much the venture matters. GM's filings are a clear teaching case.
In its Form 10-K for the year ended December 31, 2023, filed January 30, 2024, GM describes Ultium Cells as "integral to the operations of our business by providing battery cells for our EVs," and notes "equity earnings related to Ultium Cells Holdings LLC." Its 2024 quarterly filings repeat that the entity supplies battery cells and report equity earnings from it. The 10-K is on sec.gov, surfaced through the EdgarBeast index.
Place one is operational. The cells the JV produces are inputs to GM's vehicles, so their cost flows into cost of sales when those vehicles are built and sold. In that sense the JV behaves like a supplier embedded in the manufacturing cost of every EV — "integral to the operations," as the filing puts it. This is the part most readers intuitively grasp.
Place two is ownership, and it is where the equity method comes in. Because GM co-owns the venture rather than fully controlling it, the JV is not consolidated line-by-line into GM's revenue and expenses. Instead, GM's share of the venture's own net result appears as a single line — "equity earnings" (or losses). When the filing reports equity earnings tied to Ultium Cells, that is GM's slice of the JV's profitability surfacing in the parent's numbers.
Why does the distinction matter? Because the two lines move for different reasons. Cost of sales reflects how many cells GM consumes building cars. Equity earnings reflect how profitable the cell venture itself is — capacity utilization, yields, and any production incentives the venture captures. A reader who only watches one line will misjudge how the battery business is contributing.
So the discipline is to read a co-owned cell plant in both registers at once: as a cost embedded in every EV, and as a separately disclosed equity stake whose own earnings rise and fall. GM's filings lay both out — "integral to operations" on one hand, "equity earnings" on the other. Together they show how a battery joint venture really lands in an automaker's financial statements.