Magnite (MGNI)
Magnite on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as services-computer programming, data processing, etc..
10.5M
Short interest
settlement 2026-10-15
6.1
Days to cover
+2.0 days vs prior
15.9%
Short share of volume
2026-11-03
100
Fails to deliver
settlement 2026-09-30
Thu 5 Nov
Next earnings
estimated date
-$16.5M
Insider flow, 90 days
0 buys, 28 sells
As of 2026-11-03.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in MGNI is 10,507,955 shares, down 925,174 shares over the last month. Over the last 48 readings it ranged from 7,820,838 shares (15 November 2024) to 20,580,909 shares (30 June 2025). At the reported average volume of 1.7M shares a day that is 6.1 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 10,507,955 | -3.8% | 1,721,228 | 6.10 |
| 2026-09-30 | 10,926,829 | -4.4% | 2,678,118 | 4.08 |
| 2026-09-15 | 11,433,129 | +4.1% | 2,179,220 | 5.25 |
| 2026-08-31 | 10,978,762 | -1.8% | 1,947,871 | 5.64 |
| 2026-08-14 | 11,178,680 | -4.0% | 3,631,991 | 3.08 |
| 2026-07-31 | 11,638,779 | -14.5% | 2,093,457 | 5.56 |
| 2026-07-15 | 13,606,133 | -7.5% | 2,541,944 | 5.35 |
| 2026-06-30 | 14,712,876 | +9.6% | 4,082,869 | 3.60 |
| 2026-06-15 | 13,419,271 | +10.6% | 2,851,031 | 4.71 |
| 2026-05-29 | 12,137,723 | -0.7% | 2,285,307 | 5.31 |
| 2026-05-15 | 12,220,217 | +0.6% | 3,384,256 | 3.61 |
| 2026-04-30 | 12,144,807 | +7.1% | 2,027,845 | 5.99 |
| 2026-04-15 | 11,336,377 | +4.5% | 1,720,429 | 6.59 |
| 2026-03-31 | 10,847,278 | -1.0% | 2,053,012 | 5.28 |
| 2026-03-13 | 10,961,808 | -4.7% | 1,898,079 | 5.78 |
| 2026-02-27 | 11,500,688 | -10.9% | 2,595,240 | 4.43 |
| 2026-02-13 | 12,911,016 | -8.3% | 2,973,969 | 4.34 |
| 2026-01-30 | 14,077,922 | -7.8% | 2,028,191 | 6.94 |
| 2026-01-15 | 15,271,939 | +10.0% | 2,304,776 | 6.63 |
| 2025-12-31 | 13,885,617 | +3.8% | 1,810,160 | 7.67 |
| 2025-12-15 | 13,377,375 | +5.7% | 2,414,077 | 5.54 |
| 2025-11-28 | 12,654,687 | -19.0% | 2,695,572 | 4.69 |
| 2025-11-14 | 15,629,600 | +1.6% | 3,959,355 | 3.95 |
| 2025-10-31 | 15,385,183 | +10.6% | 2,261,637 | 6.80 |
| 2025-10-15 | 13,915,655 | -4.9% | 2,967,791 | 4.69 |
| 2025-09-30 | 14,629,003 | +1.2% | 3,311,341 | 4.42 |
| 2025-09-15 | 14,453,264 | -0.5% | 2,832,399 | 5.10 |
| 2025-08-29 | 14,531,502 | -2.9% | 3,155,065 | 4.61 |
| 2025-08-15 | 14,959,929 | -1.7% | 3,037,446 | 4.93 |
| 2025-07-31 | 15,224,374 | -19.6% | 2,511,479 | 6.06 |
| 2025-07-15 | 18,934,780 | -8.0% | 3,801,639 | 4.98 |
| 2025-06-30 | 20,580,909 | +5.6% | 3,084,627 | 6.67 |
| 2025-06-13 | 19,486,292 | +19.9% | 1,918,415 | 10.16 |
| 2025-05-30 | 16,251,264 | +1.3% | 1,774,770 | 9.16 |
| 2025-05-15 | 16,050,932 | -2.7% | 2,793,292 | 5.75 |
| 2025-04-30 | 16,496,213 | +17.2% | 2,890,887 | 5.71 |
| 2025-04-15 | 14,070,986 | +7.8% | 2,845,608 | 4.94 |
| 2025-03-31 | 13,058,138 | +7.3% | 2,348,037 | 5.56 |
| 2025-03-14 | 12,172,624 | +10.5% | 3,205,852 | 3.80 |
| 2025-02-28 | 11,017,582 | +5.7% | 2,794,973 | 3.94 |
| 2025-02-14 | 10,426,458 | +12.4% | 3,671,501 | 2.84 |
| 2025-01-31 | 9,275,413 | +5.7% | 1,725,991 | 5.37 |
| 2025-01-15 | 8,774,443 | +7.6% | 1,615,622 | 5.43 |
| 2024-12-31 | 8,151,638 | +2.4% | 1,421,574 | 5.73 |
| 2024-12-13 | 7,963,439 | -5.1% | 1,523,731 | 5.23 |
| 2024-11-29 | 8,392,381 | +7.3% | 1,880,075 | 4.46 |
| 2024-11-15 | 7,820,838 | -9.4% | 2,729,769 | 2.87 |
| 2024-10-31 | 8,631,944 | -2.4% | 1,493,292 | 5.78 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 3 November 2026, the short share of MGNI volume is 15.9%, down 8.5 points over the last five sessions. Over the last 30 readings it ranged from 15.9% (3 November 2026) to 62.3% (5 October 2026). The latest reading sits at the bottom of that range. The latest reading is 27.3 points below the 30-session average of 43.2%, on 2.0M shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-03 | 312K | 2.0M | 15.9% | 1 |
| 2026-11-02 | 941K | 1.8M | 51.4% | 35 |
| 2026-10-30 | 337K | 1.1M | 31.2% | 450 |
| 2026-10-29 | 243K | 752K | 32.4% | 56 |
| 2026-10-28 | 223K | 509K | 43.8% | 235 |
| 2026-10-27 | 171K | 699K | 24.4% | 164 |
| 2026-10-26 | 269K | 885K | 30.4% | 150 |
| 2026-10-23 | 161K | 291K | 55.3% | 92 |
| 2026-10-22 | 278K | 676K | 41.1% | 73 |
| 2026-10-21 | 135K | 444K | 30.3% | 158 |
| 2026-10-20 | 288K | 493K | 58.4% | 0 |
| 2026-10-19 | 134K | 358K | 37.4% | 579 |
| 2026-10-16 | 216K | 505K | 42.8% | 232 |
| 2026-10-15 | 368K | 651K | 56.6% | 51 |
| 2026-10-14 | 365K | 762K | 47.9% | 3,384 |
| 2026-10-13 | 279K | 550K | 50.7% | 148 |
| 2026-10-12 | 151K | 450K | 33.6% | 0 |
| 2026-10-09 | 268K | 531K | 50.4% | 101 |
| 2026-10-08 | 495K | 928K | 53.3% | 13,787 |
| 2026-10-07 | 320K | 746K | 42.9% | 303 |
| 2026-10-06 | 192K | 416K | 46.2% | 884 |
| 2026-10-05 | 294K | 473K | 62.3% | 0 |
| 2026-10-02 | 269K | 576K | 46.8% | 0 |
| 2026-10-01 | 227K | 549K | 41.4% | 100 |
| 2026-09-30 | 384K | 850K | 45.2% | 0 |
| 2026-09-29 | 776K | 1.8M | 44.2% | 2,953 |
| 2026-09-28 | 379K | 919K | 41.2% | 1,105 |
| 2026-09-25 | 266K | 521K | 51.2% | 114 |
| 2026-09-24 | 384K | 908K | 42.3% | 1,120 |
| 2026-09-23 | 352K | 805K | 43.7% | 179 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 30 September 2026, the fails-to-deliver balance in MGNI is 100 shares, down 19,388 shares over the last settlement date. Over the last 30 readings it ranged from 6 shares (9 July 2026) to 235,687 shares (11 September 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-30 | 100 | $25.67 | $3K |
| 2026-09-28 | 19,488 | $23.97 | $467K |
| 2026-09-25 | 14,888 | $24.07 | $358K |
| 2026-09-21 | 1,100 | $25.15 | $28K |
| 2026-09-18 | 2,165 | $25.63 | $55K |
| 2026-09-11 | 235,687 | $23.55 | $5.6M |
| 2026-09-02 | 10,119 | $22.89 | $232K |
| 2026-08-28 | 2,872 | $23.36 | $67K |
| 2026-08-27 | 29,296 | $23.38 | $685K |
| 2026-08-24 | 20,100 | $23.50 | $472K |
| 2026-08-21 | 18,775 | $23.35 | $438K |
| 2026-08-14 | 77,878 | $24.58 | $1.9M |
| 2026-08-12 | 622 | $24.30 | $15K |
| 2026-08-10 | 8,727 | $24.72 | $216K |
| 2026-08-07 | 768 | $24.32 | $19K |
| 2026-08-06 | 11,000 | $20.67 | $227K |
| 2026-07-27 | 36,549 | $18.51 | $677K |
| 2026-07-24 | 43,227 | $17.92 | $775K |
| 2026-07-23 | 100 | $18.30 | $2K |
| 2026-07-22 | 100 | $19.13 | $2K |
| 2026-07-21 | 19,062 | $18.97 | $362K |
| 2026-07-20 | 21,808 | $19.00 | $414K |
| 2026-07-09 | 6 | $20.31 | $122 |
| 2026-07-07 | 761 | $20.84 | $16K |
| 2026-07-06 | 5,843 | $20.38 | $119K |
| 2026-07-01 | 121 | $18.98 | $2K |
| 2026-06-29 | 125,694 | $18.73 | $2.4M |
| 2026-06-24 | 28,679 | $18.00 | $516K |
| 2026-06-22 | 30,847 | $17.89 | $552K |
| 2026-06-15 | 927 | $16.25 | $15K |
Insider trades
SEC Form 4, newest first. JSONInsiders at MGNI reported 28 open-market sells worth $16.5M in the last 90 days and no open-market buys. Latest filing: Caine Paul (Director) on 2026-10-12.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-10-12 | Caine Paul | Director | Sell | 13K | $25.29 | $316K | 125K |
| 2026-10-01 | Gephart Brian | CHIEF FINANCIAL OFFICER | Grant | 65K | $0.00 | $0 | 167K |
| 2026-10-01 | Sullivan Haas | CHIEF ACCOUNTING OFFICER | Grant | 25K | $0.00 | $0 | 98K |
| 2026-09-17 | Knopper Douglas S | Director | Sell | 37K | $26.28 | $981K | 51K |
| 2026-09-17 | Caine Paul | Director | Sell | 8K | $26.50 | $199K | 137K |
| 2026-09-14 | Spillane Robert F | Director | Sell | 10K | $23.76 | $246K | 58K |
| 2026-09-14 | Spillane Robert F | Director | Exercise or conversion | 10K | $5.17 | $54K | 68K |
| 2026-09-14 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 1K | $24.00 | $28K | 245K |
| 2026-09-11 | Evans Katie Seitz | See Remarks | Sell | 14K | $24.00 | $336K | 442K |
| 2026-09-10 | Saltz Aaron | CHIEF LEGAL OFFICER | Sell | 40K | $23.41 | $936K | 224K |
| 2026-09-10 | Caine Paul | Director | Sell | 5K | $23.53 | $118K | 145K |
| 2026-09-09 | Evans Katie Seitz | See Remarks | Sell | 11K | $23.46 | $260K | 456K |
| 2026-09-08 | Evans Katie Seitz | See Remarks | Sell | 32K | $23.63 | $763K | 467K |
| 2026-09-08 | Evans Katie Seitz | See Remarks | Exercise or conversion | 14K | $5.16 | $70K | 499K |
| 2026-09-02 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 1K | $25.00 | $26K | 246K |
| 2026-09-01 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 5K | $23.42 | $126K | 247K |
| 2026-08-28 | Harden Sarah Patricia | Director | Sell | 18K | $24.00 | $442K | 115K |
| 2026-08-26 | Harden Sarah Patricia | Director | Sell | 31K | $23.31 | $712K | 133K |
| 2026-08-18 | Buckley Sean Patrick | See Remarks | Sell | 3K | $25.00 | $69K | 293K |
| 2026-08-17 | Buckley Sean Patrick | See Remarks | Sell | 8K | $24.31 | $201K | 296K |
| 2026-08-15 | Saltz Aaron | CHIEF LEGAL OFFICER | Tax withholding | 6K | $24.73 | $139K | 264K |
| 2026-08-15 | Gephart Brian | CHIEF ACCOUNTING OFFICER | Tax withholding | 4K | $24.73 | $94K | 102K |
| 2026-08-15 | Evans Katie Seitz | See Remarks | Tax withholding | 11K | $24.73 | $277K | 486K |
| 2026-08-15 | Day David | CHIEF FINANCIAL OFFICER | Tax withholding | 14K | $24.73 | $350K | 453K |
| 2026-08-15 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Tax withholding | 8K | $24.73 | $200K | 253K |
| 2026-08-15 | Buckley Sean Patrick | See Remarks | Tax withholding | 12K | $24.73 | $290K | 304K |
| 2026-08-15 | BARRETT MICHAEL G. | CEO | Tax withholding | 10K | $24.73 | $257K | 393K |
| 2026-08-14 | Caine Paul | Director | Sell | 8K | $25.00 | $188K | 150K |
| 2026-08-13 | Day David | CHIEF FINANCIAL OFFICER | Gift | 26K | $0.00 | $0 | 467K |
| 2026-08-10 | Lam Rachel | Director | Sell | 10K | $24.16 | $242K | 231K |
| 2026-08-10 | Gephart Brian | CHIEF ACCOUNTING OFFICER | Sell | 12K | $24.68 | $308K | 106K |
| 2026-08-10 | Caine Paul | Director | Sell | 5K | $24.35 | $122K | 157K |
| 2026-08-06 | Knopper Douglas S | Director | Sell | 37K | $22.72 | $848K | 88K |
| 2026-08-06 | Evans Katie Seitz | See Remarks | Sell | 20K | $24.00 | $480K | 497K |
| 2026-08-06 | Evans Katie Seitz | See Remarks | Exercise or conversion | 20K | $5.16 | $103K | 517K |
| 2026-08-06 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 871 | $25.00 | $22K | 261K |
| 2026-08-06 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 3K | $24.00 | $62K | 262K |
| 2026-08-06 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 4K | $22.81 | $95K | 264K |
| 2026-08-06 | Buckley Sean Patrick | See Remarks | Sell | 19K | $23.00 | $442K | 316K |
| 2026-08-06 | Buckley Sean Patrick | See Remarks | Sell | 48K | $25.09 | $1.2M | 335K |
| 2026-08-06 | Buckley Sean Patrick | See Remarks | Exercise or conversion | 29K | $13.90 | $399K | 383K |
| 2026-08-06 | BARRETT MICHAEL G. | CEO | Sell | 294K | $22.72 | $6.7M | 403K |
| 2026-08-06 | BARRETT MICHAEL G. | CEO | Exercise or conversion | 294K | $5.80 | $1.7M | 697K |
| 2026-07-15 | BARRETT MICHAEL G. | CEO | Sell | 39K | $20.35 | $785K | 403K |
| 2026-07-15 | BARRETT MICHAEL G. | CEO | Exercise or conversion | 39K | $5.80 | $224K | 442K |
| 2026-07-10 | Caine Paul | Director | Sell | 5K | $20.64 | $103K | 162K |
| 2026-07-07 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 1K | $21.00 | $26K | 268K |
| 2026-07-07 | Buckley Sean Patrick | See Remarks | Sell | 19K | $21.03 | $404K | 354K |
| 2026-07-01 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 9K | $20.00 | $188K | 270K |
| 2026-06-29 | BARRETT MICHAEL G. | CEO | Sell | 75K | $19.50 | $1.5M | 403K |
| 2026-06-29 | BARRETT MICHAEL G. | CEO | Exercise or conversion | 75K | $5.80 | $435K | 478K |
| 2026-06-17 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 1K | $19.00 | $27K | 279K |
| 2026-06-17 | Buckley Sean Patrick | See Remarks | Sell | 19K | $19.00 | $365K | 374K |
| 2026-06-16 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 11K | $18.00 | $202K | 280K |
| 2026-06-16 | Knopper Douglas S | Director | Sell | 37K | $18.10 | $676K | 126K |
| 2026-06-16 | BARRETT MICHAEL G. | CEO | Sell | 100K | $17.50 | $1.8M | 403K |
| 2026-06-16 | BARRETT MICHAEL G. | CEO | Exercise or conversion | 100K | $5.80 | $580K | 503K |
| 2026-06-15 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 1K | $17.00 | $18K | 292K |
| 2026-06-15 | BARRETT MICHAEL G. | CEO | Sell | 179K | $16.59 | $3.0M | 403K |
| 2026-06-15 | BARRETT MICHAEL G. | CEO | Exercise or conversion | 179K | $5.80 | $1.0M | 582K |
| 2026-06-10 | PEARSON DAVID T. | Director | Sell | 11K | $15.65 | $168K | 79K |
| 2026-06-10 | Knopper Douglas S | Director | Sell | 11K | $15.73 | $169K | 163K |
| 2026-06-08 | Yu Diane | Director | Grant | 14K | $0.00 | $0 | 81K |
| 2026-06-08 | Spillane Robert F | Director | Grant | 14K | $0.00 | $0 | 58K |
| 2026-06-08 | Rossman James | Director | Grant | 14K | $0.00 | $0 | 107K |
| 2026-06-08 | PEARSON DAVID T. | Director | Grant | 14K | $0.00 | $0 | 90K |
| 2026-06-08 | Lam Rachel | Director | Grant | 14K | $0.00 | $0 | 241K |
| 2026-06-08 | Knopper Douglas S | Director | Grant | 14K | $0.00 | $0 | 174K |
| 2026-06-08 | Harden Sarah Patricia | Director | Grant | 14K | $0.00 | $0 | 164K |
| 2026-06-08 | Caine Paul | Director | Grant | 14K | $0.00 | $0 | 167K |
| 2026-06-01 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Sell | 1K | $15.00 | $21K | 293K |
| 2026-05-19 | Spillane Robert F | Director | Sell | 10K | $13.33 | $133K | 44K |
| 2026-05-15 | Saltz Aaron | CHIEF LEGAL OFFICER | Tax withholding | 6K | $12.82 | $72K | 270K |
| 2026-05-15 | Gephart Brian | CHIEF ACCOUNTING OFFICER | Tax withholding | 4K | $12.82 | $49K | 119K |
| 2026-05-15 | Evans Katie Seitz | President, Operations | Tax withholding | 11K | $12.82 | $144K | 497K |
| 2026-05-15 | Day David | CHIEF FINANCIAL OFFICER | Tax withholding | 14K | $12.82 | $182K | 493K |
| 2026-05-15 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Tax withholding | 8K | $12.82 | $107K | 294K |
| 2026-05-15 | Buckley Sean Patrick | President, Revenue | Tax withholding | 12K | $12.82 | $154K | 393K |
| 2026-05-15 | BARRETT MICHAEL G. | CEO | Tax withholding | 10K | $12.82 | $133K | 403K |
| 2026-02-18 | Soroca Adam Lee | CHIEF PRODUCT OFFICER | Sell | 22K | $12.00 | $258K | 388K |
| 2026-02-15 | Saltz Aaron | CHIEF LEGAL OFFICER | Tax withholding | 13K | $11.70 | $149K | 276K |
| 2026-02-15 | Soroca Adam Lee | CHIEF PRODUCT OFFICER | Tax withholding | 19K | $11.70 | $222K | 410K |
| 2026-02-15 | Gephart Brian | CHIEF ACCOUNTING OFFICER | Tax withholding | 6K | $11.70 | $72K | 122K |
| 2026-02-15 | Evans Katie Seitz | President, Operations | Tax withholding | 27K | $11.70 | $321K | 508K |
| 2026-02-15 | Day David | CHIEF FINANCIAL OFFICER | Tax withholding | 31K | $11.70 | $358K | 507K |
| 2026-02-15 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Tax withholding | 17K | $11.70 | $201K | 302K |
| 2026-02-15 | Buckley Sean Patrick | President, Revenue | Tax withholding | 27K | $11.70 | $315K | 403K |
| 2026-02-15 | BARRETT MICHAEL G. | CEO | Tax withholding | 24K | $11.70 | $276K | 412K |
| 2026-01-09 | Saltz Aaron | CHIEF LEGAL OFFICER | Tax withholding | 15K | $16.17 | $243K | 288K |
| 2026-01-09 | Saltz Aaron | CHIEF LEGAL OFFICER | Exercise or conversion | 28K | $0.00 | $0 | 303K |
| 2026-01-09 | Soroca Adam Lee | CHIEF PRODUCT OFFICER | Tax withholding | 25K | $16.17 | $410K | 429K |
| 2026-01-09 | Soroca Adam Lee | CHIEF PRODUCT OFFICER | Exercise or conversion | 51K | $0.00 | $0 | 454K |
| 2026-01-09 | Evans Katie Seitz | President, Operations | Tax withholding | 27K | $16.17 | $434K | 535K |
| 2026-01-09 | Evans Katie Seitz | President, Operations | Exercise or conversion | 51K | $0.00 | $0 | 562K |
| 2026-01-09 | Day David | CHIEF FINANCIAL OFFICER | Tax withholding | 35K | $16.17 | $569K | 538K |
| 2026-01-09 | Day David | CHIEF FINANCIAL OFFICER | Exercise or conversion | 73K | $0.00 | $0 | 573K |
| 2026-01-09 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Tax withholding | 12K | $16.17 | $199K | 319K |
| 2026-01-09 | Buonasera David | CHIEF TECHNOLOGY OFFICER | Exercise or conversion | 23K | $0.00 | $0 | 332K |
| 2026-01-09 | Buckley Sean Patrick | President, Revenue | Tax withholding | 30K | $16.17 | $491K | 430K |
| 2026-01-09 | Buckley Sean Patrick | President, Revenue | Exercise or conversion | 64K | $0.00 | $0 | 460K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON50 Form 144 notices on file for MGNI worth $27.8M at the prices reported; 24 in the last 90 days worth $16.3M. Latest: Douglas S. Knopper & Abigail L. Knopper TTEES of the Knopper Joint Mgmt Trust 11/15/13 filed on 2026-09-17 to sell 37,337 shares ($888K) from 2026-09-17.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-09-17 | Douglas S. Knopper & Abigail L. Knopper TTEES of the Knopper Joint Mgmt Trust 11/15/13Director | 37K | $888K | 0.026% | 2026-09-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-17 | PAUL CAINEDirector | 20K | $476K | 0.014% | 2026-09-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-14 | ROBERT SPILLANEDirector | 10K | $246K | 0.007% | 2026-09-14 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-14 | DAVID BUONASERAOfficer | 1K | $28K | 0.001% | 2026-09-14 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-11 | KATHERYN EVANSOfficer | 14K | $336K | 0.010% | 2026-09-11 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-10 | AARON SALTZOfficer | 60K | $1.4M | 0.042% | 2026-09-10 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-10 | PAUL CAINEDirector | 10K | $236K | 0.007% | 2026-09-10 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-09 | KATHERYN EVANSOfficer | 11K | $260K | 0.008% | 2026-09-09 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-08 | KATHERYN EVANSOfficer | 32K | $763K | 0.023% | 2026-09-08 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-02 | DAVID BUONASERAOfficer | 1K | $26K | 0.001% | 2026-09-02 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-01 | DAVID BUONASERAOfficer | 5K | $126K | 0.004% | 2026-09-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-28 | SARAH PATRICIA HARDENDirector | 18K | $442K | 0.013% | 2026-08-28 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-26 | SARAH PATRICIA HARDENDirector | 31K | $712K | 0.021% | 2026-08-26 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-18 | SEAN BUCKLEYOfficer | 3K | $67K | 0.002% | 2026-08-18 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-17 | SEAN BUCKLEYOfficer | 8K | $205K | 0.006% | 2026-08-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-14 | PAUL CAINEDirector | 3K | $61K | 0.002% | 2026-08-14 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-10 | RACHEL LAMDirector | 10K | $242K | 0.007% | 2026-08-10 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-10 | BRIAN GEPHARTOfficer | 12K | $308K | 0.009% | 2026-08-10 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-06 | DOUGLAS KNOPPERDirector | 19K | $395K | 0.013% | 2026-08-06 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-06 | Douglas S. Knopper & Abigail L. Knopper TTEES of the Knopper Joint Mgmt Trust 11/15/13Director | 18K | $376K | 0.013% | 2026-08-06 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-06 | KATHERYN EVANSOfficer | 20K | $480K | 0.014% | 2026-08-06 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-06 | DAVID BUONASERAOfficer | 8K | $179K | 0.005% | 2026-08-06 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-06 | SEAN BUCKLEYOfficer | 67K | $1.4M | 0.047% | 2026-08-06 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-06 | MICHAEL G BARRETTOfficer, Director | 294K | $6.7M | 0.205% | 2026-08-06 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-15 | MICHAEL G BARRETTOfficer, Director | 39K | $786K | 0.027% | 2026-07-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-10 | PAUL CAINEDirector | 15K | $318K | 0.010% | 2026-07-10 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-07 | ADAM L SOROCAFormer Officer | 8K | $168K | 0.006% | 2026-07-07 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-07 | DAVID BUONASERAOfficer | 1K | $26K | 0.001% | 2026-07-07 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-07 | SEAN BUCKLEYOfficer | 19K | $401K | 0.013% | 2026-07-07 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-01 | ADAM L SOROCAFormer Officer | 8K | $160K | 0.006% | 2026-07-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-01 | DAVID BUONASERAOfficer | 9K | $188K | 0.007% | 2026-07-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-29 | MICHAEL G BARRETTOfficer, Director | 75K | $1.5M | 0.052% | 2026-06-29 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-17 | ADAM L SOROCAFormer Officer | 8K | $152K | 0.006% | 2026-06-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-17 | DAVID BUONASERAOfficer | 1K | $27K | 0.001% | 2026-06-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-17 | SEAN BUCKLEYOfficer | 19K | $357K | 0.013% | 2026-06-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-16 | ADAM L SOROCAFormer Officer | 6K | $108K | 0.004% | 2026-06-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-16 | DOUGLAS KNOPPERDirector | 37K | $625K | 0.026% | 2026-06-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-16 | DAVID BUONASERAOfficer | 11K | $202K | 0.008% | 2026-06-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-16 | MICHAEL G BARRETTOfficer, Director | 100K | $1.8M | 0.070% | 2026-06-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-15 | ADAM L SOROCAFormer Officer | 6K | $102K | 0.004% | 2026-06-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-15 | DAVID BUONASERAOfficer | 1K | $18K | 0.001% | 2026-06-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-15 | MICHAEL G BARRETTOfficer, Director | 179K | $3.0M | 0.125% | 2026-06-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-11 | ADAM L SOROCAFormer Officer | 7K | $104K | 0.005% | 2026-06-11 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-10 | DAVID T PEARSONDirector | 11K | $169K | 0.008% | 2026-06-10 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-10 | DOUGLAS KNOPPERDirector | 11K | $170K | 0.008% | 2026-06-10 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-09 | ADAM L SOROCAFormer Officer | 7K | $105K | 0.005% | 2026-06-09 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-03 | ADAM L SOROCAFormer Officer | 7K | $101K | 0.005% | 2026-06-03 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-01 | ADAM L SOROCAFormer Officer | 28K | $418K | 0.019% | 2026-06-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-01 | DAVID BUONASERAOfficer | 1K | $21K | 0.001% | 2026-06-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-28 | ADAM L SOROCAFormer Officer | 43K | $603K | 0.030% | 2026-05-28 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON5 holders report 5% or more of MGNI in their latest filing, all on Schedule 13G (passive). The largest reported stake is Vanguard Portfolio Management at 5.4% of the class (7,849,870 shares), filed 2026-04-29 for an event on 2026-03-31.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-13 | 13G/Ano. 1 | Wellington Management Group LLPparent holding company | 6.0M | 4.2% | 2026-06-30 |
| 2026-08-13 | 13G/Ano. 1 | Wellington Group Holdings LLPparent holding company | 6.0M | 4.2% | 2026-06-30 |
| 2026-08-13 | 13G/Ano. 1 | Wellington Investment Advisors Holdings LLPparent holding company | 6.0M | 4.2% | 2026-06-30 |
| 2026-08-06 | 13G | FMR LLCparent holding company | 7.8M | 5.4% | 2026-06-30 |
| 2026-08-06 | 13G | Abigail P. Johnsonindividual | 7.8M | 5.4% | 2026-06-30 |
| 2026-05-14 | 13G/Ano. 1 | Capital Research Global Investorsinvestment adviser | 5.0M | 3.5% | 2026-03-31 |
| 2026-04-30 | 13G | Vanguard Capital Managementinvestment adviser | 7.3M | 5.0% | 2026-03-31 |
| 2026-04-29 | 13G | Vanguard Portfolio Managementinvestment adviser | 7.8M | 5.4% | 2026-03-31 |
| 2026-03-27 | 13G/Ano. 4 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-02-10 | 13G | Wellington Management Company LLPinvestment adviser | 8.6M | 5.2% | 2025-12-31 |
13F holders
Tracked managers holding MGNI at their latest 13F. JSON5 of the 30 tracked managers held MGNI at their latest 13F, $28.3M in total at quarter-end prices. Millennium Management is the largest at $14.5M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 3 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Millennium Management | 2026-06-30 | 765K | $14.5M | 0.01% | -470K |
| Citadel Advisors | 2026-06-30 | 473K | $9.0M | 0.00% | -580K |
| AQR Capital Management | 2026-06-30 | 177K | $3.4M | 0.00% | +55K |
| Two Sigma Investments | 2026-06-30 | 43K | $810K | 0.00% | -352K |
| D. E. Shaw & Co. | 2026-06-30 | 36K | $678K | 0.00% | new |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
Financials
SEC XBRL, as filed. JSONIn Q2 FY 2026 (quarter ended 2026-06-30) Magnite reported revenue of $192.8M, up 11.2% from the same quarter a year earlier, and net income of $19.4M (0.13 diluted EPS). In FY 2025 it generated $236.2M of operating cash flow and spent $46.3M on buybacks. As of 2026-06-30, cash was $332.6M against $350.4M of debt.
- Cash
- $332.6M
- Debt
- $350.4M
- Equity
- $936.3M
- Total assets
- $3.03B
- Shares outstanding
- 143,424,157
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q2 FY 2026 | 2026-06-30 | $192.8M | $19.4M | 10.0% | 0.13 |
| Q1 FY 2026 | 2026-03-31 | $164.4M | $4.4M | 2.7% | 0.03 |
| Q4 FY 2025derived | 2025-12-31 | $205.4M | $123.0M | 59.9% | n/a |
| Q3 FY 2025 | 2025-09-30 | $179.5M | $20.1M | 11.2% | 0.13 |
| Q2 FY 2025 | 2025-06-30 | $173.3M | $11.1M | 6.4% | 0.08 |
| Q1 FY 2025 | 2025-03-31 | $155.8M | -$9.6M | -6.2% | -0.07 |
| Q4 FY 2024derived | 2024-12-31 | $194.0M | $36.4M | 18.8% | n/a |
| Q3 FY 2024 | 2024-09-30 | $162.0M | $5.2M | 3.2% | 0.04 |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2025 | 2025-12-31 | $714.0M | $144.6M | $236.2M | $70.5M | $46.3M | n/a |
| FY 2024 | 2024-12-31 | $668.2M | $22.8M | $235.2M | $32.8M | $14.6M | n/a |
| FY 2023 | 2023-12-31 | $619.7M | -$159.2M | $214.4M | $26.8M | $0 | n/a |
| FY 2022 | 2022-12-31 | $577.1M | -$130.3M | $192.6M | $30.8M | $15.7M | n/a |
| FY 2021 | 2021-12-31 | $468.4M | $65K | $126.6M | $17.7M | $6.0M | n/a |
Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-07-29 from the cover page.
What this page is
Magnite in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Magnite (MGNI), SEC CIK 1595974, listed on Nasdaq, classified by the SEC as services-computer programming, data processing, etc.. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-03.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-30.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-09-17.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-08-13.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Financials
- SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-05.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-10-12.JSON and CSV
- Company record
- EDGAR filing index for CIK 1595974Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
Other companies the SEC classifies as services-computer programming, data processing, etc.
Other company pages
Datasets
Frequently Asked Questions
How much of MGNI is sold short?
10,507,955 shares were held short at the 2026-10-15 settlement, 6.1 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is MGNI's daily short volume?
On 2026-11-03, 312,015 of the 1,961,790 MGNI shares reported to FINRA were sold short, 15.9% of the day's reported volume. Short volume is a flow for one day, not a position.
Does MGNI have fails to deliver?
The SEC's latest file shows 100 MGNI shares failed to deliver at settlement 2026-09-30. Fails are reported per settlement date and published twice a month with a lag.
Are MGNI insiders buying or selling?
Insiders at MGNI reported 28 open-market sells worth $16.5M in the last 90 days and no open-market buys. Latest filing: Caine Paul (Director) on 2026-10-12.
Have MGNI insiders filed to sell?
50 Form 144 notices on file for MGNI worth $27.8M at the prices reported; 24 in the last 90 days worth $16.3M. Latest: Douglas S. Knopper & Abigail L. Knopper TTEES of the Knopper Joint Mgmt Trust 11/15/13 filed on 2026-09-17 to sell 37,337 shares ($888K) from 2026-09-17.
Who owns 5% or more of MGNI?
5 holders report 5% or more of MGNI in their latest filing, all on Schedule 13G (passive). The largest reported stake is Vanguard Portfolio Management at 5.4% of the class (7,849,870 shares), filed 2026-04-29 for an event on 2026-03-31.
What did MGNI report last quarter?
In Q2 FY 2026 (quarter ended 2026-06-30) Magnite reported revenue of $192.8M, up 11.2% from the same quarter a year earlier, and net income of $19.4M (0.13 diluted EPS). In FY 2025 it generated $236.2M of operating cash flow and spent $46.3M on buybacks. As of 2026-06-30, cash was $332.6M against $350.4M of debt.
Which tracked 13F managers own MGNI?
5 of the 30 tracked 13F managers held MGNI shares at their latest filing, $28.3M in all. The largest: Izzy Englander's Millennium Management (765K shares, $14.5M), Ken Griffin's Citadel Advisors (473K shares, $9.0M), Cliff Asness's AQR Capital Management (177K shares, $3.4M), Two Sigma Investments (43K shares, $810K), D. E. Shaw & Co. (36K shares, $678K).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.