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| Keyboard |
| Rubicon Project Inc | |
|---|---|
| Ticker | MGNI |
| CIK # | 0001595974 |
| CUSIP | 55955D100 |
| Sector | Technology - Services-Computer Programming, Data Processing, Etc. |
| Address | 12181 Bluff Creek Drive, 4th Floor, Los Angeles, CA 90094 |
| Source | [EDGAR] |
| CIK | Filing | 2011 - 2026 |
|---|---|---|
| [0001595974] | 10-K | |
| [0001595974] | 10-Q | |
| [0001595974] | 3 | |
| [0001595974] | 4 | |
| [0001595974] | 8-K | |
| [0001595974] | SC 13D | |
| [0001595974] | SC 13G |
| Insider Transaction (Form 3/4/5) | Date | Action | Shares | Price | Value ($) |
|---|---|---|---|---|---|
|
Soroca Adam Lee
Common Stock
|
2026-02-18 | Sell | 21,529 | $12.00 | 258,348 |
|
Soroca Adam Lee
Common Stock
|
2026-02-15 | Tax withheld | 18,933 | $11.70 | 221,516 |
|
Buonasera David
Common Stock
|
2026-02-15 | Tax withheld | 17,137 | $11.70 | 200,503 |
|
Saltz Aaron
Common Stock
|
2026-02-15 | Tax withheld | 12,761 | $11.70 | 149,304 |
|
Barrett Michael G
Common Stock
|
2026-02-15 | Tax withheld | 23,549 | $11.70 | 275,523 |
|
Gephart Brian
Common Stock
|
2026-02-15 | Tax withheld | 6,149 | $11.70 | 71,943 |
|
Day David
Common Stock
|
2026-02-15 | Tax withheld | 30,617 | $11.70 | 358,219 |
|
Buckley Sean Patrick
Common Stock
|
2026-02-15 | Tax withheld | 26,942 | $11.70 | 315,221 |
|
Evans Katie Seitz
Common Stock
|
2026-02-15 | Tax withheld | 27,428 | $11.70 | 320,908 |
|
Evans Katie Seitz
Common Stock
|
2026-01-09 | Option exercise | 51,300 | $0.00 | |
|
Saltz Aaron
Common Stock
|
2026-01-09 | Tax withheld | 15,026 | $16.17 | 242,970 |
|
Barrett Michael G
Common Stock
|
2026-01-09 | Option exercise | 213,750 | $0.00 | |
|
Barrett Michael G
Common Stock
|
2026-01-09 | Tax withheld | 109,742 | $16.17 | 1,774,528 |
|
Buonasera David
Common Stock
|
2026-01-09 | Option exercise | 22,935 | $0.00 | |
|
Day David
Performance Stock Units · derivative
|
2026-01-09 | Option exercise | 72,675 | $0.00 | |
|
Soroca Adam Lee
Performance Stock Units · derivative
|
2026-01-09 | Option exercise | 51,300 | $0.00 | |
|
Buckley Sean Patrick
Common Stock
|
2026-01-09 | Tax withheld | 30,369 | $16.17 | 491,067 |
|
Evans Katie Seitz
Performance Stock Units · derivative
|
2026-01-09 | Option exercise | 51,300 | $0.00 | |
|
Day David
Common Stock
|
2026-01-09 | Tax withheld | 35,169 | $16.17 | 568,683 |
|
Buonasera David
Performance Stock Units · derivative
|
2026-01-09 | Option exercise | 22,935 | $0.00 | |
| showing 20 of 200 most recent transactions | |||||
| 13F Ownership Over Time | Holders | Shares Held |
|---|---|---|
| 2026-03-31 | 297 | 136,769,081 |
| 2025-12-31 | 308 | 144,463,536 |
| 2025-09-30 | 323 | 144,707,968 |
| 2025-06-30 | 293 | 154,709,324 |
| 2025-03-31 | 299 | 139,672,498 |
| 2024-12-31 | 289 | 130,684,483 |
| 2024-09-30 | 283 | 126,030,183 |
| 2024-06-30 | 272 | 109,031,905 |
| 2024-03-31 | 238 | 108,450,862 |
| 2023-12-31 | 220 | 107,711,412 |
| 2023-09-30 | 218 | 108,212,399 |
| 2023-06-30 | 227 | 106,182,777 |