
SpringWorks Therapeutics (SWTX) saw the biggest retail follower increase among biotech stocks last week on Stocktwits, even as its shares tumbled more than 14%, marking their worst weekly decline since mid-January.
Despite the drop, retail sentiment flipped to 'bullish' from 'neutral,' driven by renewed speculation about German healthcare giant Merck KGaA (MKGAY) confirming details about a buyout.

According to The Fly, Barclays analyst Peter Lawson noted that some investors had anticipated confirmation of an acquisition from Merck's earnings report last week.
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However, Merck's annual report, published Thursday, only acknowledged that discussions about a potential merger were at an advanced stage but stated that there was no certainty a deal would be signed.
The absence of a definitive announcement left traders analyzing the language for clues.
Adding to speculation, SpringWorks canceled its planned appearance at Barclays' healthcare conference this week, continuing a pattern of event withdrawals following the FDA approval of its lead drug, Gomekli, for treating neurofibromatosis type 1 (NF1).
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The company had previously backed out of an earnings call and another public event, fueling investor theories that a significant corporate development was underway.
Barclays maintained an 'Overweight' rating on SpringWorks, with a price target of $63. It sees limited regulatory risk to a potential Merck buyout.
Retail traders on Stocktwits reacted strongly to these developments. Message volumes surged, and the company's follower count increased by 17.9%, the highest among all biotech stocks last week.
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Some investors speculated that an acquisition could be announced this week, with one suggesting a potential offer price of $120 per share — a 140% premium to SpringWorks' last closing price.
Another pointed to Merck not disclosing a termination of negotiations, which German law would have allegedly required if talks had ended, and reaffirmed their belief in SpringWorks' leadership.
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According to Koyfin, short interest in SpringWorks has declined from 15.7% at the start of the year to 12.2% last week, suggesting that bearish bets against the stock have been easing.
The company's shares currently trade at a 47% discount to the average analyst price target of $72.88. Five of the eight analysts covering SpringWorks have a ‘Buy’rating, while three rate it a ‘Strong Buy,’ according to Koyfin.
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Despite last week's sharp decline, SpringWorks remains up more than 36% year-to-date.
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