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Page built 2026-09-29
Data as of 2026-09-29
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DURCAN DERMOT MARK: insider trades

Every open market trade DURCAN DERMOT MARK 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

  • DURCAN DERMOT MARK is listed as Director at COR.
  • Between 2026-05-28 (28 May 2026) and 2026-06-22 (22 June 2026) DURCAN DERMOT MARK filed 2 open market buys worth $2.2M and 0 open market sales worth $0.
  • Across 2 scored buys, DURCAN DERMOT MARK averaged +12.2% 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 draw a conclusion.
  • Data as of 2026-09-29 (29 September 2026).
Open market buys 2 $2.2M
Open market sales 0 $0
Avg vs S&P, 90d +12.2% 2 scored buys
Beat the S&P 100% 90 days after entry

Would copying DURCAN DERMOT MARK have paid?

prices as of 2026-09-28

The result. Across 2 scored buys, DURCAN DERMOT MARK averaged +12.2% 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 draw a conclusion.

Average return of DURCAN DERMOT MARK's open market buys against the S&P 500.
Days after entryScored buysAvg vs S&PBeat S&PEntry monthst statisticReading
30 days 2 +8.8% 100% 2 n/a too few trades to draw a conclusion
90 days 2 +12.2% 100% 2 n/a too few trades to draw a conclusion
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. DURCAN DERMOT MARK does not have enough yet.

Stocks traded

  1. COR2 trades, $2.2M

Every open market trade

as of 2026-09-29
2 trades.
Open market trades filed by DURCAN DERMOT MARK, newest first.
FiledStockTypeSharesPriceValue90 day vs S&P
22 Jun 2026 COR buy 4,000 $274.19 $1.1M +7.1%
28 May 2026 COR buy 4,000 $266.26 $1.1M +17.3%

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

Frequently asked questions

What has DURCAN DERMOT MARK bought and sold?

Between 2026-05-28 (28 May 2026) and 2026-06-22 (22 June 2026) DURCAN DERMOT MARK filed 2 open market buys worth $2.2M and 0 open market sales worth $0.

Did DURCAN DERMOT MARK's buys beat the market?

Across 2 scored buys, DURCAN DERMOT MARK averaged +12.2% 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 draw a conclusion. 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.