Upstart shorts own 33% of the stock; bond buyers demanded a thicker cushion on its $400 million loan deal
On September 28, KBRA rated $400 million of Upstart loan paper with 65.30% protection in front of the senior notes, and the September 15 short print shows bears holding a third of the float. The bond market and the borrow market have priced the same loan book in opposite directions, and the November 3 report tests which read survives.
Vincent Jiang · 3 min read
Two markets are pricing the same loan book
On September 28, 2026, KBRA assigned preliminary ratings to Upstart Securitization Trust 2026-4, a $400.0 million deal of notes against an approximately $500.0 million pool of consumer loans, the 52nd Upstart-platform securitization−0.70% — Upstart-platform securitization, down 0.70 percent today 1. Senior notes carry 65.30% credit enhancement, the thinnest class 20.50% 1. Short sellers were there first: the September 15 print, published October 7, shows 33.13% of the float sold short, 27,649,788 shares, up 6.56% since August 31 and needing 6.86 days of volume to cover 2.
The pool got riskier and the cushion got thicker
Deal 51 sets the baseline: rated on June 23, 2026, UPST 2026-3 was $320.005 million of notes against an approximately $400.0 million pool at 64.75% senior enhancement 3.
Senior protection rose 55 basis points on a bigger pool with more grade E loans
- UPST 2026-3
- UPST 2026-4
Data
| UPST 2026-3 | UPST 2026-4 | |
|---|---|---|
| Class A | 64.75% | 65.3% |
| Class B | 51.05% | 51.6% |
| Class C | 40.7% | 41.15% |
| Class D | 20.5% | 20.5% |
Deal 52 is a quarter larger by notes and leans lower in credit quality: grade E loans are 47.1% of the pool against 43.3% in deal 51 4. For the same ratings, KBRA demanded a thicker cushion: 55 basis points more on the senior classes, 55 more on B, 45 more on C, the same 20.50% on D 13. More risk in the pool is answered with more protection in front of the notes.
The bears' exhibit is Upstart's own macro gauge
Upstart's macro index printed 1.49 on October 5, 2026, roughly 49% above what the company calls a normal economy, above 1.0 since early 2022 and below its 2024 peak of 1.68 5. September originations were $1,378.3 million after August's $1,342.1 million; the third quarter totaled $4,117.8 million 56. Management kept its roughly $1.4 billion revenue guidance only after noting the index sat at the top of the 1.40 to 1.50 band framing its outlook 7.
The founders bought and the loan-book president sold
Over six months, founder Dave Girouard bought $4,999,606 of stock and chief executive Paul Gu bought $2,652,500 2. Over the same stretch, president Sanjay Datta sold $4,531,373 across eight sales 2.
Upstart's founders bought $7.7M of stock in six months while its president sold $4.5M
Data
| Value | |
|---|---|
| Dave Girouard | $5M |
| Paul Gu | $2.65M |
| Sanjay Datta | -$4.53M |
| Andrea Blankmeyer | -$0.51M |
| Scott Darling | -$0.45M |
| Natalia Mirgorodskaya | -$0.09M |
Datta is the executive quoted welcoming new lending partners in the October 7 Credit Union of Denver announcement, a credit union originating through Upstart since April 8. Motives are not on any tape. The split is.
What the defense rests on
The defense rests on the second quarter: originations of $4.2 billion, revenue of roughly $365 million up 42% year over year, GAAP net income of roughly $17 million, and loans on the balance sheet down to 5.9% of outstanding principal, the lowest in almost two years 7. The shares closed at $24.10 on October 9 against a 52-week range of $22.56 to $55.22, down more than 70% from last July's peak 91011. One automated screener still calls it unprofitable 10, a label that quarter contradicts.
Two prints decide which price is right
Third quarter results land on November 3, 2026 12. The shorts need 6.86 days of volume to exit 2, which points to a crowded door rather than a quiet one. Both markets have priced Upstart credit in public: one with collateral, one with borrowed shares. If the print holds guidance against a 1.49 macro read and the 53rd securitization prices at or below 65.30% senior enhancement, the bond market's read stands. If that cushion climbs again or the shelf goes quiet, the shorts have it.
Deepdive
AI-generated from this story and its cited sources. Not investment advice.
