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Ryan Cook

FSA, EA, CERA, MAAA
Consulting Actuary
Boise, ID, US

Ryan Cook is the lead and co-lead actuarial consultant for over a dozen clients at Milliman, including single-employer corporate pension and OPEB plans and public pension and OPEB plans.

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Experience

Client Projects

  • Funding valuations (PPA, PBGC, VEBA, and ADC)
  • Accounting valuations (ASC 715/960 and GASB 67/68/73/74/75)
  • Government filings (Forms 5500, PBGC Forms 10, and PBGC premium filings)
  • Experience studies
  • Deterministic and stochastic projections
  • Plan change/design studies
  • Plan de-risking studies
  • Plan terminations
  • Benefit calculations

Other Work

  • Serve as co-lead actuary in the development of Milliman's online projection tool
  • Develop and manage various firmwide Excel-based tools
  • Serve as ProVal expert within Milliman
  • Conduct firmwide training sessions
Publications

Read their latest work

Article

Milliman Pension Buyout Index January 2026

27 January 2026 - by Jake Pringle, Ryan Cook
Estimated competitive retiree buyout cost, as a percentage of accounting liability, increased by 20 bps from 100.1% to 100.3% during December.
Article

Milliman Pension Buyout Index December 2025

18 December 2025 - by Jake Pringle, Ryan Cook
Estimated competitive retiree buyout cost, as a percentage of accounting liability, stayed level at 100.1% during November.
Article

Milliman Pension Buyout Index November 2025

18 November 2025 - by Jake Pringle, Ryan Cook
Estimated competitive retiree buyout cost, as a percentage of accounting liability, decreased by 40 bps from 100.5% to 100.1% during October.
Article

Milliman Pension Buyout Index October 2025

23 October 2025 - by Jake Pringle, Ryan Cook
Estimated competitive retiree buyout cost, as a percentage of accounting liability, increased by 50 bps from 100.0% to 100.5% during September.
Article

Milliman Pension Buyout Index September 2025

15 September 2025 - by Jake Pringle, Ryan Cook
Estimated competitive retiree buyout cost, as a percentage of accounting liability, decreased by 10 bps from 100.1% to 100.0% during August.
Article

Milliman Pension Buyout Index August 2025

25 August 2025 - by Jake Pringle, Ryan Cook
Estimated competitive retiree buyout cost, as a percentage of accounting liability, decreased by 10 bps from 100.2% to 100.1% during July.
Article

Milliman Pension Buyout Index July 2025

22 July 2025 - by Jake Pringle, Ryan Cook
Estimated competitive retiree buyout cost, as a percentage of accounting liability, decreased by 60 bps from 100.8% to 100.2% during June.
Article

Milliman Pension Buyout Index June 2025

19 June 2025 - by Jake Pringle, Ryan Cook
Estimated competitive retiree buyout cost, as a percentage of accounting liability, decreased by 300 bps from 101.1% to 100.8% during May
Article

Milliman Pension Buyout Index May 2025

22 May 2025 - by Jake Pringle, Ryan Cook
Estimated competitive retiree buyout cost, as a percentage of accounting liability, decreased by 140 bps from 102.5% to 101.1% during April.
Article

2025 Corporate Pension Funding Study

30 April 2025 - by Zorast Wadia, Alan Perry, Ryan Cook
The funded percentage of the 100 largest corporate pension plans entered surplus territory in 2024, fueled by higher discount rates.