RANKED: These are the most and least reputable drug companies in the world

Bristol-Myers Squibb, the New York-based pharmaceutical company known for its diabetes and heart-related drugs, didn't have much of a change in perceived reputation in 2016 compared to 2015. BMS reputation scores were particularly low when it came to the company's leadership and innovation reputation.

Switzerland-based Novartis rounds out the bottom three with a slightly higher reputation than last year. Novartis' reputation score was brought down by lower governance and citizenship scores.

GlaxoSmithKline, headquartered in the UK, raised its RepTrack score in 2016. One reason for this is that survey respondents said they perceived the company as having better overall performance and innovation.

AbbVie, the North Chicago-based company that spun out of Abbott Laboratories in 2013, was one of the two additions to this year's Reputation Institute report. It scored its lowest reputational rankings in products and services, leadership, and performance.

People's perceptions of the reputation of Eli Lilly, the Indianapolis-based company known for its diabetes medications, didn't change too much from 2015 to 2016.

AstraZeneca is a British-Swedish pharmaceutical company known most widely for its acid reflux medication Nexium. Its reputation scores were relatively middle of the road across the reputational subcategories.

Allergan, the other newcomer to the Reputation Institute list and the maker of Botox, spent much of its first quarter with plans for a mega-merger with Pfizer. Nevertheless, survey respondents said they did not see the company as very innovative, and these low ranking reduced the company's overall score.

Sanofi, a French company known in part for its diabetes medicines and vaccine program, rose through the reputation ranks from #10 in 2015 to #6, scoring particularly high in terms of how people perceived its workplace.

New Jersey-based Merck jumped from #11 to #5 in 2016. The makers of Gardasil, the vaccine designed to protect against the sexually transmitted infection HPV, and the drug accredited with helping former President Jimmy Carter get cancer-free, consistently scored high in all of the reputational subcategories.

Swiss pharmaceutical company Roche was one of the best-known companies of the bunch. Roche has its hands in a lot of cancer research, most recently seeing the approval of a bladder cancer drug and putting in major investments in technology companies.

Novo Nordisk, a Danish pharmaceutical company, dominated the Reputation Institute's reputational subcategories of citizenship, governance, and innovation, bumping its reputation ranking from #7 in 2015 to the #3 spot this year.

Abbott Laboratories, which makes everything from nutrition products to diabetes monitoring systems, came in second in terms of its overall reputation.

Bayer, the German company that has its hands in everything from pharmaceuticals to consumer products like Aspirin and Alka Seltzer to agriculture products, came out on top as the only company on the list with a "strong" reputation (as opposed to average).

Bayer dominated the Reputation Institute's reputational subcategories of leadership, performance, products/services, and workplace.