Live research pack

Hedge Fund Filing Pack

Quarterly 13F filings show what institutional managers held at quarter end and can arrive weeks later. SignalPack makes that lag explicit, compares manager changes, and keeps the sources and investing-lens scores attached.

Latest available quarter 2026-03-31Filings received through 2026-05-156 source filings3 available managersExecution disabled

Research leadsAMZN selected · 5 positionsAll positions

GOOGL
ALPHABET INC-CL A
Added shares
Berkshire, Pershing Square, Duquesne
Quality 5/6 known
Candidate
AMZN
AMAZON.COM INC
Reduced shares
Berkshire, Pershing Square, Duquesne
Quality 4/5 known · 1 missing
Review
DAL
DELTA AIR LINES INC
Added shares
Berkshire, Duquesne
Quality 3/4 known · 2 missing
Candidate
QSR
RESTAURANT BRANDS INTERN
Reduced shares
Pershing Square, Duquesne
Quality 3/6 known
Review
GOOG
ALPHABET INC-CL C
Reduced shares
Berkshire, Pershing Square
Quality 4/6 known
Review

Selected research lead

AMZN

AMAZON.COM INC

Reduced shares

This combined view is classified as reduced shares across Berkshire, Pershing Square, Duquesne. Individual manager moves can differ. The position represents 0.8% of reported portfolio in the selected-manager view. 6 source filings are attached for review.

Investing lenses

Value1/5 known · 2 missing · fail

Long-term EPS growth clears the Graham check

Quality4/5 known · 1 missing · pass

ROIC supports a quality-business thesis

Growth1/2 known · 3 missing · pending evidence

Needs source-backed innovation-platform mapping, platform score, network effect or convergence score before this lens can conclude.

Source filings

Berkshire · 2026-03-31 Berkshire · 2025-12-31 Pershing Square · 2026-03-31 Pershing Square · 2025-12-31 Duquesne · 2026-03-31 Duquesne · 2025-12-31

Point-in-time evidence

Why AMZN scored this way

Holdings reflect Mar 31, 2026; supporting evidence is limited to information available by May 15, 2026. Filing-derived prices are delayed proxies, not market quotes.

Cross-manager checked

Manager behavior

26.03/76

Manager-behavior conviction

Managers disagree

69.21th percentile average move magnitude · 54.38th percentile average position strength

13f-conviction-v1 keeps filing behavior separate from company fundamentals.

Berkshire

Exited position · 0% reported weight

Exited

Position exited-100% shares50th percentile move2-quarter negative streak

Pershing Square

Added shares · 17.39% reported weight

Building

Position 2 of 11+19.19% shares62.5th percentile move2-quarter positive streak

Duquesne

Reduced shares · 0.28% reported weight

Trimming

Position 53 of 65-93.79% shares95.12th percentile move1-quarter negative streak

Business quality

Point-in-time operating-company metrics derived from official SEC Company Facts.

Annual revenue: $716.9B; SEC Company Facts · Available; Derived with sec-company-facts-derived-v2.
5-year revenue CAGR: 13.18%; SEC Company Facts · Available; Derived with sec-company-facts-derived-v2.
Operating margin: 11.16%; SEC Company Facts · Available; Derived with sec-company-facts-derived-v2.
Free-cash-flow margin: 7.7%; SEC Company Facts · Available; Derived with sec-company-facts-derived-v2.
Return on invested capital: 16.35%; SEC Company Facts · Available; Derived with sec-company-facts-derived-v2.
Net long-term debt / equity: 0.05×; SEC Company Facts · Available; Derived with sec-company-facts-derived-v2.

Delayed valuation

Quarter-end 13F value/share evidence combined with lagged SEC per-share fundamentals.

Implied quarter-end price: $208.27; 13F-derived · Available; Delayed quarter-end price proxy derived from 2 13F value/share observation(s).
Filing-precision range: $208.27; 13F-derived · Available; Bounds reflect the reported market-value precision across 2 observation(s).
Delayed P/E: 29.05×; 13F-derived · Available; Delayed 13F quarter-end price proxy divided by latest point-in-time annual diluted EPS.
Delayed P/B: 5.49×; 13F-derived · Available; Delayed 13F quarter-end price proxy divided by latest point-in-time annual book value per diluted share.
Graham value proxy: $78.26; 13F-derived · Available; Square root of 22.5 times point-in-time annual diluted EPS and book value per diluted share.
Margin of safety: -166.12%; 13F-derived · Available; Graham-number proxy less delayed 13F price, divided by the Graham-number proxy.

Availability and quality

Cross-manager checked

12/12 displayed metrics are available.

Identity, asset structure, report date, filing units, sanity range, and manager agreement gates passed.

Lineage

6 SEC filing record(s) support the selected manager change set.

18 displayed or supporting fields trace to immutable SEC Company Facts data; unsupported qualitative and market claims are intentionally excluded from this panel.

2 current-position 13F observation(s) support the delayed Mar 31, 2026 price proxy, available after filings through May 15, 2026.

Daily adjusted prices, returns, volatility, liquidity, and benchmark comparisons arrive in Checkpoint 3; none are inferred from this delayed filing proxy.