STX vs WDC vs SNDK
161 measures in 16 categories, one definition each, computed from filings and market data.
STX84.7
Seagate Technology Holdings plc
Technology · Computer Hardware
$639.01 −7.50%$145.3B mkt cap
Score DNA
WDC69.9
Western Digital Corporation
Technology · Computer Hardware
$332.00 −6.86%$124.3B mkt cap
Score DNA
SNDK86.7
Sandisk Corporation
Technology · Computer Hardware
$1,299.30 −6.85%$187.8B mkt cap
Score DNA
Price, rebased to 100 three years ago
STX WDC SNDK · weekly adjusted closesSmart money 8Valuation 16Profitability (TTM) 12Returns on capital 11Growth 17Margin history & stability 7Liquidity (latest quarter) 7Leverage & solvency (latest quarter) 13Efficiency 11Cash flow & earnings quality 7Dividends & buybacks 9Scores & forensic checks 15Per share 7Size (TTM) 8Price performance 9Technicals 4
● marks the highest or lowest value where that direction is plainly stronger (margins, returns, coverage, leverage); multiples and yields are left unmarked. Bars show each stock's percentile within its own industry. n/a: the measure does not apply to lenders and insurers.
Smart money
8 measures| Measure | STX | WDC | SNDK |
|---|---|---|---|
| Insider open-market buys, 180d | 0 | 0 | 0 |
| Insider $ bought, 180d | — | — | — |
| Congress purchases, 180d | 1 | 4 | 5 |
| Last Congress purchase | 2026-03-27 | 2026-09-25 | 2026-09-04 |
| 13F net change in holders | +505 | — | — |
| ETFs adding shares, 30d | 1,701 | 1,981 | 1,560 |
| ETFs trimming, 30d | 1,272 | 1,473 | 1,377 |
| Net ETF funds, 30d | +429 | +508 | +183 |
Valuation
16 measures| Measure | STX | WDC | SNDK |
|---|---|---|---|
| P/E (TTM) | 45.6x
83rd
|
13.2x
17th
|
16.4x
33rd
|
| PEG (P/E ÷ 3-yr EPS CAGR) | — | — | — |
| Price / sales | 11.9x
70th
|
9.6x
60th
|
9.3x
55th
|
| Price / book | 67.1x
100th
|
14.0x
76th
|
11.9x
71st
|
| Price / tangible book | 198.5x
100th
|
45.4x
87th
|
25.2x
73rd
|
| Price / free cash flow | 43.7x
91st
|
38.6x
73rd
|
16.3x
36th
|
| Price / operating cash flow | 39.5x
82nd
|
34.2x
73rd
|
16.1x
45th
|
| Enterprise value | $147.5B
85th
|
$123.7B
80th
|
$183.4B
90th
|
| EV / sales | 12.1x
70th
|
9.6x
65th
|
9.1x
55th
|
| EV / EBITDA | 34.7x
85th
|
14.2x
54th
|
13.8x
46th
|
| EV / EBIT | 37.1x
85th
|
14.9x
46th
|
14.0x
31st
|
| EV / free cash flow | 44.3x
91st
|
38.4x
73rd
|
16.0x
36th
|
| Earnings yield | 2.2%
50th
|
7.6%
90th
|
6.1%
80th
|
| FCF yield | 2.3%
50th
|
2.6%
60th
|
6.1%
80th
|
| Operating cash flow yield | 2.5%
55th
|
2.9%
60th
|
6.2%
75th
|
| Graham number (per share) | $54.41
80th
|
$115.30
90th
|
$410.48
100th
|
Profitability (TTM)
12 measures| Measure | STX | WDC | SNDK |
|---|---|---|---|
| Gross margin | 45.6%
65th
|
48.9%
70th
|
71.5%
100th
|
| EBITDA margin | 34.9%
84th
|
67.3%
100th
|
65.4%
95th
|
| Operating margin | 33.6%
85th
|
34.9%
90th
|
61.3%
100th
|
| EBIT margin | 32.6%
84th
|
64.4%
95th
|
64.7%
100th
|
| Net margin | 26.1%
85th
|
72.9%
100th
|
56.5%
95th
|
| NOPAT margin | 29.0%
85th
|
33.2%
90th
|
53.9%
100th
|
| FCF margin | 27.3%
90th
|
24.9%
85th
|
56.8%
100th
|
| Operating cash flow margin | 30.1%
90th
|
28.2%
85th
|
57.6%
100th
|
| R&D / revenue | 6.2%
20th
|
9.0%
45th
|
6.6%
25th
|
| SG&A / revenue | 4.7%
15th
|
4.3%
10th
|
3.3%
5th
|
| Stock comp / revenue | 1.7%
45th
|
1.6%
35th
|
1.1%
25th
|
| Effective tax rate | 13.7%
35th
|
4.9%
10th
|
12.2%
20th
|
Returns on capital
11 measures| Measure | STX | WDC | SNDK |
|---|---|---|---|
| ROE (on average equity) | 371.5%
100th
|
133.0%
94th
|
91.6%
82nd
|
| ROA | 35.4%
90th
|
67.6%
100th
|
64.4%
95th
|
| ROIC | 81.8%
75th
|
51.4%
65th
|
95.9%
85th
|
| ROCE | 59.4%
90th
|
86.5%
100th
|
77.4%
95th
|
| Return on tangible assets | 44.2%
90th
|
59.7%
95th
|
73.8%
100th
|
| Cash ROIC (OCF / invested capital) | 85.0%
74th
|
43.6%
53rd
|
102.7%
79th
|
| Gross profitability (GP / assets) | 55.7%
80th
|
45.5%
65th
|
64.3%
95th
|
| ROIC, 3-yr average | 45.2%
60th
|
22.4%
40th
|
— |
| ROIC, 5-yr average | — | 13.4%
79th
|
— |
| ROE, 5-yr average | — | 26.4%
79th
|
— |
| Incremental ROIC | 205.0%
95th
|
-527.7%
10th
|
224.3%
100th
|
Growth
17 measures| Measure | STX | WDC | SNDK |
|---|---|---|---|
| Revenue growth (TTM YoY) | 34.1%
60th
|
-2.7%
20th
|
965.1%
95th
|
| Revenue growth (QoQ) | 16.6%
75th
|
12.3%
55th
|
50.7%
100th
|
| Revenue CAGR, 3 yr | 18.2%
68th
|
1.6%
37th
|
— |
| Revenue CAGR, 5 yr | 2.7%
47th
|
-5.3%
12th
|
— |
| Gross profit CAGR, 3 yr | 57.7%
88th
|
49.5%
81st
|
— |
| Operating income CAGR, 3 yr | — | — | — |
| Net income growth (TTM YoY) | 116.7%
60th
|
404.5%
90th
|
— |
| Net income CAGR, 3 yr | — | — | — |
| EPS growth (TTM YoY) | 106.3%
60th
|
385.7%
90th
|
— |
| EPS CAGR, 3 yr | — | — | — |
| EPS CAGR, 5 yr | 19.8%
50th
|
57.3%
90th
|
— |
| FCF growth (TTM YoY) | 306.6%
100th
|
151.8%
90th
|
— |
| FCF CAGR, 3 yr | 74.5%
88th
|
— | — |
| Operating cash flow CAGR, 3 yr | 57.4%
88th
|
— | — |
| Book value CAGR, 3 yr | — | -13.9%
7th
|
— |
| Dividend CAGR, 3 yr | -1.5%
0th
|
52.8%
100th
|
— |
| Sustainable growth rate | 297.5%
100th
|
130.4%
90th
|
91.6%
80th
|
Margin history & stability
7 measures| Measure | STX | WDC | SNDK |
|---|---|---|---|
| Gross margin, 3-yr average | 34.7%
44th
|
36.2%
50th
|
— |
| Operating margin, 3-yr average | 20.4%
89th
|
17.8%
83rd
|
— |
| Net margin, 3-yr average | 15.8%
83rd
|
26.6%
94th
|
— |
| FCF margin, 3-yr average | 15.5%
78th
|
9.2%
72nd
|
— |
| Revenue stability (0-1) | 0.03
11th
|
0.42
37th
|
— |
| Earnings stability (0-1) | 0.17
26th
|
0.37
47th
|
— |
| Margin stability (0-1) | 0.65
26th
|
0.56
21st
|
— |
Liquidity (latest quarter)
7 measures| Measure | STX | WDC | SNDK |
|---|---|---|---|
| Cash & short-term investments | $1.7B
55th
|
$1.6B
50th
|
$4.8B
80th
|
| Net cash (− = net debt) | −$2.2B
15th
|
$527.0M
60th
|
$4.4B
95th
|
| Working capital | $1.9B
75th
|
$1.4B
65th
|
$7.2B
90th
|
| Current ratio | 1.59
35th
|
1.33
25th
|
2.29
45th
|
| Quick ratio | 1.11
30th
|
0.97
20th
|
1.81
45th
|
| Cash ratio (cash + ST investments / current liabilities) | 0.52
30th
|
0.37
20th
|
0.85
45th
|
| Defensive interval (days) | 807 days
60th
|
730 days
50th
|
1,684 days
85th
|
Leverage & solvency (latest quarter)
13 measures| Measure | STX | WDC | SNDK |
|---|---|---|---|
| Total debt | $3.9B
80th
|
$1.1B
70th
|
$393.0M
65th
|
| Debt / equity | 1.78
100th
|
0.12
59th
|
0.02
35th
|
| Net debt / equity | 0.99
100th
|
−0.06
82nd
|
−0.28
59th
|
| Debt / assets | 38.7%
100th
|
7.6%
60th
|
1.7%
30th
|
| Debt / capital | 64.0%
100th
|
10.6%
59th
|
2.4%
35th
|
| Debt / EBITDA | 0.91
54th
|
0.12
38th
|
0.03
8th
|
| Net debt / EBITDA | 0.51
77th
|
−0.06
62nd
|
−0.33
54th
|
| Interest coverage (EBIT / interest) | 14.0x
50th
|
53.7x
79th
|
154.1x
93rd
|
| Cash interest coverage | 12.9x
50th
|
23.5x
71st
|
137.3x
86th
|
| Debt payback (years of OCF) | 1.1 yrs
55th
|
0.3 yrs
36th
|
0.0 yrs
9th
|
| Liabilities / assets | 78.3%
80th
|
36.1%
30th
|
30.1%
25th
|
| IS credit model rating | A+ | AA+ | AA+ |
| Implied credit spread (bps) | 125
30th
|
65
5th
|
65
5th
|
Efficiency
11 measures| Measure | STX | WDC | SNDK |
|---|---|---|---|
| Asset turnover | 1.36
80th
|
0.93
55th
|
1.14
65th
|
| Fixed asset turnover | 6.00
45th
|
5.22
40th
|
30.04
90th
|
| Inventory turnover | 4.4
56th
|
4.7
61st
|
2.4
28th
|
| Receivables turnover | 9.8
100th
|
7.4
60th
|
7.0
45th
|
| Days sales outstanding | 37 days
0th
|
50 days
40th
|
52 days
55th
|
| Days inventory outstanding | 83 days
44th
|
77 days
39th
|
151 days
72nd
|
| Days payables outstanding | 92 days
70th
|
84 days
60th
|
28 days
5th
|
| Cash conversion cycle (days) | 28 days
35th
|
43 days
45th
|
175 days
80th
|
| Capex / revenue | 2.9%
40th
|
3.2%
50th
|
0.9%
10th
|
| Capex / depreciation | 1.26
65th
|
1.11
50th
|
1.19
60th
|
| Operating expense ratio | 9.8%
15th
|
12.4%
20th
|
6.1%
5th
|
Cash flow & earnings quality
7 measures| Measure | STX | WDC | SNDK |
|---|---|---|---|
| Operating cash flow / net income | 1.15
33rd
|
0.39
8th
|
1.02
17th
|
| FCF / net income | 1.04
42nd
|
0.34
8th
|
1.01
33rd
|
| FCF / operating cash flow | 90.5%
73rd
|
88.5%
64th
|
98.5%
100th
|
| Capex / operating cash flow | 9.5%
27th
|
11.5%
36th
|
1.5%
0th
|
| Accruals ratio | -5.4%
50th
|
41.5%
100th
|
-1.3%
75th
|
| Sloan accruals ratio | 7.3%
65th
|
4.2%
60th
|
19.1%
80th
|
| Earnings quality score (0-1) | 0.75
17th
|
0.25
0th
|
1.00
67th
|
Scores & forensic checks
15 measures| Measure | STX | WDC | SNDK |
|---|---|---|---|
| IS score | 85
95th
|
70
70th
|
87
100th
|
| IS profitability | 96
85th
|
96
90th
|
100
100th
|
| IS growth | 100
100th
|
69
55th
|
86
85th
|
| IS value | 32
30th
|
48
60th
|
42
45th
|
| IS momentum | 97
85th
|
56
35th
|
93
75th
|
| IS risk (safety) | 100
45th
|
100
45th
|
100
45th
|
| IS quality | 81
80th
|
74
60th
|
91
90th
|
| IS balance sheet | 63
35th
|
81
50th
|
93
90th
|
| IS earnings quality | 74
90th
|
20
25th
|
68
65th
|
| IS cash flow | 85
85th
|
74
80th
|
93
95th
|
| Piotroski F-score (0-9) | 8
75th
|
6
50th
|
7
60th
|
| Altman Z-score | 16.4
70th
|
28.4
90th
|
27.8
80th
|
| Beneish M-score | −2.42
42nd
|
−0.28
84th
|
0.47
95th
|
| Ohlson O-score | −8.01
45th
|
−12.03
5th
|
−14.51
0th
|
| IS credit score | 77
65th
|
91
80th
|
91
80th
|
Size (TTM)
8 measures| Measure | STX | WDC | SNDK |
|---|---|---|---|
| Market cap | $145.3B
85th
|
$124.3B
80th
|
$187.8B
90th
|
| Revenue | $12.2B
70th
|
$12.9B
75th
|
$20.2B
80th
|
| EBITDA | $4.2B
75th
|
$8.7B
90th
|
$13.3B
95th
|
| Net income | $3.2B
80th
|
$9.4B
90th
|
$11.4B
100th
|
| Free cash flow | $3.3B
75th
|
$3.2B
70th
|
$11.5B
100th
|
| Total assets | $10.0B
60th
|
$13.9B
70th
|
$22.5B
75th
|
| Shareholders' equity | $2.2B
65th
|
$8.9B
80th
|
$15.7B
95th
|
| Employees | 30,000
80th
|
40,000
85th
|
11,100
70th
|
Price performance
9 measures| Measure | STX | WDC | SNDK |
|---|---|---|---|
| 1 day | −7.5% | −6.9% | −6.8% |
| 1 week | −18.4% | −16.4% | −17.9% |
| 1 month | −20.4% | −21.7% | −19.5% |
| 3 months | −20.4% | −31.9% | −6.6% |
| 6 months | +16.7% | −10.9% | +41.1% |
| Year to date | +122.2% | +76.9% | +372.1% |
| 1 year | +191.3% | +175.9% | +800.4% |
| 3 years, cumulative | +869.5% | +851.0% | — |
| 5 years, cumulative | +816.0% | +679.5% | — |
Technicals
4 measures| Measure | STX | WDC | SNDK |
|---|---|---|---|
| RSI 14 | 27.6 | 27.0 | 29.7 |
| From 52-week high | −44.1% | −58.5% | −44.8% |
| From 52-week low | +205.8% | +183.4% | +853.3% |
| Beta | 2.08 | 2.17 | 5.22 |
InsiderStreet reports findings from filings and market data. A comparison is not a recommendation to buy or sell either stock.Every figure is computed in code · data as of 2026-10-17