Mersana Therapeutics, Inc.

Introduction

This page provides a comprehensive analysis of the known insider trading history of Ashish Mandelia. Insiders are officers, directors, or significant investors in a company. It is illegal for insiders to make trades in their companies based on specific, non-public information. This does not mean it is illegal for them to make any trades in their own companies. However, they must report all trades to the SEC via a Form 4. Despite these restrictions, academic research suggests that insiders - in general - tend to outperform the market in their own companies.

Average Trade Profitability

The average trade profitability is the average return of all the open market purchases made by the insider in the last three years. To calculate this, we examine every open-market, unplanned purchase made by the insider, excluding all trades that were marked as part of a 10b5-1 trading plan. We then calculate the average performance of those trades over 3, 6, and 12 months, averaging each of those durations to generate a final performance metric for each trade. Finally, we average all of the performance metrics to calculate a performance metric for the insider. This list only includes insiders that have made at least three trades in the last two years.

If this insiders trade profitability is "N/A", then the insider either has not made any open-market purchases in the last three years, or the trades they’ve made are too recent to calculate a reliable performance metric.

Update Frequency: Daily

See the list of most profitable insider traders.

Companies with Reported Insider Positions

The SEC filings indicate Ashish Mandelia has reported holdings or trades in the following companies:

Security Title Latest Reported Holdings
US:MRSN / Mersana Therapeutics, Inc. VP, Chief Accounting Officer 57,519
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by Ashish Mandelia. Non-planned trade are trades that were not made as part of a 10b5-1 trading plan. The stock performance is charted as cumulative percent change in share price. For example, if an insider trade was made on January 1, 2019, the chart will show the daily percent change of the security to the present day. If the share price were to go from $10 to $15 during this time, the cumulative percent change in share price would be 50%. A change in price from $10 to $20 would be 100%, and a change in price of $10 to $5 would be -50%.

Ultimately, we are trying to determine how closely the insider’s trades correlate to excess returns (positive or negative) in the share price in order to see if the insider is timing their trades to profit from insider information. Consider the situation where an insider was doing this. In this situation, we would expect either (a) positive returns after purchases, or (b) negative returns after sales. In the case of (a), the PURCHASE chart would show a series of upwardly sloping curves, indicating positive returns after each purchase transaction. In the case of (b), the SALE chart would show a series of downward sloping curves, indicating negative returns after each sale transaction.

However, this alone is not enough to draw conclusions. If, for example, the share price of the company was in a non-cyclical climb over many years, then we would expect all the post-purchase plots to be upwardly sloping. Likewise, non-cyclical declines over many years would result in downward sloping post-trade plots. Neither of these charts would suggest insider trading activity.

The strongest indicator would be a situation where the share price was extremely cyclical, and there were both positive signals in the PURCHASE chart and negative plots on the SALE chart. This situation would be highly suggestive of an insider that was timing trades to their financial advantage.

Insider Purchases MRSN / Mersana Therapeutics, Inc. - Short Term Profit Analysis

In this section, we analyze the profitability of every unplanned, open-market insider purchase made in MRSN / Mersana Therapeutics, Inc.. This analysis helps to understand if the insider consistently generates abnormal returns, and is worth following. This analysis is for one-year following each trade, and the results are theoretical.

The following table shows the most recent open market purchases that were not part of an automatic trading plan.

Trade Date Ticker Insider Reported
Shares
Reported
Price
Adjusted
Shares
Adjusted
Price
Cost Basis Days to
Max
Price at
Max
Max
Profit ($)
Max Return (%)
2020-06-30 MRSN Mandelia Ashish 3,383 4.8700 135 121.7500 16,475 176 27.5900 -12,750 -77.39

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

MRSN / Mersana Therapeutics, Inc. Insider Trades
Insider Sales MRSN / Mersana Therapeutics, Inc. - Short Term Loss Analysis

In this section, we analyze the short-term loss avoidance of every unplanned, open-market insider sale made in MRSN / Mersana Therapeutics, Inc.. A consistent pattern of loss avoidance may suggest that future sale transactions may predict declines in price. This analysis is for one-year following each trade, and the results are theoretical.

The following table shows the most recent open market sales that were not part of an automatic trading plan.

Trade Date Ticker Insider Reported
Shares
Reported
Price
Adjusted
Shares
Adjusted
Price
Cost Basis Days to
Min
Price at
Min
Max Loss
Avoided ($)
Max Loss
Avoided (%)
2023-01-17 MRSN Mandelia Ashish 3,575 5.7400 143 143.5000 20,520 197 1.0600 -20,368 -99.26
2022-01-18 MRSN Mandelia Ashish 1,982 5.9200 79 148.0000 11,733

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

MRSN / Mersana Therapeutics, Inc. Insider Trades
Insider Trading History

This table shows the complete list of insider trades made by Ashish Mandelia as disclosed to the Securities Exchange Commission (SEC).

File Date Tran Date Form Ticker Security Code 10b5-1 Shares Remaining Shares Percent
Change
Share
Price
Tran
Value
Remaining
Value
2025-01-17 2025-01-16 4 MRSN Mersana Therapeutics, Inc.
Common Stock
S - Sale X -3,554 57,519 -5.82 0.58 -2,061 33,361
2025-01-17 2025-01-15 4 MRSN Mersana Therapeutics, Inc.
Common Stock
M - Exercise 4,166 61,073 7.32
2025-01-17 2025-01-15 4 MRSN Mersana Therapeutics, Inc.
Common Stock
M - Exercise 4,519 56,907 8.63
2025-01-16 2025-01-15 4 MRSN Mersana Therapeutics, Inc.
Common Stock
S - Sale X -1,791 52,388 -3.31 0.63 -1,128 33,004
2025-01-16 2025-01-14 4 MRSN Mersana Therapeutics, Inc.
Common Stock
M - Exercise 4,783 54,179 9.68
2025-01-15 2025-01-14 4 MRSN Mersana Therapeutics, Inc.
Common Stock
S - Sale X -1,007 49,396 -2.00 0.66 -665 32,601
2025-01-15 2025-01-13 4 MRSN Mersana Therapeutics, Inc.
Common Stock
M - Exercise 2,646 50,403 5.54
2024-10-07 2024-10-03 4 MRSN Mersana Therapeutics, Inc.
Common Stock
S - Sale X -3,361 47,757 -6.57 1.96 -6,588 93,604
2024-10-07 2024-10-02 4 MRSN Mersana Therapeutics, Inc.
Common Stock
S - Sale X -4,855 51,118 -8.67 2.00 -9,710 102,236
2024-10-07 2024-10-01 4 MRSN Mersana Therapeutics, Inc.
Common Stock
M - Exercise 30,000 55,973 115.50
2024-01-17 2024-01-16 4 MRSN Mersana Therapeutics, Inc.
Common Stock
S - Sale X -5,025 23,328 -17.72 2.71 -13,618 63,219
2024-01-17 2024-01-15 4 MRSN Mersana Therapeutics, Inc.
Common Stock
M - Exercise 833 28,353 3.03
2024-01-17 2024-01-15 4 MRSN Mersana Therapeutics, Inc.
Common Stock
M - Exercise 4,519 27,520 19.65
2024-01-17 2024-01-14 4 MRSN Mersana Therapeutics, Inc.
Common Stock
M - Exercise 4,783 23,001 26.25
2024-01-17 2024-01-13 4 MRSN Mersana Therapeutics, Inc.
Common Stock
M - Exercise 2,645 18,218 16.98
2023-01-18 2023-01-17 4 MRSN Mersana Therapeutics, Inc.
Common Stock
S - Sale -3,575 13,619 -20.79 5.74 -20,520 78,173
2023-01-18 2023-01-15 4 MRSN Mersana Therapeutics, Inc.
Common Stock
M - Exercise 833 17,194 5.09
2023-01-18 2023-01-15 4 MRSN Mersana Therapeutics, Inc.
Common Stock
M - Exercise 4,519 16,361 38.16
2023-01-18 2023-01-14 4 MRSN Mersana Therapeutics, Inc.
Common Stock
M - Exercise 4,784 11,842 67.78
2022-01-19 2022-01-18 4 MRSN Mersana Therapeutics, Inc.
Common Stock
S - Sale -1,982 3,371 -37.03 5.92 -11,733 19,956
2022-01-19 2022-01-14 4 MRSN Mersana Therapeutics, Inc.
Restricted Stock Units
A - Award 19,133 19,133
2022-01-19 2022-01-14 4 MRSN Mersana Therapeutics, Inc.
Stock Option (right to buy)
A - Award 28,700 28,700
2022-01-19 2022-01-14 4 MRSN Mersana Therapeutics, Inc.
Restricted Stock Units
M - Exercise -4,520 13,557 -25.00
2022-01-19 2022-01-14 4 MRSN Mersana Therapeutics, Inc.
Restricted Stock Units
M - Exercise -833 1,666 -33.33
2022-01-19 2022-01-14 4 MRSN Mersana Therapeutics, Inc.
Common Stock
M - Exercise 5,353 5,353
2021-07-02 2021-07-01 4 MRSN Mersana Therapeutics, Inc.
Common Stock
S - Sale X -942 0 -100.00 13.60 -12,811
2021-01-20 2021-01-19 4 MRSN Mersana Therapeutics, Inc.
Common Stock
S - Sale X -545 0 -100.00 21.28 -11,598
2021-01-20 2021-01-15 4 MRSN Mersana Therapeutics, Inc.
Restricted Stock Units
A - Award 18,077 18,077
2021-01-20 2021-01-15 4 MRSN Mersana Therapeutics, Inc.
Stock Option (right to buy)
A - Award 27,115 27,115
2021-01-20 2021-01-15 4 MRSN Mersana Therapeutics, Inc.
Restricted Stock Units
M - Exercise -834 2,499 -25.02
2021-01-20 2021-01-15 4 MRSN Mersana Therapeutics, Inc.
Common Stock
F - Taxes -289 545 -34.65 21.09 -6,095 11,494
2021-01-20 2021-01-15 4 MRSN Mersana Therapeutics, Inc.
Common Stock
M - Exercise 834 834
2021-01-06 2021-01-04 4 MRSN Mersana Therapeutics, Inc.
Common Stock
S - Sale X -247 0 -100.00 26.76 -6,610
2020-07-06 2020-07-02 4 MRSN Mersana Therapeutics, Inc.
Common Stock
S - Sale X -3,383 0 -100.00 22.49 -76,084
2020-07-06 2020-06-30 4 MRSN Mersana Therapeutics, Inc.
Common Stock
P - Purchase 3,383 3,383 4.87 16,475 16,475
2020-01-16 2020-01-15 4 MRSN Mersana Therapeutics, Inc.
Restricted Stock Units
A - Award 3,333 3,333
2020-01-16 2020-01-15 4 MRSN Mersana Therapeutics, Inc.
Stock Option (right to buy)
A - Award 15,000 15,000
P
Open market or private purchase of non-derivative or derivative security
S
Open market or private sale of non-derivative or derivative security
A
Grant, award, or other acquisition of securities from the company (such as an option)
C
Conversion of derivative
D
Sale or transfer of securities back to the company
F
Payment of exercise price or tax liability using portion of securities received from the company
G
Gift of securities by or to the insider
K
Equity swaps and similar hedging transactions
M
Exercise or conversion of derivative security received from the company (such as an option)
V
A transaction voluntarily reported on Form 4
J
Other (accompanied by a footnote describing the transaction)