Berkshire requires a 25–50% discount to intrinsic value before buying.
Buffett Quality Checklist
✓ROE >15% consistently (≥7 of last 10 years)
✓Free cash flow positive (≥8 of last 10 years)
✓Conservative leverage — Debt/Equity below 1
✗Revenue growing at CAGR >5%
✗EPS growing at CAGR >5%
10-Year Financial History — SEC EDGAR 10-K Filings
Year▲
Revenue▲
Net Income▲
FCF▲
Owner Earnings▲
ROE▲
Net Margin▲
LT Debt▲
Cash▲
2016
$3.3B
$995.2M
—
—
28.1%
30.3%
—
$1.1B
2017
$3.7B
$1.0B
—
—
24.8%
27.7%
—
$1.6B
2018
$3.9B
$918.4M
$838.3M
$768.6M
22.4%
23.7%
—
$733.3M
2019
$3.4B
$853.6M
$969.0M
$770.1M
20.7%
25.3%
—
$851.3M
2020
$3.4B
$814.8M
$815.1M
$743.7M
19.6%
24.3%
$0
$566.7M
2021
$5.1B
$1.5B
$1.1B
$1.2B
28.3%
29.3%
$2.2B
$882.9M
2022
$5.5B
$1.3B
$935.2M
$1.2B
23.3%
23.2%
$1.7B
$566.0M
2023
$4.8B
$982.8M
$1.6B
$1.2B
16.2%
20.6%
$992.9M
$718.8M
2024
$4.2B
$596.0M
$1.7B
$703.8M
9.4%
14.3%
$994.3M
$1.4B
2025
$4.1B
$477.1M
$1.1B
$560.8M
8.3%
11.7%
$496.4M
$1.2B
Warren & Charlie
Buffett / Munger — quality, moat & valuation
SKYWORKS SOLUTIONS, INC. (SWKS) — Investment Memo
🐂 The Bull Case (Warren's voice)
We aren't buying a growth story here; we are buying a cash-generating machine that the world currently cannot function without.
The "Toll Bridge" Effect: Every single smartphone requires RF components to talk to a tower. Skyworks owns the critical infrastructure of the airwaves. As long as the world demands connectivity, they collect a "toll" on every handset shipped.
Deep Design-In Integration: The moat isn't a brand; it's engineering inertia. Once a Skyworks chip is baked into a device's motherboard, the cost and risk of switching to a competitor mid-cycle are prohibitively high. It is a sticky relationship, even if the pricing power is weak.
Superior Cash Conversion: The gap between Net Income and FCF is the silver lining. If the business is truly generating $1.1B to $1.7B in FCF while reporting lower earnings, the "real" yield is far higher than the GAAP numbers suggest.
Attractive Entry: This becomes a Berkshire-style play only if we treat it as a cigar butt—paying a price so low that the declining revenue is irrelevant because the current cash flow is simply too cheap to ignore.
🐻 The Bear Case (Charlie inverts)
"Show me where I'll die and I won't go there." This business is walking toward a cliff.
The Apple Dependency (The Single Point of Failure): Customer concentration is a cardinal sin. If the primary OEM decides to bring RF design in-house or shifts to a competitor, the revenue doesn't just "dip"—it evaporates.
The SoC Integration (Structural Obsolescence): The greatest threat isn't a competitor; it's integration. As processors (like Qualcomm's or Apple's) integrate more RF functions directly onto the main chip (System-on-Chip), the need for discrete Skyworks components vanishes. The product doesn't get cheaper; it becomes unnecessary.
The Revenue Death Spiral: You cannot "manage a retreat" into prosperity. A drop from $5.5B to $4.1B in three years is not a cyclical dip; it is a structural decline. When the top line shrinks and the moat erodes, you are holding a melting ice cube.
Most Likely Scenario: Permanent impairment via technological obsolescence over the next 5–7 years. The hardware is being "engineered out" of the device.
💰 Valuation & Margin of Safety
The DCF assumes 4% growth, which may be far too optimistic for a business in a "death spiral."
Intrinsic value estimate: $117.12 per share
25% margin of safety entry: $87.84(Conservative)
50% margin of safety entry: $58.56(Buffett's ideal)
Current Status: Depending on current market price, it is likely fairly valued to expensive. Given the eroding moat and revenue decline, the market is pricing in a stability that the 10-K does not support.
Verdict: PASS
The revenue decline is a structural warning sign that overrides the current FCF strength. We do not buy businesses that are being engineered out of existence, regardless of the discount. Price is irrelevant when the moat is a memory.
Research Notes· Money Model · Moat · Financials · Management
Data sourced from SEC EDGAR XBRL filings (10-K only). For educational purposes — not investment advice.