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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2026-03-17 20:36 | 2026-03-13 | CSTL | CASTLE BIOSCIENCES INC | MAETZOLD DEREK J | Director, Officer | SELL | $25.75 | 30,779 | $792,408 | 40,779 |
| 2026-03-17 20:08 | 2026-03-16 | FTRE | Fortrea Holdings Inc. | Morais Mark A. | Officer | OPT+S | $9.22 | 1,804 | $16,633 | 69,899 |
| 2026-03-17 01:05 | 2026-03-12 | NTRA | Natera, Inc. | Rabinowitz Matthew | Director, Officer | OPT+S | $191.42 | 200,000 | $38,283,380 | 2,310,772 |
| 2026-03-16 20:07 | 2026-03-12 | CSTL | CASTLE BIOSCIENCES INC | Juvenal Tobin W | Officer | SELL | $25.24 | 20,863 | $526,582 | 86,825 |
| 2026-03-13 20:10 | 2026-03-11 | CSTL | CASTLE BIOSCIENCES INC | MAETZOLD DEREK J | Director, Officer | OPT+S | $25.67 | 44,125 | $1,132,821 | 71,558 |
| 2026-03-13 00:12 | 2026-03-10 | SERA | SERA PROGNOSTICS, INC. | Aerts Austin | Officer | SELL | $1.92 | 7,088 | $13,610 | 264,452 |
| 2026-03-13 00:12 | 2026-03-11 | SERA | SERA PROGNOSTICS, INC. | Boniface John J. | Officer | SELL | $2.04 | 1,517 | $3,095 | 145,842 |
| 2026-03-13 00:12 | 2026-03-11 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | Officer | SELL | $2.04 | 716 | $1,461 | 76,712 |
| 2026-03-13 00:13 | 2026-03-11 | SERA | SERA PROGNOSTICS, INC. | Jackson Benjamin | Officer | SELL | $2.04 | 1,027 | $2,095 | 114,720 |
| 2026-03-13 00:14 | 2026-03-11 | SERA | SERA PROGNOSTICS, INC. | Kearney Paul | Officer | SELL | $2.04 | 1,396 | $2,848 | 163,961 |
| 2026-03-13 00:14 | 2026-03-10 | SERA | SERA PROGNOSTICS, INC. | Lindgardt Zhenya | Director, Officer | SELL | $1.92 | 25,612 | $49,080 | 738,314 |
| 2026-03-11 21:10 | 2026-03-10 | FTRE | Fortrea Holdings Inc. | Mcconnell Jill G. | Officer | OPT+S | $9.07 | 5,061 | $45,903 | 69,796 |
| 2026-03-12 01:35 | 2026-03-10 | NTRA | Natera, Inc. | Chapman Steven Leonard | Director, Officer | SELL | $204.13 | 5,623 | $1,147,838 | 156,607 |
| 2026-03-12 01:35 | 2026-03-10 | NTRA | Natera, Inc. | Brophy Michael Burkes | Officer | SELL | $204.13 | 785 | $160,244 | 63,354 |
| 2026-03-12 01:05 | 2026-03-10 | NTRA | Natera, Inc. | Fesko John | Officer | SELL | $204.13 | 707 | $144,322 | 189,199 |
| 2026-03-12 01:05 | 2026-03-10 | NTRA | Natera, Inc. | Sheena Jonathan | Director | SELL | $204.13 | 127 | $25,925 | 262,325 |
| 2026-03-12 01:05 | 2026-03-10 | NTRA | Natera, Inc. | RABINOWITZ DANIEL | Officer | SELL | $204.13 | 1,745 | $356,212 | 233,285 |
| 2026-03-11 22:05 | 2026-03-10 | NTRA | Natera, Inc. | Moshkevich Solomon | Officer | SELL | $204.13 | 915 | $186,781 | 150,882 |
| 2026-03-11 21:14 | 2026-03-10 | FTRE | Fortrea Holdings Inc. | Morais Mark A. | Officer | OPT+S | $9.07 | 4,599 | $41,713 | 67,419 |
| 2026-03-11 21:16 | 2026-03-10 | FTRE | Fortrea Holdings Inc. | Parks Robert | Officer | OPT+S | $9.07 | 1,927 | $17,478 | 22,389 |
| 2026-03-10 21:54 | 2026-03-09 | SERA | SERA PROGNOSTICS, INC. | Kearney Paul | Officer | SELL | $1.96 | 2,026 | $3,971 | 165,357 |
| 2026-03-10 21:53 | 2026-03-09 | SERA | SERA PROGNOSTICS, INC. | Jackson Benjamin | Officer | SELL | $1.96 | 3,119 | $6,113 | 115,747 |
| 2026-03-10 21:53 | 2026-03-09 | SERA | SERA PROGNOSTICS, INC. | Boniface John J. | Officer | SELL | $1.96 | 3,038 | $5,954 | 147,359 |
| 2026-03-10 21:53 | 2026-03-09 | SERA | SERA PROGNOSTICS, INC. | Aerts Austin | Officer | SELL | $1.96 | 674 | $1,321 | 271,540 |
| 2026-03-10 21:53 | 2026-03-09 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | Officer | SELL | $1.96 | 3,360 | $6,586 | 77,428 |
| 2026-03-11 01:05 | 2026-03-06 | NTRA | Natera, Inc. | RABINOWITZ DANIEL | Officer | OPT+S | $196.08 | 8,398 | $1,646,696 | 233,285 |
| 2026-03-09 20:12 | 2026-03-05 | CSTL | CASTLE BIOSCIENCES INC | Cole G Bradley | Director | OPT+S | $28.47 | 7,403 | $210,727 | 19,309 |
| 2026-03-10 01:35 | 2026-03-05 | GRAL | GRAIL, Inc. | RAGUSA ROBERT P | Director, Officer | SELL | $48.48 | 8,441 | $409,246 | 642,084 |
| 2026-03-10 01:36 | 2026-03-05 | GRAL | GRAIL, Inc. | Ofman Joshua J. | Officer | SELL | $48.86 | 3,627 | $177,227 | 432,881 |
| 2026-03-10 01:36 | 2026-03-05 | GRAL | GRAIL, Inc. | Freidin Aaron | Officer | SELL | $48.96 | 3,147 | $154,062 | 306,475 |
| 2026-03-09 22:38 | 2026-03-06 | GH | Guardant Health, Inc. | Hidalgo Medina Manuel | Director | OPT+S | $91.54 | 1,300 | $118,997 | 1,193 |
| 2026-03-09 20:13 | 2026-03-05 | CSTL | CASTLE BIOSCIENCES INC | Stokes Frank | Officer | SELL | $27.98 | 6,001 | $167,908 | 60,085 |
| 2026-03-07 00:32 | 2026-03-04 | VCYT | VERACYTE, INC. | Leite John | Officer | SELL | $35.19 | 5,260 | $185,083 | 107,580 |
| 2026-03-07 00:32 | 2026-03-04 | VCYT | VERACYTE, INC. | McGuire Annie | Officer | SELL | $35.55 | 6,658 | $236,725 | 94,706 |
| 2026-03-07 00:33 | 2026-03-04 | VCYT | VERACYTE, INC. | Chambers Rebecca | Officer | SELL | $36.14 | 18,341 | $662,869 | 131,196 |
| 2026-03-07 00:32 | 2026-03-04 | VCYT | VERACYTE, INC. | Stapley Marc | Director, Officer | SELL | $35.97 | 45,523 | $1,637,594 | 357,554 |
| 2026-03-07 00:45 | 2026-03-05 | DGX | QUEST DIAGNOSTICS INC | Doherty Catherine T. | Officer | SELL | $206.21 | 5,558 | $1,146,115 | 67,122 |
| 2026-03-07 03:25 | 2026-03-06 | SERA | SERA PROGNOSTICS, INC. | Lawrence Sandra AJ | Director | SELL | $1.95 | 1,560 | $3,042 | 18,033 |
| 2026-03-07 00:43 | 2026-03-04 | DGX | QUEST DIAGNOSTICS INC | KUPPUSAMY KARTHIK | Officer | SELL | $204.86 | 2,628 | $538,372 | 13,441 |
| 2026-03-07 00:44 | 2026-03-05 | DGX | QUEST DIAGNOSTICS INC | Plewman Patrick | Officer | SELL | $206.21 | 2,855 | $588,730 | 15,198 |
| 2026-03-07 00:44 | 2026-03-05 | DGX | QUEST DIAGNOSTICS INC | PREVOZNIK MICHAEL E | Officer | SELL | $206.21 | 3,878 | $799,682 | 37,557 |
| 2026-03-06 01:44 | 2026-03-04 | GH | Guardant Health, Inc. | Kalia Kumud | Officer | OPT+S | $95.32 | 40,000 | $3,812,660 | 37,643 |
| 2026-03-06 01:08 | 2026-03-03 | CSTL | CASTLE BIOSCIENCES INC | Stokes Frank | Officer | OPT+S | $27.44 | 7,000 | $192,073 | 52,483 |
| 2026-03-05 16:57 | 2026-03-03 | LH | LABCORP HOLDINGS INC. | Schechter Adam H | Director, Officer | SELL | $279.96 | 8,705 | $2,437,047 | 80,773 |
| 2026-03-05 00:16 | 2026-03-02 | VCYT | VERACYTE, INC. | Febbo Phillip G. | Officer | SELL | $36.16 | 13,425 | $485,429 | 117,346 |
| 2026-03-05 00:38 | 2026-03-03 | DGX | QUEST DIAGNOSTICS INC | Plewman Patrick | Officer | SELL | $207.73 | 410 | $85,169 | 15,198 |
| 2026-03-05 00:38 | 2026-03-02 | DGX | QUEST DIAGNOSTICS INC | Davis J. E. | Director, Officer | SELL | $212.52 | 10,000 | $2,125,200 | 117,185 |
| 2026-03-05 00:38 | 2026-03-03 | DGX | QUEST DIAGNOSTICS INC | PREVOZNIK MICHAEL E | Officer | SELL | $207.73 | 526 | $109,266 | 37,557 |
| 2026-03-05 00:39 | 2026-03-03 | DGX | QUEST DIAGNOSTICS INC | Doherty Catherine T. | Officer | SELL | $207.73 | 632 | $131,285 | 67,122 |
| 2026-03-04 23:00 | 2026-03-03 | XGN | EXAGEN INC. | ABALLI JOHN | Director, Officer | SELL | $3.62 | 15,698 | $56,827 | 687,299 |
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.