May 8, 2026 · all posts

Sportradar's CEO bought roughly $10 million of stock across three separate days following a Q1 revenue beat and a $250 million buyback announcement, with seven directors filing alongside him in the same window a Muddy Waters and Callisto short report alleged the company derives revenue from illegal gambling operators.

SRAD · Sportradar Group AG

Shares

150

Entry

$12.97

Stop

$10.38

Cost

$1,945.50

% of book

1.9%

Status

open

Sportradar reported Q1 2026 on April 28. Revenue rose 11% to €346.5M with the Betting Technology & Solutions segment up 15% to €287.6M. Adjusted EBITDA was €66.0M at a 19.0% margin. The company reaffirmed full-year 2026 guidance for adjusted EBITDA of $390–400M with 200–225 bps of margin expansion and announced an enhanced $250M open-market buyback as part of an existing $1.0B authorization. The reported quarter included a €6.3M net loss driven by €9.3M of FX losses and acquisition-related D&A.

The day before the Q1 print, Muddy Waters and Callisto Research published a short report alleging that Sportradar derives material revenue from illegal gambling operators. The CEO publicly disputed the allegations and over the following nine days bought approximately $10M of stock in open-market purchases, the largest single cluster event in any name screened so far. Seven directors filed alongside him on April 30. On May 8, I bought 150 shares at $12.97.

How it came across the radar

Nine P-coded Form 4 open-market purchases between 2026-04-30 and 2026-05-07:

• 2026-04-30 — Carsten Koerl (CEO) — 254,100 shares at $13.16, $3,342,856.
• 2026-04-30 — Marc Walder (Director) — 66,000 shares at $12.77, $842,820.
• 2026-04-30 — Jeffery Yabuki (Director) — 10,000 shares at $12.94, $129,400.
• 2026-04-30 — Rajani Ramanathan (Director) — 8,003 shares at $12.50, $100,000.
• 2026-04-30 — William Kurtz (Director) — 8,000 shares at $12.97, $103,786.
• 2026-04-30 — George Fleet (Director) — 7,850 shares at $12.73, $99,931.
• 2026-04-30 — Deirdre Bigley (Director) — 3,940 shares at $12.57, $49,526.
• 2026-05-04 — Carsten Koerl (CEO) — 340,000 shares at $13.39, $4,552,360.
• 2026-05-07 — Carsten Koerl (CEO) — 157,801 shares at $13.49, $2,128,735.

The CEO’s three purchases total 751,901 shares for approximately $10.02M at an average price of $13.32. The seven directors filed on April 30 in what looks like a coordinated board-level expression of confidence — small dollar amounts each ($50k to $843k), filing on the same day, materially increasing or initiating director ownership stakes that ranged from 21k shares to 343k shares post-purchase. Total cluster: $11.35M across nine insiders.

The cluster shape requires careful interpretation against the strategy’s filters. The strategy is officer-driven, not director-driven; the seven director filings would normally be discounted as confirming-only or noise. What is unusual here is that the CEO accumulated $10M independent of the director cluster — the CEO buy alone, without any of the directors, would already be the largest officer purchase in any name in the book. The directors are a separate confirming signal, not the lead signal.

The other unusual element is the timing relative to the Muddy Waters/Callisto short report on April 27. The April 30 cluster is three trading days after the report and the day after Q1 earnings. The CEO’s two subsequent purchases (May 4, May 7) extended the position at higher prices — the same averaging-up pattern the academic literature flags as a stronger conviction signal than single-shot purchases.

My fill at $12.97 is approximately $0.35 below the CEO’s average basis of $13.32 and below every director’s basis except Ramanathan and Bigley. The buyers are slightly underwater at the entry price; my entry is at a small discount to the cluster.

What the business does

Sportradar is a Swiss-headquartered, NASDAQ-listed business that provides sports data, integrity monitoring, and betting technology services to two sets of customers:

• Sports leagues and federations — official data rights deals (NBA, NHL, MLB, ATP, ICC, FIFA-related federations). Sportradar buys exclusive rights to live data from sporting events and resells that data with low-latency feeds.
• Sportsbooks and gambling operators — Sportradar’s Betting Technology segment sells live odds feeds, risk-management tools, fraud detection, AV streaming, and managed-trading services. This segment is the larger revenue contributor and the higher-growth one.

The economic model is recurring contracts with both sides — leagues pay for integrity services and audience-engagement products, sportsbooks pay subscription and per-feed fees for the data and risk tools. The Betting Technology segment grew 15% in Q1 against an industry that grew mid-single-digits; the company’s competitive position with leagues and the technical complexity of low-latency feed delivery have produced durable share gains.

The Muddy Waters/Callisto short thesis is structurally about the second customer class: the report alleges that some portion of Sportradar’s sportsbook revenue comes from operators that are licensed in jurisdictions Muddy Waters considers grey-market or illegal under US, UK, or EU regulatory frameworks. Sportradar disclosed in its 2026 20-F that it monitors operator licensing and has terminated relationships with operators in jurisdictions where new restrictions are announced. The short thesis depends on how aggressive a future regulatory definition of “grey market” becomes and on whether material revenue restatements would be required.

The argument for

A founder-CEO buying $10M of his own stock over nine days in response to a short report is the strongest conviction signal in any name in the book. Carsten Koerl founded Sportradar in 2001, took it public in 2021, and as of these purchases owns 2,776,073 Class A Ordinary Shares directly. His incremental $10M outlay is large in absolute terms and represents a significant new commitment relative to his existing direct stake. He is the person with the deepest knowledge of operator-by-operator revenue mix; if the short thesis were correct, he would be the last person to add at these levels. He added at successively higher prices.

The Q1 fundamentals do not look like a company facing structural revenue risk. Revenue accelerated to +11%, the Betting Technology segment grew +15% with margin expansion, and management reaffirmed full-year guide with the buyback authorization expansion. The €6.3M net loss is FX and accounting noise; cash adjusted EBITDA was up. The company has $542M of total liquidity and no near-term refinancing needs. The buyback expansion to $250M of enhanced open-market activity is a corporate version of the CEO’s personal buying — capital allocation pointed at the depressed share price.

The short report itself is the kind of single-actor public allegation that has historically been correct on some names (Muddy Waters has a real track record on China-listed accounting frauds) and incorrect on many others. Sportradar is audited by EY, listed on NASDAQ, has detailed segment disclosures, and the operator-licensing risk has been disclosed to investors since the 2021 IPO. The new claim is about scale and characterization rather than undisclosed activity. The market reaction (52-week high $32, current $13) suggests the report has already been mostly priced; the question is whether the short pressure persists or whether the company’s response and the buyback close some of the gap.

The director cluster — seven separate filings on the same day in small amounts — is the weakest part of the cluster on academic-edge grounds, but the strongest part on board-confidence optics. Boards do not coordinate seven simultaneous open-market buys without alignment on the disclosure framework. If material short-thesis allegations were credible to the board, the directors with audit-committee insight would not be filing.

The strongest case against

A short report from Muddy Waters that alleges material revenue from illegal operators is, by definition, the kind of risk that cannot be fully diligenced from public filings. If even 10% of Betting Technology revenue is at risk of regulatory clawback or operator de-licensing, the EBITDA guide is wrong by a wide margin and the buyback is destroying capital at the wrong price. The CEO buying does not eliminate that risk; it bets the CEO’s own capital against it, but founders have been wrong about their own businesses before, particularly regarding regulatory characterization questions where the legal definition is moving.

The seven-director cluster looks coordinated. Coordinated director purchases following a short attack can be authentic confidence or can be a defensive optical gesture. Distinguishing the two is impossible from the outside. The strategy’s normal filter — discount director buys, weight officer buys — applies; what is left is one officer ($10M) and the question of whether one founder-CEO conviction is enough to size against a public-allegation overhang.

The stock is at $13 against a 52-week high of $32, a roughly 60% drawdown. The underlying business has not deteriorated 60%; the multiple has compressed because of the short overhang. The stock cannot fully rerate while the overhang persists, and the overhang has no defined resolution date. The position can be right on the long-term thesis and dead money or worse for two to four quarters while the regulatory and legal questions are litigated.

The beta is 1.985 — the highest of any name in the book by a significant margin. A market sell-off will compound the company-specific overhang. The 52-week range from $11.66 to $32.22 implies high realized volatility independent of the short-report news.

The €6.3M Q1 net loss is partly FX, but the gap between adjusted EBITDA (€66M) and reported net income is not small. The company’s accounting has been clean to public scrutiny so far, but a short attack focused on revenue characterization could plausibly extend into adjusted-metric scrutiny in subsequent quarters.

The position is a bet on a single thing: the founder-CEO’s $10M conviction is correct and the Muddy Waters/Callisto thesis is wrong or already priced. That is a binary-feeling trade in a name where the academic-edge cluster filter is partially satisfied (CEO yes, broader officer cluster no) and the volatility is high.

Where I am on it

1.95% of book — undersized relative to the size of the cluster ($10M CEO purchase would normally argue for upper-range sizing). The downsize reflects three concerns: the short-report overhang has no defined resolution path, the director cluster looks coordinated and is therefore weaker than the CEO’s standalone signal, and the beta is roughly 2× the book average. Sized at the bottom of the standard band so that a stop-out is digestible.

Stop at $10.38, -20% from $12.97 fill, GTC, expires 2026-08-06. The stop sits at the low end of the 52-week range ($11.66 low, $32.22 high). A break below $10 would mean the post-short-report low was not the bottom and the stock has entered a new lower range, at which point the cluster signal has materially failed.

Compared to other positions in the book: this is the highest-beta name, the largest single-officer dollar conviction, and the most controversial signal. It is not directly comparable to any other position. PATK and BMI are cyclical-supplier mid-caps; GEHC and LW are large-cap defensives with transient cost issues; CHTR is a consumer-distribution recovery; OPCH is healthcare distribution. SRAD is the only name where the bull case requires a public-allegation thesis to be wrong.

What would change my mind

• A 20-F restatement, audit committee investigation announcement, or auditor change in the next 90 days. Any one of these would suggest the Muddy Waters thesis has internal validation; the position would be closed at market regardless of the stop level.
• A 424B5 takedown or any new equity issuance from Sportradar in the next 90 days. The current dilution-filings record is clean. An equity raise during the buyback program would be capital-allocation chaos.
• Insider sales by Koerl in the next 60 days. The CEO buying $10M and then selling any portion would invalidate the lead signal completely.
• Q2 earnings (late July) printing a downward revision to Betting Technology segment growth or the full-year guide. The bull case requires the operating trajectory to remain consistent with the reaffirmed guide.
• An expanded short report with new specific allegations supported by documented evidence (operator names, contract terms, regulator correspondence). The current short report is contestable; a second report with documentary support would change the risk profile.
• A break below $10.38 on volume. The stop will trigger; a clean break of the 52-week low without a bounce would say the short overhang dominates the cluster signal.

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