The contrasting moves, drawn from 13F filings submitted to the US Securities and Exchange Commission and reported by The Block on May 16, appear to illustrate a split in how different types of institutional money are approaching digital assets. Long-horizon sovereign capital is accumulating Bitcoin on dips. Tactical investors, including university endowments, are rotating out of altcoin positions that underperformed.

---

Mubadala Keeps Buying

Mubadala held 14,721,917 shares of BlackRock's iShares Bitcoin Trust (IBIT) as of March 31, 2026, a 16% increase from the 12,702,323 shares it reported at year-end 2025. The position was valued at approximately $565.6 million as of March 31, 2026.

That figure is lower than the $630.6 million reported at the end of 2025's fourth quarter, but the decline reflects Bitcoin's price weakness in Q1 2026 rather than any reduction in share count. Bitcoin traded near $74,000 at its Q1 low before recovering to roughly $79,200 by mid-May.

Mubadala has not reduced its IBIT position in any quarter since it first disclosed the holding in Q4 2024.

A second Abu Dhabi entity, Al Warda Investments, an arm of the Abu Dhabi Investment Council (ADIC) that sits within the broader Mubadala umbrella, independently holds approximately 8.2 million IBIT shares worth around $408 million as of year-end 2025.

Together, the two funds account for more than $1.38 billion in a single ETF product, according to analysis by Serrari Group, which aggregated the positions across reporting periods.

An ADIC spokesperson has previously stated the rationale plainly, in comments reported by regional outlet coin-turk: "We view Bitcoin as a store of value similar to gold, and as the world continues to move toward a more digital future, we see Bitcoin playing an increasingly important role alongside gold."

IBIT itself has grown into the dominant vehicle for institutional Bitcoin exposure. The fund held approximately $66.9 billion in assets as of May 7, 2026, representing roughly 66% of the total US spot Bitcoin ETF market. Institutional investors now account for 38% of IBIT's total assets, up from 24% a year earlier.

---

Harvard's One-Quarter Experiment

Harvard Management Company's Q1 2026 filing tells a different story. In Q4 2025, the endowment made headlines when it entered BlackRock's iShares Ethereum Trust (ETHA) for the first time, buying 3,870,900 shares worth approximately $86.8 million. Press coverage at the time framed the move as a sign that Harvard was diversifying its crypto exposure beyond Bitcoin.

By March 31, 2026, the position was gone entirely.

Harvard also trimmed its IBIT stake by 21% in Q4 2025, bringing it down to 5.35 million shares valued at around $265.8 million from 6.81 million shares the quarter prior.

Whether it continued reducing that Bitcoin position through Q1 2026 is not yet confirmed by secondary sources; the ETHA liquidation is drawn directly from the 13F filing as reported by The Block.

Ethereum significantly underperformed Bitcoin in Q1 2026, which provides one likely explanation for the exit. The single-quarter holding period is consistent with a tactical rather than strategic allocation, though Harvard has not publicly stated its reasoning.

---

A Broader Institutional Shift

The Q1 2026 filing season shows sovereign and pension capital moving in one direction on Bitcoin while university endowments and some tactical investors stay cautious or reshuffle.

CalPERS, the largest US public pension fund, allocated roughly $500 million to Bitcoin in Q1 2026, representing approximately 1% of its total assets.

Goldman Sachs disclosed approximately $2.36 billion in total crypto ETF exposure across multiple products, according to its most recent 13F filing.

Q1 2026 saw $18.7 billion in global crypto ETP inflows, with $12.4 billion absorbed by Bitcoin products specifically. Total spot Bitcoin ETF assets crossed $101 billion by the end of April 2026.

---

What This Means Outside the United States

Abu Dhabi's accumulation matters across the Gulf and beyond. The city's Abu Dhabi Global Market (ADGM), together with its internal financial regulator the Financial Services Regulatory Authority (FSRA), gave Mubadala the legal infrastructure to build these positions.

BNY, the world's largest custody bank, announced an expansion of crypto custody services in Abu Dhabi earlier this month, covering Bitcoin, Ether, stablecoins, and tokenized assets, signaling that full institutional infrastructure is taking shape in the emirate.

For investors and developers in South Asia and Africa, the gap is more visible. India remains the world's top country for retail crypto adoption, according to the Chainalysis 2025 Global Crypto Adoption Index, but lacks a domestic Bitcoin ETF approved by its markets regulator, SEBI. Indian investors can access IBIT through the Liberalized Remittance Scheme, which permits up to $250,000 per individual per year in overseas investments, but institutional and high-net-worth access remains informal.

In South Africa, Altvest Capital is attempting to bridge a similar gap by rebranding as Africa Bitcoin Corp, positioning itself as the continent's first listed Bitcoin treasury company, and targeting a $210 million raise to build a Bitcoin treasury listed on the Johannesburg Stock Exchange, with planned stock exchange listings in Namibia, Botswana, and Kenya.

The Mubadala pattern of buying consistently through price weakness rather than chasing momentum has been described as a model by emerging market asset managers who cannot yet access IBIT at the institutional level through domestic markets.

---

13F filings cover positions held as of the last day of each quarter and are submitted to the SEC 45 days after the quarter closes. They reflect holdings at a point in time and do not capture intra-quarter trading activity.