Hyliion Holdings Corp.

Symbol
HYLN on NYSE
Entity
Company
Business address
1202 Bmc Drive, Suite 100, 78613 Cedar Park, TX
Phone
(833) 495-4466
State of incorporation
DE
Fiscal year end
December 31
Category
Non-accelerated filer
Smaller reporting company
Former names
Tortoise Acquisition Corp. (to 9/28/2020)
All SEC filings
View on sec.gov
Get insider transactions for this issuer
Hyliion Holdings Corp. has filed 578 SEC EDGAR filings since 11/20/2018

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open Document Open Filing FORM 4 Nov 18, 2025 Nov 17, 2025
4 Open Document Open Filing FORM 4 Nov 18, 2025 Nov 17, 2025
4 Open Document Open Filing FORM 4 Nov 18, 2025 Nov 17, 2025
4/A Open Document Open Filing FORM 4/A Nov 18, 2025 Aug 25, 2025
4/A Open Document Open Filing FORM 4/A Nov 18, 2025 Aug 25, 2025
4/A Open Document Open Filing FORM 4/A Nov 18, 2025 Aug 25, 2025
4 Open Document Open Filing FORM 4 Nov 18, 2025 Nov 14, 2025
4 Open Document Open Filing FORM 4 Nov 17, 2025 Nov 13, 2025
4 Open Document Open Filing FORM 4 Nov 17, 2025 Nov 13, 2025
4 Open Document Open Filing FORM 4 Nov 17, 2025 Nov 13, 2025
4/A Open Document Open Filing FORM 4/A Nov 17, 2025 Aug 25, 2025
144 Open Document Open Filing Nov 17, 2025 001-38823
144 Open Document Open Filing Nov 17, 2025 001-38823
144 Open Document Open Filing Nov 17, 2025 001-38823
144 Open Document Open Filing Nov 17, 2025 001-38823
4 Open Document Open Filing FORM 4 Nov 14, 2025 Nov 12, 2025
10-Q Open Document | Data Open Filing 10-Q Nov 12, 2025 Sep 30, 2025 001-38823
8-K Open Document | Data Open Filing 8-K Nov 12, 2025 Nov 11, 2025 001-38823
4 Open Document Open Filing FORM 4 Nov 10, 2025 Nov 8, 2025
4 Open Document Open Filing FORM 4 Nov 6, 2025 Nov 6, 2025
SCHEDULE 13G/A Open Document Open Filing Oct 17, 2025 005-90949
4 Open Document Open Filing FORM 4 Sep 2, 2025 Sep 2, 2025
4 Open Document Open Filing FORM 4 Sep 2, 2025 Sep 2, 2025
4 Open Document Open Filing FORM 4 Aug 29, 2025 Aug 28, 2025
4 Open Document Open Filing FORM 4 Aug 29, 2025 Aug 27, 2025
4 Open Document Open Filing FORM 4 Aug 29, 2025 Aug 27, 2025
4 Open Document Open Filing FORM 4 Aug 25, 2025 Aug 25, 2025
4 Open Document Open Filing FORM 4 Aug 25, 2025 Aug 25, 2025
4 Open Document Open Filing FORM 4 Aug 25, 2025 Aug 25, 2025
4 Open Document Open Filing FORM 4 Aug 25, 2025 Aug 25, 2025
4 Open Document Open Filing FORM 4 Aug 21, 2025 Aug 21, 2025
4 Open Document Open Filing FORM 4 Aug 14, 2025 Aug 12, 2025
4 Open Document Open Filing FORM 4 Aug 14, 2025 Aug 12, 2025
4 Open Document Open Filing FORM 4 Aug 14, 2025 Aug 12, 2025
10-Q Open Document | Data Open Filing 10-Q Aug 12, 2025 Jun 30, 2025 001-38823
8-K Open Document | Data Open Filing 8-K Aug 12, 2025 Aug 12, 2025 001-38823
4 Open Document Open Filing FORM 4 Aug 8, 2025 Aug 8, 2025
4 Open Document Open Filing FORM 4 Aug 8, 2025 Aug 6, 2025
SD Open Document Open Filing SPECIALIZED DISCLOSURE REPORT May 30, 2025 001-38823
4 Open Document Open Filing FORM 4 May 28, 2025 May 28, 2025
4 Open Document Open Filing FORM 4 May 28, 2025 May 28, 2025
4 Open Document Open Filing FORM 4 May 28, 2025 May 28, 2025
4 Open Document Open Filing FORM 4 May 28, 2025 May 27, 2025
4 Open Document Open Filing FORM 4 May 28, 2025 May 27, 2025
4 Open Document Open Filing FORM 4 May 27, 2025 May 23, 2025
4 Open Document Open Filing FORM 4 May 27, 2025 May 23, 2025
4 Open Document Open Filing FORM 4 May 27, 2025 May 23, 2025
8-K Open Document | Data Open Filing CURRENT REPORT May 21, 2025 May 20, 2025 001-38823
4 Open Document Open Filing FORM 4 May 14, 2025 May 13, 2025
4 Open Document Open Filing FORM 4 May 14, 2025 May 13, 2025
4 Open Document Open Filing FORM 4 May 14, 2025 May 13, 2025
4 Open Document Open Filing FORM 4 May 14, 2025 May 13, 2025
4 Open Document Open Filing FORM 4 May 14, 2025 May 13, 2025
4 Open Document Open Filing FORM 4 May 14, 2025 May 13, 2025
4 Open Document Open Filing FORM 4 May 14, 2025 May 12, 2025
10-Q Open Document | Data Open Filing 10-Q May 13, 2025 Mar 31, 2025 001-38823
8-K Open Document | Data Open Filing 8-K May 13, 2025 May 13, 2025 001-38823
4 Open Document Open Filing FORM 4 May 8, 2025 May 8, 2025
DEF 14A Open Document | Data Open Filing DEF 14A Apr 8, 2025 May 20, 2025 001-38823
4 Open Document Open Filing FORM 4 Mar 26, 2025 Mar 26, 2025
4 Open Document Open Filing FORM 4 Mar 26, 2025 Mar 26, 2025
4 Open Document Open Filing FORM 4 Mar 26, 2025 Mar 26, 2025
4 Open Document Open Filing FORM 4 Mar 18, 2025 Mar 18, 2025
4 Open Document Open Filing FORM 4 Mar 6, 2025 Mar 5, 2025
4 Open Document Open Filing FORM 4 Mar 3, 2025 Feb 28, 2025
4 Open Document Open Filing FORM 4 Mar 3, 2025 Feb 28, 2025
4 Open Document Open Filing FORM 4 Mar 3, 2025 Feb 28, 2025
4 Open Document Open Filing FORM 4 Mar 3, 2025 Feb 28, 2025
4 Open Document Open Filing FORM 4 Mar 3, 2025 Feb 28, 2025
4 Open Document Open Filing FORM 4 Feb 27, 2025 Feb 27, 2025
4 Open Document Open Filing FORM 4 Feb 27, 2025 Feb 27, 2025
10-K Open Document | Data Open Filing 10-K Feb 25, 2025 Dec 31, 2024 001-38823
8-K Open Document | Data Open Filing 8-K Feb 25, 2025 Feb 25, 2025 001-38823
4 Open Document Open Filing FORM 4 Feb 20, 2025 Feb 18, 2025
4 Open Document Open Filing FORM 4 Feb 20, 2025 Feb 18, 2025
4 Open Document Open Filing FORM 4 Feb 20, 2025 Feb 18, 2025
4 Open Document Open Filing FORM 4 Feb 20, 2025 Feb 18, 2025
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4 Open Document Open Filing FORM 4 Feb 20, 2025 Feb 18, 2025
4 Open Document Open Filing FORM 4 Feb 20, 2025 Feb 18, 2025
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4 Open Document Open Filing FORM 4 Feb 20, 2025 Feb 18, 2025
4 Open Document Open Filing FORM 4 Feb 20, 2025 Feb 18, 2025
4 Open Document Open Filing FORM 4 Feb 20, 2025 Feb 18, 2025
4 Open Document Open Filing FORM 4 Feb 13, 2025 Feb 13, 2025
4 Open Document Open Filing FORM 4 Feb 13, 2025 Feb 13, 2025
4 Open Document Open Filing FORM 4 Feb 13, 2025 Feb 13, 2025
4 Open Document Open Filing FORM 4 Feb 13, 2025 Feb 13, 2025
4 Open Document Open Filing FORM 4 Feb 13, 2025 Feb 13, 2025
4 Open Document Open Filing FORM 4 Feb 13, 2025 Feb 13, 2025
4 Open Document Open Filing FORM 4 Feb 13, 2025 Feb 12, 2025
4 Open Document Open Filing FORM 4 Feb 10, 2025 Feb 8, 2025
4 Open Document Open Filing FORM 4 Dec 27, 2024 Dec 26, 2024
4 Open Document Open Filing FORM 4 Dec 27, 2024 Dec 26, 2024
4 Open Document Open Filing FORM 4 Dec 19, 2024 Dec 18, 2024
4 Open Document Open Filing FORM 4 Dec 12, 2024 Dec 11, 2024
4 Open Document Open Filing FORM 4 Dec 12, 2024 Dec 11, 2024
4 Open Document Open Filing FORM 4 Dec 12, 2024 Dec 11, 2024
4 Open Document Open Filing FORM 4 Dec 12, 2024 Dec 11, 2024
4 Open Document Open Filing FORM 4 Dec 12, 2024 Dec 11, 2024
4 Open Document Open Filing FORM 4 Dec 12, 2024 Dec 11, 2024
4 Open Document Open Filing FORM 4 Dec 12, 2024 Dec 11, 2024
4 Open Document Open Filing FORM 4 Dec 2, 2024 Nov 30, 2024
4 Open Document Open Filing FORM 4 Dec 2, 2024 Nov 30, 2024
4 Open Document Open Filing FORM 4 Nov 29, 2024 Nov 28, 2024
4 Open Document Open Filing FORM 4 Nov 29, 2024 Nov 28, 2024
4 Open Document Open Filing FORM 4 Nov 29, 2024 Nov 28, 2024
4 Open Document Open Filing FORM 4 Nov 29, 2024 Nov 27, 2024
4 Open Document Open Filing FORM 4 Nov 22, 2024 Nov 22, 2024
4 Open Document Open Filing FORM 4 Nov 20, 2024 Nov 20, 2024
4 Open Document Open Filing FORM 4 Nov 18, 2024 Nov 14, 2024
4 Open Document Open Filing FORM 4 Nov 18, 2024 Nov 14, 2024
4 Open Document Open Filing FORM 4 Nov 18, 2024 Nov 14, 2024
4 Open Document Open Filing FORM 4 Nov 18, 2024 Nov 14, 2024
4 Open Document Open Filing FORM 4 Nov 18, 2024 Nov 14, 2024
4 Open Document Open Filing FORM 4 Nov 18, 2024 Nov 14, 2024
4 Open Document Open Filing FORM 4 Nov 18, 2024 Nov 14, 2024
25 Open Document Open Filing FORM 25 Nov 15, 2024 001-38823
10-Q Open Document | Data Open Filing 10-Q Nov 14, 2024 Sep 30, 2024 001-38823
8-K Open Document | Data Open Filing 8-K Nov 14, 2024 Nov 14, 2024 001-38823
4 Open Document Open Filing FORM 4 Nov 8, 2024 Nov 8, 2024
CERT Open Document Open Filing NYSE AMERICAN CERTIFICATION Nov 6, 2024 001-38823
8-A12B Open Document Open Filing FOR REGISTRATION OF CERTAIN CLASSES Nov 6, 2024 001-38823
8-K Open Document | Data Open Filing 8-K Nov 5, 2024 Nov 5, 2024 001-38823
4 Open Document Open Filing FORM 4 Sep 27, 2024 Sep 26, 2024
4 Open Document Open Filing FORM 4 Sep 27, 2024 Sep 26, 2024
4 Open Document Open Filing FORM 4 Sep 18, 2024 Sep 18, 2024
4 Open Document Open Filing FORM 4 Sep 11, 2024 Sep 11, 2024
4 Open Document Open Filing FORM 4 Sep 3, 2024 Aug 31, 2024
4 Open Document Open Filing FORM 4 Sep 3, 2024 Aug 31, 2024
4 Open Document Open Filing FORM 4 Aug 28, 2024 Aug 28, 2024
4 Open Document Open Filing FORM 4 Aug 28, 2024 Aug 28, 2024
4 Open Document Open Filing FORM 4 Aug 28, 2024 Aug 28, 2024
4 Open Document Open Filing FORM 4 Aug 28, 2024 Aug 27, 2024
4 Open Document Open Filing FORM 4 Aug 28, 2024 Aug 27, 2024
4 Open Document Open Filing FORM 4 Aug 13, 2024 Aug 13, 2024
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4 Open Document Open Filing FORM 4 Aug 13, 2024 Aug 13, 2024
4 Open Document Open Filing FORM 4 Aug 13, 2024 Aug 13, 2024
4 Open Document Open Filing FORM 4 Aug 13, 2024 Aug 13, 2024
4 Open Document Open Filing FORM 4 Aug 8, 2024 Aug 8, 2024
4 Open Document Open Filing FORM 4 Aug 8, 2024 Aug 6, 2024
S-8 Open Document Open Filing REGISTRATION STATEMENT Aug 6, 2024 333-281305
10-Q Open Document | Data Open Filing 10-Q Aug 6, 2024 Jun 30, 2024 001-38823
8-K Open Document | Data Open Filing 8-K Aug 6, 2024 Aug 6, 2024 001-38823
4 Open Document Open Filing FORM 4 Jun 27, 2024 Jun 26, 2024
4 Open Document Open Filing FORM 4 Jun 27, 2024 Jun 26, 2024
4 Open Document Open Filing FORM 4 Jun 20, 2024 Jun 18, 2024
4 Open Document Open Filing FORM 4 Jun 17, 2024 Jun 12, 2024
4 Open Document Open Filing FORM 4 Jun 3, 2024 May 31, 2024
4 Open Document Open Filing FORM 4 Jun 3, 2024 May 31, 2024
SD Open Document Open Filing SPECIALIZED DISCLOSURE REPORT May 30, 2024 001-38823
4 Open Document Open Filing FORM 4 May 28, 2024 May 28, 2024
4 Open Document Open Filing FORM 4 May 28, 2024 May 28, 2024
4 Open Document Open Filing FORM 4 May 28, 2024 May 28, 2024
4 Open Document Open Filing FORM 4 May 28, 2024 May 27, 2024
4 Open Document Open Filing FORM 4 May 28, 2024 May 27, 2024
8-K Open Document | Data Open Filing 8-K May 23, 2024 May 21, 2024 001-38823
DEFA14A Open Document Open Filing DEFA14A May 15, 2024 001-38823
4 Open Document Open Filing FORM 4 May 13, 2024 May 10, 2024
144 Open Document Open Filing May 9, 2024 001-38823
10-Q Open Document | Data Open Filing 10-Q May 1, 2024 Mar 31, 2024 001-38823
8-K Open Document | Data Open Filing 8-K May 1, 2024 Apr 30, 2024 001-38823
DEF 14A Open Document Open Filing DEF 14A Apr 10, 2024 May 21, 2024 001-38823
8-K Open Document | Data Open Filing 8-K Apr 4, 2024 Apr 4, 2024 001-38823
4 Open Document Open Filing FORM 4 Mar 27, 2024 Mar 26, 2024
4 Open Document Open Filing FORM 4 Mar 27, 2024 Mar 26, 2024
4 Open Document Open Filing FORM 4 Mar 27, 2024 Mar 26, 2024
4 Open Document Open Filing FORM 4 Mar 18, 2024 Mar 18, 2024
144 Open Document Open Filing Mar 8, 2024 001-38823
144 Open Document Open Filing Mar 7, 2024 001-38823
8-K Open Document | Data Open Filing 8-K Mar 4, 2024 Mar 4, 2024 001-38823
4 Open Document Open Filing FORM 4 Feb 29, 2024 Feb 27, 2024
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4 Open Document Open Filing FORM 4 Feb 29, 2024 Sep 17, 2021
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4 Open Document Open Filing FORM 4 Feb 29, 2024 Feb 28, 2024
144 Open Document Open Filing Feb 21, 2024 001-38823
4 Open Document Open Filing FORM 4 Feb 15, 2024 Feb 13, 2024
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SC 13G/A Open Document Open Filing SCHEDULE 13G/A Feb 13, 2024 005-90949
8-K Open Document | Data Open Filing 8-K Feb 13, 2024 Feb 13, 2024 001-38823
10-K Open Document | Data Open Filing 10-K Feb 13, 2024 Dec 31, 2023 001-38823
8-K Open Document | Data Open Filing 8-K Feb 13, 2024 Feb 13, 2024 001-38823
4 Open Document Open Filing FORM 4 Feb 9, 2024 Feb 28, 2023
SC 13G/A Open Document Open Filing Jan 31, 2024 005-90949
4 Open Document Open Filing FORM 4 Dec 27, 2023 Dec 26, 2023
4 Open Document Open Filing FORM 4 Dec 27, 2023 Dec 26, 2023
8-K Open Document | Data Open Filing 8-K Dec 20, 2023 Dec 20, 2023 001-38823
4 Open Document Open Filing FORM 4 Dec 18, 2023 Dec 18, 2023
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10-Q Open Document | Data Open Filing 10-Q Nov 8, 2023 Sep 30, 2023 001-38823
8-K Open Document | Data Open Filing 8-K Nov 8, 2023 Nov 8, 2023 001-38823
8-K Open Document | Data Open Filing 8-K Oct 10, 2023 Oct 10, 2023 001-38823
4 Open Document Open Filing FORM 4 Sep 27, 2023 Sep 26, 2023
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10-Q Open Document | Data Open Filing 10-Q Aug 9, 2023 Jun 30, 2023 001-38823
8-K Open Document | Data Open Filing 8-K Aug 9, 2023 Aug 8, 2023 001-38823
4 Open Document Open Filing FORM 4 Jun 28, 2023 Jun 26, 2023
4 Open Document Open Filing FORM 4 Jun 28, 2023 Jun 26, 2023
8-K Open Document | Data Open Filing CURRENT REPORT Jun 27, 2023 Jun 27, 2023 001-38823
4 Open Document Open Filing FORM 4 Jun 22, 2023 Jun 20, 2023
4 Open Document Open Filing FORM 4 Jun 1, 2023 May 31, 2023
4 Open Document Open Filing FORM 4 Jun 1, 2023 May 31, 2023
4 Open Document Open Filing FORM 4 Jun 1, 2023 May 31, 2023
SD Open Document Open Filing SPECIALIZED DISCLOSURE REPORT May 30, 2023 001-38823
8-K Open Document | Data Open Filing 8-K May 25, 2023 May 23, 2023 001-38823
10-Q Open Document | Data Open Filing 10-Q May 9, 2023 Mar 31, 2023 001-38823
8-K Open Document | Data Open Filing 8-K May 9, 2023 May 9, 2023 001-38823
DEFA14A Open Document Open Filing DEFA14A Apr 10, 2023 001-38823
ARS Open Document Open Filing FORM ARS Apr 7, 2023 Dec 31, 2022 001-38823
DEF 14A Open Document | Data Open Filing DEF 14A Apr 7, 2023 001-38823
4 Open Document Open Filing Mar 28, 2023 Mar 26, 2023
4 Open Document Open Filing Mar 28, 2023 Mar 26, 2023
4 Open Document Open Filing Mar 28, 2023 Mar 26, 2023
4 Open Document Open Filing PRIMARY DOCUMENT Mar 21, 2023 Mar 17, 2023
4 Open Document Open Filing PRIMARY DOCUMENT Mar 21, 2023 Mar 17, 2023
4 Open Document Open Filing PRIMARY DOCUMENT Mar 21, 2023 Mar 17, 2023
4 Open Document Open Filing PRIMARY DOCUMENT Mar 21, 2023 Mar 18, 2023
4 Open Document Open Filing PRIMARY DOCUMENT Mar 21, 2023 Mar 17, 2023
3 Open Document Open Filing Mar 17, 2023 Mar 17, 2023
3 Open Document Open Filing Mar 17, 2023 Mar 17, 2023
3 Open Document Open Filing Mar 17, 2023 Mar 17, 2023
8-K Open Document | Data Open Filing CURRENT REPORT Mar 17, 2023 Mar 17, 2023 001-38823
4 Open Document Open Filing Mar 15, 2023 Mar 14, 2023
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8-K Open Document | Data Open Filing CURRENT REPORT Mar 8, 2023 Mar 6, 2023 001-38823
4 Open Document Open Filing FORM 4 Mar 2, 2023 Feb 28, 2023
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10-K Open Document | Data Open Filing 10-K Feb 28, 2023 Dec 31, 2022 001-38823
8-K Open Document | Data Open Filing 8-K Feb 28, 2023 Feb 28, 2023 001-38823
8-K Open Document | Data Open Filing 8-K Feb 21, 2023 Feb 17, 2023 001-38823
8-K Open Document | Data Open Filing 8-K Feb 14, 2023 Feb 13, 2023 001-38823
SC 13G/A Open Document Open Filing SCHEDULE 13G/A Feb 9, 2023 005-90949
SC 13G Open Document Open Filing Feb 3, 2023 005-90949
8-K Open Document | Data Open Filing 8-K Dec 21, 2022 Dec 21, 2022 001-38823
4 Open Document Open Filing Nov 21, 2022 Nov 18, 2022
4 Open Document Open Filing Nov 18, 2022 Nov 17, 2022
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4 Open Document Open Filing FORM 4 Nov 9, 2022 Nov 8, 2022
10-Q Open Document | Data Open Filing 10-Q Nov 9, 2022 Sep 30, 2022 001-38823
8-K Open Document | Data Open Filing 8-K Nov 9, 2022 Nov 8, 2022 001-38823
8-K Open Document | Data Open Filing CURRENT REPORT Sep 27, 2022 Sep 27, 2022 001-38823
4 Open Document Open Filing FORM 4 Sep 19, 2022 Sep 17, 2022
3 Open Document Open Filing FORM 3 Sep 19, 2022 Sep 12, 2022
8-K Open Document | Data Open Filing CURRENT REPORT Sep 12, 2022 Sep 12, 2022 001-38823
8-K Open Document | Data Open Filing CURRENT REPORT Aug 25, 2022 Aug 24, 2022 001-38823
10-Q Open Document | Data Open Filing 10-Q Aug 9, 2022 Jun 30, 2022 001-38823
8-K Open Document | Data Open Filing 8-K Aug 9, 2022 Aug 9, 2022 001-38823
4/A Open Document Open Filing FORM 4/A Jun 27, 2022 Feb 28, 2022
4 Open Document Open Filing FORM 4 Jun 27, 2022 Mar 26, 2022
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SD Open Document Open Filing SPECIALIZED DISCLOSURE REPORT May 27, 2022 001-38823
4 Open Document Open Filing May 20, 2022 May 19, 2022
8-K Open Document | Data Open Filing CURRENT REPORT May 20, 2022 May 19, 2022 001-38823
8-K Open Document | Data Open Filing 8-K May 13, 2022 May 10, 2022 001-38823
10-Q Open Document | Data Open Filing 10-Q May 9, 2022 Mar 31, 2022 001-38823
8-K Open Document | Data Open Filing 8-K May 9, 2022 May 9, 2022 001-38823
SC 13G Open Document Open Filing May 9, 2022 005-90949
4 Open Document Open Filing FORM 4 Apr 28, 2022 Apr 26, 2022
DEFA14A Open Document Open Filing DEFINITIVE ADDITIONAL MATERIALS Mar 25, 2022 001-38823
DEF 14A Open Document Open Filing DEFINITIVE PROXY STATEMENT Mar 25, 2022 May 10, 2022 001-38823
4 Open Document Open Filing Mar 3, 2022 Feb 28, 2022
3 Open Document Open Filing Mar 3, 2022 Feb 28, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 2, 2022 Feb 28, 2022
3 Open Document Open Filing OWNERSHIP DOCUMENT Mar 2, 2022 Feb 28, 2022
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4 Open Document Open Filing OWNERSHIP DOCUMENT Feb 28, 2022 Feb 28, 2022
4 Open Document Open Filing Feb 28, 2022 Feb 24, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Feb 28, 2022 Feb 28, 2022
4 Open Document Open Filing Feb 28, 2022 Feb 28, 2022
4 Open Document Open Filing Feb 28, 2022 Feb 28, 2022
10-K Open Document | Data Open Filing 10-K Feb 24, 2022 Dec 31, 2021 001-38823
8-K Open Document | Data Open Filing 8-K Feb 24, 2022 Feb 23, 2022 001-38823
SC 13G Open Document Open Filing SCHEDULE 13G Feb 10, 2022 005-90949
3 Open Document Open Filing Feb 7, 2022 Jan 28, 2022
SC 13G Open Document Open Filing Feb 4, 2022 005-90949
4 Open Document Open Filing Feb 4, 2022 Jul 19, 2021
4 Open Document Open Filing Feb 3, 2022 Feb 1, 2022
SC 13G/A Open Document Open Filing SC 13G/A Feb 2, 2022 005-90949
8-K Open Document | Data Open Filing CURRENT REPORT Feb 1, 2022 Jan 28, 2022 001-38823
SC 13G/A Open Document Open Filing SC 13G/A Feb 1, 2022 005-90949
424B3 Open Document Open Filing PROSPECTUS SUPPLEMENT Jan 28, 2022 333-249649
424B3 Open Document Open Filing PROSPECTUS Jan 5, 2022 333-249649
EFFECT Open Document Open Filing Jan 4, 2022 333-249649
POS AM Open Document | Data Open Filing POST-EFFECTIVE AMENDMENT NO. 2 TO FORM S-1 Dec 30, 2021 333-249649
4 Open Document Open Filing Dec 20, 2021 Dec 16, 2021
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SC 13D/A Open Document Open Filing Dec 6, 2021 005-90949
424B3 Open Document Open Filing 424B3 Nov 10, 2021 333-249649
10-Q Open Document | Data Open Filing 10-Q Nov 10, 2021 Sep 30, 2021 001-38823
8-K Open Document | Data Open Filing 8-K Nov 10, 2021 Nov 9, 2021 001-38823
4 Open Document Open Filing Nov 4, 2021 Nov 1, 2021
4 Open Document Open Filing Oct 22, 2021 Oct 20, 2021
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4 Open Document Open Filing Oct 12, 2021 Oct 11, 2021
4 Open Document Open Filing Oct 12, 2021 Oct 11, 2021
4 Open Document Open Filing Oct 5, 2021 Oct 1, 2021
4 Open Document Open Filing Oct 5, 2021 Sep 24, 2021
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4 Open Document Open Filing Sep 24, 2021 Sep 22, 2021
4 Open Document Open Filing Sep 22, 2021 Sep 20, 2021
SC 13D/A Open Document Open Filing Sep 22, 2021 005-90949
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424B3 Open Document Open Filing 424B3 Aug 26, 2021 333-249649
8-K Open Document | Data Open Filing 8-K Aug 26, 2021 Aug 24, 2021 001-38823
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424B3 Open Document Open Filing 424B3 Aug 24, 2021 333-249649
8-K Open Document | Data Open Filing 8-K Aug 24, 2021 Aug 19, 2021 001-38823
424B3 Open Document Open Filing 424B3 Aug 17, 2021 333-249649
3 Open Document Open Filing FORM 3 Aug 16, 2021 Aug 10, 2021
8-K Open Document | Data Open Filing 8-K Aug 16, 2021 Aug 10, 2021 001-38823
424B3 Open Document Open Filing 424B3 Aug 12, 2021 333-249649
10-Q/A Open Document | Data Open Filing 10-Q/A Aug 12, 2021 Jun 30, 2021 001-38823
424B3 Open Document Open Filing 424B3 Aug 11, 2021 333-249649
10-Q Open Document | Data Open Filing 10-Q Aug 11, 2021 Jun 30, 2021 001-38823
8-K Open Document | Data Open Filing 8-K Aug 11, 2021 Aug 10, 2021 001-38823
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4 Open Document Open Filing FORM 4 Aug 2, 2021 Jul 29, 2021
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424B3 Open Document Open Filing PROSPECTUS Jul 15, 2021 333-249649
EFFECT Open Document Open Filing Jul 14, 2021 333-249649
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4/A Open Document Open Filing FORM 4/A Jul 7, 2021 Jun 30, 2021
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4 Open Document Open Filing FORM 4 Jun 29, 2021 Jun 25, 2021
8-K Open Document Open Filing 8-K Jun 14, 2021 Jun 8, 2021 001-38823
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4 Open Document Open Filing FORM 4 Jun 3, 2021 Jun 1, 2021
SD Open Document Open Filing SD Jun 1, 2021 001-38823
4 Open Document Open Filing FORM 4 May 26, 2021 May 25, 2021
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424B3 Open Document Open Filing 424B3 May 24, 2021 333-249649
SC 13D/A Open Document Open Filing May 24, 2021 005-90949
4 Open Document Open Filing May 21, 2021 May 19, 2021
4 Open Document Open Filing May 21, 2021 May 19, 2021
4 Open Document Open Filing May 20, 2021 May 18, 2021
424B3 Open Document Open Filing 424B3 May 17, 2021 333-249649
424B3 Open Document Open Filing PROSPECTUS SUPPLEMENT May 17, 2021 333-249649
10-Q Open Document | Data Open Filing 10-Q May 17, 2021 Mar 31, 2021 001-38823
10-K/A Open Document | Data Open Filing AMENDMENT NO. 1 TO FORM 10-K May 17, 2021 Dec 31, 2020 001-38823
8-K Open Document Open Filing CURRENT REPORT May 12, 2021 May 11, 2021 001-38823
424B3 Open Document Open Filing PROSPECTUS SUPPLEMENT May 11, 2021 333-249649
424B3 Open Document Open Filing PROSPECTUS SUPPLEMENT May 11, 2021 333-249649
8-K Open Document Open Filing CURRENT REPORT May 11, 2021 May 10, 2021 001-38823
424B3 Open Document Open Filing 424B3 Apr 30, 2021 333-249649
4 Open Document Open Filing Apr 29, 2021 Apr 16, 2021
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8-K Open Document Open Filing CURRENT REPORT Apr 7, 2021 Apr 7, 2021 001-38823
8-K Open Document Open Filing CURRENT REPORT Apr 1, 2021 Mar 26, 2021 001-38823
424B3 Open Document Open Filing PROSPECTUS SUPPLEMENT Mar 31, 2021 333-249649
4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 30, 2021 Mar 26, 2021
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4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 30, 2021 Mar 26, 2021
4 Open Document Open Filing Mar 30, 2021 Mar 26, 2021
4 Open Document Open Filing Mar 30, 2021 Mar 26, 2021
4 Open Document Open Filing Mar 30, 2021 Mar 26, 2021
4 Open Document Open Filing Mar 30, 2021 Mar 26, 2021
4 Open Document Open Filing Mar 4, 2021 Mar 2, 2021
SC 13G/A Open Document Open Filing SC 13G/A Mar 2, 2021 005-90949
424B3 Open Document Open Filing PROSPECTUS SUPPLEMENT Feb 26, 2021 333-249649
10-K Open Document | Data Open Filing ANNUAL REPORT Feb 26, 2021 Dec 31, 2020 001-38823
8-K Open Document Open Filing CURRENT REPORT Feb 24, 2021 Feb 23, 2021 001-38823
SC 13G Open Document Open Filing Feb 16, 2021 005-90949
SC 13G/A Open Document Open Filing SCHEDULE 13G HOLDINGS REPORT AMENDMENT Feb 16, 2021 005-90949
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SC 13G/A Open Document Open Filing KARPUS INVESTMENT MGT / HYLIION HOLDINGS (FKA TORTOISE ACQUISITION CORP) - SCHED Feb 12, 2021 005-90949
SC 13G/A Open Document Open Filing AMENDMENT NO. 1 TO SCHEDULE 13G Feb 11, 2021 005-90949
SC 13G/A Open Document Open Filing HYLIION HOLDINGS CORP. Feb 11, 2021 005-90949
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3 Open Document Open Filing FORM 3 SUBMISSION Jan 27, 2021 Jan 22, 2021
8-K Open Document Open Filing CURRENT REPORT Jan 22, 2021 Jan 15, 2021 001-38823
4 Open Document Open Filing FORM 4 SUBMISSION Jan 20, 2021 Jan 15, 2021
8-K Open Document Open Filing CURRENT REPORT Jan 12, 2021 Jan 8, 2021 001-38823
25-NSE Open Document Open Filing Dec 30, 2020 001-38823
4 Open Document Open Filing FORM 4 SUBMISSION Dec 29, 2020 Dec 29, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Dec 28, 2020 Dec 23, 2020
S-8 Open Document Open Filing REGISTRATION STATEMENT Dec 14, 2020 333-251328
8-K Open Document Open Filing CURRENT REPORT Dec 7, 2020 Dec 2, 2020 001-38823
3/A Open Document Open Filing FORM 3/A SUBMISSION Dec 2, 2020 Nov 16, 2020
8-K Open Document Open Filing CURRENT REPORT Nov 30, 2020 Nov 30, 2020 001-38823
EFFECT Open Document Open Filing Nov 27, 2020 333-249649
3 Open Document Open Filing FORM 3 SUBMISSION Nov 27, 2020 Oct 16, 2020
424B3 Open Document Open Filing Nov 27, 2020 333-249649
CORRESP Open Document Open Filing Nov 24, 2020
CORRESP Open Document Open Filing Nov 23, 2020
S-1/A Open Document | Data Open Filing REGISTRATION STATEMENT Nov 23, 2020 333-249649
CORRESP Open Document Open Filing Nov 20, 2020
UPLOAD Open Document Open Filing Nov 13, 2020
8-K/A Open Document Open Filing AMENDMENT NO.2 TO CURRENT REPORT Nov 12, 2020 Nov 12, 2020 001-38823
10-Q Open Document | Data Open Filing QUARTERLY REPORT Nov 12, 2020 Sep 30, 2020 001-38823
8-K Open Document Open Filing CURRENT REPORT Nov 12, 2020 Nov 12, 2020 001-38823
8-K Open Document Open Filing CURRENT REPORT Oct 29, 2020 Oct 23, 2020 001-38823
S-1 Open Document | Data Open Filing REGISTRATION STATEMENT Oct 23, 2020 333-249649
SC 13G Open Document Open Filing SC 13G Oct 21, 2020 005-90949
SC 13D Open Document Open Filing Oct 13, 2020 005-90949
SC 13G Open Document Open Filing SC 13G Oct 13, 2020 005-90949
SC 13D Open Document Open Filing SC 13D Oct 9, 2020 005-90949
3 Open Document Open Filing FORM 3 SUBMISSION Oct 7, 2020 Oct 1, 2020
3 Open Document Open Filing FORM 3 SUBMISSION Oct 7, 2020 Oct 1, 2020
8-K/A Open Document Open Filing AMENDMENT NO. 1 TO FORM 8-K Oct 7, 2020 Oct 1, 2020 001-38823
8-K Open Document Open Filing CURRENT REPORT Oct 7, 2020 Oct 1, 2020 001-38823
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 5, 2020 Oct 2, 2020
4 Open Document Open Filing Oct 5, 2020 Oct 2, 2020
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 5, 2020 Oct 1, 2020
4 Open Document Open Filing Oct 5, 2020 Oct 1, 2020
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 5, 2020 Oct 1, 2020
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 5, 2020 Oct 1, 2020
4 Open Document Open Filing Oct 5, 2020 Oct 1, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Oct 5, 2020 Oct 1, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Oct 5, 2020 Oct 1, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Oct 5, 2020 Oct 1, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Oct 5, 2020 Oct 1, 2020
4 Open Document Open Filing FORM 4 SUBMISSION Oct 5, 2020 Oct 1, 2020
3 Open Document Open Filing FORM 3 SUBMISSION Oct 5, 2020 Oct 1, 2020
3 Open Document Open Filing FORM 3 SUBMISSION Oct 5, 2020 Oct 1, 2020
3 Open Document Open Filing FORM 3 SUBMISSION Oct 5, 2020 Oct 1, 2020
3 Open Document Open Filing FORM 3 SUBMISSION Oct 5, 2020 Oct 1, 2020
3 Open Document Open Filing FORM 3 SUBMISSION Oct 5, 2020 Oct 1, 2020
3 Open Document Open Filing FORM 3 SUBMISSION Oct 5, 2020 Oct 1, 2020
3 Open Document Open Filing FORM 3 SUBMISSION Oct 5, 2020 Oct 1, 2020
25-NSE Open Document Open Filing Oct 2, 2020 001-38823
8-K Open Document Open Filing CURRENT REPORT Oct 1, 2020 Sep 28, 2020 001-38823
DEFA14A Open Document Open Filing DEFINITIVE ADDITIONAL MATERIALS Sep 28, 2020 001-38823
DEFA14A Open Document Open Filing DEFINITIVE ADDITIONAL MATERIALS Sep 28, 2020 001-38823
8-K Open Document Open Filing CURRENT REPORT Sep 28, 2020 Sep 28, 2020 001-38823
DEFA14A Open Document Open Filing DEFINITIVE ADDITIONAL MATERIALS Sep 28, 2020 001-38823
DEFA14A Open Document Open Filing DEFINITIVE ADDITIONAL MATERIALS Sep 25, 2020 001-38823
DEFA14A Open Document Open Filing DEFINITIVE ADDITIONAL MATERIALS Sep 24, 2020 001-38823
8-K Open Document Open Filing CURRENT REPORT Sep 24, 2020 Sep 24, 2020 001-38823
DEFA14A Open Document Open Filing DEFINITIVE ADDITIONAL MATERIALS Sep 21, 2020 001-38823
DEFA14A Open Document Open Filing DEFINITIVE ADDITIONAL MATERIALS Sep 17, 2020 001-38823
DEFA14A Open Document Open Filing DEFINITIVE ADDITIONAL MATERIALS Sep 15, 2020 001-38823
DEFA14A Open Document Open Filing DEFINITIVE ADDITIONAL MATERIALS Sep 10, 2020 001-38823
DEFA14A Open Document Open Filing DEFINITIVE ADDITIONAL MATERIALS Sep 10, 2020 001-38823
UPLOAD Open Document Open Filing Sep 8, 2020
DEFM14A Open Document Open Filing Sep 8, 2020 001-38823
CORRESP Open Document Open Filing Aug 31, 2020
PRER14A Open Document Open Filing AMENDMENT NO. 2 TO PRELIMINARY PROXY STATEMENT Aug 31, 2020 001-38823
UPLOAD Open Document Open Filing Aug 26, 2020
PRER14A Open Document Open Filing REVISED PRELIMINARY PROXY STATEMENT Aug 14, 2020 001-38823
CORRESP Open Document Open Filing Aug 13, 2020
UPLOAD Open Document Open Filing Aug 6, 2020
10-Q Open Document | Data Open Filing QUARTERLY REPORT Aug 6, 2020 Jun 30, 2020 001-38823
DEFA14A Open Document Open Filing SOLICITING MATERIAL UNDER 240.14A-12 Jul 30, 2020 001-38823
DEFA14A Open Document Open Filing SOLICITING MATERIAL UNDER 240.14A-12 Jul 29, 2020 001-38823
DEFA14A Open Document Open Filing SOLICITING MATERIAL UNDER 240.14A-12 Jul 21, 2020 001-38823
PREM14A Open Document Open Filing FORM PREM14A Jul 10, 2020 Jul 10, 2020 001-38823
SC 13G/A Open Document Open Filing FORM SC 13G/A Jul 10, 2020 005-90949
DEFA14A Open Document Open Filing SOLICITING MATERIAL UNDER 240.14A-12 Jun 25, 2020 001-38823
4 Open Document Open Filing STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Jun 23, 2020 Jun 19, 2020
8-K Open Document Open Filing CURRENT REPORT Jun 19, 2020 Jun 18, 2020 001-38823
DEFA14A Open Document Open Filing CURRENT REPORT Jun 19, 2020 001-38823
10-Q Open Document | Data Open Filing QUARTERLY REPORT May 7, 2020 Mar 31, 2020 001-38823
SC 13G Open Document Open Filing FORM SC 13G Apr 10, 2020 005-90949
3 Open Document Open Filing INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Apr 3, 2020 Mar 26, 2020
10-K Open Document | Data Open Filing ANNUAL REPORT Mar 23, 2020 Dec 31, 2019 001-38823
SC 13G/A Open Document Open Filing AQR CAPITAL MANAGEMENT LLC Feb 18, 2020 005-90949
SC 13G/A Open Document Open Filing AMENDMENT NO. 1 TO SCHEDULE 13G Feb 14, 2020 005-90949
SC 13G Open Document Open Filing Feb 14, 2020 005-90949
SC 13G/A Open Document Open Filing AMENDMENT NO. 1 TO SCHEDULE 13G Feb 14, 2020 005-90949
SC 13G Open Document Open Filing Feb 14, 2020 005-90949
SC 13G Open Document Open Filing SCHEDULE 13G Feb 13, 2020 005-90949
SC 13G/A Open Document Open Filing TORTOISE ACQUISITION CORP. Feb 13, 2020 005-90949
8-K Open Document Open Filing CURRENT REPORT Jan 24, 2020 Jan 23, 2020 001-38823
10-Q Open Document | Data Open Filing QUARTERLY REPORT Nov 12, 2019 Sep 30, 2019 001-38823
10-Q Open Document | Data Open Filing QUARTERLY REPORT Aug 12, 2019 Jun 30, 2019 001-38823
10-Q Open Document | Data Open Filing QUARTERLY REPORT May 13, 2019 Mar 31, 2019 001-38823
4 Open Document Open Filing May 6, 2019 Mar 7, 2019
8-K Open Document Open Filing CURRENT REPORT Apr 19, 2019 Apr 19, 2019 001-38823
SC 13G Open Document Open Filing TORTOISE ACQUISITION CORP. Mar 11, 2019 005-90949
SC 13G Open Document Open Filing SC 13G Mar 11, 2019 005-90949
SC 13G Open Document Open Filing TORTOISE ACQUISITION CORP. Mar 11, 2019 005-90949
8-K Open Document Open Filing CURRENT REPORT Mar 8, 2019 Mar 4, 2019 001-38823
SC 13G Open Document Open Filing AQR CAPITAL MANAGEMENT LLC Mar 8, 2019 005-90949
SC 13G Open Document Open Filing SC 13G Mar 7, 2019 005-90949
4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 6, 2019 Mar 4, 2019
4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 6, 2019 Mar 4, 2019
4 Open Document Open Filing Mar 6, 2019 Mar 4, 2019
4 Open Document Open Filing Mar 6, 2019 Mar 4, 2019
4 Open Document Open Filing Mar 6, 2019 Mar 4, 2019
4 Open Document Open Filing Mar 6, 2019 Mar 4, 2019
4 Open Document Open Filing Mar 6, 2019 Mar 4, 2019
4 Open Document Open Filing Mar 6, 2019 Mar 4, 2019
4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 6, 2019 Mar 4, 2019
8-K Open Document Open Filing CURRENT REPORT Mar 5, 2019 Feb 27, 2019 001-38823
424B4 Open Document Open Filing PROSPECTUS Mar 1, 2019 333-229537
EFFECT Open Document Open Filing Feb 27, 2019 333-229537
3 Open Document Open Filing Feb 27, 2019 Feb 27, 2019
3 Open Document Open Filing Feb 27, 2019 Feb 27, 2019
3 Open Document Open Filing Feb 27, 2019 Feb 27, 2019
3 Open Document Open Filing Feb 27, 2019 Feb 27, 2019
3 Open Document Open Filing Feb 27, 2019 Feb 27, 2019
3 Open Document Open Filing Feb 27, 2019 Feb 27, 2019
3 Open Document Open Filing Feb 27, 2019 Feb 27, 2019
3 Open Document Open Filing Feb 27, 2019 Feb 27, 2019
3 Open Document Open Filing Feb 27, 2019 Feb 27, 2019
CERT Open Document Open Filing NYSE CERTIFICATION FILING-- TORTOISE ACQUISITION CORP. Feb 27, 2019 001-38823
8-A12B Open Document Open Filing REGISTRATION OF CERTAIN CLASSES OF SECURITIES Feb 27, 2019 001-38823
CORRESP Open Document Open Filing Feb 25, 2019
CORRESP Open Document Open Filing Feb 25, 2019
S-1/A Open Document Open Filing AMENDMENT TO FORM S-1 Feb 15, 2019 333-229537
S-1 Open Document Open Filing REGISTRATION STATEMENT Feb 6, 2019 333-229537
DRSLTR Open Document Open Filing Dec 21, 2018
DRS/A Open Document Open Filing Dec 21, 2018 377-02379
UPLOAD Open Document Open Filing Dec 17, 2018
DRS Open Document Open Filing Nov 20, 2018 377-02379