William Blair Dumps $135 Million of MercadoLibre Amid the Stock's 20% Decline

William Blair reduced its MercadoLibre (MELI) position by 64,225 shares in Q4 per a Feb. 9, 2026 SEC filing—an estimated $134.90 million transaction using the quarter's mean closing price—leaving 165,579 shares valued at $333.52 million (0.93% of reportable 13F AUM and the fund's 12th-largest holding) and contributing to a quarter-end position value decline of $203.52 million. MercadoLibre, priced at $2,035.59 as of Feb. 6, 2026, reports TTM revenue of $26.19 billion and net income of $2.08 billion; the sale is characterized as part of a multi-quarter trimming by William Blair, with the author maintaining a constructive long-term view given strong fintech and buyer growth metrics and a stated valuation near 35x earnings.

Analysis

Market structure: William Blair’s $135m trim (64,225 shares) is portfolio rebalancing noise — the trade equals 0.38% of its 13F AUM and leaves MELI as a top-12 holding. Direct beneficiaries if sentiment stabilizes are MercadoLibre (MELI) and adjacently MercadoPago/credit growth (fintech lenders), while small local banks and cash-heavy retailers face competitive pressure as digital payments and credit penetration rise; Amazon (AMZN) and global logistics providers remain strategic competitors for share gains in Latin America.

Risk assessment: Short-term (days–weeks) this is headline-driven volatility; watch for 20–30% intraday moves around earnings or FX shocks. Tail risks include severe FX depreciation (>30% BRL/ARS moves), government caps on fintech interest/fees, or a credit-cycle NPL spike (>400 bps) that could halve valuation; long-term (3+ years) the secular fintech adoption thesis remains intact if revenue growth >20% YoY and credit portfolio growth remains >30%.

Trade implications: Prefer buy-the-dip exposure with active hedges: accumulate MELI on staged fills (see decisions) and use a long MELI / short EEM (MSCI EM) pair to isolate idiosyncratic upside versus EM macro risk. Options: use 6–12 month call LEAPs for asymmetric upside and cash‑secured puts to buy at targeted levels; cap overall risk to 2–3% of portfolio value.

Contrarian angles: Consensus overweights regulatory/FX doom; it underestimates MercadoPago’s high-margin fintech acceleration (65% fintech revenue growth, credit +83%) and sticky user LTV. Historical parallel: PayPal’s early fintech monetization was punished multiple times before rerating; if MELI sustains revenue growth >25% next two quarters, rerating to 25x EPS could imply 30–60% upside, making current weakness likely underdone.

Key Decisions for Investors

• Establish a staged long position in MELI totaling 2% of portfolio NAV over 90 days: 0.5% at market (~$2,035), 0.75% if MELI ≤ $1,700 (−16%), 0.75% if MELI ≤ $1,400 (−31%). Target hold = 36 months; take-profits at +30% and +60%; cut exposure to 1% if fintech YoY revenue growth <20% or NPLs rise >400 bps on next two quarterly reports.
• Deploy options to leverage: buy 12‑month LEAP calls at ~15%–25% OTM sized to 1% of NAV max capital, and simultaneously sell a 90‑day cash‑secured put at $1,700 (size 0.5% NAV) to acquire shares cheaper or collect premium. Close if implied vol rises >40% (avoid overpaying for protection) or share price breaks below $1,200.
• Implement a relative-value hedge: long MELI 1% NAV vs short iShares MSCI Emerging Markets ETF (EEM) 0.8% NAV for 6–12 months to hedge macro/FX risk while retaining idiosyncratic upside; rebalance if EEM outperforms MELI by >15% in 60 days.
• Hedge FX/regulatory tail risk: buy 6‑month BRL put options sized to hedge 50% of expected repatriated earnings exposure if position >1% NAV, and reduce MELI exposure to 50% if BRL depreciates >15% in 30 days or if a major LatAm market announces fintech interest/fee caps within 90 days.