Tuesday, October 27, 2026

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How to Read a 10-K Like a Short Seller

A four-layer 10-K framework tests revenue timing, receivables, reserves and depreciation against cash flow, using Hertz’s 2012-14 accounting as a case study.

From X

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Fajasy on X

My bear, base, and bull cases value Boost Run’s $BRUN stock on year-end 2026 ARR (on the same basis as the multiples of CoreWeave $CRWV, Nebius $NBIS, and $IREN), which $BRUN will report with its Q4 results in March 2027. None of the three cases adds the $160.7M/year from the July order and Cohere, since both start in 2027. The peers’ contracts that start after 2026 aren’t in their year-end ARR either, so they’re priced into the multiples instead. Since the peers’ multiples leave out the debt they’ll take on to reach year-end ARR, I hold $BRUN’s net debt at today’s $244.3M, rather than adding the lease debt from its H2 2026 build. Each case’s value is year-end ARR times the multiple, minus the $244.3M of net debt, divided by the 88.8M fully diluted shares plus any new shares from a stock sale. I start with the $231.4M of ARR from contracts already running, then add (1) the June order’s $69.2M/year if it starts by December 31 and (2) however much of the $99.4M from contracts without disclosed terms is running by then. Bear case ($4.76, -46%) The bear case assumes $BRUN has no new financing to show by its Q3 report, lessors fund 70% of the H2 2026 build instead of 79.5% (below the 72.0% lessors funded in 2025), and the June order’s November 30 start slips into 2027, so 2026 GPU spending stays at the $1.0B low end of management’s range. That implies year-end ARR of $280M, 30% short of the target, a $62.2M stock sale at $8.89/share (7.0M new shares) to cover the funding gap and three months of 2027 payments, and today’s 2.5x, for a value of $4.76/share. I give the bear case about a 20% chance. Base case ($16.17, +82%) The base case assumes $BRUN lands new lease or asset-backed financing by year-end, starts the June order on November 30, and reaches its $400M target without selling stock. That implies $400M of year-end ARR at CoreWeave’s 4.2x, the median of the three peers, for a value of $16.17/share. I use today’s median, since the base case only solves $BRUN’s own financing problem. It assumes no relief on rates or borrowing costs, which would lift the peers’ multiples too. Bull case ($19.78, +122%) The bull case assumes everything in the base case, plus relief on rates and borrowing costs that lifts the peers’ multiples. That implies $400M of year-end ARR at 5.0x, still below Nebius’s 5.9x, for a value of $19.78/share. So the bull case is really a bet on the market, not on anything more from $BRUN. From $8.89/share, you’re risking a $4.13 loss (-46%) in the unlikely bear case for a $10.89 gain (+122%) in the more likely bull case. P.S. These cases use the October 16 close and predate $BRUN’s October 26 release, which says it has closed more than $600M of non-dilutive project financing in 2026.
@StableBread 1 click

Fajasy on X

Boost Run $BRUN said on October 26 that it has closed "more than $600 million in non-dilutive project financing" so far in 2026. In my October 19 update, I said the stock depends less on demand than on whether $BRUN can finance the next ~$1B of GPUs without selling shares at beaten-down prices. The release also says: → $BRUN has established "a fully funded runway to accelerate customer deployments through the fourth quarter of 2026," with additional financing "proceeding as planned." → $BRUN delivered the first phase of a multi-phase project to "a leading AI research and product company," which matches its $471.7M May 2026 contract with Thinking Machines Lab (Mira Murati's AI startup). → Several more projects are "nearing hand-off in the coming weeks." → Founder and CEO Andrew Karos: "Customer payments exceed our debt payments every month." The $600M+ is YTD, and lessors funded $268.3M of new GPU leases in H1 2026 alone. So if those leases count toward the $600M+, $BRUN has closed more than $331.7M since June 30, about half to almost two-thirds of the $527-686M of new leases I estimated its H2 2026 build needs. The release doesn't say what the financing costs or how much of it closed since June 30. However, the Q3 10-Q, expected in mid-November, should disclose how much $BRUN leased in Q3 and at what rate. If the 10-Q confirms the $600M+, I'd drop the $62.2M stock sale from my bear case, and the question shifts from whether $BRUN can fund its build to what the new debt costs.

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