Stoch is among only three ski jumpers in history, alongside Sven Hannawald and Ryoyu Kobayashi, to win the "grand slam" of all four competitions in a single Four Hills Tournament.

In 2018, at age 30, Stoch became the oldest individual Olympic gold medallist and World Cup titlist in the history of ski jumping.

At the 2010 Winter Olympics in Vancouver, British Columbia, Canada, the Polish ski jumping team was led by Adam Małysz (who would win the silver medal in both individual events).

On 23 January 2011 on Wielka Krokiew in Zakopane, Poland – he won a World Cup competition for the first time in his career.

He was the fourth Polish ski jumper after Stanisław Bobak, Piotr Fijas and Adam Małysz, who won a World Cup competition.

On 22 February 2011, he won the third title of Polish Champion in Szczyrk, where he jumped twice at 101.5 m. During World Cup in Lahti, Finland, he gains third place with the team again.

The next day of the competition on Trampolino dal Ben jumped a distance of 125,5 mi 131.5 m, which gave him the victory before Gregor Schlierenzauer and Anders Bardal.

He lost 162 points to the best aviator season – Robert Kranjec, but he stood on the podium one contest flight – was third in Tauplitz.

On 25 January 2013, he became the joint holder of the Polish ski flying distance record (tying the mark held by Piotr Żyła) with a jump of 232.5 metres.

Stoch, in post-competition interviews, stated that he is very unhappy with the obtained result – despite the relaxation made a mistake during the jump.

In the first series of the competition, he showed the longest jump of 131.5 m and earned high marks for style, including the "20" from the Swiss judge.

In the final series, like most of the top competitors, he competed with reduced at the request of the coach – the nineteenth beam.

Stoch jumped 130 m, again without providing any judicial note below "19" and won the gold medal with 6.1 points more than Peter Prevc, but about 6.7 from the third Anders Jacobsen.

[2] On 2 March 2013, Stoch participated in the team competition on the large hill, which was submitted to the fourth group of players.

The second started at the request of head coach Łukasz Kruczek, with a reduction of two positions beams and reached 130 meters.

On 9 February 2014, after qualifying easily in the first competition on the normal hill, he then landed the longest jumps in both rounds of the finals to win the title of Olympic Champion 2014.

[5] He won by 12.7 points, the fourth-largest margin of victory in a men's normal hill at the Winter Olympic Games.

On 15 February 2014 – Kamil Stoch won his second gold medal, this time on the large hill, becoming the third man in history to win both hills individual events in single Olympics after Matti Nykänen in Calgary 1988 and Simon Ammann in Salt Lake City 2002, Vancouver 2010.

Kamil Stoch sustained an ankle injury before the FIS World Cup opening in Klingenthal, which prevented him from participating in the first competitions of the season.

On 21 March 2015, set a new Polish record of ski flying with a jump of 238 metres at Letalnica, Planica during the trial round.

[14] On 11 December 2016, he achieved his 16th victory in World Cup competition ahead of the second Maciej Kot with predominantly 0.6 a point.

In the windy competition in Innsbruck, he took fourth place, and the overall was second with a loss to leader Daniel Andre Tande 1.7 points.

In the three-part competition, he became the ski flying World Championships runner-up behind Daniel Andre Tande from Norway and beat German Richard Freitag in the third part.

[22][23] The next day, Stoch and his teammates Hula, Kubacki, and Żyła, won the first ever medal, a bronze, for Poland in ski flying in team competition.

On 17 February 2018, he won a gold medal ahead of Andreas Wellinger and Robert Johansson at large hill.

[27][28] On 19 February 2018 Stoch and his teammates Maciej Kot, Stefan Hula and Dawid Kubacki achieved first medal in Olympic team competition for Poland.

[29] Kamil Stoch started at Olympic Games four times – in Turin 2006, Vancouver 2010, Sochi 2014 and PyeongChang 2018.

He is the third man in history to win both hills individual events in single Olympics after Matti Nykänen in Calgary 1988 and Simon Ammann in Salt Lake City 2002, Vancouver 2010.