![John Miller](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
John Miller
Director of Finance/CFO at
CAPSTONE ENERGY+, INC.
Net worth: 604 637 $ as of 2026-09-29
Profile
John P.
Miller is currently Independent Director at Capstone Distributor Support Services Corp.
since 2024, Lead Independent Director at Spruce Power Holding Corp.
since 2024, and Chief Financial Officer & Executive Director at Capstone Energy+, Inc. starting in 2025.
Former positions include President & Chief Executive Officer at Power Solutions International, Inc. from 2017 to 2021, Senior VP-Operations & Corporate Finance at Navistar International Corp.
from 2008 to 2016, Chief Financial Officer roles at Peapod LLC, FleetPride, Inc. from 1998 to 2001, Chicago Metallic Corp.
from 2001 to 2003, Laidlaw Transit, Inc. from 2003 to 2007, and Laidlaw International, Inc. Education includes undergraduate studies at DePauw University and an MBA from the University of Michigan.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-06-15 | 203,826 ( 1.06% ) | 348 542 $ | 2026-09-29 | |
| 2026-08-31 | 57,164 ( 0.18% ) | 256 095 $ | 2026-09-29 |
John Miller active positions
| Companies | Position | Start |
|---|---|---|
| SPRUCE POWER HOLDING CORPORATION | Director/Board Member | 2022-02-28 |
| CAPSTONE ENERGY+, INC. | Director of Finance/CFO | 2025-11-01 |
Capstone Green Energy Corp.
 Capstone Green Energy Corp. Electrical ProductsProducer Manufacturing Develops, manufactures and markets microturbine technology solutions | Director/Board Member | 2024-02-25 |
Former positions of John Miller
| Companies | Position | End |
|---|---|---|
| POWER SOLUTIONS INTERNATIONAL, INC. | Chief Executive Officer | 2021-02-14 |
| NAVISTAR INTERNATIONAL CORPORATION | Corporate Officer/Principal | 2015-12-31 |
Laidlaw Transit, Inc.
 Laidlaw Transit, Inc. Other TransportationTransportation Provides transportation services to schools | Director of Finance/CFO | 2006-12-31 |
Chicago Metallic Corp.
 Chicago Metallic Corp. Wholesale DistributorsDistribution Services Provides building products and services, including metal ceiling systems and coil coating | Director of Finance/CFO | 2003-04-30 |
FleetPride, Inc.
 FleetPride, Inc. Wholesale DistributorsDistribution Services Distributes and repairs heavy duty truck & trailer parts | Director of Finance/CFO | 2000-12-31 |
Education of John Miller
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
62
1st degree connections
12
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 12 |
|---|---|
Navistar International Corp.
 Navistar International Corp. Motor VehiclesConsumer Durables Manufactures and sells commercial trucks, buses, engines & powertrain and parts | Consumer Durables |
Peapod LLC
 Peapod LLC Food RetailRetail Trade Provides on-line grocery service | Retail Trade |
FleetPride, Inc.
FleetPride, Inc. Wholesale DistributorsDistribution Services Distributes and repairs heavy duty truck & trailer parts | Distribution Services |
Capstone Green Energy Corp.
Capstone Green Energy Corp. Electrical ProductsProducer Manufacturing Develops, manufactures and markets microturbine technology solutions | Producer Manufacturing |
Laidlaw Transit, Inc.
Laidlaw Transit, Inc. Other TransportationTransportation Provides transportation services to schools | Transportation |
Laidlaw International, Inc.
 Laidlaw International, Inc. Other TransportationTransportation Provides urban transportation services | Transportation |
DePauw University
 DePauw University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
University of Michigan
 University of Michigan Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Chicago Metallic Corp.
Chicago Metallic Corp. Wholesale DistributorsDistribution Services Provides building products and services, including metal ceiling systems and coil coating | Distribution Services |
Power Solutions International, Inc.
 Power Solutions International, Inc. Auto Parts: OEMProducer Manufacturing Engages in designing, engineering, manufacturing, marketing and selling of emission-certified engines & power systems | Producer Manufacturing |
Capstone Turbine International, Inc.
 Capstone Turbine International, Inc. Electrical ProductsProducer Manufacturing Manufactures and distributes gas turbine | Producer Manufacturing |
Spruce Power Holding Corp.
 Spruce Power Holding Corp. Electric UtilitiesUtilities Engages in the operation of distributed solar energy assets | Utilities |
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