SAN FRANCISCO — Peter Thiel, the billionaire co-founder of PayPal and Palantir Technologies and a prominent venture capitalist through Founders Fund, has built one of the most influential investment portfolios in tech history. As of March 2026, his holdings reflect a mix of early-stage bets that exploded in value and strategic public market positions, with Palantir Technologies standing out as his largest single investment by current market value.

US libertarian billionaire Peter Thiel is one of the investors in the Games
AFP

Recent SEC filings and portfolio disclosures show Thiel's personal stakes, often tied to his roles as co-founder or early backer, dominating his wealth. His net worth hovers around $27-29 billion according to Forbes and Bloomberg estimates in early 2026, fueled by concentrated positions in high-growth companies. While Founders Fund — which Thiel co-founded — manages billions across funds and has raised a new $6 billion growth vehicle in March 2026 for follow-on investments, Thiel's direct exposure focuses on a handful of massive winners.

Here are the top 5 companies where Peter Thiel has invested the most, ranked by the approximate current value of his known stakes as of March 2026, drawing from SEC Form 4 filings, 13D/13G reports, and market data.

  1. Palantir Technologies Inc. (PLTR) Thiel's largest holding by far is Palantir, the big data analytics firm he co-founded in 2003. As of a March 4, 2026, filing, Thiel owned 68,871,556 shares valued at approximately $10.378 billion (based on a share price around $150.68). This represents about 69% of his reported public portfolio value in recent disclosures and roughly 8-10% of Palantir's outstanding shares. Palantir went public in 2020 via direct listing at a $20 billion valuation; its market cap has since surged past $100 billion in peaks, driven by AI and government contracts. Thiel has sold portions over time — including millions of shares in recent years — but remains a major shareholder and former chairman. The stake stems from his founding role and ongoing commitment to defense-tech and data platforms.
  2. Airbnb Inc. (ABNB) Thiel's second-largest reported public holding is Airbnb, where he was an early investor through Founders Fund. A 2020 filing showed him with 26,556,110 shares valued at $3.413 billion at the time (around $128.52 per share). While exact current figures may vary due to sales or adjustments, the stake remains significant in his portfolio snapshots, often cited in the billions range historically. Airbnb's 2020 IPO valued it at $47 billion initially, soaring higher post-pandemic. Thiel's backing came in the company's early growth phase, aligning with his preference for platforms disrupting traditional industries.
  3. Meta Platforms Inc. (META, formerly Facebook) Thiel's most legendary early bet was his $500,000 investment for a 10.2% stake in Facebook in 2004 — the first outside capital the company received. That modest check returned over $1 billion upon exits and sales, with Thiel serving on the board for years. While he has sold most of his position (including large blocks post-IPO), residual holdings persist; older filings showed smaller stakes worth millions. The investment's outsized returns — turning $500,000 into billions in aggregate gains — cemented Thiel's reputation. Meta's current market cap exceeds $1 trillion, underscoring the long-term impact.
  4. Tesla Inc. (TSLA) Through his hedge fund Thiel Macro (or related vehicles), Thiel held significant Tesla shares in recent quarters, though positions fluctuated dramatically. In Q3 2025 filings, Tesla remained a top holding despite a 76% reduction, and it featured prominently in AI-related portfolios. By early 2026 reports, Thiel Macro had sold out of Tesla (along with Microsoft and Apple) in Q4 2025, emptying public stock holdings. Earlier stakes placed Tesla in the high hundreds of millions to low billions at peaks, reflecting bets on electric vehicles and autonomy. The sales in 2025-2026 signaled a pivot, possibly toward private ventures.
  5. Microsoft Corp. (MSFT) / Apple Inc. (AAPL) In late 2025, Thiel initiated large positions in Microsoft and Apple via his hedge fund, with Microsoft briefly accounting for 34% of holdings after buying 49,000 shares and Apple a new stake of over 79,000 shares. These AI-focused bets on cloud (Azure) and consumer tech briefly ranked high in value terms. However, by February 2026, reports indicated Thiel Macro sold out entirely from these and other public stocks, suggesting redeployment into private opportunities or other assets. Earlier values placed these in the hundreds of millions during peak exposure.

Thiel's strategy emphasizes asymmetric bets: small early investments in transformative companies yielding massive multiples. His $500,000 Facebook stake became legendary, while co-founding Palantir delivered ongoing billions. Founders Fund's portfolio includes SpaceX, Stripe, Anduril, OpenAI, and others, but Thiel's personal largest exposures tie to public holdings like Palantir.

Recent moves show tactical shifts — exiting Nvidia, reducing Tesla, and pivoting from public AI plays — amid Founders Fund's $6 billion growth fund close in March 2026 for late-stage follow-ons in winners like Stripe and Ramp. Thiel's contrarian style, avoiding crowded trades, continues defining his approach.

As tech evolves with AI and defense, Thiel's top investments underscore his focus on data, platforms, and innovation — with Palantir as the crown jewel in 2026.