MarketPeel
Insider Trading Intelligence
SV

Stavros G. Vizirgianakis

XTNT
DIRECTOR · XTANT MEDICAL HOLDINGS, INC. · CIK 0001559834
FILING MIX · LIFETIME92%/8%
BUYS
23
SELLS
2
TOTAL VALUE
$1.09M
COMPANIES
3
ACTIVE SINCE
Oct 2021
HOLDINGS NOW
9,728,409
AVG SELL PX
TRADE KIND
SHOWING 25 / 25
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
2 backtested trades · 8 horizons
Forward-return performance of every backtestable P/S trade by Stavros G. Vizirgianakis, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d2+100.00%+12.04%-1.42%+13.46%+13.46%
14d2+0.00%-8.87%+3.17%-12.04%-12.04%
30d2+0.00%-7.09%+4.73%-11.82%-11.82%
60d2+0.00%-20.57%+8.56%-29.12%-29.12%
90d2+0.00%-9.74%+5.05%-14.80%-14.80%
180d2+0.00%-9.22%+13.30%-22.52%-22.52%
1y2+100.00%+63.12%+20.26%+42.86%+42.86%
2y2+0.00%-7.80%+61.12%-68.92%-68.92%
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
XTNT · 7,515,570 shares · as of Nov 15, 2025
01,878,8933,757,7855,636,6787,515,570202320242025SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 23 buys / 2 sellsCOVERAGE · 19 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
APYX
APYX MEDICAL CORP
PURCHASEGRANT
Stock grant
450,0002,196,191Jun 11, 2026Jun 15, 2026View →
XTNT
XTANT MEDICAL HOLDINGS, INC.
PURCHASEGRANT
Stock grant
553,7977,515,570Nov 15, 2025Nov 18, 2025View →
APYX
APYX MEDICAL CORP
PURCHASEGRANT
Stock grant
128,000128,000May 15, 2025May 19, 2025View →
APYX
APYX MEDICAL CORP
PURCHASEGRANT
Stock grant
50,00050,000Jan 15, 2025Jan 17, 2025View →
XTNT
XTANT MEDICAL HOLDINGS, INC.
PURCHASEGRANT
Stock grant
243,2436,456,368Aug 15, 2024Aug 19, 2024View →
XTNT
XTANT MEDICAL HOLDINGS, INC.
PURCHASEGRANT
Stock grant
505,4056,961,773Aug 15, 2024Aug 19, 2024View →
APYX
APYX MEDICAL CORP
SALEGRANT
Stock grant
17,00017,000Aug 8, 2024Aug 12, 2024View →
XTNT
XTANT MEDICAL HOLDINGS, INC.
PURCHASEGRANT
Stock grant
42,34542,345Aug 15, 2023Aug 17, 2023View →
XTNT
XTANT MEDICAL HOLDINGS, INC.
PURCHASEGRANT
Stock grant
217,7706,213,125Aug 15, 2023Aug 17, 2023View →
XTNT
XTANT MEDICAL HOLDINGS, INC.
PURCHASEGRANT
Stock grant
144,6395,995,355Nov 15, 2022Nov 17, 2022View →
XTNT
XTANT MEDICAL HOLDINGS, INC.
PURCHASE
566,214566,214Oct 7, 2022Oct 11, 2022View →
XTNT
XTANT MEDICAL HOLDINGS, INC.
PURCHASE
2,264,861$0.48$1.09M5,850,716Oct 7, 2022Oct 11, 2022View →
XTNT
XTANT MEDICAL HOLDINGS, INC.
PURCHASEGRANT
Stock grant
70,7763,585,855Aug 25, 2022Aug 26, 2022View →
BVS
BIOVENTUS INC.
PURCHASEGRANT
Stock grant
16,64816,648Jun 17, 2022Jun 22, 2022View →
BVS
BIOVENTUS INC.
PURCHASE
9652,781,888Jun 16, 2022Jun 22, 2022View →
BVS
BIOVENTUS INC.
SALE
9651,930Jun 16, 2022Jun 22, 2022View →
BVS
BIOVENTUS INC.
PURCHASEGRANT
Stock grant
2,780,9232,780,923Oct 29, 2021Apr 28, 2022View →
BVS
BIOVENTUS INC.
PURCHASEGRANT
Stock grant
347,323347,323Oct 29, 2021Nov 2, 2021View →
BVS
BIOVENTUS INC.
PURCHASEGRANT
Stock grant
89,00189,001Oct 29, 2021Nov 2, 2021View →
BVS
BIOVENTUS INC.
PURCHASEGRANT
Stock grant
6,5446,544Oct 29, 2021Nov 2, 2021View →
BVS
BIOVENTUS INC.
PURCHASEGRANT
Stock grant
34,90534,905Oct 29, 2021Nov 2, 2021View →
BVS
BIOVENTUS INC.
PURCHASEGRANT
Stock grant
19,63419,634Oct 29, 2021Nov 2, 2021View →
BVS
BIOVENTUS INC.
PURCHASEGRANT
Stock grant
2,8952,895Oct 29, 2021Nov 2, 2021View →
BVS
BIOVENTUS INC.
PURCHASEGRANT
Stock grant
26,17926,179Oct 29, 2021Nov 2, 2021View →
BVS
BIOVENTUS INC.
PURCHASEGRANT
Stock grant
261,794261,794Oct 29, 2021Nov 2, 2021View →
Other insiders · XTNT
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About this filer
CIK 0001559834
ROLE
Director
PRIMARY
XTNT
COMPANIES
3
ACTIVE SINCE
Oct 2021
MARKETPEEL · /INSIDER/0001559834DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

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