Solar Stocks in the US

The largest Solar stocks in the US by market value are First Solar, Inc. ($20.9B), Nextpower Inc. ($16.1B) and Enphase Energy, Inc. ($4.2B), at prices of 4 Nov 2026.

• First Solar, Inc.: $194.51 | market value $20.9B | P/E 14.5
• Nextpower Inc.: $106.70 | market value $16.1B | P/E 28.5
• Enphase Energy, Inc.: $31.55 | market value $4.2B | P/E 48.4
• Sunrun Inc.: $8.79 | market value $2.1B | P/E 8
• SolarEdge Technologies, Inc.: $30.02 | market value $1.8B | P/E 50
• Shoals Technologies Group, Inc.: $9.16 | market value $1.5B | P/E 52.2
• Array Technologies, Inc.: $5.33 | market value $822M
• Canadian Solar Inc.: $10.78 | market value $731M | P/E 54.2
• TOYO Co.,: $5.18 | market value $221M | P/E 3.9
• Tigo Energy, Inc.: $2.04 (price from the week of 7 Aug 2026) | market value $99M | P/E 17.7

Share price | market value | P/E, biggest first. Prices and market values as of 4 Nov 2026; ratios as in the score list below.

Ranked by the 4-Factor Sector Score (growth & earnings 35, capital efficiency 25, valuation 20, relative strength 20). Prices as of 4 Nov 2026.

All 10 listed US Solar companies are named here, largest first. Every figure is equal-weighted across those companies and carries its own as-of date. One large company cannot set the reading.

1. First Solar, Inc.$20.9B
2. Nextpower Inc.$16.1B
3. Enphase Energy, Inc.$4.2B
4. Sunrun Inc.$2.1B
5. SolarEdge Technologies, Inc.$1.8B
6. Shoals Technologies Group, Inc.$1.5B
7. Array Technologies, Inc.$822M
8. Canadian Solar Inc.$731M
9. TOYO Co., Ltd.$221M
10. Tigo Energy, Inc.$99M

10 Solar companies in the Solar industry group (every listed company) have a page on Sector Alpha, by market value as of 4 November 2026, and all 10 are listed below, largest first. The largest is First Solar, Inc. ($20.9 billion) and the smallest with a market value is TOYO Co.,.

Download all 10 Solar companies (CSV)

The line below covers up to 5.2 years and opens on the 5Y view; the buttons cut it shorter. Over the last two years (104 weeks) this industry is 20% ahead of S&P 500. Earnings across its companies grew 24% on average over the last four reported quarters.

Price and the fundamentals both up. 0 of 10 companies ahead of S&P 500 by 5% or more over three months. 2 are 20% or more behind over a year while earnings grew 20% or more.

Not ahead of S&P 500 on the three-month view this week; 1 of the 10 companies in the industry index above their 200-day average (no change from four weeks earlier); 0 of those 10 ahead of S&P 500 by 5% or more over three months (no change from four weeks earlier); earnings rising at 7 of the 10 that report earnings.

Behind S&P 500 by −36.0% over a year, with participation off the floor of its own 26-week range. Earnings confirming, 7 of 10 members have higher trailing twelve-month earnings than a year ago.

Both lines start at 200 in the same week, so the gap between them tells the story: the industry line is an equal-weighted index of its 10 companies. The bars underneath are trailing 12-month earnings per share, one bar per reported quarter, each member set to 100 at the start and the industry taking the middle value, so a price line pulling away from flat bars means the market is paying more for the same earnings. A bar turns grey when that figure is lower than the quarter before. The rules are fixed and the same everywhere on this site: ahead by 5% or more over three months, or behind by 20% or more over a year while earnings grew 20% or more. Hover or tap any point to read both values and the gap.

Solar has done worse than the S&P 500 by 28.3% over the last 52 weeks. Over 13 weeks the gap is a shortfall of 12.9%. Shoals Technologies Group, Inc. is the strongest against the sector itself at +27.1%.

Solar has done worse than the S&P 500 by 28.3% over 52 weeks and by 12.9% over 13 weeks. 1 of 10 companies we track is beating the S&P 500 on relative strength (how a share price has done against the index over recent months) (1 has no relative-strength reading yet), and 3 of the 9 with a long enough price history are ahead of the industry itself.

A score that ranks each company against the others in its industry. The four parts shown always add up to the total: Growth & earnings (35), Capital efficiency (25), Valuation (20), and Relative strength (20). Missing or old evidence affects only its own part, never as a hidden adjustment.

First Solar, Inc. has the strongest current balance of earnings trajectory, business quality, valuation and price confirmation, with 81.1% evidence confidence.

Ranked last: too little evidence (1 company)

Under 60% of the evidence behind this score is available, so it ranks after every company above, whatever the score.

Enphase Energy, Inc. has the strongest one-year price move in Solar at +4.4%. Shoals Technologies Group, Inc. leads on relative strength against the S&P 500, at +0.7%. 1 of 10 companies we track is ahead of the index on that measure (1 has no relative-strength reading yet). Every line covers 314 weekly closes through 4 November 2026.

Price and relative strength

Price · same starting point: Every company, the sector's own index and S&P 500 all start level on the left edge of the window, so only the distance between the lines counts: the highest line has risen the most since then, and the chart at the top of this page is drawn the same way. It opens on one year; the buttons beside it stretch that to three or five.

RS vs S&P 500: How far ahead of or behind S&P 500 each company has been running, measured against its own recent average of that comparison, so the flat line at zero IS S&P 500: above it the company is beating the market, below it the market is beating the company. It opens on one year.

RS vs sector: The same measure taken against Solar itself instead of the whole market, so the flat line at zero is the sector: above it the company is beating its own peers, which is the sharper test of the two. It opens on one year.

Biggest one-year moves

Strongest against S&P 500

Strongest against the sector itself

First Solar, Inc. has the highest Revenue among the 10 Solar companies compared here, at $5,378 million. Canadian Solar Inc. is next at $4,990 million. TOYO Co., Ltd. has the highest Revenue growth at the 100% top of the scoring scale, so level and change sit with different companies. Its Revenue series carries 19 reported observations across the 20-quarter window.

What the numbers say: First Solar, Inc. is the largest at $5,378 million, 7.8% ahead of Canadian Solar Inc. TOYO Co., Ltd.'s growth is capped at 100% on the scoring scale; the full change over the last 12 months is 208.4% from a $549 million base, with 12 reported quarters out of the last 20. Fast growth from a smaller base is not yet the same as proven size.

What this means: First Solar, Inc. is the size to compare against; TOYO Co., Ltd. is the one growing fastest. The faster grower has to keep that growth and turn it into margin and returns before it counts as more than a fast start.

This conclusion weakens if: First Solar, Inc.'s growth falls below TOYO Co., Ltd.'s for two consecutive comparable reports while operating margin also compresses.

Revenue is compared on a common reported-currency basis. Growth is year-on-year, so seasonality does not masquerade as progress.

Revenue · company comparison

Revenue · largest

Revenue growth · fastest growers

All-company data · latest reported quarter

In every all-company table on this page, each figure is the company’s latest single reported quarter. The rankings above them use trailing-twelve-month or current-market values, so a company can legitimately show a different number in each.

Revenue shows both size and speed. A large company can absorb shocks and pay for wide distribution; faster growth can mean market-share gains, new capacity or stronger demand. The best sign is usually growth that lasts without hurting margins and returns.

First Solar, Inc. has the highest OPM among the 10 Solar companies compared here, at 42.6%. Nextpower Inc. is next at 20.9%. Sunrun Inc. has the highest Margin change at +23.7 percentage points, so level and change sit with different companies. 10 of 10 companies report a comparable reading, the latest through Jun 2026.

What the numbers say: First Solar, Inc. leads opm at 42.6%; Sunrun Inc. leads margin change at +23.7 percentage points.

What this means: First Solar, Inc. sets the level to compare against; the company improving fastest needs another report to confirm the change.

This conclusion weakens if: The next two comparable reports reverse the current margin change signal.

Operating margin compares operating profit with revenue. Improvement is measured in percentage points, not percentage growth.

Operating margin · company comparison

OPM · highest

Margin change · fastest expanders

All-company data · latest reported quarter

First Solar, Inc. has the highest Net profit among the 10 Solar companies compared here, at $1,747 million. Sunrun Inc. is next at $401 million. TOYO Co., Ltd. has the highest Profit growth at the 100% top of the scoring scale, so level and change sit with different companies.

What the numbers say: First Solar, Inc. earns the most, $1,747 million of profit over the last 12 months, 335.7% above Sunrun Inc. TOYO Co., Ltd. shows at least 100% on the scoring scale (316.7% in full) growth from a profit base of $75 million. A fast rate from a small base matters less than a large profit that keeps coming.

What this means: First Solar, Inc. sets the level to compare against; the company improving fastest needs another report to confirm the change.

This conclusion weakens if: The next two comparable reports reverse the current profit growth signal.

Net profit is the residual after operating costs, interest and tax. Growth off a loss or near-zero base is excluded from the fastest-grower rank.

Net profit · company comparison

Net profit · largest

Profit growth · fastest growers

All-company data · latest reported quarter

TOYO Co., Ltd. has the highest ROCE among the 10 Solar companies compared here, at 36.7%. Nextpower Inc. is next at 22.8%. Tigo Energy, Inc. has the highest ROCE change at +311.1 percentage points, so level and change sit with different companies. 10 of 10 companies report a comparable reading, the latest through Jun 2026.

What the numbers say: TOYO Co., Ltd. leads ROCE at 36.7%, 13.9 percentage points above Nextpower Inc. A high return reported once may be one good year; a high return reported year after year shows a lasting business.

What this means: TOYO Co., Ltd. sets the level to compare against; the company improving fastest needs another report to confirm the change.

This conclusion weakens if: The next two comparable reports reverse the current roce change signal.

ROCE asks how much operating return the business earns on the capital employed. Direction matters, but a single exceptional year should not be mistaken for durability.

Return on capital · company comparison

ROCE · highest

ROCE change · fastest improvers

All-company data · latest reported quarter

Sunrun Inc. has the lowest PEG among the 10 Solar companies compared here, at 0.14×. First Solar, Inc. is next at 0.38×. Array Technologies, Inc. has the lowest P/E at −7.71×, so level and change sit with different companies. 5 of 10 companies report a comparable reading, the latest through Jun 2026.

What the numbers say: Sunrun Inc. has the lowest comparable PEG at 0.14×, 63.2% below First Solar, Inc. That would need today's multiple, the company's own history and steady growth to agree.

What this means: A low valuation is a reason to look closer at the business, not a conclusion on its own.

This conclusion weakens if: The next two comparable reports reverse the current p/e signal.

PEG is shown only when earnings are positive and three-year EPS growth is between 5% and 60%. It is worked out the same way every time, as the P/E on the last 12 months of reported earnings divided by that growth rate, never on expected earnings. On Indian companies it is shown only where the two data feeds agreed. Where any of that fails the ratio is left out rather than printed: a P/E divided by a loss, or by growth measured off a tiny base, is a number that looks precise and means nothing.

Valuation · company comparison

PEG · lowest PEG

P/E · lowest P/E

All-company data · latest reported quarter

This Solar comparison names 4 specific ways its own evidence can mislead, all listed below. All 10 companies here report on comparable dates, so no rank carries a stale marker. A high growth rate can still come from a very small starting figure.

Keep these limits visible

• A high growth rate can come from a very small starting figure. The page keeps level and change separate for that reason.
• A high ROCE can be temporary, or look high because the capital base is small. It is best read beside margin, cash flow and how much is spent back on the business.
• The 4-Factor Sector Score ranks published data only. Management quality, upcoming events and risks are not part of it.
• An “all companies” line chart preserves completeness, but rank changes should be checked against reporting dates before drawing a conclusion.

This comparison is built from the reported filings of 10 Solar companies, normalized to a common $ scale and a shared quarter axis of up to 20 quarters each. Fundamentals run through Sep 2026 and market data through 4 November 2026.

These 22 answers restate the Solar comparison above in question form. Every one is computed from the same 10 companies and the same reported filings as the rankings and charts, current through Sep 2026. Price and relative-strength answers run through 4 November 2026. Nothing here is estimated, and none of it is a recommendation.