Invest1 publisher2 min readPublished
Sixty pre-IPO unicorns deferred an average $358 million of stock comp into their listing quarter
Sven Riethmueller's Yale working paper counts the deferred RSU expense in 91 US unicorn listings from 2014 to 2024. Firms carrying $107 million or more of it fell 83% of the time once the first public quarter printed.
The Investor · Invest desk

What happened
- Yale Law School professor Sven Riethmueller's working paper, "Beetles with Ballooning Burdens", examines how 91 US unicorns that listed between 2014 and 2024 timed their stock-compensation expense.
- Sixty of the 91 recognized an average of $358 million of deferred stock-based compensation, adjusted for inflation, at the time of their IPOs.
- Eight of the companies each pushed more than $1 billion of pre-IPO compensation cost out to the listing.
- Companies carrying $107 million or more of deferred stock compensation faced an 83% probability of a share-price decline after reporting their first quarterly results as public companies.
- Riethmueller's earlier 2024 research identified 147 stock options granted during IPO preparation at median discounts of 48% to the eventual IPO price, half of them within 45 days of trading.
Compiled by The InvestorSomething wrong?How this is made
Why it matters
- constraint The screen requires someone to read S-1 footnotes before pricing, and Cryptobriefing says institutions have the resources for that while retail buyers typically work with less information and less time.
- contradiction The same write-up calls the 83% figure a probability in one paragraph and a correlation in another, and the difference decides whether a buyer can predict with it or only size a charge with it.
- precedent Because the standards permit the deferral, the next cohort of listings can carry the same gap between roadshow margin and first-print margin until the recognition rule changes.
Sixty firms at an average of $358 million each is about $21.5 billion of compensation expense landing in 60 first quarterly reports [2][1]. Set the average against the sample's median pre-money valuation of $11.4 billion and it comes to roughly 3.1% of the private price [4][2]. On its own, that is a charge a stock can absorb. The line Riethmueller draws is at $107 million of deferred expense, and the average deferrer in his sample sits 3.3 times above it [6][3].
The figure is in the filing. Cryptobriefing's account of the paper says institutional investors with the resources to dig into S-1 filings can use deferred RSU expense as a screening tool, while retail investors typically work with less information and less time [10]. Grants happen before the listing, and the accounting lets the expense wait for the IPO quarter, so the margin in the roadshow is wider than the margin that prints [7][8]. Cryptobriefing describes the sequence that follows: the charge appears, operating margins crater, the stock drops, and retail investors who bought at or near the IPO price absorb the loss [9]. The write-up does not report share counts or dilution [7].
Two other readings of the 83% get there without insider design. Deferral size may track price, and at least 30 of these companies held post-money valuations of $11 billion or more [5]. Thirty-one of the 91 sit outside the deferring group [4]. If those 31 declined at a similar rate after their own first print, the footnote tells a buyer only how big the charge is. Cryptobriefing's write-up also calls the 83% a probability in one paragraph and a correlation in another [6][14].
Riethmueller's 2024 options work points the same way from the other end. A strike set 48% below the eventual offer price is 52% of it, a 92% gain at the offer before the shares trade anywhere [11][5]. He put the average potential windfall at $4.2 million per firm [13].
In my view the usable part is narrow. For any listing whose S-1 footnotes show a deferred RSU charge near or above $107 million, the first public earnings report, not the offer, is where the margin gets set [6]. Waiting one quarter costs a buyer the 17% of cases in the sample where the stock did not decline [6]. What would break the thesis is a control group: publish the post-print returns of the 31 non-deferrers, and if they fall at anything like 83%, the screen is measuring how 2014 to 2024 listings seasoned and the footnote only sizes the charge [4].
What to watch
- Whether the published version of the paper reports how the 31 unicorns outside the deferring group traded after their own first quarterly print.
- Any FASB or SEC move on RSU recognition timing. A rule change would pull the charge back before the roadshow instead of after it.
- Whether the next large US listings disclose deferred RSU expense above the $107 million mark in their S-1 footnotes.