George Whitesides: stock trades

Activity

Would copying George Whitesides’s trades have beaten the S&P 500?

Copying George Whitesides’s disclosed holdings (starting from the holdings in each annual disclosure report once it was published, then adding purchases and taking off sales as each trade report became public, sized by the amounts reported, with call options counted as the stock until they expired) would have turned $10,000 on August 14, 2025 into $11,005 by November 2, 2026, against $11,889 in the S&P 500: +8.2% a year against +15.3%, with a beta of 0.47. Many of George Whitesides’s trades are not share purchases, so only 0 share purchases can be judged trade by trade, too few to rank. Reports arrived a median of 30 days after the trade.

Return a year, copying

+8.2%

S&P 500, same dates

+15.3%

Yearly swing (S&P 500)

10% (12%)

Sharpe ratio (S&P 500)

0.45 (0.90)

Biggest drop (S&P 500)

−7% (−9%)

Market sensitivity (beta)

0.47

“Average vs S&P 500” is the stock’s return including dividends minus the index’s over the same dates. For sales, a negative figure means the stock lagged after it was sold, so selling was the right call (green). “Went the right way” is the share of purchases that beat the index, or of sales that trailed it. The t-statistic treats each trade as a separate bet; the Evidence label is stricter and uses one average per month of reports, because trades bunch together. Trades in companies we cover only. The averages count share trades; the copy portfolio also counts call options as the stock and sizes positions by the middle of each band filed. No trading costs or taxes. These are the stocks’ moves after each trade: they say nothing about why George Whitesides traded and do not suggest the use of non-public information. How every member compares.

Stocks traded

Every company we cover that appears in the reports. “Since first purchase” is the stock’s move from the close on the member’s first disclosed purchase to the latest close, against the S&P 500; it is not the member’s return.

Trades in companies we cover

“Stock since trade” is the share price move from the close on the trade date to the latest close, with the gap to the S&P 500 beneath. It describes the stock, not what the member made. Click a column heading to sort.

Filings

• Report filed Aug 13, 2025 1 stock or option trade · PL
• Report filed Apr 23, 2025 34 stock or option trades · AEP, BAC, CB, C, KO, CMCSA, HD, INVA, INTC, JNJ, JPM, LIN