Third-quarter earnings season kicks off for the 3D printing group on Wednesday, Oct. 21, when Sweden's Arcam (NASDAQOTH:AMAVF) reports before the market opens. Consider this your 3D printing investors' guide to the season -- Wall Street analysts' expectations and earnings dates (for those companies that have announced them) for the six pure plays all in one place. We'll be providing more in-depth earnings previews for the diversified industry leaders Stratasys (NASDAQ:SSYS) and 3D Systems (NYSE:DDD), as well as industrial specialist ExOne (NASDAQ:XONE), soon before they report. 

Overview

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The carnage in the 3D printing space began in early 2014 when 3D Systems and Stratasys issued earnings warnings and announced that they were significantly boosting expenditures aimed at stimulating long-term growth. This, of course, meant that earnings would suffer. Not only have earnings suffered, but both companies have been turning in revenue growth below what the market expects from so-called "growth stocks."

3D Systems has generally turned in subpar earnings reports for nearly two years, while Stratasys was performing relatively solidly until its MakerBot desktop 3D printer unit imploded in the fourth quarter of 2014. The industry's growth and projected growth dynamics, however, remain rosy. With attractive growth dynamics comes increased competition -- and the notable competitors to watch include start-up Carbon3D and Hewlett-Packard. Both have announced plans to enter the market in 2016 with enterprise-focused 3D printers that are considerably faster than the ones currently available.

ExOne has missed analysts' expectations and its own revenue guidance since it went public in February 2013. Its third- and fourth-quarter reports are especially critical, as the company's counting on the second half of the year to post an especially outsize portion of its 2015 revenue guidance. ExOne has itself to blame for a portion of the pounding its stock has taken. However, market timing is an especially big factor here. The company went public at the height of 3D printing mania, so its valuation was bid up to stratospheric levels early on. 

Germany-based voxeljet's (yes, it's a small "v") story is somewhat similar, as it also went public during the tail end of the 3D printing frenzy in late 2013. The stocks of Sweden-based Arcam and Belgium-based Materialise (NASDAQ:MTLS) have performed the best -- or "the least worse" -- among the group over the past year. Arcam's generally been posting solid results, while Materialise has turned in some promising results. Materialise's stock has also held its own because the company went public in mid-2014, after the love affair with 3D printing stocks began cooling off. 

Here are the earnings dates and analysts' estimates for the six pure-play 3D printing companies. 

Arcam: Wednesday, Oct. 21 -- before the market opens
We don't have earnings estimates for Arcam. That's largely because it's a smaller, foreign-based company that trades over the counter in the United States. Like ExOne, it's strictly involved in the industrial market. 

Arcam releases earnings at 8 a.m. CEST (Central European Summer Time) -- or 2 a.m. EDT -- so later-night folks can check out its results well before the market opens on Wednesday. 

Stratasys: Wednesday, Nov. 4 -- before the market opens
(Look for my in-depth earnings preview soon before Stratasys reports.) 

Analysts' expectations for the quarter and year: 

Analysts' Q3 Revenue Estimate

$184.5 million (represents YOY decrease of 9.4%)

Analysts' Q3 Adjusted EPS Estimate

$0.08 (represents YOY decrease of 86%)

Analysts' 2015 Revenue Estimate

$745.4 million (represents YOY decrease of 0.70%)

Analysts' 2015 Adjusted EPS Estimate

$0.53 (represents YOY decrease of 74%)

Source: Yahoo! Finance.

3D Systems: Wednesday, Nov. 4 -- before the market opens
(Look for my colleague Steve Heller's earnings preview soon before 3D Systems reports.) 

Analysts' expectations for the quarter and year: 

Analysts' Q3 Revenue Estimate

$184.7 million (represents YOY growth of 11%)

Analysts' Q3 Adjusted EPS Estimate

$0.09 (represents YOY decrease of 50%)

Analysts' 2015 Revenue Estimate

$722.4 million (represents YOY growth of 11%)

Analysts' 2015 Adjusted EPS Estimate

$0.32 (represents YOY decrease of 54%)

Source: Yahoo! Finance.

ExOne: Monday, November 9 -- after the market closes
(Look for Steve Heller's earnings preview soon before ExOne reports.) 

Analysts' expectations for the quarter and year: 

Analysts' Q3 Revenue Estimate

$16.9 million (represents YOY growth of 76%)

Analysts' Q3 Adjusted EPS Estimate

$(0.10) (represents YOY growth of 68%)

Analysts' 2015 Revenue Estimate

$55.6 million (represents YOY growth of 27%)

Analysts' 2015 Adjusted EPS Estimate

$(1.02) (represents YOY growth of 33%)

Source: Yahoo! Finance.

voxeljet: Thursday, Nov. 12 -- after the market closes
Analysts' expectations for the quarter and year: 

Analysts' Q3 Revenue Estimate

$5.8 million (represents YOY growth of 54%)

Analysts' Q3 Adjusted EPS Estimate

$(0.11) (represents YOY decrease of 38%)

Analysts' 2015 Revenue Estimate

$24.0 million (represents YOY growth of 49%)

Analysts' 2015 Adjusted EPS Estimate

$(0.41) (represents YOY decrease of 71%)

Source: Yahoo! Finance.

Materialise: Friday, Nov. 13 -- before the market opens
Analysts' expectations for the quarter and year: 

Analysts' Q3 Revenue Estimate

$25 million (represents YOY growth of 26%)

Analysts' Q3 Adjusted EPS Estimate

$(0.01) (versus gain of $0.05)

Analysts' 2015 Revenue Estimate

$100.5 million (represents YOY growth of 24%)

Analysts' 2015 Adjusted EPS Estimate

$(0.06) (versus gain of $0.05)

Source: Yahoo! Finance.

Beth McKenna has no position in any stocks mentioned. The Motley Fool recommends 3D Systems and Stratasys. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.