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Data as of 2026-09-29
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Grigorios Siokas: insider trades

Every open market trade Grigorios Siokas has filed with the SEC, when each filing appeared, and how the buys did against the S&P 500 once the filing was public.

Key Facts

  • Grigorios Siokas is listed as Chief Executive Officer at COSM.
  • Between 2026-06-12 (12 June 2026) and 2026-07-31 (31 July 2026) Grigorios Siokas filed 4 open market buys worth $415K and 0 open market sales worth $0.
  • Across 1 scored buy, Grigorios Siokas averaged +5.7% against the S&P 500 (SPY) over the 90 days after disclosure, with 100% of them ahead of the index. That result is too few trades to tell.
  • Data as of 2026-09-29 (29 September 2026).
Open market buys 4 $415K
Open market sales 0 $0
Avg vs S&P, 90d +5.7% 1 scored buys
Beat the S&P 100% 90 days after entry

Would copying Grigorios Siokas have paid?

prices as of 2026-09-28

The result. Across 1 scored buy, Grigorios Siokas averaged +5.7% against the S&P 500 (SPY) over the 90 days after disclosure, with 100% of them ahead of the index. That result is too few trades to tell.

Average return of Grigorios Siokas's open market buys against the S&P 500.
Days after entryScored buysAvg vs S&PBeat S&PEntry monthst statisticReading
30 days 3 +4.3% 67% 3 n/a too few trades to draw a conclusion
90 days 1 +5.7% 100% 1 n/a too few trades to tell
180 days 0 n/a n/a n/a n/a too few trades to tell

A return curve needs at least 10 scored buys. Grigorios Siokas does not have enough yet.

Stocks traded

  1. COSM4 trades, $415K

Every open market trade

as of 2026-09-29
4 trades.
Open market trades filed by Grigorios Siokas, newest first.
FiledStockTypeSharesPriceValue90 day vs S&P
31 Jul 2026 COSM buy 349,825 $0.20 $70.0K n/a
30 Jul 2026 COSM buy 766,284 $0.18 $140K n/a
12 Jun 2026 COSM buy 218,447 $0.21 $45.0K +5.7%
12 Jun 2026 COSM buy 701,447 $0.23 $160K +5.7%

Insider sales are shown but not scored, because they are often planned for tax or diversification reasons.

Frequently asked questions

What has Grigorios Siokas bought and sold?

Between 2026-06-12 (12 June 2026) and 2026-07-31 (31 July 2026) Grigorios Siokas filed 4 open market buys worth $415K and 0 open market sales worth $0.

Did Grigorios Siokas's buys beat the market?

Across 1 scored buy, Grigorios Siokas averaged +5.7% against the S&P 500 (SPY) over the 90 days after disclosure, with 100% of them ahead of the index. That result is too few trades to tell. Insider sales are not scored because they are often planned for tax or diversification reasons.

Sources: Insider trades: SEC Form 4 filings, collected from Finviz. Prices: Yahoo Finance daily adjusted closes. Data as of 2026-09-29 (29 September 2026). About these sources.

Not investment advice. Past disclosed trades do not predict future returns. Disclosures are published late, so the trades shown are ones you could only have copied after the fact. Talk to a licensed adviser before you invest.