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buyNotable cluster of 2

Gregg Williams bought $2.0M of VANI

director, owner at Vivani Medical, Inc.. 1,737,765 shares at an average of $1.14, traded Dec 15, 2025, filed Dec 16, 2025.

Conviction score
60
Value
$2.0M
1,737,765 shares
Holdings after
24,826,344
+8% from before
From 52-week low
+41%
low $0.96, close $1.35
From 52-week high
-28%
high $1.87, as of Dec 15, 2025

Score components

  • Role
    Director
    +15
  • Trade size
    $2.0M at market
    +25
  • Relative to holdings
    Holdings up 8%
    +3
  • Price context
    28% below the 52-week high
    +4
  • Cluster
    2 insiders buying within 14 days
    +8
  • Repeat buying
    4 buys in 90 days
    +5
  • Track record
    Too few past buys to judge (1 with prices)
    0

What happened after comparable buys

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

This signal so far: 1m -10.6%, 3m -14.2%, 6m -17.0%.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

VANIOct 12, 2026 · close 1.19
Since filing Dec 16, 2025: -15.6%SPY +15.9% · excess -31.5%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001753926-25-001892, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Dec 15, 2025POpen-market purchase
Common Stockindirect: See footnote
+1,473,214$1.12$1.6M24,561,793Dec 16, 2025
Dec 15, 2025POpen-market purchase
Common Stockindirect: See footnote
+264,551$1.26$333k24,826,344Dec 16, 2025

Related signals

Other insiders at Vivani Medical, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
44Moderate
VANIbuy
Vivani Medical, Inc.
Gregg Williams
director, owner
$1000k
793,650 shares
+2%
48Moderate
VANIbuy
Vivani Medical, Inc.
Gregg Williams
director, owner
$2.0M
1,587,301 shares
+5%
48Moderate
VANIbuy
Vivani Medical, Inc.
Gregg Williams
director, owner
$2.0M
1,587,301 shares
+5%
56Moderate
VANIbuy
Vivani Medical, Inc.
Gregg Williams
director, owner
$2.0M
1,587,301 shares
+5%
56Moderate
VANIbuy
Vivani Medical, Inc.
Gregg Williams
director, owner
$1.7M
1,575,231 shares
+5%
56Moderate
VANIbuy
Vivani Medical, Inc.
Gregg Williams
director, owner
$2.0M
1,866,492 shares
+7%
52Moderate
VANIbuy
Vivani Medical, Inc.
Gregg Williams
director, owner
$2.0M
1,351,351 shares
+5%
56Moderate
VANIbuy
Vivani Medical, Inc.
Gregg Williams
director, owner
$2.0M
1,737,765 shares
+7%
34Weak
VANIbuy 2
Vivani Medical, Inc.
Aaron Mendelsohn
director
$25k
20,000 shares
+12%
52Moderate
VANIbuy
Vivani Medical, Inc.
Gregg Williams
director, owner
$2.0M
1,737,764 shares
+8%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Gregg Williams bought $2.0M of VANI | InsiderTell