Lam Research reported $2.66B of remaining performance obligations at 27 Sep 2026, down 4% from a year earlier and up 9% from the previous quarter. That is 0.1 years of trailing revenue already under contract. Book-to-bill last quarter: 1.03.
Net new backlog added in the latest quarter: $227M.
76% of the backlog is due within the next twelve months.
Customer prepayments (contract liabilities) cover 91.3% of the backlog.
Twelve-month book-to-bill: 1.00, i.e. 1.00 of new orders for every 1 of revenue recognised.
Backlog growth minus revenue growth: -37 points — revenue is catching up with orders.
By backlog size it ranks 160th among US filers the cockpit tracks.
Lam Research backlog history
Remaining performance obligations at each quarter end (bars) against trailing twelve-month revenue (line).
Amounts in USD. Source: SEC XBRL filings.
Quarter end
Backlog (RPO)
TTM revenue
Coverage
Customer prepayments
27 Sep 2026
$2.66B
$26.1B
0.1 yrs
$2.43B
28 Jun 2026
$2.43B
$23.2B
0.1 yrs
$2.43B
29 Mar 2026
$2.22B
$21.7B
0.1 yrs
$2.09B
28 Dec 2025
$2.25B
$20.6B
0.1 yrs
$2.16B
28 Sep 2025
$2.77B
$19.6B
0.1 yrs
$2.65B
29 Jun 2025
$2.68B
$18.4B
0.1 yrs
$2.68B
30 Mar 2025
$2.01B
n/a
n/a
$1.88B
29 Dec 2024
$2.03B
n/a
n/a
$1.93B
29 Sep 2024
$2.05B
n/a
n/a
$1.94B
30 Jun 2024
$1.55B
n/a
n/a
$1.55B
31 Mar 2024
$1.75B
$14.2B
0.1 yrs
$1.60B
24 Dec 2023
$1.93B
$14.3B
0.1 yrs
$1.79B
Questions
What is Lam Research's backlog?
Lam Research reported $2.66B of remaining performance obligations at 27 Sep 2026, down 4% from a year earlier and up 9% from the previous quarter. That is 0.1 years of trailing revenue already under contract. Book-to-bill last quarter: 1.03.
About these numbers
Remaining performance obligations (RPO) are revenue a company has contracted but not yet recognised, as reported in its SEC filings (XBRL tag RevenueRemainingPerformanceObligation). Coverage = backlog ÷ trailing twelve-month revenue. Book-to-bill = (change in backlog + revenue) ÷ revenue. Conversion = revenue recognised ÷ the backlog at the start of each quarter, summed over four quarters. Counterparty values come from company filings and releases.