Updated Jul 16, 2026 · Last SEC filing 2026-07-01
Solid Power, Inc. (SLDP) has filed 16 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-01. 6 Form 8-K material event filings were reported by SLDP in the last 90 days. 1 Form 144 notices of proposed sale were filed for SLDP stock. InsiderAlpha tracks every SLDP SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Miscellaneous Electrical Machinery, Equipment & Supplies (SIC 3690) |
|---|---|
| SEC CIK | 0001844862 |
| Form 4 filings (90d) | 16 |
|---|---|
| Form 8-K filings (90d) | 6 |
| Form 144 notices (90d) | 1 |
| Latest Form 4 filing | 2026-07-01 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Buettner-Garrett Joshua | Chief Technology Officer | F — Tax withholding / forfeiture | 33.8K | $2.60 | $88K | SEC | |
| Heller Linda C. | CFO, Treasurer, & Secretary | F — Tax withholding / forfeiture | 72.3K | $2.60 | $188K | SEC | |
| Van Scoter John C. | President & CEO | F — Tax withholding / forfeiture | 154.5K | $2.60 | $402K | SEC | |
| STEPHENS JOHN JOSEPH | Director | A — Grant or award | 44.1K | $0.00 | — | SEC | |
| Roe Lesa B | Director | A — Grant or award | 44.1K | $0.00 | — | SEC | |
| Goldberg Steven H | Director | A — Grant or award | 44.1K | $0.00 | — | SEC | |
| ANDERSON ERIK J | Director | A — Grant or award | 44.1K | $0.00 | — | SEC | |
| Roe Lesa B | Director | S — Open-market sale | 39.2K | $2.66 | $104K | SEC | |
| Miziolek Aleksandra A | Director | A — Grant or award | 44.1K | $0.00 | — | SEC | |
| Awada Kaled | Director | A — Grant or award | 44.1K | $0.00 | — | SEC | |
| Kreh Susan M | Director | A — Grant or award | 44.1K | $0.00 | — | SEC | |
| Goldberg Steven H | Director | A — Grant or award | 44.1K | $0.00 | — | SEC | |
| Wright MaryAnn | Director | A — Grant or award | 44.1K | $0.00 | — | SEC | |
| Buettner-Garrett Joshua | Chief Technology Officer | F — Tax withholding / forfeiture | 5.5K | $3.15 | $17K | SEC | |
| Heller Linda C. | CFO, Treasurer, & Secretary | F — Tax withholding / forfeiture | 136.1K | $3.08 | $419K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Solid Power, Inc. (SLDP). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Buettner-Garrett Joshua | 3 | $284K |
| Goldberg Steven H | 2 | — |
| Heller Linda C. | 2 | $607K |
| Van Scoter John C. | 2 | $1.35M |
| Roe Lesa B | 2 | $104K |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in SLDP insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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