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Top Stock Gainers May 2021 - Monthly Performance Ranked

Discover the best stocks of May 2021 ranked by monthly performance. Find out which public companies delivered the highest returns this month, with market caps over $100 million on Nasdaq and NYSE.
2021

This ranking shows the best performing stocks during May 2021, calculated from the first to the last trading day of the month. Using split-adjusted data ensures accurate performance calculations.

Monthly performance rankings help identify short-term momentum and sector rotation patterns that may not be visible in longer timeframes. These rapid movers often present opportunities for traders and momentum investors.

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Data as of March 18, 2026 at 11:55 PM EDT

Rank
Symbol
Company Name
May Gain
Market Cap
Price
Country
Sector
1901
-14.83%
1.36 B
$ 16.61
United States
Consumer Cyclical
1902
-15.05%
536.95 M
$ 40.05
United States
Basic Materials
1903
-15.23%
16.73 B
$ 18.22
United States
Technology
1904
-15.32%
4.12 B
$ 78
United States
Consumer Cyclical
1905
-15.47%
2.76 B
$ 63.42
United States
Consumer Cyclical
1906
-15.51%
562.14 M
$ 25.52
United States
Consumer Cyclical
1907
-15.85%
2.17 B
$ 18.3
China
Communication Services
1908
-15.88%
6.14 B
$ 41.8
United States
Consumer Cyclical
1909
-16.06%
3.49 B
$ 17.43
Canada
Basic Materials
1910
-16.2%
1.34 B
$ 56.28
United States
Industrials
1911
-16.43%
13.27 B
$ 338.24
United States
Healthcare
1912
-16.62%
5.56 B
$ 4.02
Chile
Utilities
1913
-16.62%
3.17 B
$ 37.07
United States
Technology
1914
-16.87%
850.64 M
$ 16.35
United States
Real Estate
1915
-16.89%
206.90 M
$ 12.9
United States
Basic Materials
1916
-17.49%
1.64 B
$ 56.4
United States
Healthcare
1917
-17.5%
21.43 B
$ 75.03
Chile
Basic Materials
1918
-17.59%
992.18 M
$ 5.86
United States
Consumer Defensive
1919
-18.23%
1.01 B
$ 3.95
United States
Healthcare
1920
-18.58%
464.17 M
$ 7.25
United States
Industrials
1921
-18.62%
594.66 M
$ 14.45
United States
Technology
1922
-18.99%
760.51 M
$ 11.35
United States
Basic Materials
1923
-19.28%
401.09 M
$ 6.98
United Kingdom
Technology
1924
-20.51%
1.15 B
$ 30
United States
Industrials
1925
-20.77%
5.99 B
$ 103.22
United States
Healthcare
1926
-21.01%
6.69 B
$ 45.64
United States
Industrials
1927
-21.18%
152.87 M
$ 3.49
United States
Basic Materials
1928
-21.29%
40.13 B
$ 14.23
United States
Financial Services
1929
-22.13%
5.31 B
$ 17.04
China
Consumer Cyclical
1930
-22.35%
10.56 B
$ 352.19
United States
Industrials
1931
-23.08%
672.09 M
$ 7.6
United States
Consumer Defensive
1932
-24.08%
1.96 B
$ 67.43
Greece
Industrials
1933
-24.14%
7.62 B
$ 15.46
China
Consumer Cyclical
1934
-24.19%
807.69 M
$ 4.64
United States
Consumer Cyclical
1935
-26.17%
580.43 M
$ 25.2
United States
Consumer Defensive
1936
-26.48%
6.00 B
$ 8.08
United States
Real Estate
1937
-26.61%
345.08 M
$ 8.05
United States
Technology
1938
-27.21%
2.78 B
$ 22.21
United States
Healthcare
1939
-27.82%
1.00 B
$ 6.3
United Arab Emirates
Technology
1940
-28.8%
6.81 B
$ 11.19
China
Consumer Defensive
1941
-28.83%
102.69 M
$ 2
China
Consumer Defensive
1942
-32.25%
9.43 B
$ 56.54
China
Consumer Defensive
1943
-34.43%
107.54 M
$ 0.61
United States
Financial Services
1944
-37.6%
481.68 M
$ 1.99
China
Consumer Defensive
1945
-81.66%
757.45 M
$ 6.49
United States
Financial Services
1946
-100%
2.16 B
$ 25.34
For the most accurate results, consider cross-referencing our data with other sources.