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Gevo, Inc. (GEVO) Annual Reports

Gevo, Inc. is listed on Nasdaq, classified by the SEC under Industrial Organic Chemicals (SIC 2860). This page indexes 3 annual reports, each linking to the full text on the SEC's EDGAR system.

Company profile

  • Exchange: Nasdaq
  • Fiscal year end: 12/31
  • SEC CIK: 1392380 →

Website:Official site ↗

Financial Highlights

FY2026 Q2 (quarterly, ended 2026-06-30)
CurrentPrior yearYoY
Revenue $46.5M $43.4M +7.1%
Operating income $-171.7M $5.8M -3062.5%
Net income $-176.9M $2.1M -8352.8%
EPS (diluted) $-0.75 $0.01 -7600.0%

Source: SEC EDGAR (XBRL company facts)

Financial history

Revenue & profit
Quarterly · In mn (USD)
Revenue 46.5 mn Net income -177 mn
2009Q4 2010Q2 2010Q3 2010Q4 2011Q3 2011Q4 2011Q4 2011Q4 2012Q4 2012Q4 2012Q4 2012Q4 2013Q4 2013Q4 2013Q4 2013Q4 2014Q4 2014Q4 2014Q3 2014Q4 2015Q1 2015Q2 2015Q3 2015Q4 2016Q1 2016Q2 2016Q3 2016Q4 2017Q1 2017Q2 2017Q3 2017Q4 2018Q1 2018Q2 2018Q3 2018Q4 2019Q1 2019Q2 2019Q3 2019Q4 2020Q1 2020Q2 2020Q3 2020Q4 2021Q1 2021Q2 2021Q3 2021Q4 2022Q1 2022Q2 2022Q3 2022Q4 2023Q1 2023Q2 2023Q3 2023Q4 2024Q1 2024Q2 2024Q3 2024Q4 2025Q1 2025Q2 2025Q3 2025Q4 2026Q1 2026Q2
Show table:Income statement
Item2009Q42010Q22010Q32010Q42011Q32011Q42011Q42011Q42012Q42012Q42012Q42012Q42013Q42013Q42013Q42013Q42014Q42014Q42014Q32014Q42015Q12015Q22015Q32015Q42016Q12016Q22016Q32016Q42017Q12017Q22017Q32017Q42018Q12018Q22018Q32018Q42019Q12019Q22019Q32019Q42020Q12020Q22020Q32020Q42021Q12021Q22021Q32021Q42022Q12022Q22022Q32022Q42023Q12023Q22023Q32023Q42024Q12024Q22024Q32024Q42025Q12025Q22025Q32025Q42026Q12026Q2
Revenue0.66 0.46 1.50 14.1 15.3 14.5 17.5 17.2 14.9 7.03 0.56 1.92 3.54 1.86 1.13 1.70 0.9 7.72 10.1 9.50 5.90 8.92 8.02 7.30 6.32 8.11 6.94 5.84 5.62 7.54 7.70 6.68 8.24 9.42 8.57 6.63 6.40 5.09 6.11 6.89 3.83 0.99 0.19 0.53 0.09 0.35 0.12 0.05 0.23 0.09 0.31 0.55 4.06 4.24 4.53 4.37 3.99 5.26 1.97 5.70 29.1 43.4 42.7 45.4 43.0 46.5
Gross profit0.66 0.46 0.64 1.52 0.09 0.9 1.27 1.70 -0.14 -1.48 -5.52 -0.89 -0.96 -1.76 -3.62 -3.35 -3.78 -0.55 -1.62 -1.37 -3.33 -0.97 -2.61 -1.70 -2.90 -1.88 -2.71 -2.32 -3.79 -2.16 -2.01 -2.66 -2.34 -1.27 -2.05 -3.04 -2.56 -3.37 -3.78 -2.54 -4.31 -1.66 -2.07 -1.43 -1.90 -2.37 -3.34 -3.84 -3.95 -3.64 -3.59 18.9 19.8
Operating income-35.5 -11.6 -11.5 -13.1 -18.2 -15.8 -24.4 -13.0 -12.9 -13.9 -15.8 -13.0 -12.9 -9.03 -8.91 -8.91 -9.54 -6.53 -9.27 -6.59 -5.87 -5.49 -6.13 -6.49 -7.18 -6.18 -5.11 -4.81 -5.00 -4.38 -6.11 -6.71 -5.63 -6.49 -8.00 -6.23 -7.98 -5.26 -6.10 -7.00 -9.88 -19.0 -14.7 -16.5 -15.9 -16.1 -43.7 -26.9 -20.9 -18.9 -20.7 -21.3 -23.1 -24.0 -24.0 -19.6 -20.1 5.80 -3.69 -2.18 -4.90 -172
Net income-19.9 -8.60 -17.3 -6.34 -9.28 -12.5 -12.3 -14.2 -19.3 -16.2 -27.1 1.82 -18.4 -15.2 -15.9 -17.3 -12.0 -17.2 -0.94 -11.1 -7.34 -14.4 -6.52 -7.96 -3.60 -21.5 -9.85 -2.29 -5.93 -10.2 -4.15 -4.39 -2.50 -11.5 -6.88 -7.10 -6.14 -7.09 -8.62 -6.81 -9.25 -6.04 -6.84 -18.1 -10.1 -18.3 -14.4 -16.5 -15.7 -13.2 -43.8 -25.4 -17.6 -14.4 -15.7 -18.5 -18.9 -21.0 -21.2 -17.6 -21.7 2.14 -7.95 -6.30 -21.7 -177
Balance sheet
Quarterly · In mn (USD)
Total assets 491 mn Total liabilities 210 mn
2009Q4 2010Q2 2010Q3 2010Q4 2011Q3 2011Q4 2011Q4 2011Q4 2012Q4 2012Q4 2012Q4 2012Q4 2013Q4 2013Q4 2013Q4 2013Q4 2014Q4 2014Q4 2014Q3 2014Q4 2015Q1 2015Q2 2015Q3 2015Q4 2016Q1 2016Q2 2016Q3 2016Q4 2017Q1 2017Q2 2017Q3 2017Q4 2018Q1 2018Q2 2018Q3 2018Q4 2019Q1 2019Q2 2019Q3 2019Q4 2020Q1 2020Q2 2020Q3 2020Q4 2021Q1 2021Q2 2021Q3 2021Q4 2022Q1 2022Q2 2022Q3 2022Q4 2023Q1 2023Q2 2023Q3 2023Q4 2024Q1 2024Q2 2024Q3 2024Q4 2025Q1 2025Q2 2025Q3 2025Q4 2026Q1 2026Q2

Equity = assets − liabilities. Balance-sheet figures are period-end balances, not cumulative.

Show table:Balance sheet
Item2009Q42010Q22010Q32010Q42011Q32011Q42011Q42011Q42012Q42012Q42012Q42012Q42013Q42013Q42013Q42013Q42014Q42014Q42014Q32014Q42015Q12015Q22015Q32015Q42016Q12016Q22016Q32016Q42017Q12017Q22017Q32017Q42018Q12018Q22018Q32018Q42019Q12019Q22019Q32019Q42020Q12020Q22020Q32020Q42021Q12021Q22021Q32021Q42022Q12022Q22022Q32022Q42023Q12023Q22023Q32023Q42024Q12024Q22024Q32024Q42025Q12025Q22025Q32025Q42026Q12026Q2
Current assets23.9 117 108 103 84.2 44.3 98.3 75.9 61.3 46.0 32.1 30.7 14.9 14.2 20.9 13.7 11.6 28.3 20.7 22.6 13.5 28.1 36.2 33.3 26.6 22.9 21.2 17.7 13.3 47.6 43.2 38.7 41.7 34.1 25.8 24.2 16.0 13.4 88.2 83.3 534 329 361 352 335 485 432 415 386 429 411 386 282 258 237 204 104 170 137 143 116 102
Total assets51.6 141 133 133 128 118 179 156 142 126 117 116 100 102 107 98.9 95.0 110 101 103 95.5 109 116 112 105 97.0 93.9 88.8 82.9 116 111 107 111 104 95.5 93.4 84.2 80.1 153 152 609 686 675 666 639 775 729 701 689 675 670 650 634 618 604 584 678 702 685 719 654 491
Current liabilities12.1 9.34 12.0 16.1 24.2 32.8 21.6 16.8 18.7 20.3 29.7 21.1 17.1 13.2 10.6 12.0 13.7 15.0 10.5 18.3 32.5 34.5 40.3 34.7 26.4 15.8 13.7 11.2 7.31 4.29 5.58 5.29 18.3 17.7 18.1 20.1 19.0 19.2 18.1 4.93 10.7 21.5 27.5 32.6 17.9 25.6 17.6 25.4 25.6 89.6 96.4 91.4 22.1 25.3 28.7 24.4 51.0 73.2 71.7 78.6 26.9 37.6
Total liabilities31.6 27.6 29.9 40.9 50.8 54.6 83.8 58.3 54.5 46.8 52.4 45.4 40.1 58.3 50.0 52.0 49.6 51.9 48.0 54.8 48.1 51.1 49.1 43.1 27.7 29.4 27.5 25.3 21.3 16.4 18.1 18.3 18.9 18.2 18.6 20.9 19.7 20.2 18.9 5.72 13.0 110 116 119 104 111 104 95.3 95.2 91.5 98.0 92.9 91.6 95.2 99.1 94.5 203 222 210 248 199 210
Equity15.1 20.0 114 103 92.1 77.2 62.9 94.9 97.8 87.7 79.6 64.8 71.0 60.1 43.6 57.5 47.0 45.4 58.2 52.9 48.3 47.4 58.2 67.0 69.3 76.9 67.6 66.4 63.5 61.6 99.6 93.2 88.8 92.5 85.6 76.9 72.5 64.5 59.9 135 146 596 576 560 547 534 664 625 605 593 583 572 557 542 523 505 489 470 474 469 466 448 273
Cash flow
Quarterly · In mn (USD)
Operating -8.27 mn Investing -12.5 mn Financing 0.01 mn
2009Q4 2010Q2 2010Q3 2010Q4 2011Q3 2011Q4 2011Q4 2011Q4 2012Q4 2012Q4 2012Q4 2012Q4 2013Q4 2013Q4 2013Q4 2013Q4 2014Q4 2014Q4 2014Q3 2014Q4 2015Q1 2015Q2 2015Q3 2015Q4 2016Q1 2016Q2 2016Q3 2016Q4 2017Q1 2017Q2 2017Q3 2017Q4 2018Q1 2018Q2 2018Q3 2018Q4 2019Q1 2019Q2 2019Q3 2019Q4 2020Q1 2020Q2 2020Q3 2020Q4 2021Q1 2021Q2 2021Q3 2021Q4 2022Q1 2022Q2 2022Q3 2022Q4 2023Q1 2023Q2 2023Q3 2023Q4 2024Q1 2024Q2 2024Q3 2024Q4 2025Q1 2025Q2 2025Q3 2025Q4 2026Q1 2026Q2

Positive = cash in, negative = cash out.

Show table:Cash flow statement
Item2009Q42010Q22010Q32010Q42011Q32011Q42011Q42011Q42012Q42012Q42012Q42012Q42013Q42013Q42013Q42013Q42014Q42014Q42014Q32014Q42015Q12015Q22015Q32015Q42016Q12016Q22016Q32016Q42017Q12017Q22017Q32017Q42018Q12018Q22018Q32018Q42019Q12019Q22019Q32019Q42020Q12020Q22020Q32020Q42021Q12021Q22021Q32021Q42022Q12022Q22022Q32022Q42023Q12023Q22023Q32023Q42024Q12024Q22024Q32024Q42025Q12025Q22025Q32025Q42026Q12026Q2
Operating-16.1 -9.35 -6.52 -5.03 -10.6 -9.32 -81.5 -7.85 -16.9 -7.53 -22.9 -20.8 -9.01 -10.2 -12.5 -15.3 -13.0 -12.2 -7.39 -6.38 -9.49 -5.40 -6.13 -7.15 -5.50 -5.86 -4.84 -4.31 -8.05 -5.34 -3.06 -4.19 -4.35 -3.45 -2.35 -5.70 -5.71 -3.94 -5.14 -6.04 -6.99 -3.82 -3.78 -4.76 -7.16 -12.3 -9.22 -14.8 -12.5 -4.65 -19.7 -15.8 -19.4 -9.93 8.25 -32.6 -16.1 -11.4 -11.0 -18.8 -24.1 -2.52 -6.79 19.9 -21.1 -8.27
Investing-2.94 -0.33 -24.5 -0.89 -0.8 -1.45 -36.8 -4.49 -8.09 -27.1 -16.4 -1.50 -2.00 -0.76 0.13 -5.05 -2.87 -3.58 -0.72 -0.34 -0.13 0.1 -0.1 -1.19 -2.25 -2.60 -0.67 -0.42 -0.67 -0.64 -0.37 -0.22 -0.07 -0.03 -0.84 -1.30 -2.20 -2.35 -2.70 -0.2 -0.78 -0.84 -0.14 -4.15 -4.63 -432 8.54 16.4 7.86 -16.2 53.2 48.5 124 15.3 -32.4 6.96 -17.5 -9.20 -10.5 -14.6 -204 -5.24 -7.83 -9.21 -9.12 -12.5
Financing30.6 30.6 11.4 -1.32 113 -0.52 216 8.96 4.39 -0.43 92.7 -3.01 -1.64 -2.57 -2.52 19.3 -0.35 13.3 16.2 -0.93 7.61 23.5 -0.1 9.17 -0.61 22.4 14.0 1.55 1.23 -0.72 1.89 1.20 -0.11 23.5 14.5 2.42 9.64 -0.01 -0.36 1.60 0.75 1.71 78.2 6.62 459 64.1 -8.34 -1.66 -0.35 139 -4.27 4.26 -0.06 -0.04 -0.05 -0.04 -1.45 -4.60 -0.94 -0.37 104 -0.27 -3.91 -2.18 -7.77 0.01
Cash at period end21.2 42.1 22.5 15.3 116 105 97.6 94.2 73.6 38.6 92.0 66.7 54.1 40.6 25.7 24.6 8.42 5.91 14.0 6.36 4.35 22.5 16.2 17.0 8.67 22.6 31.1 27.9 20.4 16.3 14.8 11.6 7.03 27.0 38.3 33.7 35.5 29.2 20.9 16.3 9.29 6.34 80.6 78.3 525 17.1 16.2 40.8 44.6 173 201 237 342 348 324 298 271 246 223 189 65.3 57.3 72.6 81.2 78.9 58.1
Profitability
Quarterly · %
Gross margin 42.6% Operating margin -369.3% Net margin -380.5%
2009Q4 2010Q2 2010Q3 2010Q4 2011Q3 2011Q4 2011Q4 2011Q4 2012Q4 2012Q4 2012Q4 2012Q4 2013Q4 2013Q4 2013Q4 2013Q4 2014Q4 2014Q4 2014Q3 2014Q4 2015Q1 2015Q2 2015Q3 2015Q4 2016Q1 2016Q2 2016Q3 2016Q4 2017Q1 2017Q2 2017Q3 2017Q4 2018Q1 2018Q2 2018Q3 2018Q4 2019Q1 2019Q2 2019Q3 2019Q4 2020Q1 2020Q2 2020Q3 2020Q4 2021Q1 2021Q2 2021Q3 2021Q4 2022Q1 2022Q2 2022Q3 2022Q4 2023Q1 2023Q2 2023Q3 2023Q4 2024Q1 2024Q2 2024Q3 2024Q4 2025Q1 2025Q2 2025Q3 2025Q4 2026Q1 2026Q2

Gross, operating and net margin = the respective profit ÷ revenue.

Show table:Profitability
Item2009Q42010Q22010Q32010Q42011Q32011Q42011Q42011Q42012Q42012Q42012Q42012Q42013Q42013Q42013Q42013Q42014Q42014Q42014Q32014Q42015Q12015Q22015Q32015Q42016Q12016Q22016Q32016Q42017Q12017Q22017Q32017Q42018Q12018Q22018Q32018Q42019Q12019Q22019Q32019Q42020Q12020Q22020Q32020Q42021Q12021Q22021Q32021Q42022Q12022Q22022Q32022Q42023Q12023Q22023Q32023Q42024Q12024Q22024Q32024Q42025Q12025Q22025Q32025Q42026Q12026Q2
Gross margin100.0%100.0%42.8%10.8%0.6%6.2%7.3%9.9%-0.9%-21.1%-981.7%-46.1%-27.1%-94.5%-321.1%-197.8%-418.3%-7.1%-16.0%-14.4%-56.5%-10.9%-32.6%-23.4%-45.9%-23.1%-39.0%-39.7%-67.5%-28.7%-26.1%-39.9%-28.4%-13.5%-23.9%-45.9%-40.0%-66.2%-61.9%-36.9%-112.8%-167.6%-1077.1%-269.1%-2044.1%-685.5%-2783.3%-7113.0%-1702.2%-4088.8%-1161.5%43.6%42.6%
Operating margin-251.7%-80.0%-65.8%-76.2%-122.5%-224.1%-4346.3%-678.0%-363.7%-745.8%-1398.7%-767.1%-1431.0%-117.0%-87.9%-93.8%-161.7%-73.2%-115.7%-90.3%-92.8%-67.7%-88.3%-111.3%-127.9%-81.9%-66.4%-72.0%-60.6%-46.5%-71.2%-101.4%-87.9%-127.7%-131.0%-90.4%-208.5%-532.1%-3178.7%-1318.1%-10621.5%-5497.7%-12260.0%-30514.8%-6877.2%-18106.7%-14132.4%-4944.4%-513.7%-446.3%-457.7%-487.8%-580.0%-456.8%-1221.8%-344.7%-69.2%13.3%-8.6%-4.8%-11.4%-369.3%
Net margin-3012.9%-1861.7%-1157.0%-45.0%-60.8%-85.8%-70.3%-82.2%-129.8%-230.2%-4813.4%94.8%-518.5%-818.8%-1409.5%-1022.4%-1325.8%-222.2%-9.3%-116.6%-124.5%-161.0%-81.3%-109.1%-57.0%-264.9%-141.8%-39.2%-105.7%-134.7%-53.9%-65.7%-30.4%-122.0%-80.2%-107.2%-95.8%-139.4%-141.1%-98.9%-241.9%-611.6%-3560.4%-3400.0%-10814.0%-5275.4%-11983.3%-30579.6%-6755.6%-14787.6%-14170.2%-4658.2%-433.9%-340.3%-346.7%-422.4%-473.1%-399.3%-1076.6%-308.9%-74.6%4.9%-18.6%-13.9%-50.5%-380.5%
Returns & leverage
Quarterly · %
ROE -57.0% ROA -35.7% Debt ratio 42.8%
2009Q4 2010Q2 2010Q3 2010Q4 2011Q3 2011Q4 2011Q4 2011Q4 2012Q4 2012Q4 2012Q4 2012Q4 2013Q4 2013Q4 2013Q4 2013Q4 2014Q4 2014Q4 2014Q3 2014Q4 2015Q1 2015Q2 2015Q3 2015Q4 2016Q1 2016Q2 2016Q3 2016Q4 2017Q1 2017Q2 2017Q3 2017Q4 2018Q1 2018Q2 2018Q3 2018Q4 2019Q1 2019Q2 2019Q3 2019Q4 2020Q1 2020Q2 2020Q3 2020Q4 2021Q1 2021Q2 2021Q3 2021Q4 2022Q1 2022Q2 2022Q3 2022Q4 2023Q1 2023Q2 2023Q3 2023Q4 2024Q1 2024Q2 2024Q3 2024Q4 2025Q1 2025Q2 2025Q3 2025Q4 2026Q1 2026Q2

ROE / ROA = trailing four-quarter net income ÷ average equity / total assets (annual mode: the year’s net income ÷ average of opening and closing). Not computed when the denominator is zero or negative.

Show table:Returns & leverage
Item2009Q42010Q22010Q32010Q42011Q32011Q42011Q42011Q42012Q42012Q42012Q42012Q42013Q42013Q42013Q42013Q42014Q42014Q42014Q32014Q42015Q12015Q22015Q32015Q42016Q12016Q22016Q32016Q42017Q12017Q22017Q32017Q42018Q12018Q22018Q32018Q42019Q12019Q22019Q32019Q42020Q12020Q22020Q32020Q42021Q12021Q22021Q32021Q42022Q12022Q22022Q32022Q42023Q12023Q22023Q32023Q42024Q12024Q22024Q32024Q42025Q12025Q22025Q32025Q42026Q12026Q2
ROE-261.2%-39.9%-39.1%-86.0%-75.4%-70.1%-77.4%-63.9%-72.5%-82.5%-59.7%-79.2%-81.7%-101.1%-77.5%-69.8%-69.2%-66.3%-71.2%-76.0%-69.9%-68.0%-71.6%-63.3%-63.6%-44.9%-33.8%-37.1%-30.6%-26.9%-31.6%-36.7%-41.0%-29.4%-34.0%-35.5%-40.5%-42.3%-27.4%-36.7%-12.4%-16.7%-17.5%-17.1%-11.5%-9.6%-15.1%-17.0%-17.7%-16.2%-12.2%-11.4%-11.9%-13.4%-14.8%-15.0%-16.1%-11.7%-9.3%-7.1%-7.4%-57.0%
ROA-101.0%-32.1%-30.3%-52.2%-45.5%-47.9%-49.2%-42.0%-44.3%-48.2%-32.2%-49.0%-49.8%-54.6%-42.2%-38.2%-37.4%-31.8%-37.7%-35.8%-34.1%-36.1%-39.5%-34.6%-39.5%-27.4%-21.5%-24.5%-22.6%-21.2%-24.6%-28.6%-32.5%-24.8%-28.0%-28.6%-32.5%-33.4%-23.3%-32.7%-11.8%-13.9%-14.7%-14.5%-10.4%-8.2%-12.7%-14.3%-15.1%-14.0%-10.4%-9.8%-10.2%-11.5%-12.5%-12.7%-12.4%-8.8%-7.0%-5.2%-5.1%-35.7%
Debt ratio61.3%19.6%22.4%30.7%39.7%46.5%46.9%37.3%38.3%37.0%44.7%39.0%40.0%57.2%46.5%52.5%52.2%47.1%47.6%53.1%50.3%46.7%42.3%38.3%26.5%30.3%29.3%28.5%25.7%14.2%16.3%17.1%17.0%17.5%19.4%22.3%23.4%25.2%12.3%3.8%2.1%16.0%17.1%17.9%16.3%14.3%14.3%13.6%13.8%13.6%14.6%14.3%14.5%15.4%16.4%16.2%29.9%31.7%30.7%34.5%30.4%42.8%
EPS
Quarterly · US$
EPS US$-0.75
2009Q4 2010Q2 2010Q3 2010Q4 2011Q3 2011Q4 2011Q4 2011Q4 2012Q4 2012Q4 2012Q4 2012Q4 2013Q4 2013Q4 2013Q4 2013Q4 2014Q4 2014Q4 2014Q3 2014Q4 2015Q1 2015Q2 2015Q3 2015Q4 2016Q1 2016Q2 2016Q3 2016Q4 2017Q1 2017Q2 2017Q3 2017Q4 2018Q1 2018Q2 2018Q3 2018Q4 2019Q1 2019Q2 2019Q3 2019Q4 2020Q1 2020Q2 2020Q3 2020Q4 2021Q1 2021Q2 2021Q3 2021Q4 2022Q1 2022Q2 2022Q3 2022Q4 2023Q1 2023Q2 2023Q3 2023Q4 2024Q1 2024Q2 2024Q3 2024Q4 2025Q1 2025Q2 2025Q3 2025Q4 2026Q1 2026Q2
Show table:EPS
Item2009Q42010Q22010Q32010Q42011Q32011Q42011Q42011Q42012Q42012Q42012Q42012Q42013Q42013Q42013Q42013Q42014Q42014Q42014Q32014Q42015Q12015Q22015Q32015Q42016Q12016Q22016Q32016Q42017Q12017Q22017Q32017Q42018Q12018Q22018Q32018Q42019Q12019Q22019Q32019Q42020Q12020Q22020Q32020Q42021Q12021Q22021Q32021Q42022Q12022Q22022Q32022Q42023Q12023Q22023Q32023Q42024Q12024Q22024Q32024Q42025Q12025Q22025Q32025Q42026Q12026Q2
EPS(US$)-0.05-0.09-0.07-0.08-0.08-0.06-0.19-0.10-0.07-0.06-0.07-0.08-0.08-0.09-0.09-0.09-0.090.01-0.03-0.02-0.09-0.75

Source: SEC EDGAR (XBRL company facts)

Annual reports by year

10-K: annual report of a US domestic issuer. Filings are the original documents hosted on SEC EDGAR — this site neither mirrors nor edits them.

FAQ

Where can I read Gevo, Inc. (GEVO) annual reports?

Every year in the table above links straight to the full text on SEC EDGAR. US annual reports are web pages (HTML) rather than PDFs, so you can read and search them in the browser without downloading anything. 3 filings are currently indexed.

What is the difference between a 10-K and a 20-F?

A 10-K is the annual report of a US domestic issuer, with sections fixed by law: Item 1 Business, Item 1A Risk Factors, Item 7 Management's Discussion and Analysis. A 20-F is filed by foreign private issuers — Taiwanese companies with US ADRs, such as TSMC, file 20-F rather than 10-K. A 40-F applies to Canadian issuers under the MJDS.

Are earnings call materials available here?

No. Earnings calls are not SEC filings, so US pages on this site cover annual reports only. Taiwan has a mandatory investor-conference disclosure regime, and those materials are indexed under Annual Reports.

Source: US Securities and Exchange Commission (SEC) EDGAR. This site indexes public filings and links to them; it hosts no copies, offers no investment advice, and makes no warranty as to timeliness or completeness.
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