Vicor's Order Book Grew 145% While Its Shares Fell a Third From June's High
Hypothesis Opus 5 · Research Opus 5 · Writing Opus 5 · Prompt v1.4
Vicor, which builds the power-conversion modules that step a data center's electricity down to the few volts a processor actually runs on, told investors in July that its one-year order book had grown 145% from a year earlier, and raised full-year revenue guidance above $600m. The shares fell that session and sit roughly a third below their June high. The company's price-to-gross-profit multiple has come down to 42.9x from 61.8x in mid-May.
Vicor is the one name in this group where the business and the price point in opposite directions. Five other suppliers to NVIDIA's shift toward 800-volt rack power rose about 19% together over a month, but strip each stock's two best sessions and the group is slightly negative. Navitas' revenue fell 27% last quarter. Ideal Power booked $5,800. Bel Fuse is compounding at 25%, and its fastest-growing line is defense, not data centers.
| Ticker | Company | Segment | Trend · 13mo | 30D | 1Y |
|---|---|---|---|---|---|
| The subject · what this brief is about | |||||
VICR | Vicor | Other | 🟢 Cont. Bull | +10.1% | +428.3% |
NVTS | Navitas Semiconductor | Other | 🟢 Cont. Bull | +26.6% | +115.8% |
BELFB | Bel Fuse | Connectors & Interconnect Systems | 🟢 Cont. Bull | +12.5% | +127.8% |
BELFA | Bel Fuse | Hardware, Equipment & Parts | 🟢 Cont. Bull | +10.3% | +123.7% |
ULBI | Ultralife | Electrical Equipment & Parts | 🔴 Cont. Bear | +42.5% | +13.8% |
IPWR | Ideal Power | Semiconductors | 🌱 Emerging Bull | +29.1% | +4.6% |
| Compared against · context, not the story | |||||
NVDA | NVIDIA | AI & Data Center GPUs | 🟢 Cont. Bull | +10.8% | +23.7% |
MPWR | Monolithic Power Systems | Analog & Mixed-Signal | 🟢 Cont. Bull | +7.8% | +69.4% |
WOLF | Wolfspeed | Discrete & Power | 🌱 Emerging Bull | +17.3% | +56.0% |
12-month price & trend
| Ticker | Mkt cap | P/E | P/E fwd | P/S | P/S fwd | P/GP | P/GP fwd | EV/EBITDA | FCF yld |
|---|---|---|---|---|---|---|---|---|---|
VICR | $11.5B | 79.7x | 74.0x | 24.3x | 19.1x | 42.9x | 33.7x | 86.8x | 0.4% |
NVTS | $3.8B | n/m | — | 104.3x | 81.1x | — | — | n/m | -1.8% |
BELFB | $3.6B | 75.0x | 31.5x | 4.9x | 4.5x | 12.4x | 11.3x | 25.9x | 2.0% |
| Ticker | Mkt cap | P/E | P/E fwd | P/S | P/S fwd | P/GP | P/GP fwd | EV/EBITDA | FCF yld |
|---|---|---|---|---|---|---|---|---|---|
BELFA | $3.7B | 75.0x | 26.6x | 4.9x | 4.6x | 12.4x | 11.5x | 25.9x | 2.0% |
ULBI | $122.1M | n/m | 8.5x | 0.7x | 0.5x | 2.7x | 2.3x | n/m | 1.7% |
IPWR | $86.2M | n/m | — | — | 107.8x | — | — | n/m | -11.0% |
| Ticker | Mkt cap | P/E | P/E fwd | P/S | P/S fwd | P/GP | P/GP fwd | EV/EBITDA | FCF yld |
|---|---|---|---|---|---|---|---|---|---|
NVDA | $5.5T | 34.3x | 25.0x | 21.5x | 13.9x | 29.0x | 18.7x | 28.3x | 2.2% |
MPWR | $66.9B | 83.1x | 50.2x | 20.5x | 16.3x | 37.1x | 29.5x | 65.2x | 0.9% |
WOLF | $1.7B | n/m | — | 2.4x | 2.6x | — | — | n/m | -43.9% |
Consensus projections
| Ticker | FY2026E | FY2027E | FY2028E | |
|---|---|---|---|---|
VICR | Revenue | +33.1% | +55.6% | +22.2% |
| EPS | +58.9% | +73.2% | +33.0% | |
NVTS | Revenue | +3.3% | +57.9% | +66.9% |
| EPS | −26.5% | −10.2% | −51.3% | |
BELFB | Revenue | +20.5% | +8.0% | +13.3% |
| EPS | +41.6% | +13.7% | +30.4% | |
BELFA | Revenue | +20.3% | +7.6% | +12.6% |
| EPS | +39.7% | +13.2% | +34.5% | |
ULBI | Revenue | +6.2% | — | — |
| EPS | +22.9% | — | — | |
IPWR | Revenue | +1500.0% | +275.0% | +186.7% |
| EPS | −21.8% | −17.5% | −11.3% | |
NVDA | Revenue | +65.1% | +84.2% | +43.2% |
| EPS | +59.0% | +91.7% | +42.0% | |
MPWR | Revenue | +47.9% | +26.0% | +13.5% |
| EPS | +53.3% | +28.2% | +13.2% | |
WOLF | Revenue | +0.7% | −14.8% | +24.1% |
| EPS | +275.2% | −30.1% | −11.8% |
Forward fiscal years only. Blank means no analyst coverage for that year.
The wiring inside an artificial-intelligence data center is being rebuilt. NVIDIA, working with Google and Microsoft through the Open Compute Project, is moving racks to distribution at 800 volts of direct current (800VDC) instead of the 54 volts used today — a change it says cuts copper use by up to 45%, with platforms in production and rolling out in the second half of 2026 behind more than 80 supplier firms. Six small American makers of the chips, modules, magnetics and switches in that power path have been swept up in the story. Only one of them has an order book that has already moved.
The company whose numbers arrived early
Vicor, an Andover, Massachusetts maker of brick-format DC-DC converter modules sold to equipment manufacturers, reported on 21 July. Its one-year backlog rose 26% sequentially to $379.7m, and was up 145% against the year before, with book-to-bill above 1.0. Advanced products — the newer, higher-density lines — jumped 45% sequentially to $94.2m and now make up 65.7% of revenue. Gross margin widened 280 basis points sequentially to 58.0%. Management guided full-year 2026 revenue above $600m and lifted its long-term target from $1bn of revenue at 65% gross margin to $2.5bn at 70%.
The headline growth rate hides all of that: revenue rose only 1.6% year-on-year, because the comparable quarter contained a $45m one-time patent settlement. The shares fell 7% on the day and have kept falling. Vicor touched an all-time high of $382.65 on 30 June, according to market data, and closed at $254.27 on Monday.
So the multiple has compressed while the order book expanded. This desk's own May record had Vicor at 61.8x trailing gross profit and 105x trailing earnings on a $14.4bn market value. It now trades at 42.9x trailing and 33.7x forward gross profit, 79.7x trailing earnings, on $11.5bn. The cautions are real: Vicor lost the NVIDIA H100 socket to Monolithic Power and holds Google's tensor-processor sockets instead; volume ramps for its second-generation vertical power delivery are guided to late in the fourth quarter of 2027; and its first chip fab is nearing capacity, with a second plant still at site selection. It is capacity-constrained before it is demand-constrained.
The rest of the group is bouncing, not advancing
The group's 19% month looks less like a trend on inspection. Late July saw chip stocks lose more than $1trn of market value on doubts about AI returns, which set the low base. Strip each stock's two best single sessions from the 30-day window and the group's average return goes to about -3.3%, with only Ultralife and Navitas still positive. Over three months the average gain is 3.9%.
Navitas, a Torrance, California designer of gallium nitride (GaN) and silicon carbide power chips, is the only member named in NVIDIA's 800VDC silicon supplier list. Its revenue fell 27.3% year-on-year to $10.5m, a fourth straight quarter of double-digit decline, and it posted a gross loss on a reported basis. Management expects AI infrastructure plus grid to exceed one-third of sales by year-end — roughly $4m to $5m a quarter — with rack-level GaN content arriving in 2027. The stock trades at 81x forward sales and about a third below the $21.89 at which it raised $373m in the spring.
Bel Fuse, the Jersey City maker of magnetics, connectors and the hot-pluggable power shelves that feed a rack, is the coherent grower: revenue up 25.2% to $210.7m, operating income up 47.4%, six consecutive quarters of positive book-to-bill. Its biggest growth contributor was defense at $66.5m, larger in dollars than its roughly $58m data-solutions line. The B shares trade at 31.5x forward earnings against 75x trailing — and consensus has revenue growth slowing to 8.0% next year.
Ultralife, which makes battery packs and radio accessories in Newark, New York, rose 19.4% in one session after reporting revenue down 1.3% to $47.9m; its record $117.5m backlog is Army communications work, and part of its margin gain came from a $1.1m tariff refund. It is the cheapest name here, at 0.54x forward sales. Ideal Power, a 17-employee Austin licensor of a bidirectional solid-state switch, booked $5,800 of revenue last quarter; it says it will ship breaker prototypes for 800-volt data-center testing with low-volume orders hoped for in the fourth quarter, against a $400m claimed pipeline.
Four of the six were in downtrends as of 14 August, their 50-day averages below their 200-day; Vicor crossed below on 12 August, mid-bounce.
The setup
Where it stands — Vicor's backlog and margins are accelerating while its multiple contracts; the other five have little shipped 800VDC revenue. Would confirm — Vicor's one-year backlog holds above $379.7m in the third quarter with book-to-bill over 1.0. Would invalidate — Full-year revenue guidance falling back below $600m, or advanced products slipping under 60% of sales. Watch next — Vicor's third-quarter report in late October; Navitas guided to $13.5m of revenue for the same quarter. Valuation — Vicor at 42.9x trailing and 33.7x forward gross profit, against 61.8x trailing in mid-May.















































































