Butterfly Network enters the back half of September with a dramatic week behind it — the stock jumped 27% in five sessions to $9.93, yet short sellers show no sign of retreating and a fresh analyst initiation landed the same day the rally peaked.
The analyst catalyst is the week's clearest trigger. Needham initiated coverage on September 22 with a Buy rating and a $10 target, arriving just as the stock closed at $9.93 — leaving almost no implied upside at current levels. TD Cowen had reiterated its Buy and its own $10 target on September 11, so the Street is aligned directionally but not meaningfully bullish on price from here. The consensus is Buy, the mean target is $10.50, and the stock is already trading through most of that range after the weekly surge. EPS surprise ranks in the 87th percentile — the company has a strong track record of beating estimates — and the forward EPS growth factor scores in the 95th percentile, reflecting analyst expectations for a sharp improvement from the current deeply loss-making base. Against that, the valuation picture offers little comfort: the P/E is deeply negative and EV/EBITDA has deteriorated sharply over the past 30 days, a reminder that this remains a story driven by growth expectations, not current earnings power.
Short positioning is the sharpest tension on the stock. Short interest held almost exactly flat through the week at 15.1% of free float — roughly 34.1 million shares — even as the stock ran 27%. That means shorts did not cover into the squeeze. Days to cover runs nearly eight sessions, and the ORTEX short score is elevated at 67.7, up from 64.7 two weeks ago, reflecting growing pressure in the positioning. Borrow availability eased slightly from above 200% in early September to 170% now, still in a range that is tight but not extreme — there remains enough supply in the lending pool for new short positions to be established. Cost to borrow is negligible at 0.52%, so the pain for existing shorts is a mark-to-market one, not a funding one. Options traders are not adding to the defensive pile: the put/call ratio has dropped sharply to 0.23 from above 0.27 last week, sitting 1.3 standard deviations below its 20-day average. That is the most bullish options posture of the past year on this metric, consistent with call buying into the momentum move.
The ownership register adds its own layer of complexity, with two active Schedule 13D filers on record. Jonathan Rothberg, the company's founder, holds roughly 8.4% of shares as last disclosed and filed a 13D/A amendment in mid-August. Larry Robbins (ROBBINS LARRY) filed his own 13D/A the same week, disclosing a stake that had fallen from 8.52% to 6.17% — and the insider trade log shows why: Robbins sold approximately 1.5 million shares between August 13 and August 17 at prices ranging from $8.70 to $9.54, realising around $13.4 million in proceeds. That selling ran alongside a smaller open-market purchase by director S. Louise Phanstiel, who bought 115,200 shares at $8.68 on August 14 for roughly $1 million — a rare insider buy in a tape dominated by sales. The Chief Business Officer also sold $1 million of stock on September 4 at $7.30, a price the stock has now surged well past. Note that all 13D/G positions are as last disclosed, and holders dropping below 5% may not file again. FMR (Fidelity) is the single largest institutional holder at 11.8%, having added 24 million shares in the most recently reported period, a notable accumulation that has not been widely flagged.
The next earnings print is due October 30. The last two quarterly releases produced muted one-day reactions of under 1%, but five-day drifts of 8% and 17% respectively — suggesting BFLY tends to move on follow-through rather than immediate reaction. With the stock already up over 160% year-to-date and short interest dug in at 15% of float, the October print becomes a test of whether the fundamental story can begin to support what is now nearly a $10 handle.
The setup to watch: whether short sellers begin to cover as the stock holds above the Needham target, or whether the absence of meaningful upside in analyst price objectives invites fresh selling pressure into a stock where the options market is tilting increasingly bullish.
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