Services-Medical Laboratories
Standard Industrial Classification: SIC 8071
Industry Insider Sentiment Analysis
The Services-Medical Laboratories sector (SIC 8071) acts as a critical barometer for broader economic health. Our real-time monitoring reveals 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2026-08-06 20:05 | 2026-08-04 | CDNA | CareDx, Inc. | Goldberg Michael | Director | SELL | $47.06 | 44,700 | $2,103,497 | 61,738 |
| 2026-08-06 21:06 | 2026-08-05 | GH | Guardant Health, Inc. | Hidalgo Medina Manuel | Director | OPT+S | $164.24 | 1,700 | $279,202 | 4,556 |
| 2026-08-06 20:14 | 2026-08-04 | CSTL | CASTLE BIOSCIENCES INC | MAETZOLD DEREK J | Director, Officer | OPT+S | $31.07 | 39,016 | $1,212,231 | 19,607 |
| 2026-08-06 20:14 | 2025-11-24 | CSTL | CASTLE BIOSCIENCES INC | Juvenal Tobin W | Officer | SELL | $38.39 | 1,301 | $49,945 | 77,694 |
| 2026-08-06 20:18 | 2026-08-05 | FTRE | Fortrea Holdings Inc. | Thakral Anshul | Director, Officer | OPT+S | $19.16 | 99,869 | $1,913,111 | 316,797 |
| 2026-08-06 20:05 | 2026-08-05 | CDNA | CareDx, Inc. | Novack Jeffrey Adam | Officer | SELL | $46.26 | 2,688 | $124,350 | 106,075 |
| 2026-08-06 20:10 | 2026-08-04 | CDNA | CareDx, Inc. | COURNOYER CHRISTINE | Director | SELL | $46.94 | 16,000 | $750,973 | 42,943 |
| 2026-08-06 20:10 | 2026-08-05 | CDNA | CareDx, Inc. | Bickerstaff George | Director | SELL | $46.29 | 20,000 | $925,700 | 134,061 |
| 2026-08-06 12:26 | 2026-08-04 | LH | LABCORP HOLDINGS INC. | Summy Amy B. | Officer | SELL | $306.74 | 924 | $283,428 | 6,956 |
| 2026-08-05 20:04 | 2026-08-03 | FTRE | Fortrea Holdings Inc. | SANDERS MACHELLE | Director | SELL | $18.01 | 9,700 | $174,697 | 36,399 |
| 2026-08-06 01:35 | 2026-08-03 | NTRA | Natera, Inc. | Sheena Jonathan | Director | SELL | $267.99 | 109 | $29,211 | 245,614 |
| 2026-08-06 01:35 | 2026-08-03 | NTRA | Natera, Inc. | Rabinowitz Matthew | Director, Officer | SELL | $267.99 | 731 | $195,900 | 2,275,394 |
| 2026-08-06 01:35 | 2026-08-03 | NTRA | Natera, Inc. | RABINOWITZ DANIEL | Officer | SELL | $267.99 | 334 | $89,508 | 170,073 |
| 2026-08-06 01:35 | 2026-08-03 | NTRA | Natera, Inc. | Moshkevich Solomon | Officer | SELL | $265.58 | 3,410 | $905,627 | 129,019 |
| 2026-08-06 01:35 | 2026-08-03 | NTRA | Natera, Inc. | Fesko John | Officer | SELL | $267.99 | 295 | $79,057 | 183,774 |
| 2026-08-06 01:35 | 2026-08-03 | NTRA | Natera, Inc. | Chapman Steven Leonard | Director, Officer | SELL | $266.40 | 3,076 | $819,431 | 99,897 |
| 2026-08-06 01:35 | 2026-08-03 | NTRA | Natera, Inc. | Brophy Michael Burkes | Officer | SELL | $271.74 | 795 | $216,030 | 51,637 |
| 2026-08-06 00:52 | 2026-08-03 | BLLN | BillionToOne, Inc. | Atay Oguzhan | Director, Officer | OPT+S | $137.07 | 45,000 | $6,167,961 | 162,500 |
| 2026-08-05 21:05 | 2026-08-04 | GH | Guardant Health, Inc. | CLARK IAN T | Director | OPT+S | $158.92 | 14,180 | $2,253,450 | 2,975 |
| 2026-08-05 20:18 | 2026-08-03 | CSTL | CASTLE BIOSCIENCES INC | Oelschlager Kristen M | Officer | SELL | $29.77 | 8,586 | $255,622 | 13,288 |
| 2026-08-05 15:17 | 2026-08-03 | LH | LABCORP HOLDINGS INC. | Wilkinson Peter J | Officer | OPT+S | $309.23 | 1,420 | $439,107 | 1,770 |
| 2026-08-04 20:32 | 2026-07-31 | BLLN | BillionToOne, Inc. | Sakakibara Shan Riku | Officer | SELL | $140.21 | 4,000 | $560,840 | 200,000 |
| 2026-08-04 20:35 | 2026-07-31 | CSTL | CASTLE BIOSCIENCES INC | MAETZOLD DEREK J | Director, Officer | OPT+S | $30.28 | 28,646 | $867,452 | 27,009 |
| 2026-08-04 20:36 | 2026-07-31 | CSTL | CASTLE BIOSCIENCES INC | Juvenal Tobin W | Officer | SELL | $29.21 | 19,040 | $556,174 | 78,995 |
| 2026-07-30 01:35 | 2026-07-27 | NTRA | Natera, Inc. | Brophy Michael Burkes | Officer | SELL | $253.28 | 5,064 | $1,282,634 | 52,432 |
| 2026-07-30 01:35 | 2026-07-27 | NTRA | Natera, Inc. | Chapman Steven Leonard | Director, Officer | SELL | $256.51 | 5,770 | $1,480,047 | 102,973 |
| 2026-07-30 01:35 | 2026-07-27 | NTRA | Natera, Inc. | Fesko John | Officer | SELL | $257.00 | 1,713 | $440,243 | 184,069 |
| 2026-07-30 01:35 | 2026-07-27 | NTRA | Natera, Inc. | Moshkevich Solomon | Officer | SELL | $257.00 | 2,214 | $568,997 | 132,429 |
| 2026-07-30 01:35 | 2026-07-27 | NTRA | Natera, Inc. | RABINOWITZ DANIEL | Officer | SELL | $257.08 | 1,887 | $485,107 | 170,407 |
| 2026-07-30 01:35 | 2026-07-27 | NTRA | Natera, Inc. | Rabinowitz Matthew | Director, Officer | SELL | $260.49 | 1,718 | $447,523 | 2,276,125 |
| 2026-07-30 01:35 | 2026-07-27 | NTRA | Natera, Inc. | Sheena Jonathan | Director | SELL | $257.93 | 479 | $123,549 | 245,723 |
| 2026-07-29 21:04 | 2026-07-28 | DGX | QUEST DIAGNOSTICS INC | DELANEY MARK E | Officer | SELL | $235.18 | 1,600 | $376,288 | 10,335 |
| 2026-07-29 20:09 | 2026-07-27 | CSTL | CASTLE BIOSCIENCES INC | MAETZOLD DEREK J | Director, Officer | OPT+S | $24.16 | 9,836 | $237,682 | 11,812 |
| 2026-07-20 23:38 | 2026-07-16 | BLLN | BillionToOne, Inc. | Johnson Nancy JoAnn | Officer | SELL | $128.29 | 14,199 | $1,821,628 | 6,900 |
| 2026-07-18 01:05 | 2026-07-15 | NTRA | Natera, Inc. | Chapman Rowan E | Director | SELL | $274.82 | 135 | $37,101 | 4,663 |
| 2026-07-18 01:05 | 2026-07-15 | NTRA | Natera, Inc. | Sheena Jonathan | Director | SELL | $273.88 | 1,500 | $410,825 | 18,032 |
| 2026-07-17 20:22 | 2026-07-16 | CDNA | CareDx, Inc. | Valantine Hannah | Director | OPT+S | $36.15 | 28,779 | $1,040,243 | 36,686 |
| 2026-07-17 20:23 | 2026-07-16 | CDNA | CareDx, Inc. | Hanna John Walter JR | Director, Officer | OPT+S | $37.79 | 118,000 | $4,458,642 | 653,448 |
| 2026-07-16 21:42 | 2026-07-14 | CELC | Celcuity Inc. | BAKER BROS. ADVISORS LP | SELL | $102.50 | 3,100,000 | $317,750,000 | 4,372,852 | |
| 2026-07-16 20:56 | 2026-07-16 | GH | Guardant Health, Inc. | Tariq Musa | Director | OPT+S | $163.29 | 116 | $18,942 | 11,182 |
| 2026-07-16 20:16 | 2026-07-14 | CSTL | CASTLE BIOSCIENCES INC | MAETZOLD DEREK J | Director, Officer | OPT+S | $22.92 | 4,172 | $95,622 | 12,090 |
| 2026-07-16 01:27 | 2026-07-15 | PSNL | Personalis, Inc. | Chen Richard | Officer | OPT+S | $15.15 | 100,000 | $1,515,000 | 173,880 |
| 2026-07-16 01:05 | 2026-07-13 | NTRA | Natera, Inc. | Sheena Jonathan | Director | SELL | $265.68 | 3,150 | $836,898 | 246,202 |
| 2026-07-15 20:38 | 2026-07-13 | BLLN | BillionToOne, Inc. | Tsao David | Director, Officer | OPT+S | $124.88 | 20,000 | $2,497,698 | 1,000 |
| 2026-07-15 20:38 | 2026-07-13 | BLLN | BillionToOne, Inc. | ten Bosch John Roderick | Officer | SELL | $125.46 | 4,251 | $533,330 | 29,301 |
| 2026-07-13 20:39 | 2026-07-09 | BLLN | BillionToOne, Inc. | Sakakibara Shan Riku | Officer | OPT+S | $125.00 | 8,000 | $1,000,000 | 204,000 |
| 2026-07-13 20:39 | 2026-07-09 | BLLN | BillionToOne, Inc. | Atay Oguzhan | Director, Officer | OPT+S | $126.10 | 12,500 | $1,576,276 | 0 |
| 2026-07-13 11:06 | 2026-05-15 | CAI | Caris Life Sciences, Inc. | HALBERT JON | Director | BUY | $14.56 | 68,000 | $990,080 | 704,598 |
| 2026-07-10 00:46 | 2026-07-09 | PSNL | Personalis, Inc. | Hall Christopher M | Director, Officer | OPT+S | $15.08 | 100,000 | $1,508,000 | 235,986 |
| 2026-07-08 23:06 | 2026-07-06 | BLLN | BillionToOne, Inc. | Atay Oguzhan | Director, Officer | OPT+S | $122.05 | 38,750 | $4,729,379 | 175,000 |
Sector-Wide Insider Alpha
Analyzing insider movements across the Services-Medical Laboratories sector provides a macro-view of executive conviction. When multiple leaders in different companies within the same SIC code (8071) simultaneously buy shares, it often indicates an industry-wide undervaluation or a positive shift in market cycles.
SEC Filings in Services-Medical Laboratories
Every transaction in the Services-Medical Laboratories 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.