MGNINasdaqServices-Computer Programming, Data Processing, Etc.Fiscal year ends December 31
MAGNITE, INC.
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 5, 2026
$23.55+0.18 (+0.77%)
Close on Oct 19, 2026
- Market cap
- $3.47B
- P/E (TTM)
- 22.4
- Dividend yield
- –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
99.4%
143M of 143M shares
Institutional holders
310
56 new, 37 sold out
Net institutional buying
11M
In Q2 2026
Insider trades, 12 months
0 buys · 51 sales
Net sold $26.65M
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| Wellington Management Group LLP | 8,629,238 | 6.00% | 13G (passive) | Dec 31, 2025 |
| Abigail P. Johnson | 8,124,920 | 5.70% | 13G (passive) amendment | Nov 28, 2025 |
| Vanguard Portfolio Management | 7,849,870 | 5.43% | 13G (passive) | Mar 31, 2026 |
| FMR LLC | 7,759,426 | 5.40% | 13G (passive) | Jun 30, 2026 |
| Vanguard Capital Management | 7,283,329 | 5.04% | 13G (passive) | Mar 31, 2026 |
| BlackRock, Inc. | 10,030,800 | 7.30% | 13G (passive) amendment | Dec 31, 2023 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of MGNI | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| BlackRock, Inc. | 12,713,156 | 8.86% | $241.30M | +1,055,660 | 0.00% |
| Vanguard Portfolio Management LLC | 8,197,286 | 5.72% | $155.58M | +471,081 | 0.01% |
| FMR LLC | 7,759,426 | 5.41% | $147.27M | +3,252,007 | 0.01% |
| Vanguard Capital Management LLC | 6,225,195 | 4.34% | $118.15M | +34,792 | 0.00% |
| Wellington Management Group Llp | 6,044,492 | 4.21% | $114.72M | −3,146,585 | 0.02% |
| Dimensional Fund Advisors LP | 5,260,132 | 3.67% | $99.84M | +1,276,458 | 0.02% |
| Boston Partners | 5,013,835 | 3.50% | $95.85M | +293,972 | 0.09% |
| American Century Companies Inc | 4,622,736 | 3.22% | $87.74M | −4,080 | 0.04% |
| Capital Research Global Investors | 3,869,159 | 2.70% | $73.44M | −1,151,130 | 0.01% |
| Nuveen, LLC | 3,794,811 | 2.65% | $72.03M | +204,786 | 0.02% |
| Geode Capital Management, LLC | 3,789,959 | 2.64% | $71.95M | +236,169 | 0.00% |
| Edenbrook Capital, LLC | 3,555,615 | 2.48% | $67.49M | +757,579 | 13.60% |
| State Street Corp | 3,528,075 | 2.46% | $66.96M | +364,936 | 0.00% |
| 325 Capital LLC | 3,412,694 | 2.38% | $64.77M | +1,407,307 | 15.44% |
| Nine Ten Capital Management LLC | 3,261,283 | 2.27% | $61.90M | −220,000 | 19.26% |
| Granahan Investment Management, LLC | 3,083,211 | 2.15% | $58.52M | +529,798 | 2.09% |
| Canada Pension Plan Investment Board | 2,995,093 | 2.09% | $56.85M | +2,949,041 | 0.03% |
| Jane Street Group, LLC | 2,199,191 | 1.53% | $41.74M | +531,031 | 0.00% |
| Park West Asset Management LLC | 2,000,000 | 1.39% | $37.96M | +1,401,620 | 2.59% |
| Morgan Stanley | 1,991,732 | 1.39% | $37.80M | +1,064,913 | 0.00% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 310 | 143M | 99.4% | 56 / 116 | 89 / 37 | 27M | 16M |
| Q1 2026 | 297 | 132M | 91.7% | 52 / 114 | 80 / 54 | 33M | 23M |
| Q4 2025 | 304 | 137M | 95.3% | 56 / 122 | 93 / 56 | 26M | 28M |
| Q3 2025 | 317 | 139M | 97.1% | 73 / 82 | 125 / 41 | 18M | 26M |
| Q2 2025 | 286 | 147M | 100.0% | 53 / 99 | 98 / 58 | 27M | 13M |
| Q1 2025 | 293 | 133M | 92.8% | 52 / 105 | 96 / 42 | 29M | 15M |
| Q4 2024 | 286 | 123M | 86.1% | 52 / 99 | 95 / 38 | 21M | 17M |
| Q3 2024 | 280 | 121M | 84.4% | 45 / 105 | 78 / 30 | 34M | 8M |
| Q2 2024 | 269 | 106M | 73.8% | 70 / 103 | 65 / 30 | 15M | 14M |
| Q1 2024 | 231 | 105M | 73.3% | 39 / 75 | 69 / 24 | 7M | 7M |
| Q4 2023 | 217 | 105M | 72.9% | 32 / 62 | 71 / 28 | 12M | 11M |
| Q3 2023 | 214 | 103M | 72.2% | 34 / 68 | 66 / 39 | 16M | 14M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of MGNI | Value | % of fund | As of |
|---|---|---|---|---|---|
| Vanguard Total Stock Market Index Fund | 4,326,601 | 3.02% | $82.12M | 0.00% | Jun 30, 2026 |
| SMALLCAP World Fund Inc | 3,796,613 | 2.65% | $72.06M | 0.08% | Jun 30, 2026 |
| iShares Russell 2000 ETF | 3,706,804 | 2.58% | $70.36M | 0.08% | Jun 30, 2026 |
| Vanguard Small-Cap Index Fund | 3,116,881 | 2.17% | $59.16M | 0.03% | Jun 30, 2026 |
| Small Cap Growth Fund | 2,943,653 | 2.05% | $56.81M | 1.02% | Jul 31, 2026 |
| Vanguard Small-Cap Value Index Fund | 1,976,558 | 1.38% | $37.52M | 0.06% | Jun 30, 2026 |
| Vanguard Extended Market Index Fund | 1,644,422 | 1.15% | $31.21M | 0.03% | Jun 30, 2026 |
| Fidelity Small Cap Index Fund | 1,579,669 | 1.10% | $30.49M | 0.09% | Jul 31, 2026 |
| College Retirement Equities Fund - Total Global Stock Account | 1,484,347 | 1.03% | $28.17M | 0.02% | Jun 30, 2026 |
| Select Communication Services Portfolio | 1,472,463 | 1.03% | $21.10M | 0.74% | May 31, 2026 |
| Fidelity Balanced Fund | 1,288,989 | 0.90% | $18.47M | 0.03% | May 31, 2026 |
| Fidelity Small Cap Growth Fund | 1,117,610 | 0.78% | $21.57M | 0.25% | Jul 31, 2026 |
| JNL Multi-Manager Small Cap Growth Fund | 868,393 | 0.61% | $16.48M | 0.65% | Jun 30, 2026 |
| iShares Russell 2000 Growth ETF | 778,141 | 0.54% | $14.77M | 0.10% | Jun 30, 2026 |
| U.S. Small Cap Value Portfolio | 768,060 | 0.54% | $14.82M | 0.08% | Jul 31, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Michael G. Barrett | CEO, Director | 399,983 | 0.28% | Aug 18, 2026 |
| David Buonasera | CHIEF TECHNOLOGY OFFICER | 245,155 | 0.17% | Sep 16, 2026 |
| Aaron Saltz | CHIEF LEGAL OFFICER | 224,389 | 0.16% | Sep 11, 2026 |
| Katie Seitz Evans | See Remarks | 441,800 | 0.31% | Sep 11, 2026 |
| Sean Patrick Buckley | See Remarks | 293,060 | 0.20% | Aug 18, 2026 |
| Brian Gephart | CHIEF ACCOUNTING OFFICER | 102,328 | 0.07% | Aug 18, 2026 |
| David Day | CHIEF FINANCIAL OFFICER | 452,861 | 0.32% | Aug 18, 2026 |
| Adam Lee Soroca | CHIEF PRODUCT OFFICER | 388,425 | 0.27% | Feb 18, 2026 |
| Paul Caine | Director | 137,401 | 0.10% | Sep 18, 2026 |
| Douglas S. Knopper | Director | 51,136 | 0.04% | Sep 18, 2026 |
| Robert F. Spillane | Director | 57,715 | 0.04% | Sep 16, 2026 |
| Sarah Patricia Harden | Director | 114,751 | 0.08% | Aug 28, 2026 |
| Rachel Lam | Director | 230,620 | 0.16% | Aug 12, 2026 |
| David T. Pearson | Director | 79,001 | 0.06% | Jun 10, 2026 |
| James Rossman | Director | 107,477 | 0.07% | Jun 10, 2026 |
| Diane Yu | Director | 81,279 | 0.06% | Jun 10, 2026 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Paul Caine Director | Sep 17, 2026 | Sale(10b5-1 plan) | −7,500 | $26.50 | $198.75K | 137,401 |
| Douglas S. Knopper Director | Sep 17, 2026 | Sale(10b5-1 plan) | −37,337 | $26.28 | $981.22K | 51,136 |
| Robert F. Spillane Director | Sep 14, 2026 | Sale | −10,363 | $23.76 | $246.22K | 57,715 |
| Robert F. Spillane Director | Sep 14, 2026 | Option exercise | +10,363 | $5.17 | $53.58K | 68,078 |
| David Buonasera CHIEF TECHNOLOGY OFFICER | Sep 14, 2026 | Sale(10b5-1 plan) | −1,165 | $24.00 | $27.96K | 245,155 |
| Katie Seitz Evans See Remarks | Sep 11, 2026 | Sale(10b5-1 plan) | −13,997 | $24.00 | $335.93K | 441,800 |
| Aaron Saltz CHIEF LEGAL OFFICER | Sep 10, 2026 | Sale(10b5-1 plan) | −40,000 | $23.41 | $936.40K | 224,389 |
| Paul Caine Director | Sep 10, 2026 | Sale(10b5-1 plan) | −5,000 | $23.53 | $117.65K | 144,901 |
| Katie Seitz Evans See Remarks | Sep 9, 2026 | Sale(10b5-1 plan) | −11,100 | $23.46 | $260.41K | 455,797 |
| Katie Seitz Evans See Remarks | Sep 8, 2026 | Sale(10b5-1 plan) | −32,285 | $23.63 | $762.89K | 466,897 |
| Katie Seitz Evans See Remarks | Sep 8, 2026 | Option exercise | +13,546 | $5.16 | $69.90K | 499,182 |
| David Buonasera CHIEF TECHNOLOGY OFFICER | Sep 2, 2026 | Sale(10b5-1 plan) | −1,043 | $25.00 | $26.08K | 246,320 |
| David Buonasera CHIEF TECHNOLOGY OFFICER | Sep 1, 2026 | Sale(10b5-1 plan) | −5,371 | $23.42 | $125.79K | 247,363 |
| Sarah Patricia Harden Director | Aug 28, 2026 | Sale(10b5-1 plan) | −18,436 | $24.00 | $442.46K | 114,751 |
| Sarah Patricia Harden Director | Aug 26, 2026 | Sale(10b5-1 plan) | −30,550 | $23.31 | $712.12K | 133,187 |
| Sean Patrick Buckley See Remarks | Aug 18, 2026 | Sale(10b5-1 plan) | −2,759 | $25.00 | $68.98K | 293,060 |
| Sean Patrick Buckley See Remarks | Aug 17, 2026 | Sale(10b5-1 plan) | −8,271 | $24.31 | $201.07K | 295,819 |
| David Buonasera CHIEF TECHNOLOGY OFFICER | Aug 15, 2026 | Tax withholding | −8,102 | $24.73 | $200.36K | 252,734 |
| Sean Patrick Buckley See Remarks | Aug 15, 2026 | Tax withholding | −11,715 | $24.73 | $289.71K | 304,090 |
| Katie Seitz Evans See Remarks | Aug 15, 2026 | Tax withholding | −11,204 | $24.73 | $277.07K | 485,636 |
| Michael G. Barrett CEO, Director | Aug 15, 2026 | Tax withholding | −10,404 | $24.73 | $257.29K | 392,670 |
| David Day CHIEF FINANCIAL OFFICER | Aug 15, 2026 | Tax withholding | −14,170 | $24.73 | $350.42K | 452,861 |
| Brian Gephart CHIEF ACCOUNTING OFFICER | Aug 15, 2026 | Tax withholding | −3,789 | $24.73 | $93.70K | 102,328 |
| Aaron Saltz CHIEF LEGAL OFFICER | Aug 15, 2026 | Tax withholding | −5,627 | $24.73 | $139.16K | 264,389 |
| Paul Caine Director | Aug 14, 2026 | Sale(10b5-1 plan) | −7,500 | $25.00 | $187.50K | 149,901 |
| David Day CHIEF FINANCIAL OFFICER | Aug 13, 2026 | Gift | −26,258 | – | – | 467,031 |
| Brian Gephart CHIEF ACCOUNTING OFFICER | Aug 10, 2026 | Sale | −12,479 | $24.68 | $307.98K | 106,117 |
| Paul Caine Director | Aug 10, 2026 | Sale(10b5-1 plan) | −5,000 | $24.35 | $121.75K | 157,401 |
| Rachel Lam Director | Aug 10, 2026 | Sale | −10,000 | $24.16 | $241.60K | 230,620 |
| David Buonasera CHIEF TECHNOLOGY OFFICER | Aug 6, 2026 | Sale(10b5-1 plan) | −2,602 | $24.00 | $62.45K | 261,707 |
| David Buonasera CHIEF TECHNOLOGY OFFICER | Aug 6, 2026 | Sale(10b5-1 plan) | −4,176 | $22.81 | $95.25K | 264,309 |
| David Buonasera CHIEF TECHNOLOGY OFFICER | Aug 6, 2026 | Sale(10b5-1 plan) | −871 | $25.00 | $21.78K | 260,836 |
| Katie Seitz Evans See Remarks | Aug 6, 2026 | Sale(10b5-1 plan) | −20,000 | $24.00 | $480.00K | 496,840 |
| Katie Seitz Evans See Remarks | Aug 6, 2026 | Option exercise | +20,000 | $5.16 | $103.20K | 516,840 |
| Sean Patrick Buckley See Remarks | Aug 6, 2026 | Sale(10b5-1 plan) | −47,942 | $25.09 | $1.20M | 335,042 |
| Sean Patrick Buckley See Remarks | Aug 6, 2026 | Sale(10b5-1 plan) | −19,237 | $23.00 | $442.45K | 315,805 |
| Sean Patrick Buckley See Remarks | Aug 6, 2026 | Option exercise | +28,703 | $13.90 | $398.97K | 382,984 |
| Michael G. Barrett CEO, Director | Aug 6, 2026 | Option exercise | +293,968 | $5.80 | $1.71M | 697,042 |
| Michael G. Barrett CEO, Director | Aug 6, 2026 | Sale(10b5-1 plan) | −293,968 | $22.72 | $6.68M | 403,074 |
| Douglas S. Knopper Director | Aug 6, 2026 | Sale(10b5-1 plan) | −37,337 | $22.72 | $848.30K | 88,473 |
| Michael G. Barrett CEO, Director | Jul 15, 2026 | Sale(10b5-1 plan) | −38,596 | $20.35 | $785.43K | 403,074 |
| Michael G. Barrett CEO, Director | Jul 15, 2026 | Option exercise | +38,596 | $5.80 | $223.86K | 441,670 |
| Paul Caine Director | Jul 10, 2026 | Sale(10b5-1 plan) | −5,000 | $20.64 | $103.20K | 162,401 |
| David Buonasera CHIEF TECHNOLOGY OFFICER | Jul 7, 2026 | Sale(10b5-1 plan) | −1,224 | $21.00 | $25.70K | 268,485 |
| Sean Patrick Buckley See Remarks | Jul 7, 2026 | Sale(10b5-1 plan) | −19,233 | $21.03 | $404.47K | 354,281 |
| David Buonasera CHIEF TECHNOLOGY OFFICER | Jul 1, 2026 | Sale(10b5-1 plan) | −9,376 | $20.00 | $187.52K | 269,709 |
| Michael G. Barrett CEO, Director | Jun 29, 2026 | Sale(10b5-1 plan) | −75,000 | $19.50 | $1.46M | 403,074 |
| Michael G. Barrett CEO, Director | Jun 29, 2026 | Option exercise | +75,000 | $5.80 | $435.00K | 478,074 |
| Sean Patrick Buckley See Remarks | Jun 17, 2026 | Sale(10b5-1 plan) | −19,233 | $19.00 | $365.43K | 373,514 |
| David Buonasera CHIEF TECHNOLOGY OFFICER | Jun 17, 2026 | Sale(10b5-1 plan) | −1,409 | $19.00 | $26.77K | 279,085 |
| David Buonasera CHIEF TECHNOLOGY OFFICER | Jun 16, 2026 | Sale(10b5-1 plan) | −11,233 | $18.00 | $202.19K | 280,494 |
| Michael G. Barrett CEO, Director | Jun 16, 2026 | Option exercise | +100,000 | $5.80 | $580.00K | 503,074 |
| Michael G. Barrett CEO, Director | Jun 16, 2026 | Sale(10b5-1 plan) | −100,000 | $17.50 | $1.75M | 403,074 |
| Douglas S. Knopper Director | Jun 16, 2026 | Sale(10b5-1 plan) | −37,337 | $18.10 | $675.80K | 125,810 |
| David Buonasera CHIEF TECHNOLOGY OFFICER | Jun 15, 2026 | Sale(10b5-1 plan) | −1,057 | $17.00 | $17.97K | 291,727 |
| Michael G. Barrett CEO, Director | Jun 15, 2026 | Option exercise | +178,596 | $5.80 | $1.04M | 581,670 |
| Michael G. Barrett CEO, Director | Jun 15, 2026 | Sale(10b5-1 plan) | −178,596 | $16.59 | $2.96M | 403,074 |
| David T. Pearson Director | Jun 10, 2026 | Sale(10b5-1 plan) | −10,766 | $15.65 | $168.49K | 79,001 |
| Douglas S. Knopper Director | Jun 10, 2026 | Sale(10b5-1 plan) | −10,766 | $15.73 | $169.35K | 163,147 |
| Paul Caine Director | Jun 8, 2026 | Award | +13,798 | – | – | 167,401 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Caine Paul Director | Sep 17, 2026 | 20,000 | $475.60K | Sep 17, 2026 | Restricted Stock Units |
| S. Knopper & Abigail L. Knopper TTEES of the Knopper Joint Mgmt Trust 11/15/13 Douglas Director | Sep 17, 2026 | 37,337 | $887.87K | Sep 17, 2026 | Restricted Stock Units |
| Spillane Robert Director | Sep 14, 2026 | 10,363 | $246.24K | Sep 14, 2026 | Stock Option Exercise |
| Buonasera David Officer | Sep 14, 2026 | 1,165 | $27.69K | Sep 14, 2026 | Restricted Stock Units |
| Evans Katheryn Officer | Sep 11, 2026 | 13,997 | $335.93K | Sep 11, 2026 | Restricted Stock |
| Saltz Aaron Officer | Sep 10, 2026 | 60,000 | $1.41M | Sep 10, 2026 | Previously Exercised Stock Options |
| Caine Paul Director | Sep 10, 2026 | 10,000 | $235.80K | Sep 10, 2026 | Restricted Stock Units |
| Evans Katheryn Officer | Sep 9, 2026 | 11,100 | $260.36K | Sep 9, 2026 | Restricted Stock |
| Evans Katheryn Officer | Sep 8, 2026 | 32,285 | $762.87K | Sep 8, 2026 | Stock Option Exercise |
| Buonasera David Officer | Sep 2, 2026 | 1,043 | $26.08K | Sep 2, 2026 | Restricted Stock |
| Buonasera David Officer | Sep 1, 2026 | 5,371 | $125.79K | Sep 1, 2026 | Restricted Stock |
| Patricia Harden Sarah Director | Aug 28, 2026 | 18,436 | $442.46K | Aug 28, 2026 | Restricted Stock |
| Patricia Harden Sarah Director | Aug 26, 2026 | 30,550 | $712.17K | Aug 26, 2026 | Restricted Stock |
| Buckley Sean Officer | Aug 18, 2026 | 2,759 | $66.74K | Aug 18, 2026 | Restricted Stock Units |
| Buckley Sean Officer | Aug 17, 2026 | 8,271 | $204.54K | Aug 17, 2026 | Restricted Stock Units |