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Vivani Medical (VANI)

Vivani Medical on one page: short interest, daily short volume, fails to deliver, large holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as electromedical & electrotherapeutic apparatus.

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417K

Short interest

settlement 2026-10-15

2.8

Days to cover

+0.2 days vs prior

64.3%

Short share of volume

2026-11-02

73,147

Fails to deliver

settlement 2026-08-25

Thu 12 Nov

Next earnings

estimated date

$0

Insider flow, 90 days

0 buys, 0 sells

As of 2026-11-02.

Short interest

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

As of 15 October 2026, short interest in VANI is 417,148 shares, down 277,118 shares over the last month. Over the last 48 readings it ranged from 213,332 shares (31 December 2025) to 754,373 shares (31 October 2024). At the reported average volume of 151K shares a day that is 2.8 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-10-15417,148-19.7%151,1592.76
2026-09-30519,687-25.1%203,1502.56
2026-09-15694,266+40.2%264,9922.62
2026-08-31495,236-6.6%228,2322.17
2026-08-14530,090+6.4%134,6393.94
2026-07-31498,174+40.6%229,6202.17
2026-07-15354,370-18.1%1,818,9881.00
2026-06-30432,659+14.1%186,2452.32
2026-06-15379,135+12.8%145,2492.61
2026-05-29335,967-14.4%234,0201.44
2026-05-15392,626+11.9%170,7732.30
2026-04-30350,946-33.8%463,1411.00
2026-04-15529,859-0.4%138,7703.82
2026-03-31532,131+65.0%280,7761.90
2026-03-13322,575+11.0%173,3631.86
2026-02-27290,597-25.4%201,5651.44
2026-02-13389,363-3.0%317,6891.23
2026-01-30401,264+87.4%771,8041.00
2026-01-15214,164+0.4%100,7062.13
2025-12-31213,332-3.1%278,0931.00
2025-12-15220,276-29.4%141,4641.56
2025-11-28312,110-13.4%205,3451.52
2025-11-14360,370-42.6%251,7921.43
2025-10-31628,250+158.2%742,7091.00
2025-10-15243,281-10.8%107,1842.27
2025-09-30272,628+14.7%301,1041.00
2025-09-15237,667-2.1%64,0223.71
2025-08-29242,739-2.3%42,7205.68
2025-08-15248,521-32.5%211,8181.17
2025-07-31368,331+10.4%120,1433.07
2025-07-15333,492-1.6%109,5613.04
2025-06-30339,003+17.3%199,8601.70
2025-06-13288,895-16.4%112,6322.56
2025-05-30345,386+16.9%89,6033.85
2025-05-15295,360-6.7%41,3197.15
2025-04-30316,537-9.1%48,2946.55
2025-04-15348,233-7.0%123,0912.83
2025-03-31374,492+32.2%116,9013.20
2025-03-14283,332-0.7%88,4193.20
2025-02-28285,431+2.2%71,7123.98
2025-02-14279,346-7.2%87,9503.18
2025-01-31300,992-7.7%79,5673.78
2025-01-15326,043-8.9%111,3672.93
2024-12-31357,986-23.1%158,8992.25
2024-12-13465,241-3.4%107,7384.32
2024-11-29481,425-9.3%164,4062.93
2024-11-15531,019-29.6%159,4053.33
2024-10-31754,373-12.1%62,81312.01

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 2 November 2026, the short share of VANI volume is 64.3%, up 20.3 points over the last five sessions. Over the last 30 readings it ranged from 21.8% (2 October 2026) to 75.3% (21 October 2026). The latest reading is 14.6 points above the 30-session average of 49.8%, on 132K shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-11-0285K132K64.3%0
2026-10-3066K133K49.9%0
2026-10-2942K99K42.6%0
2026-10-2842K158K26.6%0
2026-10-2737K124K30.2%0
2026-10-2633K74K44.1%0
2026-10-2333K65K51.2%573
2026-10-2285K153K55.8%0
2026-10-2162K82K75.3%10,022
2026-10-2029K56K51.5%0
2026-10-1933K58K56.3%0
2026-10-16112K206K54.2%456
2026-10-1526K60K43.0%0
2026-10-1460K99K60.6%110
2026-10-1399K197K50.3%0
2026-10-1256K112K50.2%2,500
2026-10-0934K67K50.5%661
2026-10-0865K114K57.2%0
2026-10-0789K170K52.4%106
2026-10-0649K71K69.2%0
2026-10-0535K64K54.8%0
2026-10-0215K67K21.8%0
2026-10-0117K41K40.1%0
2026-09-3029K73K39.6%0
2026-09-2937K62K59.8%0
2026-09-2857K80K71.0%0
2026-09-2539K91K43.2%0
2026-09-2425K55K45.8%0
2026-09-2335K108K32.1%400
2026-09-2256K112K49.5%5,110

Fails to deliver

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

As of 25 August 2026, the fails-to-deliver balance in VANI is 73,147 shares, unchanged over the last settlement date. Over the last 30 readings it ranged from 2 shares (13 November 2025) to 238,815 shares (17 July 2026).

SettlementShares failedPriceValue
2026-08-2573,147$1.38$101K
2026-08-2473,147$1.38$101K
2026-08-2173,147$1.41$103K
2026-08-2074,250$1.39$103K
2026-07-17238,815$1.35$322K
2026-07-16100,000$1.41$141K
2026-07-0620$1.26$25
2026-07-02110$1.23$135
2026-06-26819$1.14$934
2026-06-242,058$1.19$2K
2026-06-232,209$1.13$2K
2026-06-222,158$1.15$2K
2026-06-1546$1.10$51
2026-06-02383$1.29$494
2026-06-01809$1.32$1K
2026-03-31351$0.94$330
2026-03-309$1.02$9
2026-03-234,225$1.16$5K
2026-03-192,412$1.17$3K
2026-03-182,412$1.21$3K
2026-03-1612$1.10$13
2026-02-033,688$1.47$5K
2025-12-181,997$1.35$3K
2025-11-132$1.53$3
2025-11-041,150$1.60$2K
2025-11-031,150$1.61$2K
2025-10-309,431$1.77$17K
2025-10-295,708$1.67$10K
2025-10-21129$1.87$241
2025-10-10609$1.41$859

Insider trades

SEC Form 4, newest first. JSON

No open-market insider trades were reported for VANI in the last 90 days. The most recent filings are listed below. Latest filing: Mendelsohn Aaron (Director) on 2026-10-15.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-10-15Mendelsohn AaronDirectorGift20K$0.00$0168K
2026-07-15Williams GreggDirector, 10% ownerBuy794K$1.26$1000K36.9M
2026-06-15Williams GreggDirector,TenPercentOwnerBuy1.6M$1.26$2.0M36.1M
2026-05-15Williams GreggDirector, 10% ownerBuy1.6M$1.26$2.0M34.5M
2026-04-15Williams GreggDirector, 10% ownerBuy1.6M$1.26$2.0M32.9M
2026-03-15Williams GreggDirector, 10% ownerBuy265K$1.26$333K31.4M
2026-03-15Williams GreggDirector, 10% ownerBuy1.3M$1.03$1.4M31.1M
2026-02-15Williams GreggDirector, 10% ownerBuy265K$1.26$333K29.8M
2026-02-15Williams GreggDirector, 10% ownerBuy1.6M$1.03$1.6M29.5M
2026-01-27Williams GreggDirector, 10% ownerBuy1.4M$1.48$2.0M27.9M
2026-01-15Williams GreggDirector, 10% ownerBuy265K$1.26$333K26.6M
2026-01-15Williams GreggDirector, 10% ownerBuy1.5M$1.12$1.6M26.3M
2025-12-29Mendelsohn AaronDirectorBuy20K$1.23$25K188K
2025-12-15Williams GreggDirector, 10% ownerBuy265K$1.26$333K24.8M
2025-12-15Williams GreggDirector, 10% ownerBuy1.5M$1.12$1.6M24.6M
2025-11-15Williams GreggDirector, 10% ownerBuy265K$1.26$333K23.1M
2025-11-15Williams GreggDirector, 10% ownerBuy1.5M$1.12$1.6M22.8M
2025-10-27Williams GreggDirector, 10% ownerBuy3.7M$1.62$6.0M21.4M
2025-10-15Williams GreggDirector, 10% ownerBuy265K$1.26$333K17.6M
2025-10-15Williams GreggDirector, 10% ownerBuy1.5M$1.12$1.6M17.4M
2025-09-15Williams GreggDirector, 10% ownerBuy595K$1.26$750K15.9M
2025-09-15Williams GreggDirector, 10% ownerBuy1.5M$1.12$1.7M15.3M
2025-05-16Williams GreggDirector,TenPercentOwnerBuy2K$1.01$2K13.8M
2025-05-15Williams GreggDirector,TenPercentOwnerBuy7K$1.01$7K13.8M
2025-05-14Williams GreggDirector,TenPercentOwnerBuy3K$1.01$4K13.8M
2025-04-24Williams GreggDirector,TenPercentOwnerBuy1K$1.01$1K13.8M
2025-04-22Williams GreggDirector,TenPercentOwnerBuy243$1.01$24513.8M
2025-04-21Williams GreggDirector,TenPercentOwnerBuy2K$1.01$2K13.8M
2025-04-11Williams GreggDirector,TenPercentOwnerBuy2K$1.01$2K13.8M
2025-04-09Williams GreggDirector,TenPercentOwnerBuy19K$1.02$19K13.8M
2025-04-08Williams GreggDirector,TenPercentOwnerBuy63K$1.02$64K13.8M
2025-04-07Williams GreggDirector,TenPercentOwnerBuy44K$0.99$44K4.8M
2025-04-07Williams GreggDirector,TenPercentOwnerBuy59K$0.99$58K13.7M
2025-04-04Williams GreggDirector,TenPercentOwnerBuy6K$0.98$5K13.7M
2025-04-04Williams GreggDirector,TenPercentOwnerBuy34K$0.99$34K4.8M
2025-04-03Williams GreggDirector,TenPercentOwnerBuy23K$1.00$23K4.7M
2025-04-02Williams GreggDirector,TenPercentOwnerBuy2K$1.01$2K4.7M
2025-04-01Dwyer DonaldChief Business OfficerBuy4K$1.03$4K55K
2025-02-28Dwyer DonaldChief Business OfficerBuy1K$1.11$1K51K
2024-11-08Williams GreggDirector,TenPercentOwnerBuy4.0M$1.26$5.0M4.7M
2024-10-03Dwyer DonaldChief Business OfficerBuy500$1.13$56550K
2024-10-02Dwyer DonaldChief Business OfficerBuy1K$1.13$1K50K
2024-10-01Dwyer DonaldChief Business OfficerBuy1K$1.14$1K49K
2024-07-31Dwyer DonaldChief Business OfficerBuy4K$1.23$5K48K
2024-07-30Dwyer DonaldChief Business OfficerBuy5K$1.24$6K44K
2024-07-08Mendelsohn AaronDirectorGift20K$0.00$0168K
2024-02-15Williams GreggDirector,TenPercentOwnerBuy1K$1.01$1K728K
2024-02-09Williams GreggDirector,TenPercentOwnerBuy1K$1.01$1K727K
2024-02-08Williams GreggDirector,TenPercentOwnerBuy1K$1.01$1K725K
2024-02-06Williams GreggDirector,TenPercentOwnerBuy56$1.01$57724K
2024-02-05Williams GreggDirector,TenPercentOwnerBuy2K$1.01$2K724K
2024-01-31Williams GreggDirector,TenPercentOwnerBuy100$1.01$101722K
2024-01-23Williams GreggDirector,TenPercentOwnerBuy834$1.01$842722K
2024-01-22Williams GreggDirector,TenPercentOwnerBuy8K$1.01$8K721K
2024-01-19Williams GreggDirector,TenPercentOwnerBuy77$1.01$78714K
2024-01-18Williams GreggDirector,TenPercentOwnerBuy999$1.01$1K714K
2024-01-16Williams GreggDirector,TenPercentOwnerBuy13K$1.01$13K713K
2024-01-08Williams GreggDirector,TenPercentOwnerBuy7K$1.08$7K700K
2024-01-05Williams GreggDirector,TenPercentOwnerBuy2K$1.08$2K693K
2024-01-04Williams GreggDirector,TenPercentOwnerBuy4K$1.07$4K691K
2024-01-03Williams GreggDirector,TenPercentOwnerBuy4K$1.01$4K687K
2024-01-02Williams GreggDirector,TenPercentOwnerBuy4K$1.01$4K683K
2023-12-22Williams GreggDirector,TenPercentOwnerBuy100$1.00$100680K
2023-12-21Williams GreggDirector,TenPercentOwnerBuy150K$0.88$132K680K
2023-12-20Williams GreggDirector,TenPercentOwnerBuy4K$0.88$3K530K
2023-12-19Williams GreggDirector,TenPercentOwnerBuy198$0.86$170526K
2023-12-18Makes BrigidCFOBuy1K$0.87$87015K
2023-12-18Williams GreggDirector,TenPercentOwnerBuy2K$0.90$2K526K
2023-12-15Makes BrigidCFOBuy4K$0.89$4K14K
2023-12-15Williams GreggDirector,TenPercentOwnerBuy2K$0.89$2K524K
2023-12-14Williams GreggDirector,TenPercentOwnerBuy301$0.88$265522K
2023-12-13Williams GreggDirector,TenPercentOwnerBuy858$0.87$746521K
2023-12-11Williams GreggDirector,TenPercentOwnerBuy29K$0.89$26K520K
2023-12-06Williams GreggDirector,TenPercentOwnerBuy993$0.96$953492K
2023-11-24Williams GreggDirector,TenPercentOwnerBuy3K$0.95$3K491K
2023-11-22Dwyer DonaldChief Business OfficerBuy2K$0.96$2K39K
2023-11-22Dwyer DonaldChief Business OfficerBuy1K$0.96$96037K
2023-11-22Williams GreggDirector,TenPercentOwnerBuy769$0.95$731488K
2023-11-21Dwyer DonaldChief Business OfficerBuy2K$0.96$2K36K
2023-11-20Dwyer DonaldChief Business OfficerBuy3K$0.96$2K34K
2023-11-17Williams GreggDirector,TenPercentOwnerBuy1K$0.95$1K487K
2023-11-16Williams GreggDirector,TenPercentOwnerBuy2K$0.95$2K486K
2023-10-24Williams GreggDirector,TenPercentOwnerBuy1K$1.00$1K484K
2023-10-23Williams GreggDirector,TenPercentOwnerBuy101K$1.00$101K483K
2023-10-20Williams GreggDirector,TenPercentOwnerBuy2K$1.00$2K382K
2023-10-16Williams GreggDirector,TenPercentOwnerBuy2K$1.00$2K380K
2023-10-13Williams GreggDirector,TenPercentOwnerBuy9K$1.01$10K379K
2023-10-12Williams GreggDirector,TenPercentOwnerBuy1K$1.00$1K369K
2023-10-09Williams GreggDirector,TenPercentOwnerBuy664$1.00$664368K
2023-10-06Williams GreggDirector,TenPercentOwnerBuy88K$1.02$90K367K
2023-10-05Williams GreggDirector,TenPercentOwnerBuy1K$1.00$1K279K
2023-10-04Williams GreggDirector,TenPercentOwnerBuy5K$1.00$5K278K
2023-10-03Williams GreggDirector,TenPercentOwnerBuy3K$1.00$3K273K
2023-10-02Williams GreggDirector,TenPercentOwnerBuy16K$1.00$16K270K
2023-09-28Williams GreggDirector,TenPercentOwnerBuy20K$1.03$21K253K
2023-09-27Williams GreggDirector,TenPercentOwnerBuy1K$1.00$1K233K
2023-09-27Dwyer DonaldChief Business OfficerBuy1K$1.01$1K31K
2023-09-26Williams GreggDirector,TenPercentOwnerBuy2K$0.94$1K232K
2023-09-25Williams GreggDirector,TenPercentOwnerBuy24K$0.95$23K231K
2023-09-21Williams GreggDirector,TenPercentOwnerBuy398$0.93$370207K

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.

Large holders (13D and 13G)

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

2 holders report 5% or more of VANI in their latest filing, all on Schedule 13D (active intent). The largest reported stake is Williams Gregg at 47.1% of the class (43,218,419 shares), filed 2026-05-19 for an event on 2026-05-15.

FiledFormHolderSharesOf classEvent
2026-05-1913D/Ano. 11Williams Greggindividual43.2M47.1%2026-05-15
2026-05-1913D/Ano. 11Gregg G. Williams 2006 Trustother entity35.4M39.0%2026-05-15
2026-05-1913D/Ano. 11Williams International Co. LLCcorporation1.2M1.4%2026-05-15
2026-05-1913D/Ano. 11Sam B. Williams 1995 Generation Skipping Trustcorporation731K0.8%2026-05-15
2026-05-1913D/Ano. 11Sam Williams Family Investments LLCcorporation182K0.2%2026-05-15

What this page is

Vivani Medical 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 Vivani Medical (VANI), SEC CIK 1266806, listed on Nasdaq, classified by the SEC as electromedical & electrotherapeutic apparatus. 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 2026-10-15.JSON and CSV
Daily short volume
FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-02.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-08-25.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 2026-05-19.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 2026-08-13.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 2026-10-15.JSON and CSV
Company record
EDGAR filing index for CIK 1266806Ticker, 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.

Other companies the SEC classifies as electromedical & electrotherapeutic apparatus

Other company pages

Datasets

Frequently Asked Questions

How much of VANI is sold short?
417,148 shares were held short at the 2026-10-15 settlement, 2.8 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 VANI's daily short volume?
On 2026-11-02, 84,821 of the 131,855 VANI shares reported to FINRA were sold short, 64.3% of the day's reported volume. Short volume is a flow for one day, not a position.
Does VANI have fails to deliver?
The SEC's latest file shows 73,147 VANI shares failed to deliver at settlement 2026-08-25. Fails are reported per settlement date and published twice a month with a lag.
Are VANI insiders buying or selling?
No open-market insider trades were reported for VANI in the last 90 days. The most recent filings are listed below. Latest filing: Mendelsohn Aaron (Director) on 2026-10-15.
Who owns 5% or more of VANI?
2 holders report 5% or more of VANI in their latest filing, all on Schedule 13D (active intent). The largest reported stake is Williams Gregg at 47.1% of the class (43,218,419 shares), filed 2026-05-19 for an event on 2026-05-15.

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