| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
Director | Executive Chairman | Interim CEO
1 company
Darin G Billerbeck is Director at MRAM. Darin G Billerbeck's net worth is not public. Form 4 filings only show shares in the companies where this person is an insider; those holdings are worth an estimated $1.7M at current prices.
Historically, Darin G Billerbeck's trades have earned a middling insider score of 57/100 across 19 rated trades. Over a 12-month horizon, 35.3% of those trades were profitable, with an average 12-month return of -14.2%.
The MRAM filings lean toward selling, a net 166,964 shares.
Darin G Billerbeck has 30 Form 4 filings on record from August 2018 to May 2026, all as Director at Everspin Technologies (MRAM), 2018–2026.
The 35 reported transactions were 20 open-market sales, 10 stock awards, 3 option exercises and 2 option or other derivative awards.
Counted by filing, the open-market trades come to no purchases and 20 sales worth about $2.4M.
The largest open-market sale was 30,000 shares of MRAM at an average $37.16 on May 11, 2026, about $1.1M.
None of the 4 sales since April 2023 was marked as made under a Rule 10b5-1 trading plan.
| Date | Ticker | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| May 11, 2026 | MRAM Everspin Technologies, Inc. | Director | Sale+OE | 30,000 | $37.16 | $1,114,800.00 | -19.5% | -60.0% | - | |
| Nov 10, 2025 | MRAM Everspin Technologies Inc. | Director | Sale+OE | 12,000 | $9.42 | $113,040.00 | -8.8% | +20.7% | - | |
| Dec 8, 2023 | MRAM Everspin Technologies Inc. | Director | Sell | 10,000 | $8.73 | $87,300.00 | -10.8% | -4.9% | -30.1% | |
| Aug 15, 2023 | MRAM Everspin Technologies Inc. | Director | Sale+OE | 10,000 | $9.63 | $96,300.00 | -8.9% | -11.2% | -46.2% | |
| Mar 8, 2023 | MRAM Everspin Technologies Inc. | Director | Sell | 10,000 | $6.67 | $66,700.00 | -10.4% | +25.5% | +23.1% | |
| Jan 3, 2023 | MRAM Everspin Technologies Inc. | Director | Sell | 1,281 | $5.51 | $7,058.31 | -1.3% | +24.5% | +59.3% | |
| Dec 2, 2022 | MRAM Everspin Technologies Inc. | Director | Sell | 3,637 | $6.31 | $22,949.47 | -3.6% | +10.4% | +43.1% | |
| Nov 2, 2022 | MRAM Everspin Technologies Inc. | Director | Sell | 3,527 | $6.16 | $21,726.32 | -3.4% | +17.9% | +42.9% | |
| Oct 1, 2022 | MRAM Everspin Technologies Inc. | Director | Sell | 3,375 | $6.18 | $20,857.50 | -3.1% | -4.0% | +73.1% | |
| Sep 1, 2022 | MRAM Everspin Technologies Inc. | Director | Sell | 3,524 | $6.89 | $24,280.36 | -3.2% | -1.2% | +46.1% |