MASIMO Corp Faces Potential Illicit Short Selling: Data Reveals Abnormally High Levels

Published in Stocks and Investing on Thursday, August 7th 2025 at 4:11 GMT by WOPRAI
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The chart below shows ALL of the short selling each day in MASIMO CORPORATION (MASI). We have consolidated the tape of ALL US stock exchanges and dark pools (this means we get the TRADE IDENTIFIER showing whether the trade was a buy, sell or sell short). The data below shows just the short sales each day in your stock. It includes both EXEMPT (market makers) and NON-EXEMPT (everyone else) short sales in MASIMO CORPORATION. An average of 38.01% of the daily trading in MASI is short selling. This is abnormally high and implies there is illicit trading taking place in your stock. We run automated surveillance and reporting algorithms that report manipulative market making and short selling (to FINRA, SEC, Whistleblower's Office and Dept of Treasury FINCEN). We then issue FINRA COMPLIANT research to our large user base to counteract this activity that is driving MASI lower unfairly.

You can find the full report at [ https://www.woprai.com/ ]

Please find the applicable data below, drawn from all major market providers.

Date	Short Volume	Total Volume	Percentage	Squeeze Trigger	$ Value
2025-08-06	2,050,580	3,724,329	55.06	142.84	292,904,847
2025-08-05	518,946	1,121,396	46.28	162.56	84,359,862
2025-08-04	289,556	962,007	30.1	160.46	46,462,156
2025-08-01	155,158	476,023	32.59	154.05	23,902,090
2025-07-31	189,500	633,326	29.92	155.82	29,527,890
2025-07-30	269,953	861,588	31.33	158.65	42,828,043
2025-07-29	191,004	487,972	39.14	159.94	30,549,180
2025-07-28	183,498	549,021	33.42	162.8	29,873,474
2025-07-25	260,439	561,628	46.37	164.1	42,738,040
2025-07-24	213,644	454,270	47.03	163.32	34,892,338
2025-07-23	300,365	631,380	47.57	164.32	49,355,977
2025-07-22	190,846	571,836	33.37	157.53	30,063,970
2025-07-21	183,411	411,619	44.56	154.92	28,414,032
2025-07-18	257,597	509,163	50.59	155.22	39,984,206
2025-07-17	214,107	491,420	43.57	158.42	33,918,831
2025-07-16	201,791	418,368	48.23	159.44	32,173,557
2025-07-15	175,954	461,184	38.15	160.23	28,193,109
2025-07-14	253,631	556,034	45.61	161.95	41,075,540
2025-07-11	224,076	452,222	49.55	162.64	36,443,721
2025-07-10	118,648	356,274	33.3	166.87	19,798,792
2025-07-09	146,947	389,053	37.77	164.65	24,194,824
2025-07-08	361,290	868,113	41.62	162.59	58,742,141
2025-07-07	313,868	832,075	37.72	164.23	51,546,542
2025-07-03	236,464	498,668	47.42	167.49	39,605,355
2025-07-02	215,398	431,836	49.88	171	36,833,058
2025-07-01	213,077	539,421	39.5	169.3	36,073,936
2025-06-30	147,775	394,424	37.47	168.17	24,851,322
2025-06-27	492,885	1,028,725	47.91	167.92	82,765,249
2025-06-26	368,645	590,101	62.47	167.06	61,585,834
2025-06-25	244,204	561,795	43.47	169.86	41,480,491
2025-06-24	355,614	856,773	41.51	169.23	60,180,557
2025-06-23	199,063	392,936	50.66	166.93	33,229,587
2025-06-20	313,688	629,000	49.87	165.32	51,858,900
2025-06-18	215,435	362,310	59.46	162.38	34,982,335
2025-06-17	195,567	349,193	56.01	160.04	31,298,543
2025-06-16	230,985	429,045	53.84	162.67	37,574,330
2025-06-13	278,880	547,190	50.97	160.66	44,804,861

Total	280,134,959	731,574,056	38.29	153.54	43,012,815,867

* Totals include all data records back to 2020-08-10 00:00:00, data set is truncated for viewing.

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MASIMO Corp Faces Potential Illicit Short Selling: Data Reveals Abnormally High Levels