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Brian Gephart

CIK 1778484 · CHIEF ACCOUNTING OFFICER · last filed 2026-08-18

Brian Gephart is a CHIEF ACCOUNTING OFFICER who has filed 53 SEC Form 4 insider transactions across 2 companies since 2019. The most recent filing shows the insider had shares withheld for taxes covering $93.7K of MGNI on Aug 18, 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 $2.4M 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.

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Disclosed Exposure

$2.43M

Companies

2

Total Filings

53

Lifetime Open-Market Net

-$1.60M

Filer Profile

Reported Address
1655 26TH STREET
SANTA MONICA, MA 90404
Related Filers
DEMAND MEDIA INC. — 18 joint filings, latest 2021-06-16
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
MGNI CHIEF ACCOUNTING OFFICER 102,328 $23.77 $2.43M -$1.60M 29 2026-08-18
LEAF GROUP LTD. (LEAF) Delisted Chief Financial Officer 123,988 $8.49 $1.05M $0 16 2021-06-02

Recent Filings

53 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
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
2025-08-20 MGNI Sell (S) −2,961 -$70.6K EDGAR
Showing 1–10 of 53
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
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.