Radiotelephone Communications
Standard Industrial Classification: SIC 4812
Industry Insider Sentiment Analysis
The Radiotelephone Communications sector (SIC 4812) acts as a critical barometer for broader economic health. Our real-time monitoring reveals 1256 total transactions. Monitoring "cluster buying" is one of the most reliable leading indicators for future sector performance. By analyzing aggregate data across this specific Standard Industrial Classification, investors can filter out individual company volatility and identify high-conviction trends. When multiple directors and officers within the same industry move capital simultaneously, it often signals an upcoming sector-wide revaluation or a fundamental shift in supply chain dynamics that has yet to be recognized by the broader public market.
| Filing Date | Trade Date | Ticker | Company | Reporting Person | Relationship | Type | Price | Qty | Total, $ | Owned After |
|---|---|---|---|---|---|---|---|---|---|---|
| 2026-02-20 00:50 | 2026-02-18 | TMUS | T-Mobile US, Inc. | Osvaldik Peter | Officer | SELL | $214.86 | 27,000 | $5,801,220 | 51,573 |
| 2026-02-19 01:32 | 2026-02-17 | TMUS | T-Mobile US, Inc. | Nelson Mark Wolfe | Officer | SELL | $220.38 | 16,514 | $3,639,327 | 68,006 |
| 2026-02-18 01:10 | 2026-02-12 | TMUS | T-Mobile US, Inc. | CLAURE RAUL MARCELO | Director | SELL | $217.57 | 550,000 | $119,663,500 | 891,204 |
| 2025-12-10 01:40 | 2025-12-05 | TMUS | T-Mobile US, Inc. | Long Letitia A | Director | SELL | $210.32 | 1,457 | $306,436 | 5,438 |
| 2025-11-20 00:49 | 2025-11-17 | TMUS | T-Mobile US, Inc. | SIEVERT G MICHAEL | Director | SELL | $215.61 | 45,000 | $9,702,450 | 286,196 |
| 2025-11-20 00:47 | 2025-11-17 | TMUS | T-Mobile US, Inc. | Katz Michael J. | Officer | SELL | $215.91 | 2,500 | $539,775 | 156,203 |
| 2025-11-11 00:33 | 2025-11-06 | TMUS | T-Mobile US, Inc. | Gopalan Srini | Director, Officer | BUY | $201.82 | 9,800 | $1,977,836 | 90,258 |
| 2025-10-31 23:05 | 2025-10-29 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $220.46 | 1,374 | $302,911 | 582,065,875 |
| 2025-10-29 23:05 | 2025-10-27 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $220.72 | 117,933 | $26,030,608 | 582,067,249 |
| 2025-10-27 23:04 | 2025-10-23 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $221.12 | 35,577 | $7,866,665 | 582,185,182 |
| 2025-10-23 23:05 | 2025-10-21 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $227.72 | 128,852 | $29,341,907 | 582,220,759 |
| 2025-10-21 23:02 | 2025-10-17 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $228.71 | 128,852 | $29,469,805 | 627,524,343 |
| 2025-10-17 23:05 | 2025-10-15 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $227.38 | 128,852 | $29,298,973 | 627,653,195 |
| 2025-10-15 02:31 | 2025-10-10 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $227.87 | 193,278 | $44,042,934 | 627,782,047 |
| 2025-10-10 23:05 | 2025-10-08 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $226.60 | 128,852 | $29,197,928 | 627,975,325 |
| 2025-10-08 23:05 | 2025-10-06 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $225.95 | 128,852 | $29,114,625 | 628,104,177 |
| 2025-10-06 23:05 | 2025-10-02 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $229.81 | 128,852 | $29,611,478 | 628,233,029 |
| 2025-10-02 23:05 | 2025-09-30 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $236.98 | 128,852 | $30,535,424 | 634,048,214 |
| 2025-09-30 23:05 | 2025-09-26 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $238.12 | 128,841 | $30,679,116 | 634,177,066 |
| 2025-09-26 23:05 | 2025-09-24 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $238.68 | 128,852 | $30,754,382 | 634,305,918 |
| 2025-09-24 23:05 | 2025-09-22 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $238.08 | 128,852 | $30,677,097 | 634,434,770 |
| 2025-09-22 15:12 | 2025-09-17 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $239.01 | 193,278 | $46,195,162 | 634,563,622 |
| 2025-09-17 23:05 | 2025-09-15 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $239.15 | 128,878 | $30,821,161 | 634,756,900 |
| 2025-09-15 23:05 | 2025-09-11 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $241.25 | 128,852 | $31,085,042 | 634,885,752 |
| 2025-09-11 01:54 | 2025-09-09 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $241.26 | 139,680 | $33,699,756 | 635,014,604 |
| 2025-09-09 02:18 | 2025-09-04 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $249.83 | 209,520 | $52,343,397 | 635,154,284 |
| 2025-09-05 23:30 | 2025-09-04 | SPOK | Spok Holdings, Inc | Stein Todd J | Director | SELL | $18.08 | 38,008 | $687,359 | 42,726 |
| 2025-09-04 23:30 | 2025-09-02 | SPOK | Spok Holdings, Inc | Stein Todd J | Director | SELL | $18.03 | 66,046 | $1,190,908 | 42,726 |
| 2025-09-04 22:18 | 2025-09-02 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $254.50 | 139,680 | $35,548,001 | 635,363,804 |
| 2025-08-30 01:35 | 2025-08-28 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $250.88 | 139,680 | $35,042,430 | 635,503,484 |
| 2025-08-28 23:52 | 2025-08-26 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $251.01 | 139,680 | $35,061,258 | 635,643,164 |
| 2025-08-26 23:30 | 2025-08-22 | SPOK | Spok Holdings, Inc | Stein Todd J | Director | SELL | $17.98 | 20,644 | $371,134 | 42,726 |
| 2025-08-26 23:30 | 2025-08-25 | SPOK | Spok Holdings, Inc | WALLACE MICHAEL W | Officer | SELL | $17.87 | 10,806 | $193,118 | 40,369 |
| 2025-08-26 02:55 | 2025-08-21 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $254.75 | 209,520 | $53,375,618 | 635,782,844 |
| 2025-08-22 23:30 | 2025-08-21 | SPOK | Spok Holdings, Inc | KELLY VINCENT D | Director, Officer | SELL | $17.69 | 25,000 | $442,175 | 102,817 |
| 2025-08-22 23:30 | 2025-08-20 | SPOK | Spok Holdings, Inc | Stein Todd J | Director | SELL | $18.10 | 13,208 | $239,053 | 42,726 |
| 2025-08-21 00:23 | 2025-08-18 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $257.52 | 209,520 | $53,955,947 | 635,992,364 |
| 2025-08-20 23:35 | 2025-08-18 | TMUS | T-Mobile US, Inc. | SIEVERT G MICHAEL | Director, Officer | SELL | $256.38 | 45,000 | $11,536,875 | 336,222 |
| 2025-08-20 23:30 | 2025-08-18 | SPOK | Spok Holdings, Inc | Stein Todd J | Director | SELL | $18.37 | 28,366 | $521,047 | 42,726 |
| 2025-08-20 00:01 | 2025-08-15 | TMUS | T-Mobile US, Inc. | Katz Michael J. | Officer | SELL | $251.12 | 2,500 | $627,800 | 158,703 |
| 2025-08-19 00:36 | 2025-08-18 | USM | ARRAY DIGITAL INFRASTRUCTURE, INC. | HARCZAK HARRY J JR | Director | SELL | $76.20 | 1,960 | $149,357 | 19,374 |
| 2025-08-18 23:30 | 2025-08-14 | SPOK | Spok Holdings, Inc | Stein Todd J | Director | SELL | $18.48 | 96,586 | $1,784,620 | 42,726 |
| 2025-08-16 04:44 | 2025-08-13 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $252.21 | 209,520 | $52,842,893 | 636,201,884 |
| 2025-08-14 23:30 | 2025-08-12 | SPOK | Spok Holdings, Inc | Stein Todd J | Director | SELL | $18.46 | 73,365 | $1,354,333 | 42,726 |
| 2025-08-14 23:11 | 2025-08-12 | USM | ARRAY DIGITAL INFRASTRUCTURE, INC. | Chambers Douglas W | Director, Officer | SELL | $75.77 | 93,300 | $7,069,341 | 17,600 |
| 2025-08-13 02:55 | 2025-08-08 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $247.95 | 209,520 | $51,949,855 | 636,411,404 |
| 2025-08-08 02:48 | 2025-08-06 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $240.47 | 139,680 | $33,589,073 | 646,054,524 |
| 2025-08-06 23:30 | 2025-08-04 | SPOK | Spok Holdings, Inc | Stein Todd J | Director | SELL | $18.63 | 74,520 | $1,388,345 | 42,726 |
| 2025-08-06 23:30 | 2025-08-05 | SPOK | Spok Holdings, Inc | Rice Calvin | Officer | SELL | $18.28 | 14,736 | $269,389 | 7,035 |
| 2025-08-06 01:11 | 2025-08-01 | TMUS | T-Mobile US, Inc. | DEUTSCHE TELEKOM AG | Director, 10% owner | SELL | $238.53 | 209,520 | $49,976,156 | 646,194,204 |
Sector-Wide Insider Alpha
Analyzing insider movements across the Radiotelephone Communications sector provides a macro-view of executive conviction. When multiple leaders in different companies within the same SIC code (4812) simultaneously buy shares, it often indicates an industry-wide undervaluation or a positive shift in market cycles.
SEC Filings in Radiotelephone Communications
Every transaction in the Radiotelephone Communications industry is reported via Form 4 disclosures. By filtering these filings by industry, investors can detect institutional-scale sentiment shifts before they are reflected in broader market indices, following the capital flow of those with intimate industry knowledge.
UNDERSTANDING THE DATA
FILING DATE: The date and time when the transaction was reported to the SEC. This is when the public first receives the information.
TRADE DATE: The actual day the insider executed the purchase or sale in the market.
INDUSTRY: The specific market sector the company operates in. Useful for identifying broader institutional capital flows across sectors.
OWNED AFTER: The total number of shares held by the insider following the transaction. This highlights the insider's remaining conviction in the company.
CHANGE %: The percentage increase or decrease of the insider's total position. Large percentage changes often carry more weight than the dollar amount alone.
TRADE TYPES DEFINITIONS
BUY: An open market purchase. Typically indicates an insider's belief that the stock is undervalued or poised for growth.
SELL: An open market sale. While often used for diversification or liquidity, large or unexpected sales can be a warning signal.
OPT+S (OPTION EXERCISE & SALE): This occurs when an insider exercises their stock options and sells them immediately. Often part of a structured compensation plan.