Current position

Christopher Bloomstran’s Microsoft (MSFT) position

Reported position history, portfolio importance and verified filing changes from public SEC disclosures.

Semper Augustus Investments Group LLCVerified through Q2 2026
Relationship snapshot

At a glance

The full verified relationship, including prior ownership episodes and exits where supported.

First reportedQ4 2007Earliest verified positive filing snapshot
Latest statusCurrent positionBased on the latest supported relationship state
Peak shares412.52KHighest verified quarter-end share count
Quarters reported34Verified quarters with shares above zero
What happened?

Semper Augustus Investments Group LLC first reported Microsoft in Q4 2007. After an earlier exit, the position later appeared again in a verified filing. The reported position was increased and reduced across later filings. Semper Augustus Investments Group LLC currently reports 641 shares. The latest verified filing showed: New position.

Verified SEC history

Position over time

See the same verified relationship through reported shares, portfolio weight or reported value.

Metric

Gaps indicate periods that cannot be safely connected or where a verified corporate action changes the raw share scale. Stock price, when available, is market context and not a transaction price.

Key filing events

What changed

Latest filing plus the most meaningful reported changes. Unchanged quarters are collapsed by default.

Q2 2026
New position+641 shares · 641 shares reported
Filing context

Quarter-end price $373.02 · Estimated holding basis $373.02

Q2 2016
Sold the entire position−67.21K shares · No shares reported at quarter-end
Q1 2016
Sold 1.3% of the position−917 shares · 67.21K shares remained
Filing context

Quarter-end price $55.23 · Estimated holding basis $25.83

Q4 2015
Sold 15.3% of the position−12.28K shares · 68.13K shares remained
Filing context

Quarter-end price $55.49 · Estimated holding basis $25.83

Q3 2015
Sold 6.4% of the position−5.54K shares · 80.40K shares remained
Filing context

Quarter-end price $44.26 · Estimated holding basis $25.83

Q2 2015
Sold 0.08% of the position−68 shares · 85.95K shares remained
Filing context

Quarter-end price $44.16 · Estimated holding basis $25.83

6 unchanged quarters are collapsed by default.

Portfolio importance

How important is Microsoft in Semper Augustus Investments Group LLC’s reported portfolio?

Relative importance is measured only within the verified primary non-option reported portfolio for each quarter.

Current portfolio weight0.0%Q2 2026
Current rank#45of 50 reported positions
Peak portfolio weight9.2%Q2 2009
Best historical rank#3Q1 2009
At peak importanceQ2 2009
MSFT
9.2%
Largest holding
11.1%
Cross-investor discovery

Who else owns Microsoft?

Also reported by 8 other tracked investors in their latest verified filings.

Bill AckmanPershing Square Capital Management
MSFT11.9% of reported portfolio
Terry SmithFundsmith LLP
MSFT4.4% of reported portfolio
Chase ColemanTiger Global Management LLC
MSFT3.5% of reported portfolio
Explore Microsoft across all tracked investors →
SEC evidence & methodology

SEC filing evidence

Market context and filing-derived values are kept separate from actual transaction prices, which 13F filings do not disclose.

Latest verified stock price$493.782026-09-18

Market context only; not an investor transaction price.

Latest filing quarter-end price$373.02Q2 2026

Derived from validated reported value and shares where supported.

Estimated holding basis$373.02Historical reference — not actual purchase price

Calculated from supported filing history.

Latest verified investor filingQ2 2026 · filed 2026-08-14
Open SEC filing ↗

View Microsoft stock page →

This tracker follows Semper Augustus Investments Group LLC’s Form 13F disclosures, not Christopher Bloomstran’s personal brokerage account. Form 13F reports quarter-end positions later and does not reveal exact trade dates or execution prices.