LYTIR

Insider · SEC Form 4 · President, Revenue & Market Strategy

Buckley Sean Patrick

In the 12 months to Nov 8, 2026, on the open market: sold $3.0M of MGNI. Filed a median of 1 business day after the trade.

Open-market purchases and sales this filer reported on SEC Form 4, by the day traded. Insiders have two business days to file. A sale marked 10b5-1 was made under a plan adopted in advance. How to read these

Insider purchases and sales, by month (last 12 months)Insider purchases: $0 in total; Insider sales: $3.0M in total.Jun: Insider sales $365KJul: Insider sales $404KAug: Insider sales $1.9MNov: Insider sales $297KDecJanFebMarAprMayJunJulAugSepOctNov
Insider purchases above the line: $0Insider sales below: $3.0M
Dollar value of open-market purchases and sales reported on SEC Form 4, by the month traded. Sales include pre-arranged 10b5-1 plan sales.
  1. MGNISold: MAGNITE, INC. Nov 5, 2026 10,991 shares filed Nov 6, 2026 282,069 shares held directly after, as filed 10b5-1 plan filing $297K
  2. MGNISold: MAGNITE, INC. Aug 18, 2026 2,759 shares filed Aug 18, 2026 293,060 shares held directly after, as filed 10b5-1 plan filing $69K
  3. MGNISold: MAGNITE, INC. Aug 17, 2026 8,271 shares filed Aug 18, 2026 295,819 shares held directly after, as filed 10b5-1 plan filing $201K
  4. MGNISold: MAGNITE, INC. Aug 6, 2026 67,179 shares filed Aug 7, 2026 2 transactions 10b5-1 plan filing $1.6M
  5. MGNISold: MAGNITE, INC. Jul 7, 2026 19,233 shares filed Jul 9, 2026 354,281 shares held directly after, as filed 10b5-1 plan filing $404K
  6. MGNISold: MAGNITE, INC. Jun 17, 2026 19,233 shares filed Jun 18, 2026 373,514 shares held directly after, as filed 10b5-1 plan filing $365K

Source: SEC Form 4 filings. Value is shares × the price reported on the filing; a filing whose price failed Lytir's check against the market price is left out, and a trade that related owners reported on separate forms is counted once. Filings can be late, amended or wrong at the source; see methodology.

Other Form 4 entries

Not counted above: entries this filer reported on Form 4 in the same 12 months that are not open-market purchases or sales. Each entry is one line of a filing.

  • MGNI: shares withheld for tax or exercise price (code F), 1 entry, Aug 15, 2026
  • MGNI: option exercise or conversion (code M), 1 entry, Aug 6, 2026
Code F
Shares paid to, or withheld by, the company to cover an exercise price or the tax due on an award.
Code M
An exercise or conversion of a derivative security received from the company, such as stock options.

Source: the same SEC Form 4 filings. The codes are the SEC's own transaction codes; the meanings above are a plain-words reading of the SEC's Form 4 instructions.