STOCK TITAN

[Form 4] Magnite, Inc. Insider Trading Activity

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4
Rhea-AI Filing Summary

Magnite, Inc. (MGNI) – Form 4 insider transaction

On 18 June 2025, company director James Rossman executed an open-market sale of 137,007 common shares under a Rule 10b5-1 trading plan adopted on 10 March 2025. The weighted-average sale price reported was $18.78 per share, with individual trades ranging from $18.78 to $18.82. Gross proceeds are therefore approximately $2.6 million (calculated from the weighted price disclosed).

After the transaction Rossman retains 93,679 shares held directly. Based on the reported numbers, the sale reduced his direct ownership by roughly 59 percent. No derivative securities were exercised or reported, and no additional purchases or sales were disclosed.

The filing is routine in that it documents a pre-planned disposition, yet the size of the sale may draw investor attention because it involves a majority of the insider’s previously held shares. Because the transaction was executed pursuant to a 10b5-1 plan, signaling risk is mitigated but not eliminated.

Magnite, Inc. (MGNI) – Transazione interna Form 4

Il 18 giugno 2025, il direttore della società James Rossman ha effettuato una vendita sul mercato aperto di 137.007 azioni ordinarie secondo un piano di trading Rule 10b5-1 adottato il 10 marzo 2025. Il prezzo medio ponderato di vendita riportato è stato di 18,78 $ per azione, con singole transazioni comprese tra 18,78 e 18,82 $. Pertanto, i proventi lordi sono circa 2,6 milioni di dollari (calcolati sul prezzo ponderato dichiarato).

Dopo la transazione, Rossman detiene ancora 93.679 azioni direttamente. Dai dati riportati, la vendita ha ridotto la sua partecipazione diretta di circa il 59%. Non sono stati esercitati o segnalati titoli derivati, né sono state comunicate ulteriori compravendite.

La comunicazione è di routine in quanto documenta una cessione pianificata in anticipo, ma l’entità della vendita potrebbe attirare l’attenzione degli investitori poiché riguarda la maggior parte delle azioni precedentemente detenute dall’insider. Poiché la transazione è stata eseguita in base a un piano 10b5-1, il rischio di segnalazione è attenuato ma non completamente eliminato.

Magnite, Inc. (MGNI) – Transacción interna Formulario 4

El 18 de junio de 2025, el director de la empresa James Rossman realizó una venta en el mercado abierto de 137,007 acciones ordinarias bajo un plan de negociación Rule 10b5-1 adoptado el 10 de marzo de 2025. El precio promedio ponderado reportado fue de , con operaciones individuales que oscilaron entre $18.78 y $18.82. Los ingresos brutos son aproximadamente 2.6 millones de dólares (calculados según el precio ponderado informado).

Después de la transacción, Rossman mantiene 93,679 acciones en propiedad directa. Según los números reportados, la venta redujo su propiedad directa en aproximadamente un 59%. No se ejercieron ni reportaron valores derivados, y no se divulgaron compras o ventas adicionales.

La presentación es rutinaria ya que documenta una disposición preplanificada, pero el tamaño de la venta puede atraer la atención de los inversores porque implica la mayoría de las acciones que el insider poseía anteriormente. Debido a que la transacción se ejecutó conforme a un plan 10b5-1, el riesgo de señalización se mitiga pero no se elimina.

Magnite, Inc. (MGNI) – Form 4 내부자 거래

2025년 6월 18일에 회사 이사 James Rossman2025년 3월 10일에 채택된 Rule 10b5-1 거래 계획에 따라 137,007주 보통주를 장외 시장에서 매도했습니다. 보고된 가중 평균 매도 가격은 주당 $18.78이며, 개별 거래 가격은 $18.78에서 $18.82 사이였습니다. 따라서 총 매출액은 약 260만 달러로 추산됩니다(공개된 가중 가격 기준).

거래 후 Rossman은 직접 보유한 93,679주를 유지합니다. 보고된 수치에 따르면, 이번 매도로 그의 직접 소유 지분이 약 59% 감소했습니다. 파생상품 행사나 보고는 없었으며, 추가 매수 또는 매도도 공개되지 않았습니다.

이번 신고는 사전 계획된 처분을 문서화하는 일상적인 절차이지만, 매도 규모가 내부자가 이전에 보유한 주식의 대다수를 포함하고 있어 투자자의 관심을 끌 수 있습니다. 거래가 10b5-1 계획에 따라 실행되었기 때문에 신호 위험은 완화되었으나 완전히 제거되지는 않았습니다.

Magnite, Inc. (MGNI) – Transaction d'initié Formulaire 4

Le 18 juin 2025, le directeur de la société James Rossman a réalisé une vente sur le marché libre de 137 007 actions ordinaires dans le cadre d'un plan de négociation Rule 10b5-1 adopté le 10 mars 2025. Le prix de vente moyen pondéré déclaré était de 18,78 $ par action, avec des transactions individuelles allant de 18,78 $ à 18,82 $. Les produits bruts s'élèvent donc à environ 2,6 millions de dollars (calculés à partir du prix pondéré divulgué).

Après la transaction, Rossman conserve 93 679 actions détenues directement. Selon les chiffres rapportés, la vente a réduit sa détention directe d'environ 59 %. Aucun instrument dérivé n'a été exercé ou signalé, et aucune autre opération d'achat ou de vente n'a été divulguée.

Le dépôt est de routine puisqu'il documente une cession planifiée à l'avance, mais la taille de la vente pourrait attirer l'attention des investisseurs car elle concerne la majorité des actions précédemment détenues par l'initié. Étant donné que la transaction a été exécutée conformément à un plan 10b5-1, le risque de signalement est atténué mais pas éliminé.

Magnite, Inc. (MGNI) – Form 4 Insider-Transaktion

Am 18. Juni 2025 führte der Unternehmensdirektor James Rossman einen Verkauf von 137.007 Stammaktien im offenen Markt durch, basierend auf einem Rule 10b5-1 Handelsplan, der am 10. März 2025 angenommen wurde. Der gemeldete gewichtete Durchschnittspreis lag bei 18,78 $ pro Aktie, mit Einzeltransaktionen zwischen 18,78 $ und 18,82 $. Die Bruttoerlöse betragen somit etwa 2,6 Millionen US-Dollar (berechnet auf Basis des angegebenen gewichteten Preises).

Nach der Transaktion hält Rossman weiterhin 93.679 Aktien direkt. Den gemeldeten Zahlen zufolge verringerte der Verkauf seinen direkten Anteil um etwa 59 Prozent. Es wurden keine Derivate ausgeübt oder gemeldet, und keine weiteren Käufe oder Verkäufe offengelegt.

Die Meldung ist routinemäßig, da sie eine vorab geplante Veräußerung dokumentiert, doch die Größe des Verkaufs könnte Investoren Aufmerksamkeit erregen, da sie die Mehrheit der zuvor gehaltenen Insider-Aktien betrifft. Da die Transaktion gemäß einem 10b5-1-Plan durchgeführt wurde, ist das Signalisierungsrisiko gemindert, aber nicht ausgeschlossen.

Positive
  • Sale executed under a pre-arranged Rule 10b5-1 plan, reducing concerns about opportunistic insider timing and supporting governance transparency.
Negative
  • Director disposed of 137,007 shares, cutting his direct stake by roughly 59%, which some investors may interpret as reduced insider confidence.

Insights

TL;DR – Director sells 137k MGNI shares (~$2.6m) via 10b5-1 plan; signal largely neutral but trims stake 59%.

The trade shows a substantial reduction in Director James Rossman’s direct holdings—from roughly 231k to 94k shares—suggesting limited near-term confidence but executed under a pre-arranged plan, reducing adverse interpretation. Transaction value of about $2.6 million is small relative to Magnite’s market capitalization, so fundamental impact on valuation is negligible. Liquidity effect is minimal and no derivatives were involved. Overall market reaction is expected to be muted, though some investors may perceive heightened governance scrutiny due to the sizable percentage sold.

TL;DR – Large insider sale balanced by 10b5-1 disclosure; governance risk low.

From a governance standpoint, the clear disclosure of the 10b5-1 plan, adoption date, and weighted-average pricing fulfils best-practice transparency. The director retains nearly 94k shares, keeping an economic stake aligned with shareholders. While a 59% reduction invites questions about future commitment, the plan’s existence weakens any inference of opportunistic timing. No red flags such as option exercises, concurrent resignations, or clustered insider selling are evident. Therefore, the event is classified as neutral for governance risk.

Magnite, Inc. (MGNI) – Transazione interna Form 4

Il 18 giugno 2025, il direttore della società James Rossman ha effettuato una vendita sul mercato aperto di 137.007 azioni ordinarie secondo un piano di trading Rule 10b5-1 adottato il 10 marzo 2025. Il prezzo medio ponderato di vendita riportato è stato di 18,78 $ per azione, con singole transazioni comprese tra 18,78 e 18,82 $. Pertanto, i proventi lordi sono circa 2,6 milioni di dollari (calcolati sul prezzo ponderato dichiarato).

Dopo la transazione, Rossman detiene ancora 93.679 azioni direttamente. Dai dati riportati, la vendita ha ridotto la sua partecipazione diretta di circa il 59%. Non sono stati esercitati o segnalati titoli derivati, né sono state comunicate ulteriori compravendite.

La comunicazione è di routine in quanto documenta una cessione pianificata in anticipo, ma l’entità della vendita potrebbe attirare l’attenzione degli investitori poiché riguarda la maggior parte delle azioni precedentemente detenute dall’insider. Poiché la transazione è stata eseguita in base a un piano 10b5-1, il rischio di segnalazione è attenuato ma non completamente eliminato.

Magnite, Inc. (MGNI) – Transacción interna Formulario 4

El 18 de junio de 2025, el director de la empresa James Rossman realizó una venta en el mercado abierto de 137,007 acciones ordinarias bajo un plan de negociación Rule 10b5-1 adoptado el 10 de marzo de 2025. El precio promedio ponderado reportado fue de , con operaciones individuales que oscilaron entre $18.78 y $18.82. Los ingresos brutos son aproximadamente 2.6 millones de dólares (calculados según el precio ponderado informado).

Después de la transacción, Rossman mantiene 93,679 acciones en propiedad directa. Según los números reportados, la venta redujo su propiedad directa en aproximadamente un 59%. No se ejercieron ni reportaron valores derivados, y no se divulgaron compras o ventas adicionales.

La presentación es rutinaria ya que documenta una disposición preplanificada, pero el tamaño de la venta puede atraer la atención de los inversores porque implica la mayoría de las acciones que el insider poseía anteriormente. Debido a que la transacción se ejecutó conforme a un plan 10b5-1, el riesgo de señalización se mitiga pero no se elimina.

Magnite, Inc. (MGNI) – Form 4 내부자 거래

2025년 6월 18일에 회사 이사 James Rossman2025년 3월 10일에 채택된 Rule 10b5-1 거래 계획에 따라 137,007주 보통주를 장외 시장에서 매도했습니다. 보고된 가중 평균 매도 가격은 주당 $18.78이며, 개별 거래 가격은 $18.78에서 $18.82 사이였습니다. 따라서 총 매출액은 약 260만 달러로 추산됩니다(공개된 가중 가격 기준).

거래 후 Rossman은 직접 보유한 93,679주를 유지합니다. 보고된 수치에 따르면, 이번 매도로 그의 직접 소유 지분이 약 59% 감소했습니다. 파생상품 행사나 보고는 없었으며, 추가 매수 또는 매도도 공개되지 않았습니다.

이번 신고는 사전 계획된 처분을 문서화하는 일상적인 절차이지만, 매도 규모가 내부자가 이전에 보유한 주식의 대다수를 포함하고 있어 투자자의 관심을 끌 수 있습니다. 거래가 10b5-1 계획에 따라 실행되었기 때문에 신호 위험은 완화되었으나 완전히 제거되지는 않았습니다.

Magnite, Inc. (MGNI) – Transaction d'initié Formulaire 4

Le 18 juin 2025, le directeur de la société James Rossman a réalisé une vente sur le marché libre de 137 007 actions ordinaires dans le cadre d'un plan de négociation Rule 10b5-1 adopté le 10 mars 2025. Le prix de vente moyen pondéré déclaré était de 18,78 $ par action, avec des transactions individuelles allant de 18,78 $ à 18,82 $. Les produits bruts s'élèvent donc à environ 2,6 millions de dollars (calculés à partir du prix pondéré divulgué).

Après la transaction, Rossman conserve 93 679 actions détenues directement. Selon les chiffres rapportés, la vente a réduit sa détention directe d'environ 59 %. Aucun instrument dérivé n'a été exercé ou signalé, et aucune autre opération d'achat ou de vente n'a été divulguée.

Le dépôt est de routine puisqu'il documente une cession planifiée à l'avance, mais la taille de la vente pourrait attirer l'attention des investisseurs car elle concerne la majorité des actions précédemment détenues par l'initié. Étant donné que la transaction a été exécutée conformément à un plan 10b5-1, le risque de signalement est atténué mais pas éliminé.

Magnite, Inc. (MGNI) – Form 4 Insider-Transaktion

Am 18. Juni 2025 führte der Unternehmensdirektor James Rossman einen Verkauf von 137.007 Stammaktien im offenen Markt durch, basierend auf einem Rule 10b5-1 Handelsplan, der am 10. März 2025 angenommen wurde. Der gemeldete gewichtete Durchschnittspreis lag bei 18,78 $ pro Aktie, mit Einzeltransaktionen zwischen 18,78 $ und 18,82 $. Die Bruttoerlöse betragen somit etwa 2,6 Millionen US-Dollar (berechnet auf Basis des angegebenen gewichteten Preises).

Nach der Transaktion hält Rossman weiterhin 93.679 Aktien direkt. Den gemeldeten Zahlen zufolge verringerte der Verkauf seinen direkten Anteil um etwa 59 Prozent. Es wurden keine Derivate ausgeübt oder gemeldet, und keine weiteren Käufe oder Verkäufe offengelegt.

Die Meldung ist routinemäßig, da sie eine vorab geplante Veräußerung dokumentiert, doch die Größe des Verkaufs könnte Investoren Aufmerksamkeit erregen, da sie die Mehrheit der zuvor gehaltenen Insider-Aktien betrifft. Da die Transaktion gemäß einem 10b5-1-Plan durchgeführt wurde, ist das Signalisierungsrisiko gemindert, aber nicht ausgeschlossen.

SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
X
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Rossman James

(Last) (First) (Middle)
C/O MAGNITE, INC.
1250 BROADWAY, 15TH FLOOR

(Street)
NEW YORK NY 10001

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
MAGNITE, INC. [ MGNI ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
06/18/2025
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 06/18/2025 S(1) 137,007 D $18.78(2) 93,679 D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Explanation of Responses:
1. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 10, 2025.
2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.78 to $18.82, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
/s/ Aaron Saltz, attorney-in-fact 06/20/2025
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

How many Magnite (MGNI) shares did Director James Rossman sell?

He sold 137,007 common shares on 18 June 2025.

At what price were the MGNI shares sold?

The weighted-average price was $18.78, with individual trades between $18.78 and $18.82.

Does Rossman still own Magnite shares after the sale?

Yes, he still directly owns 93,679 shares following the transaction.

Was the sale part of a Rule 10b5-1 trading plan?

Yes. The plan was adopted on 10 March 2025, and the sale was executed under its terms.

What is the approximate value of the MGNI shares sold?

Based on the weighted-average price, the sale is valued at roughly $2.6 million.

Did the filing report any derivative security transactions?

No derivative securities were acquired or disposed of in this filing.
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