ADVENT TECHNOLOGIES HOLDINGS, INC. ADN (last ticker on record)

CIK 1744494Its SEC filings (opens in a new tab)

Restatement
95% wipeout
Delisting notice (not a red flag)

These figures describe clients, not conduct. A lawyer or firm can serve many companies that later had trouble for reasons that have nothing to do with their work, and nothing here says any lawyer or firm did anything wrong.

Red flags: 2; Newest began Apr 2023
Largest fall in its shares: 99%; Jan 2021 to Dec 2025
Law firms: 5; Linked to 5 or more companies
Lawyers: 7; Linked to 5 or more companies

What happened

Oct 29, 2025Delisting notice (Item 3.01)Form 8-K (opens in a new tab)
Aug 22, 2025Delisting notice (Item 3.01)Form 8-K (opens in a new tab)
May 27, 2025Delisting notice (Item 3.01)Form 8-K (opens in a new tab)
Apr 17, 2025Delisting notice (Item 3.01)Form 8-K (opens in a new tab)
Nov 27, 2024Delisting notice (Item 3.01)Form 8-K (opens in a new tab)
Oct 23, 2024Delisting notice (Item 3.01)Form 8-K (opens in a new tab)
Sep 5, 2024Delisting notice (Item 3.01)Form 8-K (opens in a new tab)
May 29, 2024Delisting notice (Item 3.01)Form 8-K (opens in a new tab)
Apr 23, 2024Delisting notice (Item 3.01)Form 8-K (opens in a new tab)
Nov 22, 2023Delisting notice (Item 3.01)Form 8-K (opens in a new tab)
May 26, 2023Delisting notice (Item 3.01)Form 8-K (opens in a new tab)
Apr 14, 2023Shares down 95% from their high
Jun 17, 2022Delisting notice (Item 3.01)Form 8-K (opens in a new tab)
May 7, 2021Said its accounts could not be relied on (Item 4.02)Form 8-K (opens in a new tab)
Jan 8, 2021Delisting notice (Item 3.01)Form 8-K (opens in a new tab)

An SEC release can name a company’s officer, or its stock as what a scheme sold or moved, so the company may be the victim. Each link goes to what to read.

Law firms

The ratios are about all the companies linked to each one, this one included: how many had that outcome, as a multiple of what comparable companies show. 1.00 means no more than expected.

Law firms linked to this company
Name	First linked	How it is known	Linked companies	SEC/DOJ scrutiny	Went dark	95% wipeout
Nutter McClennen & Fish	Jul 2025	Named in SEC correspondence	88	0.75	0.47	0.85
Manatt, Phelps & Phillips, LLP	Apr 2022	Named in SEC correspondence	169	0.88	0.82	1.25
Ropes & Gray	Nov 2020	Named in SEC correspondence	914	0.98	0.14	0.92
Ellenoff Grossman & Schole LLP	Jul 2018	Named in SEC correspondence	963	0.96	1.12	1.21
Skadden, Arps, Slate, Meagher & Flom LLP	Jul 2018	Named in SEC correspondence	2,607	1.15	0.19	0.85

Lawyers

The ratios are about all the companies linked to each one, this one included: how many had that outcome, as a multiple of what comparable companies show. 1.00 means no more than expected.

Lawyers linked to this company
Name	First linked	How it is known	Linked companies	SEC/DOJ scrutiny	Went dark	95% wipeout
Katherine J. BlairManatt, Phelps & Phillips, LLP	Apr 2022	Named in SEC correspondence	30	0.95	0.97	1.22
Carl MarcellinoRopes & Gray	Nov 2020	Named in SEC correspondence	32	0.41	0.00	1.22
Jeffrey W. RubinEllenoff Grossman & Schole LLP	Nov 2020	Named in SEC correspondence	33	1.98	0.00	1.46
Matthew A. GrayEllenoff Grossman & Schole LLP	Nov 2020	Named in a filing	42	1.43	0.00	1.45
Douglas S. EllenoffEllenoff Grossman & Schole LLP	Jul 2018	Named in SEC correspondence	338	0.95	0.66	0.95
Stuart NeuhauserEllenoff Grossman & Schole LLP	Jul 2018	Named in SEC correspondence	416	0.78	0.42	1.04
Paul D. TroppRopes & Gray	Nov 2020	Text search only	108	0.85	0.00	0.94