Amphenol grew second-quarter 2026 sales 55% to $8.76 billion — 30% organically on AI datacenter demand, the rest from the CommScope acquisition — and lifted operating margin 4.4 points to 29.5% despite the acquired business diluting it.
Overview
Amphenol's second quarter of 2026 — the three months ended June 30, 2026, reported in the 10-Q filed July 31 — produced net sales of $8,758.1 million, up 55% from $5,650.3 million a year earlier, and GAAP diluted earnings per share of $1.37 versus $0.86. Two distinct things drove that: the January 9, 2026 purchase of CommScope's connectivity and cable business, which alone accounted for about 14% of consolidated sales in the quarter, and unusually strong demand from data-center customers. Amphenol makes connectors, cable and antennas — the physical parts that move electrical and optical signals between chips, boards, racks and buildings — and AI server buildouts consume far more of that content per system than conventional computing does.
Stripping out both currency moves and acquired businesses gives what the company calls organic net sales growth: the growth of the business Amphenol already owned, measured on a like-for-like basis. That was 30% in the quarter. Acquisitions added 24 percentage points, and a weaker US dollar added roughly 1 point (about $46.5 million of sales).
Operating margin is the share of revenue left after the cost of making and selling the product, before interest and tax. Book-to-bill is orders received divided by sales recognised in the same period: at 1.23:1, Amphenol took in $1.23 of new orders for every dollar it shipped, so backlog grew. That ratio is the single most forward-looking number in the release, and it is well above the 1.0 that would signal demand merely keeping pace with shipments.
Half-year figures: net sales of $16,378.2 million versus $10,461.3 million (+57% reported, +32% organic), operating income of $4,416.4 million (27.0% of sales) versus $2,443.6 million (23.4%), and GAAP diluted EPS of $2.10 versus $1.44. Adjusted diluted EPS for the six months was $2.42 versus $1.44.
Acquired growth versus organic growth
The split matters because the two have very different economics. Acquired revenue came with debt and with lower margins; organic revenue came with operating leverage.
Segment
Q2 2026 net sales
Reported growth
Organic
From acquisitions
Segment op margin 2026
2025
Communications Solutions
$5,383.6m
+85%
+42%
+42 pts
33.6%
30.6%
Harsh Environment Solutions
$1,856.8m
+28%
+22%
+6 pts
30.1%
25.2%
Interconnect and Sensor Systems
$1,517.7m
+17%
+13%
+3 pts
21.0%
19.5%
Consolidated
$8,758.1m
+55%
+30%
+24 pts
29.5% (GAAP)
25.1%
(Segment operating margins are measured before corporate costs such as stock-based compensation and acquisition-related expenses, so they do not sum to the consolidated GAAP figure.)
Communications Solutions is where CommScope landed, and it is now about 62% of company sales. The MD&A attributes the segment's rise to "outsized organic growth in the IT datacom market, with particular strength in artificial intelligence ('AI')-related applications, as well as strong organic growth in the industrial, mobile devices and automotive markets." Note that the 42-point acquisition contribution and the 42% organic growth are almost exactly equal — CommScope roughly doubled the segment's revenue base, and the pre-existing business roughly grew by half again on its own.
Harsh Environment Solutions (ruggedised connectors for defence, aerospace, industrial) grew 22% organically on defence, industrial, commercial aerospace and IT datacom demand, with about 6 points from the 2025 Trexon acquisition and others. Interconnect and Sensor Systems was the slowest at 13% organic, and its growth too was attributed mainly to IT datacom and AI applications — meaning the automotive and sensor businesses inside it are not the engine right now.
Geographically, US sales rose 76% to $3,413.8 million but only 23% organically: 52 percentage points came from acquisitions, reflecting CommScope's US weighting. Foreign sales rose 44% to $5,344.3 million, of which 33 points were organic. The underlying organic demand is therefore more international than the headline US growth rate suggests.
CommScope's own contribution is disclosed directly: from January 9 through June 30, it added $2,100.9 million of net sales and $190.2 million of net income — the latter after $179.0 million ($137.1 million after tax) of non-cash charges for acquired backlog and inventory written up to fair value at closing, and before allocating any of the interest expense used to fund it. Amphenol paid roughly $10,684.0 million, net of cash, for its three 2026 acquisitions combined.
Margins: operating leverage, plus an $80 million tariff refund
Operating margin expanded 4.4 points to 29.5%. Management's stated cause is "strong operating performance and disciplined cost control, which generated strong operating leverage on the significant growth experienced during the period" — in plain terms, sales grew much faster than the fixed portion of costs. That shows in the expense lines: selling, general and administrative costs rose 51% ($622.5m to $939.9m) while sales rose 55%, so SG&A fell from 11.0% to 10.7% of sales.
Two adjustments to that read:
An $80.0 million one-off helped. Operating income includes "a net benefit of $80.0 related to the recovery of International Emergency Economic Powers Act ('IEEPA') tariffs" — a refund of import duties Amphenol had previously paid. That is worth $0.04 per share and roughly 0.9 points of margin, and it will not repeat; the company explicitly excludes further tariff recoveries from its Q3 guidance.
Acquisitions pulled margin down, not up. The filing says the newly acquired businesses "currently have higher Operating expenses as a percentage of net sales compared to the Company average" and operate "below the average operating margin of the Company." So the 4.4-point expansion was achieved despite dilution from CommScope, which means the organic business's incremental margins were better than the headline implies.
Gross margin of 40.5% versus 36.3% is cleaner than it first appears: the $132.0 million of acquisition-related inventory step-up amortisation from CommScope (a non-cash charge that runs through cost of sales when acquired inventory is sold) was all recorded in the first quarter, and the second quarter carried none, while Q2 2025 carried $16.9 million from the Andrew deal.
Takeaway: The acquisition is doing the work on revenue scale, but the margin story is organic — Amphenol expanded operating margin by 4.4 points while absorbing a large, structurally lower-margin acquisition, and the 1.23:1 book-to-bill says the AI-driven demand behind that leverage has not yet peaked.
Tax: a China assessment distorts the year-to-date figures
The quarter's effective tax rate — tax as a share of pre-tax profit — was 25.3%, against 18.3% a year earlier. The six-month rate is far uglier at 32.4% versus 20.2%, and that gap is almost entirely a prior-years dispute rather than current operations. Chinese tax authorities issued unfavourable determinations on Amphenol's prior-period positions, producing tax payment notices totalling $230.0 million (accrued $100.0 million in Q4 2025 and $130.0 million in Q1 2026, and paid in full during Q2 2026). Amphenol separately reassessed its tax rate assumptions on other prior-year Chinese results and booked a further $160.0 million in Q1. A further $39.0 million was accrued in Q2 for "reserves for potential settlement of various foreign tax matters."
The forward-looking consequence is that Amphenol raised its adjusted effective tax rate to 27.0%, from 24.5% a year ago, citing the China matter "as well as a continued shift in income to higher-tax jurisdictions." That 2.5-point step-up is permanent margin at the net income line, not a one-off.
One oddity worth flagging: GAAP EPS of $1.37 is higher than adjusted EPS of $1.35 this quarter — the reverse of the usual pattern. The reason is $80.5 million of excess tax benefits from employee stock option exercises (worth about $0.06), which Amphenol excludes from adjusted results; that flatters GAAP earnings and is a function of the share price, not of operations.
Balance sheet and cash
Funding the deal changed the balance sheet materially. Long-term debt stood at $17,177.0 million at June 30, against $14,564.8 million at the end of 2025, while cash and short-term investments fell to $5,419.1 million from $11,434.2 million — the November 2025 note proceeds having been spent on CommScope in January. Quarterly interest expense more than doubled to $213.7 million from $80.9 million, an annualised drag of roughly $530 million more than the prior-year run rate. Amphenol has begun paying the bridge financing down: it repaid $300.0 million on July 2 and $234.1 million on July 27 against the 364-day delayed draw term loan, leaving $400.0 million of it outstanding as of the filing date.
First-half operating cash flow was $2,678.7 million (from $2,181.7 million) and free cash flow $2,036.7 million (from $1,701.7 million) after $647.1 million of capital spending. Cash conversion lagged the 48% rise in net income because working capital absorbed $1,176.4 million, led by a $1,310.7 million increase in receivables; days sales outstanding rose to 69 from 66. That is the normal cost of growing shipments this fast, but it is worth watching — if receivable days keep climbing while sales decelerate, cash flow gets squeezed from both directions.
Capital returns continued at a steady rather than aggressive pace: $208 million of buybacks (1.5 million shares) and $307 million of dividends in the quarter, $515 million combined, against $2.0 billion of half-year free cash flow. The priority is clearly deleveraging.
Outlook
Management guided the third quarter of 2026 to sales of $9.3–9.4 billion (up 50–52% year over year) and adjusted diluted EPS of $1.40–1.42 (up 51–53%), assuming current market conditions and constant exchange rates, and explicitly excluding any further tariff recoveries. Amphenol also raised its expectation for CommScope's contribution: full-year sales of $4.6 billion and $0.30 of adjusted EPS accretion, up from prior guidance of $4.1 billion and $0.15 — a meaningful upward revision only six months after closing, and one that says the acquired business is running ahead of the deal model rather than merely integrating on plan.
Two further deals closed in the quarter: El.Com of Leno, Italy (roughly $150 million of annual sales; high-voltage cable assemblies for industrial, defence and aerospace, into Interconnect and Sensor Systems) and Wilder Technologies of Vancouver, Washington (roughly $15 million of sales; high-speed test and measurement, into Communications Solutions). Neither moves the numbers; both fit the pattern of buying adjacent technology rather than scale.
Our read on trajectory. The guided sequential step from $8.76 billion to about $9.35 billion implies roughly 7% growth quarter over quarter with no new acquisitions of consequence in the number, so the AI datacom demand is still building, not flattening. Three things temper the picture. First, the quarter benefited from $80 million of tariff recovery that will not recur, so the underlying Q2 adjusted margin was closer to 28.9%; guidance implicitly assumes the operating leverage holds without it. Second, the adjusted tax rate is now 27.0% rather than 24.5%, which permanently costs roughly 3% of net income relative to last year's basis. Third, the growth is increasingly concentrated: every segment's commentary points back to IT datacom and AI, and while the industrial, defence and commercial aerospace markets were described as strong, mobile networks and automotive were conspicuously absent from the second-quarter drivers list in two of three segments. Amphenol's historical defence has been end-market diversification; right now, that diversification is contributing much less than one end market is.
The concrete number to watch next quarter is book-to-bill. A 1.23:1 ratio on $8.8 billion of sales means backlog built by roughly $1.9 billion in three months. If that ratio holds near or above 1.1 in the third quarter, the current growth rate has runway into 2027. If it falls through 1.0, it will be the first sign that AI-related orders were pulled forward rather than sustained — and it will show up in orders well before it shows up in revenue.
Source: Amphenol Corporation Form 10-Q for the quarterly period ended June 30, 2026 (filed July 31, 2026, accession 0001104659-26-089194) and the Q2 2026 earnings release furnished on Form 8-K dated July 29, 2026 (Exhibit 99.1). All dollar figures in millions unless stated otherwise. This is analysis of a public filing, not investment advice.