M-tron Industries (MPTI)
M-tron Industries on one page: short interest, daily short volume, fails to deliver, large holders, 13F holders, earnings dates and insider trades. Listed on NYSE, classified by the SEC as electronic components, nec.
415K
Short interest
settlement 2026-10-15
5.3
Days to cover
+0.2 days vs prior
78.8%
Short share of volume
2026-10-28
1
Fails to deliver
settlement 2026-09-30
Wed 11 Nov
Next earnings
estimated date
-$104K
Insider flow, 90 days
0 buys, 1 sells
As of 2026-10-28.
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 MPTI is 414,934 shares, up 34,345 shares over the last month. Over the last 48 readings it ranged from 11,250 shares (14 March 2025) to 430,047 shares (15 April 2026). The latest reading sits at the top of that range. At the reported average volume of 78K shares a day that is 5.3 days to cover.
Embed this chart.The embed keeps its attribution line.
<iframe src="https://xoomar.com/embed/stocks/mpti" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 414,934 | -0.2% | 78,440 | 5.29 |
| 2026-09-30 | 415,769 | +9.2% | 82,076 | 5.07 |
| 2026-09-15 | 380,589 | +12.2% | 84,596 | 4.50 |
| 2026-08-31 | 339,216 | +4.8% | 96,615 | 3.51 |
| 2026-08-14 | 323,512 | +12.8% | 192,114 | 1.68 |
| 2026-07-31 | 286,825 | +17.8% | 358,790 | 1.00 |
| 2026-07-15 | 243,549 | +5.4% | 211,683 | 1.15 |
| 2026-06-30 | 231,055 | +52.0% | 210,794 | 1.10 |
| 2026-06-15 | 151,966 | -6.3% | 117,186 | 1.30 |
| 2026-05-29 | 162,149 | -6.8% | 63,580 | 2.55 |
| 2026-05-15 | 174,069 | -3.2% | 78,162 | 2.23 |
| 2026-04-30 | 179,880 | -58.2% | 83,126 | 2.16 |
| 2026-04-15 | 430,047 | +34.2% | 82,074 | 5.24 |
| 2026-03-31 | 320,365 | +266.6% | 155,360 | 2.06 |
| 2026-03-13 | 87,399 | +15.6% | 33,334 | 2.62 |
| 2026-02-27 | 75,631 | -19.4% | 30,002 | 2.52 |
| 2026-02-13 | 93,808 | +6.6% | 29,026 | 3.23 |
| 2026-01-30 | 88,009 | +0.9% | 28,569 | 3.08 |
| 2026-01-15 | 87,180 | -18.4% | 60,472 | 1.44 |
| 2025-12-31 | 106,828 | -42.7% | 31,285 | 3.41 |
| 2025-12-15 | 186,366 | +70.5% | 35,543 | 5.24 |
| 2025-11-28 | 109,282 | -13.5% | 39,727 | 2.75 |
| 2025-11-14 | 126,281 | +3.2% | 27,264 | 4.63 |
| 2025-10-31 | 122,323 | +16.8% | 27,357 | 4.47 |
| 2025-10-15 | 104,756 | -6.1% | 22,574 | 4.64 |
| 2025-09-30 | 111,558 | -9.5% | 31,660 | 3.52 |
| 2025-09-15 | 123,253 | -16.5% | 27,048 | 4.56 |
| 2025-08-29 | 147,570 | -4.4% | 33,376 | 4.42 |
| 2025-08-15 | 154,427 | +8.5% | 52,766 | 2.93 |
| 2025-07-31 | 142,292 | +16.2% | 54,083 | 2.63 |
| 2025-07-15 | 122,446 | +14.7% | 49,458 | 2.48 |
| 2025-06-30 | 106,797 | +509.0% | 131,977 | 1.00 |
| 2025-06-13 | 17,536 | -16.5% | 36,814 | 1.00 |
| 2025-05-30 | 21,010 | -19.3% | 37,750 | 1.00 |
| 2025-05-15 | 26,040 | -5.6% | 47,032 | 1.00 |
| 2025-04-30 | 27,587 | -17.4% | 38,968 | 1.00 |
| 2025-04-15 | 33,408 | +28.1% | 72,323 | 1.00 |
| 2025-03-31 | 26,073 | +131.8% | 71,083 | 1.00 |
| 2025-03-14 | 11,250 | -80.5% | 42,266 | 1.00 |
| 2025-02-28 | 57,613 | +42.0% | 96,208 | 1.00 |
| 2025-02-14 | 40,564 | -1.3% | 22,673 | 1.79 |
| 2025-01-31 | 41,112 | -11.2% | 30,472 | 1.35 |
| 2025-01-15 | 46,273 | -12.2% | 46,846 | 1.00 |
| 2024-12-31 | 52,693 | -18.6% | 37,655 | 1.40 |
| 2024-12-13 | 64,745 | +0.3% | 60,315 | 1.07 |
| 2024-11-29 | 64,550 | -9.5% | 55,811 | 1.16 |
| 2024-11-15 | 71,342 | +0.4% | 41,675 | 1.71 |
| 2024-10-31 | 71,079 | -7.5% | 26,293 | 2.70 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 28 October 2026, the short share of MPTI volume is 78.8%, down 2.5 points over the last five sessions. Over the last 30 readings it ranged from 40.8% (9 October 2026) to 84.9% (26 October 2026). The latest reading is 11.8 points above the 30-session average of 67.0%, on 23K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-28 | 18K | 23K | 78.8% | 0 |
| 2026-10-27 | 12K | 14K | 82.1% | 0 |
| 2026-10-26 | 18K | 21K | 84.9% | 0 |
| 2026-10-23 | 15K | 20K | 78.2% | 283 |
| 2026-10-22 | 11K | 14K | 75.4% | 0 |
| 2026-10-21 | 15K | 18K | 81.3% | 0 |
| 2026-10-20 | 22K | 30K | 72.3% | 0 |
| 2026-10-19 | 24K | 29K | 84.2% | 0 |
| 2026-10-16 | 11K | 16K | 71.9% | 0 |
| 2026-10-15 | 18K | 31K | 57.2% | 0 |
| 2026-10-14 | 30K | 47K | 64.5% | 0 |
| 2026-10-13 | 16K | 27K | 60.3% | 0 |
| 2026-10-12 | 18K | 21K | 84.8% | 0 |
| 2026-10-09 | 9K | 21K | 40.8% | 0 |
| 2026-10-08 | 5K | 12K | 43.1% | 0 |
| 2026-10-07 | 14K | 20K | 68.5% | 0 |
| 2026-10-06 | 11K | 14K | 76.4% | 0 |
| 2026-10-05 | 10K | 15K | 67.7% | 10 |
| 2026-10-02 | 5K | 12K | 45.5% | 0 |
| 2026-10-01 | 15K | 31K | 49.9% | 0 |
| 2026-09-30 | 35K | 49K | 72.0% | 0 |
| 2026-09-29 | 9K | 12K | 79.3% | 0 |
| 2026-09-28 | 16K | 24K | 67.0% | 0 |
| 2026-09-25 | 15K | 26K | 58.7% | 0 |
| 2026-09-24 | 13K | 19K | 71.1% | 0 |
| 2026-09-23 | 17K | 24K | 68.8% | 0 |
| 2026-09-22 | 19K | 28K | 65.5% | 0 |
| 2026-09-21 | 11K | 18K | 64.2% | 0 |
| 2026-09-18 | 9K | 20K | 46.3% | 0 |
| 2026-09-17 | 15K | 30K | 49.6% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 30 September 2026, the fails-to-deliver balance in MPTI is 1 share, down 102 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (30 June 2026) to 14,759 shares (26 March 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-30 | 1 | $76.09 | $76 |
| 2026-09-17 | 103 | $76.10 | $8K |
| 2026-08-12 | 698 | $85.62 | $60K |
| 2026-08-04 | 2 | $83.57 | $167 |
| 2026-07-27 | 59 | $83.58 | $5K |
| 2026-07-06 | 31 | $91.02 | $3K |
| 2026-06-30 | 1 | $99.06 | $99 |
| 2026-05-11 | 2,091 | $81.20 | $170K |
| 2026-05-05 | 123 | $71.09 | $9K |
| 2026-05-01 | 1,367 | $66.78 | $91K |
| 2026-04-29 | 277 | $63.37 | $18K |
| 2026-04-28 | 838 | $62.24 | $52K |
| 2026-04-24 | 451 | $61.27 | $28K |
| 2026-04-21 | 207 | $65.83 | $14K |
| 2026-04-17 | 23 | $65.62 | $2K |
| 2026-04-16 | 5,149 | $66.00 | $340K |
| 2026-04-07 | 43 | $66.83 | $3K |
| 2026-04-01 | 351 | $66.85 | $23K |
| 2026-03-31 | 441 | $66.19 | $29K |
| 2026-03-27 | 100 | $72.15 | $7K |
| 2026-03-26 | 14,759 | $77.06 | $1.1M |
| 2026-03-16 | 200 | $64.85 | $13K |
| 2026-02-11 | 100 | $62.49 | $6K |
| 2026-02-10 | 200 | $65.07 | $13K |
| 2026-02-09 | 100 | $64.38 | $6K |
| 2026-02-06 | 957 | $62.88 | $60K |
| 2026-02-05 | 1,010 | $62.41 | $63K |
| 2026-02-04 | 53 | $65.76 | $3K |
| 2026-01-12 | 1,034 | $64.75 | $67K |
| 2026-01-07 | 482 | $58.37 | $28K |
Insider trades
SEC Form 4, newest first. JSONInsiders at MPTI reported 1 open-market sell worth $104K in the last 90 days and no open-market buys. Latest filing: Biles Linda M (Executive VP - Finance) on 2026-08-11.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-08-11 | Biles Linda M | Executive VP - Finance | Sell | 1K | $85.05 | $104K | 29K |
| 2026-05-04 | Pforr Cameron | CEO and CFO | Sell | 840 | $66.78 | $56K | 27K |
| 2026-05-04 | Drafts William Arnold | President | Sell | 361 | $66.78 | $24K | 14K |
| 2026-05-04 | Biles Linda M | Executive VP - Finance | Sell | 306 | $66.78 | $20K | 28K |
| 2026-04-29 | Pforr Cameron | CEO and CFO | Exercise or conversion | 220 | $40.32 | $9K | 28K |
| 2026-04-28 | Pforr Cameron | CEO and CFO | Exercise or conversion | 220 | $40.32 | $9K | 28K |
| 2026-04-27 | Arteaga Ivan | Director | Exercise (in or at the money) | 24 | $59.00 | $1K | 1K |
| 2026-04-20 | Susanto Hendi | Director | Exercise (in or at the money) | 1K | $59.00 | $63K | 9K |
| 2026-04-20 | GABELLI MARC | Director | Exercise (in or at the money) | 3K | $59.00 | $193K | 46K |
| 2026-04-14 | Biles Linda M | Executive VP - Finance | Sell | 720 | $0.00 | $0 | 29K |
| 2026-04-14 | Susanto Hendi | Director | Exercise (in or at the money) | 454 | $59.00 | $27K | 8K |
| 2026-04-10 | Arteaga Ivan | Director | Exercise (in or at the money) | 174 | $59.00 | $10K | 1K |
| 2026-04-07 | Pforr Cameron | CEO and CFO | Exercise (in or at the money) | 100 | $59.00 | $6K | 28K |
| 2026-04-02 | Pforr Cameron | CEO and CFO | Grant | 6K | $0.00 | $0 | 28K |
| 2026-04-02 | Drafts William Arnold | President | Grant | 2K | $0.00 | $0 | 14K |
| 2026-04-02 | Biles Linda M | Executive VP - Finance | Grant | 2K | $0.00 | $0 | 29K |
| 2026-03-19 | Pforr Cameron | CEO and CFO | Grant | 4K | $0.00 | $0 | 31K |
| 2026-03-19 | Drafts William Arnold | President | Grant | 3K | $0.00 | $0 | 17K |
| 2026-03-19 | Biles Linda M | Executive VP - Finance | Grant | 2K | $0.00 | $0 | 30K |
| 2026-03-19 | Susanto Hendi | Director | Grant | 242 | $0.00 | $0 | 8K |
| 2026-03-19 | Mega John S | Director | Grant | 242 | $0.00 | $0 | 6K |
| 2026-03-19 | LaPenta Robert V Jr | Director | Grant | 242 | $0.00 | $0 | 5K |
| 2026-03-19 | LAZAR BEL | Director | Grant | 242 | $0.00 | $0 | 7K |
| 2026-03-19 | Goldman David M | Director | Grant | 242 | $0.00 | $0 | 3K |
| 2026-03-19 | GABELLI MARC | Director | Grant | 242 | $0.00 | $0 | 43K |
| 2026-03-19 | Arteaga Ivan | Director | Grant | 242 | $0.00 | $0 | 1K |
| 2026-01-06 | Arteaga Ivan | Director | Exercise (in or at the money) | 35 | $47.50 | $2K | 873 |
| 2025-12-23 | Drafts William Arnold | President | Exercise (in or at the money) | 540 | $47.50 | $26K | 12K |
| 2025-12-23 | Susanto Hendi | Director | Exercise (in or at the money) | 892 | $47.50 | $42K | 7K |
| 2025-12-23 | Goldman David M | Director | Exercise (in or at the money) | 325 | $47.50 | $15K | 2K |
| 2025-12-22 | Pforr Cameron | CEO and CFO | Exercise (in or at the money) | 2K | $47.50 | $95K | 22K |
| 2025-12-19 | Drafts William Arnold | President | Exercise (in or at the money) | 201 | $47.50 | $10K | 11K |
| 2025-12-19 | Arteaga Ivan | Director | Exercise (in or at the money) | 72 | $47.50 | $3K | 838 |
| 2025-12-18 | LAZAR BEL | Director | Exercise (in or at the money) | 1K | $47.50 | $48K | 7K |
| 2025-12-04 | LaPenta Robert V Jr | Director | Exercise (in or at the money) | 306 | $47.50 | $15K | 4K |
| 2025-08-11 | Biles Linda M | Executive VP - Finance | Tax withholding | 617 | $0.00 | $0 | 27K |
| 2025-06-27 | Drafts William Arnold | President | Buy | 1K | $40.50 | $41K | 11K |
| 2025-05-28 | LaPenta Robert V Jr | Director | Gift | 750 | $0.00 | $0 | 4K |
| 2025-03-21 | Arteaga Ivan | Director | Grant | 402 | $0.00 | $0 | 766 |
| 2025-03-21 | LaPenta Robert V Jr | Director | Grant | 402 | $0.00 | $0 | 5K |
| 2025-03-21 | LAZAR BEL | Director | Grant | 402 | $0.00 | $0 | 6K |
| 2025-03-21 | Mega John S | Director | Grant | 402 | $0.00 | $0 | 5K |
| 2025-03-21 | Susanto Hendi | Director | Grant | 402 | $0.00 | $0 | 6K |
| 2025-03-21 | Goldman David M | Director | Grant | 402 | $0.00 | $0 | 2K |
| 2025-03-21 | GABELLI MARC | Director | Grant | 402 | $0.00 | $0 | 42K |
| 2024-11-19 | GABELLI MARIO J | TenPercentOwner | Gift | 4K | $0.00 | $0 | 110K |
| 2024-11-18 | GABELLI MARIO J | TenPercentOwner | Gift | 4K | $0.00 | $0 | 114K |
| 2024-11-15 | GABELLI MARIO J | TenPercentOwner | Gift | 9K | $0.00 | $0 | 118K |
| 2024-11-14 | GABELLI MARIO J | TenPercentOwner | Sell | 8K | $60.11 | $451K | 126K |
| 2024-11-13 | GABELLI MARIO J | TenPercentOwner | Sell | 2K | $52.58 | $79K | 134K |
| 2024-11-08 | GABELLI MARIO J | TenPercentOwner | Gift | 19K | $0.00 | $0 | 135K |
| 2024-11-07 | GABELLI MARIO J | TenPercentOwner | Gift | 4K | $0.00 | $0 | 155K |
| 2024-11-06 | GABELLI MARIO J | TenPercentOwner | Gift | 4K | $0.00 | $0 | 159K |
| 2024-10-14 | Arteaga Ivan | Director | Sell | 2K | $50.67 | $81K | 364 |
| 2024-10-11 | Arteaga Ivan | Director | Sell | 400 | $49.41 | $20K | 2K |
| 2024-10-10 | GABELLI MARIO J | TenPercentOwner | Gift | 4K | $0.00 | $0 | 163K |
| 2024-10-03 | Pforr Cameron | Chief Financial Officer | Grant | 20K | $0.00 | $0 | 20K |
| 2024-09-30 | GABELLI MARIO J | TenPercentOwner | Gift | 4K | $0.00 | $0 | 167K |
| 2024-09-30 | GABELLI MARIO J | TenPercentOwner | Sell | 171 | $41.60 | $7K | 167K |
| 2024-09-13 | GABELLI MARIO J | TenPercentOwner | Gift | 3K | $0.00 | $0 | 171K |
| 2024-09-09 | GABELLI MARIO J | TenPercentOwner | Sell | 800 | $33.49 | $27K | 171K |
| 2024-08-28 | GABELLI MARIO J | TenPercentOwner | Gift | 3K | $0.00 | $0 | 174K |
| 2024-08-26 | GABELLI MARIO J | TenPercentOwner | Gift | 3K | $0.00 | $0 | 172K |
| 2024-08-19 | GABELLI MARIO J | TenPercentOwner | Gift | 3K | $0.00 | $0 | 175K |
| 2024-06-25 | GABELLI MARIO J | TenPercentOwner | Sell | 200 | $33.38 | $7K | 178K |
| 2024-06-24 | GABELLI MARIO J | TenPercentOwner | Sell | 700 | $31.85 | $22K | 178K |
| 2024-06-13 | GABELLI MARIO J | TenPercentOwner | Gift | 2K | $0.00 | $0 | 179K |
| 2024-06-13 | GABELLI MARIO J | TenPercentOwner | Sell | 500 | $35.70 | $18K | 177K |
| 2024-06-10 | GABELLI MARIO J | TenPercentOwner | Gift | 7K | $0.00 | $0 | 177K |
| 2024-05-28 | GABELLI MARIO J | TenPercentOwner | Gift | 2K | $0.00 | $0 | 181K |
| 2024-04-19 | Biles Linda M | EVP Finance | Grant | 10K | $23.90 | $239K | 28K |
| 2024-04-09 | GABELLI MARIO J | TenPercentOwner | Sell | 500 | $26.55 | $13K | 184K |
| 2024-04-08 | GABELLI MARIO J | TenPercentOwner | Gift | 8K | $0.00 | $0 | 182K |
| 2024-03-21 | GABELLI MARC | Director | Grant | 364 | $41.24 | $15K | 42K |
| 2024-03-21 | Arteaga Ivan | Director | Grant | 364 | $0.00 | $0 | 2K |
| 2024-03-21 | Goldman David M | Director | Grant | 364 | $0.00 | $0 | 2K |
| 2024-03-21 | LaPenta Robert V Jr | Director | Grant | 364 | $0.00 | $0 | 4K |
| 2024-03-21 | LAZAR BEL | Director | Grant | 364 | $0.00 | $0 | 5K |
| 2024-03-21 | Mega John S | Director | Grant | 364 | $0.00 | $0 | 5K |
| 2024-03-21 | Susanto Hendi | Director | Grant | 364 | $0.00 | $0 | 6K |
| 2024-03-18 | GABELLI MARIO J | TenPercentOwner | Gift | 5K | $0.00 | $0 | 185K |
| 2024-03-13 | GABELLI MARIO J | TenPercentOwner | Gift | 4K | $0.00 | $0 | 190K |
| 2024-03-04 | GABELLI MARIO J | TenPercentOwner | Gift | 5K | $0.00 | $0 | 193K |
| 2024-02-20 | GABELLI MARIO J | TenPercentOwner | Gift | 6K | $0.00 | $0 | 190K |
| 2024-01-10 | Drafts William Arnold | President | Sell | 5K | $40.50 | $191K | 10K |
| 2024-01-10 | EMG MADONNA EDUCATIONAL FOUNDATION INC. | Director,Other | Sell | 29K | $39.99 | $1.2M | 40K |
| 2024-01-09 | Drafts William Arnold | President | Sell | 5K | $40.00 | $200K | 15K |
| 2024-01-05 | EMG MADONNA EDUCATIONAL FOUNDATION INC. | Director,Other | Sell | 27K | $34.85 | $954K | 69K |
| 2024-01-04 | GABELLI MARIO J | TenPercentOwner | Gift | 2K | $0.00 | $0 | 196K |
| 2024-01-04 | GABELLI MARC | Director | Sell | 38K | $37.86 | $1.4M | 0 |
| 2024-01-03 | GABELLI MARIO J | TenPercentOwner | Gift | 2K | $0.00 | $0 | 198K |
| 2024-01-03 | GABELLI MARC | Director | Sell | 44K | $39.39 | $1.7M | 97K |
| 2024-01-03 | Drafts William Arnold | President | Exercise (in or at the money) | 10K | $13.10 | $127K | 20K |
| 2023-12-29 | Biles Linda M | V.P. Controller | Returned to company | 2K | $35.70 | $55K | 18K |
| 2023-12-28 | GABELLI MARIO J | TenPercentOwner | Gift | 5K | $0.00 | $0 | 198K |
| 2023-12-22 | EMG MADONNA EDUCATIONAL FOUNDATION INC. | Director,TenPercentOwner | Sell | 10K | $33.89 | $339K | 141K |
| 2023-12-22 | GABELLI MARIO J | TenPercentOwner | Gift | 8K | $0.00 | $0 | 200K |
| 2023-12-21 | GABELLI MARC | Director | Sell | 2K | $33.35 | $77K | 38K |
| 2023-12-15 | EMG MADONNA EDUCATIONAL FOUNDATION INC. | Director,TenPercentOwner | Sell | 931 | $27.87 | $26K | 151K |
| 2023-12-14 | GABELLI MARC | TenPercentOwner | Sell | 25K | $27.67 | $699K | 152K |
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.
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON3 holders report 5% or more of MPTI in their latest filing, all on Schedule 13G (passive). The largest reported stake is T. Rowe Price Investment Management, Inc. at 5.9% of the class (255,506 shares), filed 2026-08-14 for an event on 2026-06-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-10-23 | 13G | ROYCE & ASSOCIATES LPinvestment adviser | 230K | 5.3% | 2026-09-30 |
| 2026-08-14 | 13G | T. Rowe Price Investment Management, Inc.investment adviser | 256K | 5.9% | 2026-06-30 |
| 2026-08-03 | 13G/Ano. 1 | BANK OF AMERICA CORP /DE/parent holding company | 20K | 0.5% | 2026-06-30 |
| 2026-07-29 | 13G/Ano. 1 | BlackRock, Inc.parent holding company | 251K | 5.8% | 2026-06-30 |
| 2026-03-27 | 13D/Ano. 10 | GGCP, INC.corporation, parent holding company | 168K | 4.7% | 2026-03-26 |
| 2026-03-27 | 13D/Ano. 10 | GABELLI MARIO Jindividual | 37K | 1.0% | 2026-03-26 |
| 2026-03-27 | 13D/Ano. 10 | GAMCO INVESTORS, INC. ET ALcorporation, parent holding company | 0 | 0.0% | 2026-03-26 |
| 2026-03-27 | 13D/Ano. 10 | Associated Capital Group, Inc.corporation, parent holding company | 0 | 0.0% | 2026-03-26 |
13F holders
Tracked managers holding MPTI at their latest 13F. JSON5 of the 30 tracked managers held MPTI at their latest 13F, $28.7M in total at quarter-end prices. Two Sigma Investments is the largest at $13.1M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 2 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Two Sigma Investments | 2026-06-30 | 132K | $13.1M | 0.01% | +70K |
| Renaissance Technologies | 2026-06-30 | 96K | $9.5M | 0.01% | -784 |
| D. E. Shaw & Co. | 2026-06-30 | 48K | $4.8M | 0.00% | +43K |
| Citadel Advisors | 2026-06-30 | 9K | $912K | 0.00% | -14K |
| AQR Capital Management | 2026-06-30 | 4K | $369K | 0.00% | +608 |
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.
What this page is
M-tron Industries 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 M-tron Industries (MPTI), SEC CIK 1902314, listed on NYSE, classified by the SEC as electronic components, nec. 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 2026-10-28.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
- 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 2026-10-23.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
- 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 2026-08-12.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 2026-08-11.JSON and CSV
- Company record
- EDGAR filing index for CIK 1902314Ticker, 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.
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Datasets
Frequently Asked Questions
How much of MPTI is sold short?
414,934 shares were held short at the 2026-10-15 settlement, 5.3 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 MPTI's daily short volume?
On 2026-10-28, 17,780 of the 22,564 MPTI shares reported to FINRA were sold short, 78.8% of the day's reported volume. Short volume is a flow for one day, not a position.
Does MPTI have fails to deliver?
The SEC's latest file shows 1 MPTI shares failed to deliver at settlement 2026-09-30. Fails are reported per settlement date and published twice a month with a lag.
Are MPTI insiders buying or selling?
Insiders at MPTI reported 1 open-market sell worth $104K in the last 90 days and no open-market buys. Latest filing: Biles Linda M (Executive VP - Finance) on 2026-08-11.
Who owns 5% or more of MPTI?
3 holders report 5% or more of MPTI in their latest filing, all on Schedule 13G (passive). The largest reported stake is T. Rowe Price Investment Management, Inc. at 5.9% of the class (255,506 shares), filed 2026-08-14 for an event on 2026-06-30.
Which tracked 13F managers own MPTI?
5 of the 30 tracked 13F managers held MPTI shares at their latest filing, $28.7M in all. The largest: Two Sigma Investments (132K shares, $13.1M), Renaissance Technologies (96K shares, $9.5M), D. E. Shaw & Co. (48K shares, $4.8M), Ken Griffin's Citadel Advisors (9K shares, $912K), Cliff Asness's AQR Capital Management (4K shares, $369K).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.