SEC Form 4
Viking Therapeutics, Inc (VKTX) insider trading
In the 12 months to Oct 23, 2026, 5 VKTX insiders reported open-market sales of $22.3M across 11 filings; one chief commercial officer bought $149.9K.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $22.3M
- 11 filings · 5 insiders
- Open-market purchases
- $149.9K
- 1 filing · Neil William Aubuchon, Chief Commercial Officer
Who traded VKTX, and when
- Purchase
- Sale
VKTX daily close from Oct 23, 2025 to Oct 23, 2026, between $24.40 and $42.13, last $24.40. 11 sale and 1 purchase filings by 6 insiders, marked at their filing dates. Brian Lian, President & CEO: sold $14.0M across 3 filings, first filed Oct 28, 2025, last Jul 29, 2026. Greg Zante, Chief Financial Officer: sold $2.8M across 3 filings, first filed Oct 28, 2025, last Jul 29, 2026. Marianna Mancini, Chief Operating Officer: sold $2.7M across 3 filings, first filed Oct 28, 2025, last Jul 29, 2026. Charles A. Rowland Jr., Director: sold $2.1M across 1 filing, first filed Oct 28, 2025, last Oct 28, 2025. Matthew W. Foehr, Director: sold $561.7K across 1 filing, first filed Jan 5, 2026, last Jan 5, 2026. Neil William Aubuchon, Chief Commercial Officer: bought $149.9K across 1 filing, first filed Mar 10, 2026, last Mar 10, 2026.
Largest mark · tap a row for others
Brian Lian · President & CEO
Sale $7,692,121
233,409 shares at $32.96 avg
Filed Jan 5, 2026
Close on filing date $32.14
Brian Lian · President & CEO
President & CEO
$14.0M soldGreg Zante · Chief Financial Officer
Chief Financial Officer
$2.8M soldMarianna Mancini · Chief Operating Officer
Chief Operating Officer
$2.7M soldCharles A. Rowland Jr. · Director
Director
$2.1M soldMatthew W. Foehr · Director
Director
$561.7K soldNeil William Aubuchon · Chief Commercial Officer
Chief Commercial Officer
$149.9K boughtHas Viking Therapeutics, Inc's CEO sold stock?
Yes. Brian Lian (CEO) sold 420,915 shares ($14.0M) between Oct 2025 and Jul 2026.
Open-market trades
12 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Brian Lian | President & CEO | $14.0M | — | 3 | — | |
| Greg Zante | Chief Financial Officer | $2.8M | — | 3 | — | |
| Marianna Mancini | Chief Operating Officer | $2.7M | — | 3 | — | |
| Charles A. Rowland Jr. | Director | $2.1M | — | 1 | — | |
| Matthew W. Foehr | Director | $561.7K | — | 1 | — | |
| Neil William Aubuchon | Chief Commercial Officer | — | $149.9K | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Marianna Mancini Chief Operating Officer | Sale | 18,217 | $33.47 | $609.6K | 422,760 | |
traded | Greg Zante Chief Financial Officer | Sale | 21,217 | $33.47 | $710.1K | 212,204 | |
traded | Brian Lian President & CEO | Sale | 148,517 | $33.32 | $4.9M | 2,572,441 | |
traded | Neil William Aubuchon Chief Commercial Officer | Purchase | 4,475 | $33.50 | $149.9K | 4,475 | |
traded | Matthew W. Foehr Director | Sale | 16,000 | $35.11 | $561.7K | 132,036 | |
traded | Brian Lian President & CEO | Sale | 233,409 | $32.96 | $7.7M | 2,600,246 | |
traded | Marianna Mancini Chief Operating Officer | Sale | 57,661 | $32.98 | $1.9M | 410,790 | |
traded | Greg Zante Chief Financial Officer | Sale | 57,661 | $32.90 | $1.9M | 189,891 | |
traded | Greg Zante Chief Financial Officer | Sale | 6,185 | $35.00 | $216.5K | 173,592 | |
traded | Brian Lian President & CEO | Sale | 38,989 | $35.01 | $1.4M | 2,419,109 | |
traded | Charles A. Rowland Jr. Director | Sale | 60,000 | $35.57 | $2.1M | 30,000 | |
traded | Marianna Mancini Chief Operating Officer | Sale | 6,185 | $35.00 | $216.5K | 382,467 |
GET /stocks/filings/vX/form-4?tickers=VKTX&filing_date.gte=2025-10-23&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"VKTX"
],
"issuer_cik": "0001607678",
"owner_cik": "0001614578",
"accession_number": "0001193125-26-324448",
"form_type": "4",
"filing_date": "2026-07-29",
"period_of_report": "2026-07-28",
"issuer_name": "Viking Therapeutics, Inc.",
"issuer_trading_symbol": "VKTX",
"owner_name": "Lian Brian",
"is_director": true,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "President & CEO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock, par value $0.00001 per share",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-07-29",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 148517,
"transaction_price_per_share": 33.3153,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 2572441,
"transaction_value": 4947888.4101,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F2",
"description": "These shares were automatically sold on a non-discretionary basis solely to satisfy certain tax withholding obligations in connection with the issuance of shares upon the vesting of certain shares of common stock subject to the performance restricted stock unit award described in Footnote 1."
},
{
"id": "F3",
"description": "The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.82 to $33.77, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in the this footnote."
}
]
},
{
"tickers": [
"VKTX"
],
"issuer_cik": "0001607678",
"owner_cik": "0001838112",
"accession_number": "0001193125-26-324446",
"form_type": "4",
"filing_date": "2026-07-29",
"period_of_report": "2026-07-28",
"issuer_name": "Viking Therapeutics, Inc.",
"issuer_trading_symbol": "VKTX",
"owner_name": "Mancini Marianna",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "Chief Operating Officer",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock, par value $0.00001 per share",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-07-29",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 18217,
"transaction_price_per_share": 33.4652,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 422760,
"transaction_value": 609635.5484000001,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F3",
"description": "These shares were automatically sold on a non-discretionary basis solely to satisfy certain tax withholding obligations in connection with the issuance of shares upon the vesting of certain shares of common stock subject to the performance restricted stock unit award described in Footnote 1."
},
{
"id": "F4",
"description": "The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.28 to $33.805, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in the this footnote."
}
]
}
]
}
// 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) · 22 records
- Option exercises1 record
- Grants and awards21 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 VKTX 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.