MERSANA THERAPEUTICS (MRSN) Faces Unusual Short Selling Activity

Published in Stocks and Investing on Tuesday, July 29th 2025 at 4:11 GMT by WOPRAI
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The chart below shows ALL of the short selling each day in MERSANA THERAPEUTICS, INC. (MRSN). 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 MERSANA THERAPEUTICS, INC.. An average of 40.42% of the daily trading in MRSN 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 MRSN 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
2025-07-28	104,937	223,345	46.98	7.01	735,608
2025-07-25	2,676,866	5,441,223	49.2	0.306	819,121
2025-07-24	3,155,855	9,180,331	34.38	0.328	1,035,120
2025-07-23	1,089,823	4,096,197	26.61	0.399	434,839
2025-07-22	152,135	960,360	15.84	0.359	54,616
2025-07-21	447,808	1,767,423	25.34	0.364	163,002
2025-07-18	546,688	1,483,267	36.86	0.359	196,261
2025-07-17	952,079	2,840,837	33.51	0.364	346,557
2025-07-16	335,760	1,029,999	32.6	0.337	113,218
2025-07-15	774,238	1,397,694	55.39	0.328	253,950
2025-07-14	461,916	1,323,381	34.9	0.341	157,513
2025-07-11	1,638,393	4,505,588	36.36	0.362	593,098
2025-07-10	1,427,795	6,350,486	22.48	0.369	526,856
2025-07-09	1,054,012	3,077,501	34.25	0.337	355,202
2025-07-08	853,500	2,295,887	37.18	0.313	267,146
2025-07-07	581,688	2,305,014	25.24	0.309	179,742
2025-07-03	648,493	1,798,852	36.05	0.291	188,711
2025-07-02	709,019	2,182,616	32.48	0.279	197,816
2025-07-01	1,039,186	2,736,919	37.97	0.286	297,207
2025-06-30	2,113,572	3,554,813	59.46	0.291	615,049
2025-06-27	2,449,804	12,627,824	19.4	0.296	725,142
2025-06-26	1,587,074	2,859,829	55.5	0.333	528,496
2025-06-25	434,515	1,225,946	35.44	0.346	150,342
2025-06-24	161,036	1,101,272	14.62	0.348	56,041
2025-06-23	752,908	1,710,662	44.01	0.343	258,247
2025-06-20	614,956	1,554,358	39.56	0.361	221,999
2025-06-18	341,156	807,730	42.24	0.356	121,452
2025-06-17	656,647	1,442,693	45.52	0.363	238,363
2025-06-16	341,833	1,504,083	22.73	0.378	129,213
2025-06-13	418,762	1,306,097	32.06	0.361	151,173
2025-06-12	847,416	2,143,514	39.53	0.366	310,154
2025-06-11	1,396,426	2,474,434	56.43	0.399	557,174
2025-06-10	1,784,868	4,355,265	40.98	0.422	753,214
2025-06-09	658,466	2,346,912	28.06	0.389	256,143
2025-06-06	1,202,031	2,703,203	44.47	0.387	465,186
2025-06-05	689,306	1,236,681	55.74	0.368	253,665
2025-06-04	701,129	1,211,501	57.87	0.357	250,303

Total	963,129,278	2,382,513,268	40.42	3.91	3,768,485,479

* Totals include all data records back to 2020-07-30 00:00:00, data set is truncated for viewing.

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MERSANA THERAPEUTICS (MRSN) Faces Unusual Short Selling Activity