Advent Technologies Holdings, Inc.
Advent Technologies Holdings, Inc. (ADNWW) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ADNWW · as of Sep 30, 2025
Ownership Breakdown
6
Institutional Holders
▼ 2 vs Q2
$46,689
Total Inst. Value
▲ $26,587 vs Q2
2.72M
Shares Outstanding
freeFloat 90.27%
3.36M
13F Shares Held
▼ 215,828 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ADNWW largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 9 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
LMR PARTNERS LLP miscellaneous electrical machinery, equipment & supplies | 3.16M | 118.51% | 118.51% | $43.90M | Nov 14, 2025 | — held |
TORONTO DOMINION BANK miscellaneous electrical machinery, equipment & supplies | 92.0K | 3.45% | 3.45% | $1.29M | Nov 14, 2025 | ▼ 506 |
PINE VALLEY INVESTMENTS LTD LIABILITY CO miscellaneous electrical machinery, equipment & supplies | 40.0K | 1.50% | 1.50% | $556,000 | Feb 17, 2026 | — held |
WOLVERINE ASSET MANAGEMENT LLC miscellaneous electrical machinery, equipment & supplies | 30.6K | 1.15% | 1.15% | $424,000 | Oct 28, 2025 | ▼ 7.5K |
PEAK6 LLC miscellaneous electrical machinery, equipment & supplies | 25.2K | 94.50% | 94.50% | $350,000 | Mar 31, 2026 | — held |
CITADEL ADVISORS LLC miscellaneous electrical machinery, equipment & supplies | 12.1K | 45.29% | 45.29% | $168,000 | Nov 14, 2025 | NEW |
SUSQUEHANNA INTERNATIONAL GROUP, LLP miscellaneous electrical machinery, equipment & supplies | 0 | 0.00% | 0.00% | $0 | Nov 14, 2025 | EXIT |
UBS GROUP AG miscellaneous electrical machinery, equipment & supplies | 0 | 0.00% | 0.00% | $0 | Nov 13, 2025 | EXIT |
MAN GROUP PLC miscellaneous electrical machinery, equipment & supplies | 0 | 0.00% | 0.00% | $0 | Nov 14, 2025 | EXIT |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
0
Increased
+0 shares1
New Positions
first time holders2
Decreased
−8.0K shares3
Sold Out
fully exitedNet shares change (top 50)
8.0K
+0 / −8.0K
Net new holders
-4
1 new / 3 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ADNWW insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
2
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Hussain Naiem Chief Financial Officer | Feb 15, 2024 | Award | 166,779 | — | — | 251.8K | Form 4 ↗ |
Hussain Naiem Chief Financial Officer | Feb 15, 2024 | Award | 166,779 | $0.17 | $27.5K | 166.8K | Form 4 ↗ |
Gregoriou Vassilios CEO, Chair | Sep 6, 2023 | Sale | 14,157 | $0.53 | $7.5K | 6.37M | Form 4 ↗ |
Brackman Kevin L. CFO | Sep 6, 2023 | Sale | 27,771 | $0.53 | $14.7K | 176.5K | Form 4 ↗ |
Gregoriou Vassilios CEO, Chair | Feb 6, 2023 | Sale | 18,642 | $2.00 | $37.3K | 6.44M | Form 4 ↗ |
Gregoriou Vassilios CEO, Chair | Feb 7, 2023 | Sale | 34,338 | $1.96 | $67.3K | 6.40M | Form 4 ↗ |
Gregoriou Vassilios CEO, Chair | Feb 8, 2023 | Sale | 22,696 | $1.92 | $43.5K | 6.38M | Form 4 ↗ |
GOURDOUPI PANORAIA director | Jan 12, 2023 | Award | 4,688 | — | — | 379.5K | Form 4 ↗ |
Kaskavelis Christos CMO | Jun 11, 2021 | Award | 345,794 | — | — | 2.25M | Form 4 ↗ |
Gregoriou Vassilios CEO, Chair | Feb 6, 2023 | Sale | 18,642 | $2.00 | $37.3K | 6.54M | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Advent Technologies Holdings, Inc. (ADNWW) is primarily owned by institutional investors, who hold approximately 100.0% of total shares outstanding. Company insiders own approximately 9.73%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Advent Technologies Holdings, Inc. is LMR PARTNERS LLP, holding approximately 3.16 million shares — equal to 118.51% of outstanding shares — as of September 30, 2025.
A total of 6 institutional investors currently hold ADNWW stock, with a combined institutional value of approximately $46,689 as of the most recent 13F filing period.
Frequently asked questions
ADNWW ownershipAdvent Technologies Holdings, Inc. (ADNWW) is primarily owned by institutional investors, who hold approximately 100.0% of shares. The largest shareholder is LMR PARTNERS LLP with a 118.51% stake. Company insiders hold 9.73%. Data sourced from SEC Form 13F as of September 30, 2025.