Mercury Systems Closes Fiscal 2026 on Tuesday, and Consensus Already Assumes the Quarter Got Spent Early

by Priya Raghunathan · August 16, 2026

Mid-Cap Companies Reporter, The SmallCap Signal

Mercury Systems reports fourth-quarter and full-year fiscal 2026 results after the close on Tuesday, August 18, with a conference call at 5:00 p.m. Eastern, according to the scheduling notice the company issued on July 28. It is the closing quarter of a fiscal year that ends in late June, which makes it the report where a company normally sets the frame for the year ahead. At Mercury, the more immediate question is narrower and more awkward: how much of the June quarter is left after management moved a piece of it forward.

The stock closed Friday, August 14 at $111.12, up $1.33 or 1.21% on the day, according to StockAnalysis.com's quote page, which stamps the price "At close: Aug 14, 2026, 4:00 PM EDT." The same page lists a market capitalization of $6.67 billion on 60.04 million shares outstanding — the two reconcile — and a 52-week range of $62.78 to $128.45. US equity markets have not traded since that bell, so no price in this article reflects anything later than Friday's close.

On the consensus, the figure most calendars are carrying is roughly 38 cents. Zacks, via its earnings-preview note published August 11, puts the consensus estimate for the quarter ended June 2026 at $0.38 per share on revenue of $264.88 million. MarketBeat's alert of the same date lists $0.3850 per share and $266.164 million, and shows the same Tuesday, August 18 after-the-close date and 5:00 p.m. Eastern call. The two providers are within a rounding error of each other, and both describe forward analyst numbers rather than a company forecast.

The basis matters more than usual here, because Mercury's GAAP and non-GAAP results diverge by a wide margin, and a reader who takes 38 cents as a GAAP expectation would badly misread the quarter. Neither the Zacks note nor the MarketBeat alert states which basis it is using, so the inference has to come from the arithmetic — and the arithmetic is unambiguous. Zacks describes its $0.38 as a 19.2% year-over-year decline and its $264.88 million as a 3% decline; the year-ago fourth quarter of fiscal 2025 produced adjusted earnings per share of $0.47 and net revenues of $273.1 million, and those are the figures the percentages line up against. GAAP diluted earnings per share in that year-ago quarter was $0.27, against which 38 cents would be an increase of roughly 40%, not a decline. Separately, StockAnalysis.com's forecast page for Mercury states outright that "EPS and Forward PE are based on non-GAAP adjusted numbers"; it shows nine analysts and a fiscal 2026 adjusted earnings consensus of $1.08 on revenue of $960.35 million. That site's fiscal 2027 estimates sit behind its paywall and are not reproduced here.

The gap those adjustments cover is not cosmetic. For all of fiscal 2025, Mercury reported adjusted earnings per share of $0.64 and GAAP diluted earnings per share of a loss of $0.65 — a spread of roughly $1.29 on the same twelve months. In fiscal 2026 the pattern has continued at the quarterly level: the company reported GAAP diluted losses of $0.21, $0.26 and $0.04 in the first three quarters while reporting positive adjusted earnings of $0.26, $0.16 and $0.27 in the same three.

Not every provider agrees on the number, either. A MarketBeat-syndicated note dated July 9 reported that Zacks Research had cut its own fourth-quarter figure to $0.20 per share from $0.21 in a July 7 report, and cited a full-year consensus of $0.30 per share. Neither of those figures is reconcilable with a fiscal 2026 adjusted consensus near $1.08 against $0.68 of adjusted earnings already booked through three quarters, and the note does not state which basis it is using. The dispersion is worth flagging rather than resolving: a reader comparing Tuesday's headline print against a calendar entry should check what that calendar is measuring.

The reason the fourth-quarter consensus embeds a year-over-year decline at a company whose backlog is at a record traces directly to something management said in May. On the third-quarter call, chairman and chief executive Bill Ballhaus told analysts, according to the transcript published by The Motley Fool, that "we accelerated progress across a number of programs and generated approximately $25 million of revenue, $15 million of adjusted EBITDA, and $25 million of cash, all primarily planned for the fourth quarter." That is a substantial share of a quarter that produced $36.1 million of adjusted EBITDA in total. The qualifier in that sentence is load-bearing: management said primarily planned for the fourth quarter, not entirely.

Chief financial officer David Farnsworth was then asked directly about the arithmetic. RBC's Ken Herbert noted on the same call that Mercury typically enjoys a seasonal step-up into the fourth quarter and that the revised full-year framing implied more modest margin expansion this time. Farnsworth's answer, per the transcript, was that the company had seen those step-ups in the past but that they accompanied a significant change in the linearity of the business, that one of the things Mercury has managed to do this year is flatten that linearity somewhat, and that it does not expect to see that rate of jump in the fourth quarter — more of a gradual trend.

What the company itself put on the record in May was directional rather than numeric. On the same call, per the transcript, Ballhaus said that "we now expect annual revenue growth for FY 2026 approaching mid-single digits, up from low single digits. We expect full-year adjusted EBITDA margin of mid-teens, up from approaching mid-teens." Both were upgrades from the prior framing. Neither is a guidance range, and Mercury's quarterly releases through fiscal 2026 have not carried one.

The revenue line has been the cleanest part of the turnaround. Mercury reported $225.2 million in the first quarter ended September 26, 2025, up 10.2% year over year; $232.9 million in the second quarter ended December 26, 2025, up 4.4%; and $235.8 million in the third quarter ended March 27, 2026, up 11.5% from $211.4 million. Nine-month revenue was $693.8 million. For reference, all of fiscal 2025 came to $912.0 million.

Demand has been the loudest signal. Bookings rose from $250.2 million in the first quarter, a 1.11 book-to-bill, to $288 million in the second, a 1.23, to a record $348 million in the third — which the release describes as up 73.7% year over year, for a 1.48 book-to-bill. In the third-quarter release filed with the Securities and Exchange Commission, Ballhaus said that "in the third quarter we delivered record bookings of $348 million, with a 1.48 book-to-bill, resulting in a record backlog of approximately $1.6 billion." The same release puts that backlog at approximately $1.6 billion as of March 27, 2026, an approximate $240 million increase from a year ago and up 17.9% year over year, against $1.40 billion at the close of fiscal 2025. Twelve-month forward backlog stood at $891 million.

Margins are where the year still looks unfinished. Mercury does not print a gross margin percentage in its earnings releases, so the figures that follow are this publication's own calculations from the reported net revenues and cost-of-revenues lines: 27.9% in the first quarter, 26.0% in the second and 29.3% in the third, against 31.0% in the fourth quarter of fiscal 2025. Adjusted EBITDA margin, which the company does print, followed a similar shape at 15.8%, 12.9% and 15.3%, against 18.8% in the year-ago June quarter. Nine-month adjusted EBITDA of $101.7 million on $693.8 million of revenue is likewise the sum of the three reported quarters rather than a headline figure. Farnsworth told analysts in May that the company expects average backlog margin to continue to increase as it converts lower-margin backlog and brings in new bookings that it believes will be in line with its targeted margin profile — a mix effect that plays out over quarters, not in a single print.

Cash conversion is the item that has quietly deteriorated, and it is the one worth watching hardest on Tuesday. Mercury reported free cash flow of $39.5 million for the first nine months of fiscal 2026 on $60.2 million of operating cash flow. In fiscal 2025 the company reported $119.0 million of free cash flow for the full year and $34.0 million of that in the fourth quarter alone; subtracting the one from the other leaves roughly $85 million generated across the first nine months of that year, a figure Mercury did not report as such. Third-quarter fiscal 2026 free cash flow was negative $1.8 million, against positive $24.1 million a year earlier, and on the May call the sequential inventory increase of approximately $12 million was attributed primarily to work in process. Ballhaus said on that call that the company expects free cash flow to be positive in the fourth quarter, without sizing it.

On the fiscal-year-end mechanics, one widely repeated assumption deserves correction. It is often said that the June-quarter report is where the next year's guidance lands, and at most companies it is. Mercury's own fourth-quarter and fiscal 2025 release, issued in August 2025, contained no fiscal 2026 financial guidance, and none of the three fiscal 2026 quarterly releases carried a numeric outlook either. Those four releases are the full basis for that statement; it is not a claim about every disclosure the company has ever made. Absent a change in practice, the forward-looking content on Tuesday is more likely to arrive as directional commentary on the call than as a guidance table in the release. The standing reference point management has given is a longer-run target profile that Ballhaus described in May as above-market top-line growth, adjusted EBITDA margins in the low- to mid-20% range, and free cash flow conversion of 50% — a destination, without a stated date.

Management has also been explicit that the loudest parts of the defense-spending story are not in its numbers. Ballhaus told analysts in May that Mercury sees potential incremental tailwinds in the market that its bookings mix does not meaningfully capture, but said those tailwinds "are not reflected in our bookings or outlook today, and we view them as additive to the target profile we have discussed." Investors treating budget headlines as already embedded in the backlog are, on the company's own account, double-counting.

Two pieces of news have landed since the May report. On August 3 Mercury announced a strategic agreement with Palantir to apply Palantir Foundry to material planning and factory operations, building an enterprise ontology intended to serve as a digital twin of Mercury's operations and business practices. No dollar value or financial terms were disclosed. Ballhaus said in the announcement that "partnering with Palantir will enable Mercury to further drive automation and efficiency in our supply chain and manufacturing operations, which are key to accelerating delivery of critical, high-demand capabilities for the warfighter." On May 28 the company announced a multi-year contract to deliver 1,000 BuiltSECURE rugged servers built on its common processing architecture through the defense distributor Blue Raven, which it described as its largest single order for those systems; no dollar value was disclosed there either. The Palantir arrangement is a cost-and-execution lever rather than a revenue event, and its effect, if any, would show up in the margin and working-capital lines over time rather than in Tuesday's print.

That leaves a short list of genuinely unresolved questions going in: whether the roughly $25 million of revenue and $15 million of adjusted EBITDA management moved into the third quarter leaves the fourth short of the $265 million and 38 cents on the consensus screens; whether full-year revenue growth lands at the "approaching mid-single digits" and adjusted EBITDA margin at the "mid-teens" that Ballhaus described in May; whether fourth-quarter free cash flow is not merely positive but large enough to keep the fiscal year within reach of the $119.0 million Mercury generated in fiscal 2025; and whether the company says anything quantitative about fiscal 2027 when its recent practice has been not to. The risks cut both ways and are the ordinary ones for a defense supplier mid-turnaround — program timing, backlog margin mix, material availability and the pace at which unbilled balances convert to cash — and none of them resolve on a single quarterly print. This article is a description of the setup and the published record, not a recommendation.