Scan date: April 9, 2026 | Window: April 7–8, 2026 | Signal threshold: $1,000,000+
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This report covers the past two business days of SEC Form 4 insider filing activity across eight tanker stocks: FRO, INSW, STNG, DHT, HAFN, TNK, EURN, and ASC. For each name you’ll find what was filed (or not filed), what it implies for investors, and why the result looks the way it does. The most important structural fact about this watchlist: seven of the eight companies are Foreign Private Issuers (FPIs) exempt from SEC insider reporting. Form 4 monitoring tools return blank results for those names by design — not because nothing is happening.
FRO — Frontline plc ▶ NO FORM 4 — FPI EXEMPT
What Happened: No SEC Form 4 insider transaction was filed for Frontline in the past two business days, nor are any on record for April 2026. The most recent SEC filings are a 20-F annual report (March 27) and a 6-K current report (March 30). Separately, major shareholder Hemen Holding (Fredriksen group) disclosed a 35.6% stake and a new cash-settled total return swap on 3 million notional shares via a 13D/A amendment on March 27.
What It Implies: Neutral on insider signal — but the 13D/A activity from the Fredriksen group is worth noting. The new total return swap suggests continued synthetic exposure to FRO even as the group manages its direct position. No clear directional signal from insiders via the U.S. reporting channel this week.
Why This Happens: Frontline is a Foreign Private Issuer (FPI) incorporated in Cyprus and listed on both the NYSE and Oslo Stock Exchange. Under SEC rules, FPIs are fully exempt from Section 16 reporting, meaning officers and directors are never required to file Form 4. Insider activity at Frontline shows up through Oslo Stock Exchange mandatory notifications and voluntary 6-K filings — not through EDGAR’s Form 4 database. Any OpenInsider search for FRO will return no results, by design.
INSW — International Seaways ▶ BEARISH — INSIDER SELLING
What Happened: No new Form 4 filings were found in the past two business days (April 7–8). However, March 2026 saw significant insider activity. The Fredriksen-linked entity C.K. Ltd / Famatown Finance sold 456,362 shares on March 9 at an average of $75.52, generating $34,464,188 in proceeds. A 13D/A was filed March 12 confirming the group reduced its stake to approximately 15.80%. CAO James D. Small III sold 20,000 shares on March 4 at $75.38 ($1,507,500), representing a 35% reduction in his position. CEO Lois Zabrocky sold 2,000 shares on March 16 at $67.79 ($135,578). Total insider sales over the past 90 days: approximately 507,580 shares worth $38.2 million. No insider purchases recorded.
What It Implies: Bearish. The Fredriksen group’s $34.5 million block reduction is the most significant signal. These sales occurred at $75–76 per share, well above where INSW now trades in the mid-$60s, suggesting major holders were reducing exposure at prices they found attractive. The CAO’s 35% position reduction is also notable. The cluster of selling across multiple insider tiers — 10% owner, CAO, and CEO — in the same month reinforces the directional read. No offsetting purchases were recorded.
Why This Happens: INSW is a U.S.-incorporated domestic issuer and the only company on this watchlist that files Form 4 with the SEC. The Fredriksen group holds significant positions across multiple tanker names and periodically rebalances between them. The March selling may reflect a shift of capital toward FRO or other holdings, a view on INSW’s near-term earnings trajectory as tanker rates softened, or portfolio management after a strong run-up in INSW shares from much lower levels. The absence of any insider buying during or after the selloff is a cautionary detail.
STNG — Scorpio Tankers ▶ NO FORM 4 — FPI EXEMPT
What Happened: No Form 4 filings were found for Scorpio Tankers in April 2026, nor are any expected. Nasdaq’s own insider activity page for STNG explicitly notes: “An FPI is exempt of filing insider holdings with the SEC.” In February 2026, a Rule 144 notice disclosed a planned sale of 69,794 shares (~$4.76 million), but Rule 144 notices are pre-sale notifications from equity compensation recipients — not Form 4 open-market trading disclosures. The most recent Form 3 ownership disclosures were filed in March 2026 following board changes. Separately, STNG announced a $300 million convertible senior note offering and concurrent stock buyback on April 7.
What It Implies: Neutral on insider signal. The Rule 144 activity from February reflects scheduled equity compensation liquidation — routine for management at most public companies. More notable is the April 7 convertible note offering: it raises dilution risk but pairs it with a buyback, suggesting management believes the stock is undervalued at current levels. That is a constructive signal from the company even if it does not appear in any insider tracking tool.
Why This Happens: Scorpio Tankers is incorporated in the Marshall Islands and is a Foreign Private Issuer. Like most non-U.S. tanker operators, its executives and directors have no obligation to file Form 4. The Rule 144 notice mechanism is a different regulatory pathway used when insiders sell restricted stock — it is a pre-sale notice to the SEC, not an after-the-fact trading report. These notices do not appear on OpenInsider or standard Form 4 screeners.
DHT — DHT Holdings ▶ NO FORM 4 — FPI EXEMPT
What Happened: No Form 4 insider transactions were filed for DHT Holdings in April 2026. The only recent SEC filings are Form 3 initial ownership statements filed in March 2026 by several directors, including new board member Erik Bartnes (disclosing 18,000 shares). Form 3 filings report existing holdings when someone first becomes a reporting insider — they do not indicate purchases or sales. DHT also filed its 20-F annual report in March and issued a 6-K fleet update on March 30.
What It Implies: Neutral. The Form 3 filings confirm board composition but carry no directional signal. For DHT, the relevant signal to monitor is fleet activity (vessel transactions, charter rates) disclosed via 6-K filings — not the insider filing record, which will remain blank for open-market trades.
Why This Happens: DHT Holdings is incorporated in the Marshall Islands with management companies in Oslo and Singapore. It is a Foreign Private Issuer and exempt from Form 4 reporting. Even FPIs must file Form 3 when directors are formally appointed to disclose existing holdings, but the follow-on Form 4 obligation does not apply. DHT directors will never file Form 4 regardless of how frequently they trade shares.
HAFN — Hafnia Ltd ▶ NO FORM 4 — FPI EXEMPT
What Happened: No Form 4 insider transactions were filed for Hafnia on EDGAR in April 2026. However, Hafnia’s Oslo Stock Exchange regulatory feed showed meaningful insider activity in March: a mandatory notification of trade on March 17 disclosing RSU exercises by primary insiders, and a separate notification on March 4 disclosing the exercise of options and sale of shares by primary insiders. These Oslo filings do not translate into SEC Form 4 disclosures. On March 27, Hafnia filed a 6-K with the SEC disclosing the cancellation of treasury shares.
What It Implies: Neutral to monitor. The Oslo-disclosed RSU exercises and option sales in March are routine equity compensation events — not open-market discretionary trades. The treasury share cancellation is modestly shareholder-friendly. No directional insider signal is readable through the U.S. channel for this name.
Why This Happens: Hafnia is incorporated in Bermuda and listed on both the NYSE and Oslo Stock Exchange. It is a Foreign Private Issuer. Insider trading disclosures are governed by Norwegian Financial Instruments Trading Act rules requiring mandatory notifications published through the Oslo Børs system — a completely separate pipeline from SEC Form 4. Investors monitoring only OpenInsider or EDGAR will see nothing from Hafnia regardless of how active its insiders are.
TNK — Teekay Tankers ▶ NO FORM 4 — FPI EXEMPT
What Happened: No Form 4 insider transactions were filed for Teekay Tankers in April 2026. In March 2026, multiple Form 3 initial ownership statements were filed for newly reporting directors and officers, including CEO Kenneth Hvid (109,405 shares and substantial RSU awards) and new director Alan Semple (6,134 shares). These are initial disclosure filings, not trade reports. The company filed its 20-F annual report in March and a 6-K with Q4 2025 results in February.
What It Implies: Neutral. The Form 3 wave in March reflects a housekeeping cycle following organizational changes. Worth noting separately: Teekay Tankers sold its entire 2.05 million share position in ASC (Ardmore Shipping) between mid-September and end of Q4 2025 for total proceeds of $26.3 million. That institutional exit was the most actionable recent portfolio signal from TNK management, though it occurred outside the current monitoring window.
Why This Happens: Teekay Tankers is incorporated in Bermuda and is a Foreign Private Issuer. Directors who hold NYSE-listed securities must register as reporting persons upon appointment (Form 3), but the follow-on Form 4 obligation does not apply. CEO Hvid’s substantial RSU awards visible in his Form 3 will never generate a Form 4 when they vest or when he sells shares in the open market.
EURN — Euronav / CMB.TECH NV ▶ NO FORM 4 — FPI EXEMPT
What Happened: No Form 4 insider transactions were filed for EURN / CMB.TECH in April 2026, nor are any expected. Note: this ticker underwent significant corporate change — Euronav NV renamed itself CMB.TECH NV effective October 2024 and changed its NYSE ticker from EURN to CMBT. The entity is now pursuing a merger with Golden Ocean Group. Most recent EDGAR filings are 6-K current reports, Form 20-F filings, and merger-related 425/13D filings. No insider trade disclosures appear on EDGAR.
What It Implies: Neutral on insider signal. The ongoing CMB.TECH / Golden Ocean merger process is the dominant event for this name. Insider behavior during a pending merger is constrained by blackout policies and information barriers regardless of disclosure rules. The correct monitoring channel for CMB.TECH insiders is Euronext Brussels and Belgium’s FSMA regulator — not EDGAR.
Why This Happens: CMB.TECH NV (formerly Euronav) is a Belgian corporation listed on Euronext Brussels and the NYSE. It is a Foreign Private Issuer under SEC rules. Belgian insider trading disclosures are regulated by FSMA rules requiring publication through Euronext’s regulated information service — a completely different system from SEC Form 4. Investors who may still be monitoring EURN on OpenInsider from its prior identity will find nothing.
ASC — Ardmore Shipping ▶ NO FORM 4 — FPI EXEMPT
What Happened: No Form 4 insider transactions were filed for Ardmore Shipping in April 2026. In March 2026, multiple Form 3 initial ownership statements were filed by directors including Curtis McWilliams (80,673 shares plus 14,781 RSUs). In February and March, several Rule 144 notices covered RSU vesting events and a small discretionary sale: Robert Gaina sold 5,463 shares on February 19 for $80,907. Ardmore filed its 20-F annual report in March 2026.
What It Implies: Neutral. The Rule 144 activity is consistent with routine equity compensation management. The $80,907 Gaina sale is well below the $1 million signal threshold and carries no directional weight. More significant context: Teekay Tankers exited its entire 2.05 million share position in ASC during Q4 2025 — an institutional-level exit more relevant than any recent Form 4 or Rule 144 activity at the company itself.
Why This Happens: Ardmore Shipping is incorporated in the Marshall Islands and is a Foreign Private Issuer. Rule 144 notices are pre-clearance filings used when affiliates sell restricted stock — they are not insider trading reports and do not appear on OpenInsider. Form 3 filings reflect director registration upon board appointment. Both filing types further fragment the picture available to retail investors attempting to monitor insider activity through standard U.S. tools.
Data sources: secform4.com, stocktitan.net, insider-monitor.com, marketbeat.com, quantisnow.com. Cross-confirmed across multiple secondary sources. Not financial advice. For informational purposes only.