Years be­fore $43B Pfiz­er deal, a mys­tery com­pa­ny made six pro­pos­als for Seagen

Be­fore Seagen’s $43 bil­lion deal to be ac­quired by Pfiz­er last month, the biotech com­pa­ny had re­ceived takeover of­fers go­ing back to at least 2019, ac­cord­ing to a new fil­ing that pro­vides a play-by-play look at one of the biggest M&A deals in re­cent in­dus­try his­to­ry.

The lead-up to the $43 bil­lion merg­er was filled with mul­ti­ple at­tempts by one drug­mak­er to buy Seagen, an ef­fort that ul­ti­mate­ly fell apart over price and that was punc­tu­at­ed by the ar­rest of the biotech’s then-CEO Clay Sie­gall on al­le­ga­tions that he as­sault­ed his wife. And af­ter Sie­gall’s ouster, the fil­ing de­tails a con­test be­tween ri­val drug­mak­ers — one of which ap­pears to be Mer­ck — that ul­ti­mate­ly end­ed with Pfiz­er win­ning the deal.

Unlock this article instantly by becoming a free subscriber.

You’ll get access to free articles each month, plus you can customize what newsletters get delivered to your inbox each week, including breaking news.

SIGN UP LOG IN BECOME A PREMIUM SUBSCRIBER