Heh. Someone interested in my work.
Yes, I had been quietly compiling that. I didn’t think that it was that interesting…
So from the United States:
Colin S TANG, IMO 2019: gold, #1 / absolute winner
Daniel ZHU, IMO 2019: gold, #1 / absolute winner
Vincent HUANG, IMO 2019: gold, #11; Regeneron STS Finalist 2019; IMO 2018: gold, #10; IMO 2017: silver, #103
Adam ARDEISHAR, IMO 2018: silver, #61; Regeneron STS Finalist 2019
Vincent W BIAN, IPhO 2019: gold, #6
Sanjay RAMAN, IPhO 2019: silver, #44
Anton Z NI, IChO 2019: gold #28
Edward JIN, IChO 2019: gold #30
Albert Cheng Liu, IChO 2019: silver, #59
none from the IBO 2019
Benjamin QI: IOI 2019, absolute winner (second time), gold, #1; 2018: absolute winner, gold, #1
**Regeneron STS 2019/b:
Adam ARDEISHAR as mentioned above
Grace CAI
Adjali CHADHA
Samuel FERGUSON
Vincent HUANG as mentioned above
Preeti KRISHNAMANI
Gabrielle LIU
Natasha MANIAR
Kevin QIAN
Ronak ROY
Justin SCHIAVO
Julia SITU
USAMO Finalists other than IMO people
Kevin J LIU
Carl SCHILDKRAUT
Guanpeng XU
Selective internationals:
CANADA
Victor RONG: IMO 2019: gold, #41; IMO 2018, silver, #61; IMO 2017: silver, #115. USAMO 2019 finalist.
William ZHAO: IMO 2019: bronze, #267; IMO 2018: silver, #49; IMO 2017: gold, #14; IMO 2016: gold, #41
In the last three years, these two have taken the top three places regularly in the Canadian Mathematical Olympiad
Michelle Rui Yang GUO: IBO 2018: bronze #105
Issaac C LIAO: IPhO 2019: silver, #81; IPhO 2018: honorable mention, #229
Sean H WANG: IChO 2018: bronze, #153
INDIA
Aparna Ajit GUPTE: IOL 2019: bronze, #42; IOL 2018: silver, #26
Stuti KHANDWALA: IBO 2018: silver, #37; IBO 2017: silver, #36
Dhyey S GANDHI: IChO 2019: gold, #9; IChO 2018: gold, #26; IChO 2017: silver, #58 (+ 4x IJSO gold)
ALBANIA
Aleksia KOLO: IMO 2018: honorable mention, #391; EGMO 2019: bronze #57; EGMO 2018: honorable mention #109; EGMO 2017: honorable mention #96
HUNGARY
Milan HAIMAN: IMO 2019: gold, #8; USAMO 2019 Finalist
TAIWAN
Shih-Yu WANG: IMO 2018: gold, #4; IMO 2017: silver, #72; IMO 2016: silver, #45
ESTONIA
Richard LUHTARU: olympiad medals across 6 major international contests, enumerated by year: IOI 2019: silver #75; IMO 2019: bronze, #168; IPhO 2019: silver, #43; IOI 2018: bronze, #111; IMO 2018: silver, #111; IPhO 2018: silver, #65; IOAA 2018: gold; IMO 2017: silver, #115; IMO 2016: honorable mention, #312; IBO 2016: silver IMO 2015: honorable mention, #420; IJSO 2015, gold medal.
I really haven’t had a lot of time to work on the data, sorry 
(e.g., USABO National Finalists, USNCO National Finalists, US Physics Team, USACO Finalists, Siemens, previous years…)