SEC Form 4
Tsakos Energy Navigation Ltd. (TEN) insider trading
In the 12 months to Oct 24, 2026, 4 TEN insiders reported open-market sales of $1.1M across 4 filings; one chief executive officer bought $998.3K.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $1.1M
- 4 filings · 4 insiders
- Open-market purchases
- $998.3K
- 1 filing · Nikolaos Tsakos, Chief Executive Officer
Who traded TEN, and when
- Purchase
- Sale
TEN daily close from Oct 24, 2025 to Oct 23, 2026, between $21.71 and $56.40, last $53.48. 4 sale and 1 purchase filings by 5 insiders, marked at their filing dates. Nikolaos Tsakos, Chief Executive Officer: bought $998.3K across 1 filing, first filed Apr 30, 2026, last Apr 30, 2026. Theoharrys Evgenios Kosmatos, CFO and CAO: sold $530.0K across 1 filing, first filed Sep 22, 2026, last Sep 22, 2026. Georgios Saroglou, President and COO: sold $266.0K across 1 filing, first filed Oct 14, 2026, last Oct 14, 2026. Clio Hatzimichalis, Director: sold $205.3K across 1 filing, first filed Aug 17, 2026, last Aug 17, 2026. Nicholas Francis Tommasino, Director: sold $99.8K across 1 filing, first filed Jul 16, 2026, last Jul 16, 2026.
Largest mark · tap a row for others
Nikolaos Tsakos · Chief Executive Officer
Purchase $998,341
25,000 shares at $39.93 avg
Filed Apr 30, 2026 · traded Apr 28
Close on filing date $40.68
Nikolaos Tsakos · Chief Executive Officer
Chief Executive Officer
$998.3K boughtTheoharrys Evgenios Kosmatos · CFO and CAO
CFO and CAO
$530.0K soldGeorgios Saroglou · President and COO
President and COO
$266.0K soldClio Hatzimichalis · Director
Director
$205.3K soldNicholas Francis Tommasino · Director
Director
$99.8K soldHas Tsakos Energy Navigation Ltd.'s CEO sold stock?
No. Nikolaos Tsakos (CEO) made no open-market sales filed as CEO in the last 12 months.
Open-market trades
5 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Nikolaos Tsakos | Chief Executive Officer | — | $998.3K | 1 | — | |
| Theoharrys Evgenios Kosmatos | CFO and CAO | $530.0K | — | 1 | — | |
| Georgios Saroglou | President and COO | $266.0K | — | 1 | — | |
| Clio Hatzimichalis | Director | $205.3K | — | 1 | — | |
| Nicholas Francis Tommasino | Director | $99.8K | — | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Georgios Saroglou President and COO | Sale | 5,000 | $53.20 | $266.0K | 37,000 | |
traded | Theoharrys Evgenios Kosmatos CFO and CAO | Sale | 10,000 | $53.00 | $530.0K | 14,700 | |
traded | Clio Hatzimichalis Director | Sale | 5,000 | $41.07 | $205.3K | 5,000 | |
traded | Nicholas Francis Tommasino Director | Sale | 2,490 | $40.07 | $99.8K | 2,874 | |
traded | Nikolaos Tsakos Chief Executive Officer | Purchase | 25,000 | $39.93 | $998.3K | 918,500 |
GET /stocks/filings/vX/form-4?tickers=TEN&filing_date.gte=2025-10-24&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"TEN",
"TENpE",
"TENpF",
"TNP",
"TNPpE",
"TNPpF"
],
"issuer_cik": "0001166663",
"owner_cik": "0002052945",
"accession_number": "0001193125-26-421684",
"form_type": "4",
"filing_date": "2026-10-14",
"period_of_report": "2026-10-12",
"issuer_name": "TSAKOS ENERGY NAVIGATION LTD",
"issuer_trading_symbol": "TEN",
"owner_name": "Saroglou Georgios",
"is_director": true,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "President and COO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Shares",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-10-12",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 5000,
"transaction_price_per_share": 53.2,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 37000,
"transaction_value": 266000,
"direct_or_indirect": "D"
},
{
"tickers": [
"TEN",
"TENpE",
"TENpF",
"TNP",
"TNPpE",
"TNPpF"
],
"issuer_cik": "0001166663",
"owner_cik": "0002120925",
"accession_number": "0001193125-26-397932",
"form_type": "4",
"filing_date": "2026-09-22",
"period_of_report": "2026-09-18",
"issuer_name": "TSAKOS ENERGY NAVIGATION LTD",
"issuer_trading_symbol": "TEN",
"owner_name": "Kosmatos Theoharrys Evgenios",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "CFO and CAO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Shares",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-09-18",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 10000,
"transaction_price_per_share": 53.0014,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 14700,
"transaction_value": 530014,
"direct_or_indirect": "D"
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 2 records
- Gifts2 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for TEN every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.