XOOMAR

Viking Therapeutics (VKTX)

Viking Therapeutics on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as pharmaceutical preparations.

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25.9M

Short interest

settlement 2026-09-30

2.2

Days to cover

-10.2 days vs prior

41.2%

Short share of volume

2026-10-09

778

Fails to deliver

settlement 2026-09-11

Wed 21 Oct

Next earnings

estimated date

-$6.3M

Insider flow, 90 days

0 buys, 3 sells

As of 2026-10-09.

Short interest

FINRA, twice a month. The newest 24 settlements in the table, 48 in the chart. JSON

As of 30 September 2026, short interest in VKTX is 25,921,759 shares, up 3,735,239 shares over the last month. Over the last 48 readings it ranged from 13,280,561 shares (31 October 2024) to 28,698,835 shares (31 July 2025). At the reported average volume of 12.0M shares a day that is 2.2 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-09-3025,921,759+14.8%12,010,2502.16
2026-09-1522,583,758+1.8%1,833,20112.32
2026-08-3122,186,520-0.4%1,790,60812.39
2026-08-1422,285,459-1.1%1,675,35213.30
2026-07-3122,541,431-2.7%2,148,92910.49
2026-07-1523,160,859-1.5%2,354,7879.84
2026-06-3023,507,768+0.8%3,534,1936.65
2026-06-1523,318,798+4.2%2,003,87711.64
2026-05-2922,371,620+0.4%1,913,80311.69
2026-05-1522,278,429-1.6%1,989,99611.20
2026-04-3022,652,414-2.0%2,538,2798.92
2026-04-1523,110,005-3.7%2,091,87111.05
2026-03-3124,006,215-1.2%2,443,4939.82
2026-03-1324,296,409-0.1%2,458,4719.88
2026-02-2724,324,779-7.0%2,244,52410.84
2026-02-1326,159,249+0.4%3,773,7946.93
2026-01-3026,061,262+3.7%2,639,0039.88
2026-01-1525,128,113+3.2%4,209,7565.97
2025-12-3124,344,265+1.3%2,077,36011.72
2025-12-1524,029,319+4.5%2,735,3018.78
2025-11-2822,990,072-7.2%2,958,7967.77
2025-11-1424,785,654+2.5%4,589,9865.40
2025-10-3124,173,606-5.0%4,468,0825.41
2025-10-1525,450,539-7.6%5,192,9744.90

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 9 October 2026, the short share of VKTX volume is 41.2%, down 0.2 points over the last five sessions. Over the last 30 readings it ranged from 38.9% (30 September 2026) to 68.3% (24 September 2026). The latest reading sits at the bottom of that range. The latest reading is 6.6 points below the 30-session average of 47.8%, on 1.9M shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-10-09769K1.9M41.2%1,774
2026-10-081.5M3.7M39.2%5,908
2026-10-071.0M2.3M44.4%7,517
2026-10-061.7M3.7M45.1%10,770
2026-10-051.4M3.4M39.5%1,157
2026-10-021.3M3.2M41.5%10,593
2026-10-011.4M3.5M39.0%10,304
2026-09-301.3M3.2M38.9%1,280
2026-09-291.9M4.5M41.9%665
2026-09-281.6M4.0M40.6%5,056
2026-09-253.3M6.6M50.0%508,255
2026-09-249.5M13.9M68.3%925,965
2026-09-234.5M7.6M59.5%31,991
2026-09-2210.5M18.0M58.5%76,816
2026-09-211.2M2.4M47.9%1,417
2026-09-18553K991K55.8%2,541
2026-09-17391K942K41.5%12,045
2026-09-16658K1.5M44.2%0
2026-09-15631K1.4M46.7%2,824
2026-09-14410K921K44.5%11
2026-09-11426K982K43.4%900
2026-09-10423K773K54.7%41,572
2026-09-09541K951K56.8%200
2026-09-08520K902K57.7%2,900
2026-09-04335K608K55.1%171
2026-09-03252K576K43.7%1,355
2026-09-02278K648K43.0%147
2026-09-01305K576K53.0%0
2026-08-31294K570K51.5%461
2026-08-28571K1.2M47.3%6,380

Fails to deliver

SEC, the last 30 settlement dates with a fail. JSON

As of 11 September 2026, the fails-to-deliver balance in VKTX is 778 shares, up 60 shares over the last settlement date. Over the last 30 readings it ranged from 2 shares (20 August 2026) to 105,349 shares (8 September 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-09-11778$32.13$25K
2026-09-09718$33.68$24K
2026-09-08105,349$34.87$3.7M
2026-09-0452,295$33.98$1.8M
2026-09-0311,468$33.50$384K
2026-08-28200$33.86$7K
2026-08-273,998$34.38$137K
2026-08-202$35.98$72
2026-08-143,879$32.94$128K
2026-08-1314,386$34.02$489K
2026-08-12721$33.80$24K
2026-08-1114,927$34.44$514K
2026-08-1075,628$34.26$2.6M
2026-08-0720,195$33.30$672K
2026-08-0514,571$32.94$480K
2026-07-31643$33.11$21K
2026-07-20299$37.08$11K
2026-07-17514$36.37$19K
2026-07-14564$38.12$21K
2026-07-10443$41.14$18K
2026-07-091,267$39.96$51K
2026-07-01100$39.01$4K
2026-06-3016,821$39.54$665K
2026-06-291,858$38.04$71K
2026-06-252,327$37.87$88K
2026-06-2451$34.81$2K
2026-06-2333,531$32.37$1.1M
2026-06-2256,953$30.38$1.7M
2026-06-1838,446$30.29$1.2M
2026-06-179,830$29.65$291K

Insider trades

SEC Form 4, newest first, 50 of 100 shown. JSON

Insiders at VKTX reported 3 open-market sells worth $6.3M in the last 90 days and no open-market buys. Latest filing: Kelly-Gemmell Dorothy Elizabeth (Director) on 2026-08-01.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-08-01Kelly-Gemmell Dorothy ElizabethDirectorGrant6K$0.00$06K
2026-07-29ZANTE GREGChief Financial OfficerSell21K$33.47$710K212K
2026-07-29Mancini MariannaChief Operating OfficerSell18K$33.47$610K423K
2026-07-29Lian BrianPresident & CEOSell149K$33.32$4.9M2.6M
2026-07-28ZANTE GREGChief Financial OfficerGrant32K$0.00$0233K
2026-07-28Mancini MariannaChief Operating OfficerGrant32K$0.00$0441K
2026-07-28Lian BrianPresident & CEOGrant222K$0.00$02.7M
2026-03-10Aubuchon Neil WilliamChief Commercial OfficerBuy4K$33.50$150K4K
2026-01-05ZANTE GREGChief Financial OfficerSell2K$32.09$48K190K
2026-01-05ZANTE GREGChief Financial OfficerSell10K$34.24$353K191K
2026-01-05ZANTE GREGChief Financial OfficerSell14K$33.38$464K202K
2026-01-05ZANTE GREGChief Financial OfficerSell32K$32.30$1.0M216K
2026-01-05Mancini MariannaChief Operating OfficerSell2K$35.07$56K409K
2026-01-05Mancini MariannaChief Operating OfficerSell11K$34.22$359K411K
2026-01-05Mancini MariannaChief Operating OfficerSell14K$33.37$454K421K
2026-01-05Mancini MariannaChief Operating OfficerSell32K$32.29$1.0M435K
2026-01-05Lian BrianPresident & CEOSell6K$35.07$224K2.5M
2026-01-05Lian BrianPresident & CEOSell41K$34.22$1.4M2.5M
2026-01-05Lian BrianPresident & CEOSell53K$33.38$1.8M2.5M
2026-01-05Lian BrianPresident & CEOSell132K$32.29$4.3M2.6M
2026-01-02ZANTE GREGChief Financial OfficerGrant32K$0.00$0248K
2026-01-02ZANTE GREGChief Financial OfficerGrant41K$0.00$0215K
2026-01-02SINGLETON J MATTHEWDirectorGrant3K$0.00$013K
2026-01-02Rowland Charles A JrDirectorGrant3K$0.00$033K
2026-01-02Rouan Sarah KathrynDirectorGrant3K$0.00$04K
2026-01-02Mancini MariannaChief Operating OfficerGrant32K$0.00$0467K
2026-01-02Mancini MariannaChief Operating OfficerGrant41K$0.00$0435K
2026-01-02MACARTNEY LAWSONDirectorGrant3K$0.00$051K
2026-01-02Lian BrianPresident & CEOGrant224K$0.00$02.7M
2026-01-02Lian BrianPresident & CEOGrant78K$0.00$02.5M
2026-01-02FOEHR MATTHEW WDirectorGrant3K$0.00$0135K
2026-01-02FOEHR MATTHEW WDirectorSell16K$35.11$562K132K
2026-01-02FOEHR MATTHEW WDirectorOption exercise16K$3.33$53K148K
2025-10-28ZANTE GREGChief Financial OfficerSell6K$35.00$216K174K
2025-10-28Mancini MariannaChief Operating OfficerSell6K$35.00$216K382K
2025-10-28Lian BrianPresident & CEOSell39K$35.01$1.4M2.4M
2025-10-27Rowland Charles A JrDirectorGrant22K$4.88$107K90K
2025-10-27ZANTE GREGChief Financial OfficerGrant11K$0.00$0180K
2025-10-27Rowland Charles A JrDirectorSell60K$35.57$2.1M30K
2025-10-27Rowland Charles A JrDirectorGrant22K$5.80$128K68K
2025-10-27Rowland Charles A JrDirectorGrant16K$4.48$72K46K
2025-10-27Mancini MariannaChief Operating OfficerGrant11K$0.00$0389K
2025-10-27Lian BrianPresident & CEOGrant70K$0.00$02.5M
2025-07-03ZANTE GREGChief Financial OfficerSell4K$27.76$118K169K
2025-07-03Mancini MariannaChief Operating OfficerSell4K$27.77$118K378K
2025-07-03Lian BrianPresident & CEOSell27K$27.80$748K2.4M
2025-07-02ZANTE GREGChief Financial OfficerGrant8K$0.00$0173K
2025-07-02Mancini MariannaChief Operating OfficerGrant8K$0.00$0382K
2025-07-02Lian BrianPresident & CEOGrant48K$0.00$02.4M
2025-04-11FOEHR MATTHEW WDirectorOption exercise21K$8.00$166K132K

Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.

Planned sales (Form 144)

Newest first. JSON

11 Form 144 notices on file for VKTX worth $22.3M at the prices reported; 3 in the last 90 days worth $6.3M. Latest: GREG ZANTE filed on 2026-07-29 to sell 21,217 shares ($710K) from 2026-07-29.

FiledSellerSharesMarket valueOf outstandingSale fromBroker
2026-07-29GREG ZANTEOfficer21K$710K0.018%2026-07-29Morgan Stanley Smith Barney LLC Executive Financial Services
2026-07-29MARIANNA MANCINIOfficer18K$610K0.016%2026-07-29Morgan Stanley Smith Barney LLC Executive Financial Services
2026-07-29BRIAN LIANOfficer149K$4.9M0.128%2026-07-29Morgan Stanley Smith Barney LLC Executive Financial Services
2026-01-05GREG ZANTEOfficer58K$1.9M0.051%2026-01-05Morgan Stanley Smith Barney LLC Executive Financial Services
2026-01-05MARIANNA MANCINIOfficer58K$1.9M0.051%2026-01-05Morgan Stanley Smith Barney LLC Executive Financial Services
2026-01-05BRIAN LIANOfficer233K$7.7M0.206%2026-01-05Morgan Stanley Smith Barney LLC Executive Financial Services
2026-01-02MATTHEW W. FOEHRDirector16K$562K0.014%2026-01-02Morgan Stanley Smith Barney LLC Executive Financial Services
2025-10-28GREG ZANTEOfficer6K$217K0.005%2025-10-28Morgan Stanley Smith Barney LLC Executive Financial Services
2025-10-28MARIANNA MANCINIOfficer6K$216K0.005%2025-10-28Morgan Stanley Smith Barney LLC Executive Financial Services
2025-10-28BRIAN LIANOfficer39K$1.4M0.034%2025-10-28Morgan Stanley Smith Barney LLC Executive Financial Services
2025-10-27CHARLES A ROWLAND JR.Director60K$2.1M0.053%2025-10-27Morgan Stanley Smith Barney LLC Executive Financial Services

Large holders (13D and 13G)

One row per reporting person with its latest filing, newest first. JSON

3 holders report 5% or more of VKTX in their latest filing, all on Schedule 13G (passive). The largest reported stake is FMR LLC at 5.1% of the class (5,772,051 shares), filed 2025-11-05 for an event on 2025-09-30.

FiledFormHolderSharesOf classEvent
2026-04-3013GVanguard Capital Managementinvestment adviser5.9M5.1%2026-03-31
2026-03-2713G/Ano. 3The Vanguard Groupinvestment adviser00.0%2026-03-13
2025-11-0513G/Ano. 4FMR LLCparent holding company5.8M5.1%2025-09-30
2025-11-0513G/Ano. 4Abigail P. Johnsonindividual5.8M5.1%2025-09-30

13F holders

Tracked managers holding VKTX at their latest 13F. JSON

7 of the 30 tracked managers held VKTX at their latest 13F, $302.5M in total at quarter-end prices. Two Sigma Investments is the largest at $153.6M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 4 added shares and 3 cut.

FundQuarterSharesValueOf portfolioChange in shares
Two Sigma Investments2026-06-303.9M$153.6M0.11%-495K
D. E. Shaw & Co.2026-06-301.6M$62.6M0.03%-71K
Citadel Advisors2026-06-30952K$37.1M0.00%-311K
Millennium Management2026-06-30498K$19.4M0.01%+248K
Point72 Asset Management2026-06-30473K$18.5M0.02%new
AQR Capital Management2026-06-30201K$7.8M0.00%+189K
Bridgewater Associates2026-06-3088K$3.4M0.01%+17K

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

Financials

SEC XBRL, as filed. JSON

In Q2 FY 2026 (quarter ended 2026-06-30) Viking Therapeutics reported revenue of $0, and net loss of $128.0M (-1.10 diluted EPS). In FY 2025 it generated -$278.7M of operating cash flow.

Cash
$125.8M
Equity
$408.3M
Total assets
$521.9M
Shares outstanding
116,652,937

Quarterly, last 8 quarters

QuarterPeriod endRevenueNet incomeMarginDiluted EPS
Q2 FY 20262026-06-30$0-$128.0Mn/a-1.10
Q1 FY 20262026-03-31$0-$158.3Mn/a-1.37
Q4 FY 2025derived2025-12-31$0-$157.7Mn/an/a
Q3 FY 20252025-09-30$0-$90.8Mn/a-0.81
Q2 FY 20252025-06-30$0-$65.6Mn/a-0.58
Q1 FY 20252025-03-31$0-$45.6Mn/a-0.41
Q4 FY 2024derived2024-12-31$0-$35.4Mn/an/a
Q3 FY 20242024-09-30$0-$24.9Mn/a-0.22

Fiscal years, with buybacks and dividends

Fiscal yearEndsRevenueNet incomeOperating cash flowCapexBuybacksDividends
FY 20252025-12-31$0-$359.6M-$278.7Mn/an/an/a
FY 20242024-12-31$0-$110.0M-$87.8Mn/an/an/a
FY 20232023-12-31$0-$85.9M-$73.4Mn/an/an/a
FY 20222022-12-31$0-$68.9M-$48.4Mn/a$6.8Mn/a
FY 20212021-12-31$0-$55.0M-$47.6Mn/an/an/a

Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-07-15 from the cover page.

What this page is

Viking Therapeutics in the regulatory record

Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.

Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.

This page follows Viking Therapeutics (VKTX), SEC CIK 1607678, listed on Nasdaq, classified by the SEC as pharmaceutical preparations. The cross-market tables live on the short interest and insider transactions hubs.

Source and updates

Short interest
FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-09-30.JSON and CSV
Daily short volume
FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-09.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-11.JSON and CSV
Planned sales
SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-07-29.JSON and CSV
Large holders
SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-04-30.JSON and CSV
13F holders
SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Financials
SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
Earnings dates
SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-07-29.JSON and CSV
Insider trades
SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-08-01.JSON and CSV
Company record
EDGAR filing index for CIK 1607678Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits
10 requests a minute without a key, 30 with a free key from a free account.

How to read it

  • Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
  • Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
  • Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.

Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.

Datasets

Frequently Asked Questions

How much of VKTX is sold short?
25,921,759 shares were held short at the 2026-09-30 settlement, 2.2 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is VKTX's daily short volume?
On 2026-10-09, 768,785 of the 1,864,331 VKTX shares reported to FINRA were sold short, 41.2% of the day's reported volume. Short volume is a flow for one day, not a position.
Does VKTX have fails to deliver?
The SEC's latest file shows 778 VKTX shares failed to deliver at settlement 2026-09-11. Fails are reported per settlement date and published twice a month with a lag.
Are VKTX insiders buying or selling?
Insiders at VKTX reported 3 open-market sells worth $6.3M in the last 90 days and no open-market buys. Latest filing: Kelly-Gemmell Dorothy Elizabeth (Director) on 2026-08-01.
Have VKTX insiders filed to sell?
11 Form 144 notices on file for VKTX worth $22.3M at the prices reported; 3 in the last 90 days worth $6.3M. Latest: GREG ZANTE filed on 2026-07-29 to sell 21,217 shares ($710K) from 2026-07-29.
Who owns 5% or more of VKTX?
3 holders report 5% or more of VKTX in their latest filing, all on Schedule 13G (passive). The largest reported stake is FMR LLC at 5.1% of the class (5,772,051 shares), filed 2025-11-05 for an event on 2025-09-30.
What did VKTX report last quarter?
In Q2 FY 2026 (quarter ended 2026-06-30) Viking Therapeutics reported revenue of $0, and net loss of $128.0M (-1.10 diluted EPS). In FY 2025 it generated -$278.7M of operating cash flow.
Which tracked 13F managers own VKTX?
7 of the 30 tracked 13F managers held VKTX shares at their latest filing, $302.5M in all. The largest: Two Sigma Investments (3.9M shares, $153.6M), D. E. Shaw & Co. (1.6M shares, $62.6M), Ken Griffin's Citadel Advisors (952K shares, $37.1M), Izzy Englander's Millennium Management (498K shares, $19.4M), Steve Cohen's Point72 Asset Management (473K shares, $18.5M), Cliff Asness's AQR Capital Management (201K shares, $7.8M). The table above lists all 7.

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.