0001703647 1 2026-01-27 2026-01-27 0001703647 2026-01-27 2026-01-27 0001703647 2 2026-01-27 2026-01-27 pure shares iso4217:USD N/A N/A 0001703647 EX-FILING FEES S-8 S-8 Korro Bio, Inc. false false Equity Common Stock, $0.001 par value per share true 470865 8.99 4233076.35 0.0001381 584.59 Equity Common Stock, $0.001 par value per share true 83231 7.64 635884.84 0.0001381 87.82 4868961.19 672.41 0 672.41 <div style="font-size:12pt;font-family:Times New Roman;"> <table style="margin-left:auto;border-spacing:0;table-layout:auto;width:100.0%;border-collapse:separate;margin-right:auto;"> <tr style="visibility:collapse;"> <td style="width:4%;box-sizing:content-box;"></td> <td style="width:96%;box-sizing:content-box;"></td> </tr> <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;text-align:left;"> <td style="padding-top:0.01in;padding-left:0in;vertical-align:top;padding-bottom:0in;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:14.15pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-kerning:none;min-width:fit-content;">(1)</span></p></td> <td style="padding-top:0.01in;padding-left:0in;vertical-align:top;padding-bottom:0in;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-kerning:none;min-width:fit-content;">Pursuant to Rule 416 under the Securities Act of 1933, as amended (the “Securities Act”), this Registration Statement on Form S-8 (“Registration Statement”) shall also cover any additional shares of common stock, $0.001 par value per share (the “Common Stock”) of Korro Bio, Inc. (the “Registrant”) that become issuable under the Korro Bio, Inc. 2023 Stock Option and Incentive Plan (the “2023 Plan”) and the Korro Bio, Inc. 2023 Employee Stock Purchase Plan (the “2023 ESPP”) by reason of any stock dividend, stock split, recapitalization or any other similar transactions.</span><span style="color:#000000;white-space:pre-wrap;font-kerning:none;min-width:fit-content;"> </span></p></td> </tr> </table></div> <table style="margin-left:auto;border-spacing:0;table-layout:auto;width:100.0%;border-collapse:separate;margin-right:auto;"> <tr style="visibility:collapse;"> <td style="width:4%;box-sizing:content-box;"></td> <td style="width:96%;box-sizing:content-box;"></td> </tr> <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;text-align:left;"> <td style="padding-top:0.01in;padding-left:0in;vertical-align:top;padding-bottom:0in;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:14.15pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-kerning:none;min-width:fit-content;">(4)</span></p></td> <td style="padding-top:0.01in;padding-left:0in;vertical-align:top;padding-bottom:0in;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-kerning:none;min-width:fit-content;">Represents an automatic increase of 83,231 shares of Common Stock available for issuance under the 2023 ESPP, effective as of January 1, 2026. Shares available for issuance under the 2023 ESPP were previously registered on a registration statement on Form S-8 (File No. 333-275354, File No. 333-278245 and File No. 333-285873) filed with the Securities and Exchange Commission on November 6, 2023, March 26, 2024 and March 18, 2025, respectively.</span></p></td> </tr> </table><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;font-kerning:none;min-width:fit-content;"> </span></p> <table style="margin-left:auto;border-spacing:0;table-layout:auto;width:100.0%;border-collapse:separate;margin-right:auto;"> <tr style="visibility:collapse;"> <td style="width:4%;box-sizing:content-box;"></td> <td style="width:96%;box-sizing:content-box;"></td> </tr> <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;text-align:left;"> <td style="padding-top:0.01in;padding-left:0in;vertical-align:top;padding-bottom:0in;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:14.15pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-kerning:none;min-width:fit-content;">(5)</span></p></td> <td style="padding-top:0.01in;padding-left:0in;vertical-align:top;padding-bottom:0in;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-kerning:none;min-width:fit-content;">Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457 of the Securities Act, and based on 85% (the percentage of the price per share applicable to purchases under the 2023 ESPP) of $7.64, the average of the high and low sale prices of the Common Stock as reported on Nasdaq on January 21, 2026 (such date being within five business days of the date that this Registration Statement was filed with the Commission.</span><span style="color:#000000;white-space:pre-wrap;font-kerning:none;min-width:fit-content;"> </span></p></td> </tr> </table> <table style="margin-left:auto;border-spacing:0;table-layout:auto;width:100.0%;border-collapse:separate;margin-right:auto;"> <tr style="visibility:collapse;"> <td style="width:4%;box-sizing:content-box;"></td> <td style="width:96%;box-sizing:content-box;"></td> </tr> <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;text-align:left;"> <td style="padding-top:0.01in;padding-left:0in;vertical-align:top;padding-bottom:0in;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:14.15pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-kerning:none;min-width:fit-content;">(1)</span></p></td> <td style="padding-top:0.01in;padding-left:0in;vertical-align:top;padding-bottom:0in;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-kerning:none;min-width:fit-content;">Pursuant to Rule 416 under the Securities Act of 1933, as amended (the “Securities Act”), this Registration Statement on Form S-8 (“Registration Statement”) shall also cover any additional shares of common stock, $0.001 par value per share (the “Common Stock”) of Korro Bio, Inc. (the “Registrant”) that become issuable under the Korro Bio, Inc. 2023 Stock Option and Incentive Plan (the “2023 Plan”) and the Korro Bio, Inc. 2023 Employee Stock Purchase Plan (the “2023 ESPP”) by reason of any stock dividend, stock split, recapitalization or any other similar transactions.</span><span style="color:#000000;white-space:pre-wrap;font-kerning:none;min-width:fit-content;"> </span></p></td> </tr> </table><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;font-kerning:none;min-width:fit-content;"> </span></p> <table style="margin-left:auto;border-spacing:0;table-layout:auto;width:100.0%;border-collapse:separate;margin-right:auto;"> <tr style="visibility:collapse;"> <td style="width:4%;box-sizing:content-box;"></td> <td style="width:96%;box-sizing:content-box;"></td> </tr> <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;text-align:left;"> <td style="padding-top:0.01in;padding-left:0in;vertical-align:top;padding-bottom:0in;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:14.15pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-kerning:none;min-width:fit-content;">(2)</span></p></td> <td style="padding-top:0.01in;padding-left:0in;vertical-align:top;padding-bottom:0in;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-kerning:none;min-width:fit-content;">Represents an automatic increase of 470,865 shares of Common Stock available for issuance under the 2023 Plan effective as of January 1, 2026. Shares available for issuance under the 2023 Plan were previously registered on registration statements on Form S-8 (File No. 333-275354, File No. 333-278245 and File No. 333-285873) filed with the Securities and Exchange Commission on November 6, 2023, March 26, 2024 and March 18, 2025, respectively.</span></p></td> </tr> </table><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:12pt;font-family:Times New Roman;font-kerning:none;min-width:fit-content;"> </span></p> <table style="margin-left:auto;border-spacing:0;table-layout:auto;width:100.0%;border-collapse:separate;margin-right:auto;"> <tr style="visibility:collapse;"> <td style="width:4%;box-sizing:content-box;"></td> <td style="width:96%;box-sizing:content-box;"></td> </tr> <tr style="height:10pt;word-break:break-word;white-space:pre-wrap;text-align:left;"> <td style="padding-top:0.01in;padding-left:0in;vertical-align:top;padding-bottom:0in;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:14.15pt;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-kerning:none;min-width:fit-content;">(3)</span></p></td> <td style="padding-top:0.01in;padding-left:0in;vertical-align:top;padding-bottom:0in;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-kerning:none;min-width:fit-content;">Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457 of the Securities Act, and based on $8.99, the average of the high and low sale prices of the Common Stock as reported on Nasdaq on January 21, 2026 (such date being within five business days of the date that this Registration Statement was filed with the Commission).</span></p></td> </tr> </table>