Well, after doing some reserach on this topic. Here is what I came up with regarding Andre's pinfall losses or losses that were of significane:
1989: IC Champion the Ultimate Warrior pinned (according to the History of WWE) at least 9 times in the autumn during the houseshows. Since there are many clashes between these two it is believed that Andre actually lost many more matches by pinfall since many of the results are unknown and WWF tend to have the same results for each town they went in to. (I've seen one of these matches so I can for sure say Warrior pinned Andre at least once)
31-jul-88 Andre lost to Hulk Hogan in a Steel-Cage-Match at the Wrestle Fest 88 event in Milwaukee, WI
29-mar-1987 Andre got pinned by WWF Champion Hulk Hogan at WM 3 in Michigan
17-jun-1986: Antonio Inoki forced Andre to submit in Nagoya, Japan, in a an IWGP Semi Final (This match do exist since I've seen the entire match)
12-feb-84 Andre loses to UWA Champion El Canek in a 2-Out-Of-3-Falls-Match at at UWA Show Naulcalpan, MEXICO (People claim it was by pinfall, But I have never seen the entire match, just clips)
? - ? - 1980-1982 Andre loses to Mid South Champion Jerry Lawler by Count Out in Louisville, KY for Mid-South. (Lawler confirms this in his book, that it was by CO, not by pin, but still go a lot of heat from Vince sr)
05-mar-78 Andre The Giant and Roy Welch loses to Ron Garvin by (According to the legend) pinfall in a Handicap-Match at a TV Taping in Knoxville, TN (However there are no footage of the entire match)
07-okt-76 Andre loses to Antonio Inoki in a Single-Match in Tokyo, when the referee stops the match
10-feb-74 Andre loses to The Sheik in a singles-Match in Toronto, when the referee stops the match (I've seen this match so I know for sur it took place)
18-dec-72 Andre for sure lost to Killer Kowalski in Quebec City, and according to legend it was by pinfall
31-maj-72 Andre for sure lost to Don Leo Jonathon in Montreal, and also here according to legend it was by pinfall
06-maj-72 Andre lost to Strong Kobayashi in the 4th-IWA-World-Series-FINAL in Morioka Japan. How Andre lost can only be speculated, but it is not entirely ruled out that he lost by pinfall
27-apr-71 Andre lost to Karl Gotch in Nagoya, Japan. According to sources it was by pinfall
Also it is to be assumed that Andre lost several times before these dates by pinfall, because he started his career in 1964, so it is highly unlikely that he did not lose a single match up to that point.
So with that said, so far Andre lost to
Warrior 9 times by pin
Hogan 1 time by pin, 1 time in a cage
Inoki 1 time by submission, 1 time by stoppage
El Canek 1 time by pin
Garvin 1 time by pin
The Sheik 1 time by stoppage
Kowalski 1 time by pin
Don Leo 1 time by pin
Gotch 1 time by pin
That is 16 known pinfall losses for a career that lasted for 28 years.
anyone who can add more to this topic?
