Brian Gephart
CIK 1778484 · CHIEF FINANCIAL OFFICER · last filed 2026-10-02
Brian Gephart is a CHIEF FINANCIAL OFFICER who has filed 54 SEC Form 4 insider transactions across 2 companies since 2019. The most recent filing, for MGNI, was dated Oct 2, 2026. Across all open-market trades the lifetime net is −$1.6M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $3.6M across reported positions. 18 SEC filings were submitted jointly with DEMAND MEDIA INC.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
MGNI price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
SANTA MONICA, MA 90404
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| MGNI | CHIEF FINANCIAL OFFICER | 167,010 | $21.62 | $3.61M | -$1.60M | 30 | 2026-10-02 |
| LEAF GROUP LTD. (LEAF) Delisted | Chief Financial Officer | 123,988 | $8.49 | $1.05M | $0 | 16 | 2021-06-02 |
Recent Filings
54 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-10-02 | MGNI | Grant (A) | +64,682 | $0 | EDGAR |
| 2026-08-18 | MGNI | Tax (F) | −3,789 | -$93.7K | EDGAR |
| 2026-08-12 | MGNI | Sell (S) | −12,479 | -$308.0K | EDGAR |
| 2026-08-10 | MGNI | Notice (144) | −12,479 | -$308.0K | EDGAR |
| 2026-05-19 | MGNI | Tax (F) | −3,789 | -$48.6K | EDGAR |
| 2026-02-18 | MGNI | Tax (F) | −6,149 | -$71.9K | EDGAR |
| 2026-01-05 | MGNI | Grant (A) | +39,185 | $0 | EDGAR |
| 2025-11-18 | MGNI | Tax (F) | −3,549 | -$50.2K | EDGAR |
| 2025-09-05 | MGNI | Sell (S) | −27,671 | -$683.8K | EDGAR |
| 2025-09-04 | MGNI | Notice (144) | −27,671 | -$683.8K | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.