Laser Focus World is an industry bedrock—first published in 1965 and still going strong. We publish original articles about cutting-edge advances in lasers, optics, photonics, sensors, and quantum technologies, as well as test and measurement, and the shift currently underway to usher in the photonic integrated circuits, optical interconnects, and copackaged electronics and photonics to deliver the speed and efficiency essential for data centers of the future.

Our 80,000 qualified print subscribers—and 130,000 12-month engaged online audience—trust us to dive in and provide original journalism you won’t find elsewhere covering key emerging areas such as laser-driven inertial confinement fusion, lasers in space, integrated photonics, chipscale lasers, LiDAR, metasurfaces, high-energy laser weaponry, photonic crystals, and quantum computing/sensors/communications. We cover the innovations driving these markets.

Laser Focus World is part of Endeavor Business Media, a division of EndeavorB2B.

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Showcases the newest content from Laser Focus World, including photonics- and optics-based applications, components, research, and trends. (Daily)

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The latest in products within the photonics industry. (9x per year)

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The latest in products within the biophotonics industry. (4x per year)

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The latest in products within the laser processing industry. (3x per year)

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Laser Focus World produces a video newscast that gives a peek into what’s happening in the world of photonics.

Following the Photons: A Photonics Podcast

Following the Photons: A Photonics Podcast dives deep into the fascinating world of photonics. Our weekly episodes feature interviews and discussions with industry and research experts, providing valuable perspectives on the issues, technologies, and trends shaping the photonics community.

Editorial Advisory Board

  • Professor Andrea M. Armani, University of Southern California
  • Ruti Ben-Shlomi, Ph.D., LightSolver
  • James Butler, Ph.D., Hamamatsu
  • Natalie Fardian-Melamed, Ph.D., Columbia University
  • Justin Sigley, Ph.D., AmeriCOM
  • Professor Birgit Stiller, Max Planck Institute for the Science of Light, and Leibniz University of Hannover
  • Professor Stephen Sweeney, University of Glasgow
  • Mohan Wang, Ph.D., University of Oxford
  • Professor Xuchen Wang, Harbin Engineering University
  • Professor Stefan Witte, Delft University of Technology

Markel Group Inc. Common Stock (NY:MKL)

1,892.00 +10.79 (+0.57%)
Official Closing Price Updated: 7:00 PM EDT, Oct 17, 2025 Add to My Watchlist

Historical Prices

Date Open High Low Close Volume Change (%)
Oct 17, 2025 1883 1895 1879 1892 25,973 +10.79(+0.57%)
Oct 16, 2025 1895 1906 1870 1881 50,681 -35.27(-1.84%)
Oct 15, 2025 1941 1953 1907 1916 41,258 -39.64(-2.03%)
Oct 14, 2025 1930 1967 1930 1956 29,641 +27.01(+1.40%)
Oct 13, 2025 1924 1937 1913 1929 30,014 +12.15(+0.63%)
Oct 10, 2025 1953 1964 1917 1917 25,686 -29.03(-1.49%)
Oct 09, 2025 1950 1958 1929 1946 35,879 -9.34(-0.48%)
Oct 08, 2025 1976 1985 1950 1955 48,753 -10.27(-0.52%)
Oct 07, 2025 1968 1985 1949 1966 44,139 +7.62(+0.39%)
Oct 06, 2025 1950 1960 1933 1958 42,333 +16.95(+0.87%)
Oct 03, 2025 1922 1947 1921 1941 39,827 +20.28(+1.06%)
Oct 02, 2025 1885 1926 1877 1921 70,077 +35.32(+1.87%)
Oct 01, 2025 1913 1913 1883 1885 47,709 -25.93(-1.36%)
Sep 30, 2025 1894 1913 1890 1911 43,823 +10.81(+0.57%)
Sep 29, 2025 1914 1914 1890 1901 47,920 -13.52(-0.71%)
Sep 26, 2025 1916 1928 1906 1914 47,836 +9.76(+0.51%)
Sep 25, 2025 1924 1942 1900 1904 47,688 -24.40(-1.27%)
Sep 24, 2025 1924 1944 1920 1929 31,194 -9.92(-0.51%)
Sep 23, 2025 1917 1944 1917 1939 37,006 +15.57(+0.81%)
Sep 22, 2025 1930 1936 1910 1923 75,467 -11.89(-0.61%)
Sep 19, 2025 1945 1956 1933 1935 98,734 -9.65(-0.50%)
Sep 18, 2025 1932 1952 1928 1945 33,123 +16.76(+0.87%)
Sep 17, 2025 1925 1945 1920 1928 36,568 +10.63(+0.55%)
Sep 16, 2025 1917 1928 1904 1917 42,433 -9.08(-0.47%)
Sep 15, 2025 1953 1961 1924 1926 26,896 -27.78(-1.42%)
Sep 12, 2025 1954 1974 1953 1954 32,060 -9.96(-0.51%)
Sep 11, 2025 1926 1968 1925 1964 36,073 +43.29(+2.25%)
Sep 10, 2025 1931 1943 1914 1921 34,304 -8.11(-0.42%)
Sep 09, 2025 1924 1934 1922 1929 33,128 -0.43(-0.02%)
Sep 08, 2025 1910 1933 1895 1929 44,637 +17.15(+0.90%)
Sep 05, 2025 1957 1964 1906 1912 44,339 -46.05(-2.35%)
Sep 04, 2025 1960 1967 1950 1958 29,260 +7.70(+0.39%)
Sep 03, 2025 1931 1952 1925 1950 31,069 +2.47(+0.13%)
Sep 02, 2025 1948 1950 1928 1948 41,766 -11.05(-0.56%)
Aug 29, 2025 1957 1973 1956 1959 30,211 +4.17(+0.21%)
Aug 28, 2025 1958 1965 1951 1955 25,454 -3.35(-0.17%)
Aug 27, 2025 1940 1967 1936 1958 37,306 +13.67(+0.70%)
Aug 26, 2025 1962 1982 1932 1945 74,945 -33.88(-1.71%)
Aug 25, 2025 1994 1998 1974 1978 42,684 -13.87(-0.70%)
Aug 22, 2025 1980 2010 1975 1992 37,991 +22.93(+1.16%)
Aug 21, 2025 1960 1975 1960 1969 39,104 -2.45(-0.12%)
Aug 20, 2025 1975 1980 1958 1972 50,626 +16.40(+0.84%)
Aug 19, 2025 1919 1957 1918 1955 42,168 +33.08(+1.72%)
Aug 18, 2025 1926 1941 1919 1922 41,585 -5.64(-0.29%)
Aug 15, 2025 1954 1964 1928 1928 35,704 -26.15(-1.34%)
Aug 14, 2025 1963 1968 1948 1954 28,650 -8.45(-0.43%)
Aug 13, 2025 1930 1964 1930 1963 38,234 +35.00(+1.82%)
Aug 12, 2025 1910 1935 1910 1928 37,744 +22.90(+1.20%)
Aug 11, 2025 1916 1919 1899 1905 35,281 -5.72(-0.30%)
Aug 08, 2025 1910 1920 1900 1910 45,818 +12.08(+0.64%)
Aug 07, 2025 1960 1972 1893 1898 55,819 -57.40(-2.93%)
Aug 06, 2025 1940 1969 1940 1956 43,730 +17.16(+0.89%)
Aug 05, 2025 1954 1965 1928 1939 39,010 -7.84(-0.40%)
Aug 04, 2025 1933 1963 1932 1946 57,470 +16.55(+0.86%)
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