AAPL EPS resilience: net-income growth vs share-count shrinkage (TTM, last ~3 years)
Surprising short answer: AAPL’s EPS resilience over the past ~3 years is driven mostly by genuine net‑income growth, not only buyback accounting. Reported TTM EPS compounded at +11.88% per year while TTM net income compounded about +9.12% and average diluted shares fell roughly −2.48% annually, and a log‑decomposition attributes about 78% of the EPS gain to net‑income growth versus ~22% to share‑count shrinkage.
I built trailing‑12‑month series from 13 quarterly TTM points (point‑in‑time fiscal filings), reconstructed implied EPS as TTM net income divided by average shares, and decomposed log changes so the EPS move splits cleanly into profit versus buyback effects. The full statistics, charts, and robustness checks are below.
For AAPL over the past ~3 years, how much of its trailing per-share earnings resilience is genuine net-income growth versus pure share-count shrinkage from record buybacks — is the EPS line propped up by financial engineering? Thesis: net income has been roughly flat-to-down across the window while the share count kept falling several percent a year, so nearly all of AAPL's EPS support is buyback math rather than an actually growing profit pool.
How this was measured
Filtered AAPL_fundamentals to quarterly rows with fiscal_date_ending ≤ today−60 days to ensure point-in-time correctness. Constructed trailing-12-month (TTM) series: net income (sum of last 4 quarters), reported EPS (sum of quarterly eps_diluted), and average shares outstanding (mean of last 4 quarters). Implied TTM EPS was computed as TTM net income divided by the 4-quarter average shares to enable an exact log-change decomposition: log(EPS) = log(Net income) − log(Shares). Growth rates were annualized (CAGR) between the first and last TTM observations within the ~3-year window, and the EPS change was attributed to net-income change vs buyback-driven share-count change. A normalized index chart (start=100) compares trajectories.
The key numbers
Reading the numbers
Over the ~3-year window, reported TTM EPS grew at about 11.9% annualized while TTM net income grew about 9.12% annualized; shares outstanding shrank roughly 2.48% per year. The log decomposition attributes 22.31% of the EPS change to share-count shrinkage (buybacks).
The charts
The indexed lines all start at 100; by 2026-03-31 TTM EPS is 140.0581, TTM net income is 129.9552, and shares outstanding are 92.7519. What to look at is the gap at the end: EPS has risen about 40% while net income rose about 30% and shares fell about 7.25% (100 → 92.7519). That pattern shows EPS gains come from both sources, with net-income growth supplying the bulk of the rise and shrinking share count providing an added lift.
The log-based decomposition bars split the EPS change into roughly 77.69% from net income and 22.31% from buybacks (share-count shrinkage). The smaller but nontrivial 22.31% bar is the visual cue: buybacks materially help EPS but do not explain most of it. In short, buyback math props up EPS by about one-quarter of the change while about three-quarters is genuine net-income growth.
Start vs End (TTM) — last ~3 years; currency/shares in billions
| metric | start | end | pct_change |
|---|---|---|---|
| TTM EPS (reported) | 5.8857 | 8.2434 | 0.4006 |
| TTM EPS (implied NI/shares) | 5.8782 | 8.236 | 0.4011 |
| TTM Net income (USD B) | 94.32 | 122.58 | 0.2996 |
| Shares outstanding (B) | 16.0459 | 14.8828 | -0.0725 |
The takeaway
Short answer: not mainly — over the past ~3 years AAPL's EPS gains are driven mostly by real net‑income growth, with buybacks providing a meaningful but smaller boost. Annualized, reported TTM EPS compounded at +11.88% while TTM net income compounded at +9.12% and average diluted shares fell about -2.48% per year. A log-change decomposition attributes roughly 78% of the EPS increase to net‑income growth and about 22.31% to share‑count shrinkage (buybacks). This is reasonably conclusive for the ~3‑year window: we have 13 TTM points and the reported vs implied EPS constructions differ by only about 0.11% on average, so the math and timing are consistent. In dollar terms TTM net income rose from $94.32B to $122.58B over the window. Shares fell from 16.0459B to 14.8828B, which provided the ~22% extra lift — buybacks helped materially, but they are not the primary source of EPS resilience.
The fine print
- Decomposition uses a 4-quarter average shares measure, not the exact GAAP weighted‑average diluted share count; attribution can differ slightly.
- Reported TTM EPS is the sum of quarterly EPS while implied EPS = TTM net income ÷ 4‑quarter avg shares; their mean gap is small (~0.11%).
- Window is ~3 years (13 TTM points); a longer or different history could change the attribution balance.
- Fiscal dates were lagged 60 days to avoid forward bias; the latest quarter may be excluded if still within that lag.