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NEW YORK, May 27, 2021: Effective before the open on Thursday, June 3, 2021, Merck & Co. Inc. (Exchange: XNYS, Ticker: MRK) will spin-off to its shareholders Organon & Co. (Exchange: XNYS, Ticker: OGN). After the spin-off transaction, Merck & Co. will remain in the Dow Jones Industrial Average, and S&P Dow Jones Indices will apply a price adjustment to Merck & Co. and an adjustment to the index divisor.

The spin-off transaction won’t disrupt the level of the index. The divisor used to calculate the index from the components’ prices on their respective home exchanges will be changed prior to the opening on June 3. This procedure prevents any distortion in the index’s reflection of the portion of the U.S. stock market it is designed to measure. The new divisors can be found in the end-of-day index level files (*.SDL) via the S&P Dow Jones Indices FTP (EDX) site beginning on Wednesday, June 2, 2021.


S&P Dow Jones Indices is the largest global resource for essential index-based concepts, data and research, and home to iconic financial market indicators, such as the S&P 500 and the Dow Jones Industrial Average. More assets are invested in products based on our indices than products based on indices from any other provider in the world. Since Charles Dow invented the first index in 1884, S&P DJI has become home to over 1,000,000 indices across the spectrum of asset classes that have helped define the way investors measure and trade the markets.

S&P Dow Jones Indices is a division of S&P Global (NYSE: SPGI), which provides essential intelligence for individuals, companies, and governments to make decisions with confidence. For more information, visit


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