Will CoStar's cash and investments fall below $1B by end of FY2026?

Starting from $2.0B cash at Q3 2025. Annual cash uses: ~$385M remaining buyback, ~$500M+ Homes.com investment, normal capex. Annual cash generation: ~$415-425M EBITDA, plus ~$100M net interest income. Net cash use is roughly ($385M + $500M) - ($425M + $100M) = -$360M per year from operations. Over 4-5 quarters to FY2026 end, that's roughly $450M in net cash consumption, bringing cash to ~$1.55B. To fall below $1B requires either (a) another large acquisition, or (b) significantly higher investment than projected. Another acquisition is the main risk factor, but the Capital Allocation Committee establishment suggests some governance guardrail.

Cash trajectory analysis: $2.0B at Q3'25 → if buyback runs $100M/quarter and Homes.com costs $125M/quarter, that's $225M outflow. EBITDA + interest inflow is about $130M/quarter. Net burn ~$95M/quarter × 5 remaining quarters = $475M, leaving ~$1.5B by FY2026 end. The buyback may not continue at that pace (only $115M of $500M used in first 3 quarters), and EBITDA is growing. To breach $1B, CoStar would need to spend another $500M+ on M&A. While management has acquisition DNA, the Domain deal just closed and management attention is focused on integration. A large deal in 2026 is possible but improbable.

Giving higher probability to the M&A risk scenario. Andy Florance is a serial acquirer — LoopNet, Apartments.com, STR, Matterport, Domain all happened under his watch. CoStar could pursue targets in U.K. commercial, additional residential portals, or prop-tech companies. At $2.0B starting cash, a $600-800M acquisition combined with ongoing investment could push cash toward $1B. The Capital Allocation Committee is chaired by Florance himself, which may not provide genuine independence. Additionally, the Homes.com investment could accelerate if bookings show promise.

Simple math: $2.0B cash, ~$400M annual EBITDA, $100M interest income. Even with $500M buyback and $500M Homes.com investment, the net burn is roughly $500M over FY2026. That puts cash at ~$1.5B. Below $1B requires a specific large transaction that hasn't been signaled. Management is focused on Domain and Matterport integration. Probability is low without a catalyst.

While the base case projects $1.5B, there are scenarios that could push lower: (1) accelerated buyback if stock drops (management buys on weakness), (2) additional tuck-in acquisitions that individually are $200-300M but cumulate, (3) Homes.com investment increase. None of these alone breaches $1B, but in combination they could. Also, the $2.0B starting point is from Q3'25 — Q4'25 results may show further decline. Probability is moderate-low at ~22%.

CoStar has historically been conservative with its balance sheet — it operated debt-free for years and built up $4.7B cash. The $2.0B level post-acquisitions is still substantial. Management established the Capital Allocation Committee specifically to impose discipline. Going below $1B would require a deliberate strategic choice that contradicts the governance signal. Most likely outcome: cash stays in the $1.3-1.7B range through FY2026.

Cash math projects to ~$1.5B. Below $1B requires another large acquisition which isn't signaled. Low probability.

Serial acquirer DNA is the risk factor, but timing argues against another large deal during Domain integration. Tuck-in acquisitions possible but unlikely to total enough to breach $1B. Probability around 18%.

Starting at $2.0B with $1B threshold gives $1B buffer. Operational cash generation partially offsets investment spending. Another large deal is the main breach scenario. Probability is moderate-low at 20%.