Introduction

This page provides a comprehensive analysis of the known insider trading history of Shankh Mitra. 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 Shankh Mitra has reported holdings or trades in the following companies:

Security Title Latest Reported Holdings
US:PSA / Public Storage Director 8,653
US:WELL / Welltower Inc. CEO, Director 77,275
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by Shankh Mitra. 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 Trading History

This table shows the complete list of insider trades made by Shankh Mitra 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
2025-07-01 2025-06-30 4 PSA Public Storage
Common Shares
A - Award 113 8,653 1.32 293.42 33,156 2,538,963
2025-06-17 2025-06-17 4 WELL WELLTOWER INC.
Common Stock
G - Gift -495 77,275 -0.64
2025-06-17 2025-05-30 4 WELL WELLTOWER INC.
Common Stock
A - Award 112 77,770 0.14 113.93 12,760 8,860,336
2025-03-31 2025-03-31 4 PSA Public Storage
Common Shares
A - Award 111 8,540 1.32 299.29 33,221 2,555,937
2025-01-03 2024-12-31 4 PSA Public Storage
Common Shares
A - Award 111 8,429 1.33 299.44 33,238 2,523,980
2024-12-10 2024-11-29 4 WELL WELLTOWER INC.
Common Stock
A - Award 105 77,658 0.14 104.06 10,926 8,081,091
2024-12-10 2024-05-31 4 WELL WELLTOWER INC.
Common Stock
A - Award 157 77,553 0.20 89.46 14,045 6,937,891
2024-10-01 2024-09-30 4 PSA Public Storage
Common Shares
A - Award 92 8,318 1.12 363.87 33,476 3,026,671
2024-07-02 2024-06-30 4 PSA Public Storage
Common Shares
A - Award 116 8,226 1.43 287.65 33,367 2,366,209
2024-06-24 2024-06-24 4 WELL WELLTOWER INC.
Common Stock
G - Gift -244 77,396 -0.31
2024-04-03 2024-03-31 4 PSA Public Storage
Common Shares
A - Award 115 8,110 1.44 290.06 33,357 2,352,387
2024-01-03 2023-12-31 4 PSA Public Storage
Common Shares
A - Award 105 7,995 1.33 305.00 32,025 2,438,475
2023-12-12 2023-12-12 4 WELL WELLTOWER INC.
Common Stock
G - Gift -345 77,640 -0.44
2023-11-03 2023-11-02 4 WELL WELLTOWER INC.
Common Stock
G - Gift -2,907 77,985 -3.59
2023-10-03 2023-09-30 4 PSA Public Storage
Common Shares
A - Award 121 7,890 1.56 263.52 31,886 2,079,173
2023-07-03 2023-06-30 4 PSA Public Storage
Common Shares
A - Award 110 7,769 1.44 291.88 32,107 2,267,616
2023-06-20 2023-06-20 4 WELL WELLTOWER INC.
Common Stock
G - Gift -80 80,892 -0.10
2023-06-20 2023-06-16 4 WELL WELLTOWER INC.
Common Stock
G - Gift -328 80,972 -0.40
2023-06-20 2023-05-31 4 WELL WELLTOWER INC.
Common Stock
A - Award 352 81,300 0.43 60.34 21,240 4,905,642
2023-04-04 2023-03-31 4 PSA Public Storage
Common Stock
A - Award 106 7,659 1.40 302.14 32,027 2,314,090
2023-01-18 2023-01-15 4 WELL WELLTOWER INC.
Common Stock
F - Taxes -586 80,948 -0.72 71.15 -41,694 5,759,450
2023-01-05 2023-01-03 4 WELL WELLTOWER INC.
Common Stock
D - Sale to Issuer -18,607 81,534 -18.58
2023-01-04 2022-12-31 4 PSA Public Storage
Common Stock
A - Award 122 7,553 1.64 280.19 34,183 2,116,275
2022-12-21 2022-11-30 4 WELL WELLTOWER INC.
Common Stock
A - Award 283 100,141 0.28 60.38 17,086 6,046,113
2022-10-03 2022-09-30 4 PSA Public Storage
Common Stock
A - Award 115 7,431 1.57 292.81 33,673 2,175,871
2022-07-01 2022-06-30 4 PSA Public Storage
Common Stock
A - Award 108 7,316 1.50 312.67 33,768 2,287,494
2022-05-02 2022-04-28 4 PSA Public Storage
Stock Option (Right to Buy)
A - Award 5,000 5,000
2022-04-27 2022-04-26 4 PSA Public Storage
Stock Option (Right to Buy)
M - Exercise -1,666 3,334 -33.32
2022-04-27 2022-04-26 4 PSA Public Storage
Common Stock
M - Exercise 1,666 7,208 30.06 275.12 458,350 1,983,065
2022-04-04 2022-03-31 4 PSA Public Storage
Common Stock
A - Award 87 5,542 1.59 390.28 33,954 2,162,932
2022-02-17 2022-02-15 4 WELL WELLTOWER INC.
Deferred Stock Units
M - Exercise -25,444 0 -100.00
2022-02-17 2022-02-15 4 WELL WELLTOWER INC.
Common Stock
F - Taxes -10,013 99,858 -9.11 81.16 -812,655 8,104,475
2022-02-17 2022-02-15 4 WELL WELLTOWER INC.
Common Stock
M - Exercise 25,444 109,871 30.14
2022-01-18 2022-01-15 4 WELL WELLTOWER INC.
Common Stock
F - Taxes -3,184 84,427 -3.63 87.51 -278,632 7,388,207
2022-01-14 2022-01-12 4 WELL WELLTOWER INC.
Employee Stock Option (right to buy)
A - Award 128,694 128,694
2022-01-03 2022-01-03 4 PSA Public Storage
Stock Option (Right to Buy)
M - Exercise 5,000 0 -100.00
2022-01-03 2022-01-03 4 PSA Public Storage
Common Stock
M - Exercise 5,000 5,455 1,098.90 230.93 1,154,650 1,259,723
2022-01-03 2021-12-31 4 PSA Public Storage
Common Stock
A - Award 91 455 25.00 374.56 34,085 170,425
2021-12-02 2021-05-28 4 WELL WELLTOWER INC.
Common Stock
A - Award 393 87,611 0.45 53.97 21,210 4,728,366
2021-10-04 2021-09-30 4 PSA Public Storage
Common Stock
A - Award 114 364 45.60 297.10 33,869 108,144
2021-07-02 2021-06-30 4 PSA Public Storage
Common Stock
A - Award 113 250 82.48 300.69 33,978 75,172
2021-04-28 2021-04-26 4 PSA Public Storage
Stock Option (Right to Buy)
A - Award 5,000 5,000
2021-04-02 2021-03-31 4 PSA Public Storage
Common Stock
A - Award 137 137 246.76 33,806 33,806
2021-02-17 2021-02-16 4 WELL WELLTOWER INC.
Employee Stock Option (right to buy)
A - Award 102,465 0 -100.00
2021-02-17 2021-02-16 4 WELL WELLTOWER INC.
Common Stock
A - Award 11,165 87,218 14.68
2021-02-17 2021-02-12 4 WELL WELLTOWER INC.
Deferred Stock
M - Exercise -9,226 0 -100.00
2021-02-17 2021-02-12 4 WELL WELLTOWER INC.
Deferred Stock Units
M - Exercise -10,545 0 -100.00
2021-02-17 2021-02-12 4 WELL WELLTOWER INC.
Common Stock
F - Taxes -4,720 76,053 -5.84 67.51 -318,647 5,134,338
2021-02-17 2021-02-12 4 WELL WELLTOWER INC.
Common Stock
M - Exercise 9,226 80,773 12.90
2021-02-17 2021-02-12 4 WELL WELLTOWER INC.
Common Stock
F - Taxes -5,394 71,547 -7.01 67.51 -364,149 4,830,138
2021-02-17 2021-02-12 4 WELL WELLTOWER INC.
Common Stock
M - Exercise 10,545 76,941 15.88
2021-01-20 2021-01-15 4 WELL WELLTOWER INC.
Common Stock
F - Taxes -6,898 66,396 -9.41 64.25 -443,196 4,265,943
2021-01-05 2020-12-31 4 WELL WELLTOWER INC.
Deferred Stock Units
M - Exercise -2,521 0 -100.00
2021-01-05 2020-12-31 4 WELL WELLTOWER INC.
Common Stock
F - Taxes -1,007 73,294 -1.36 64.62 -65,072 4,736,258
2021-01-05 2020-12-31 4 WELL WELLTOWER INC.
Common Stock
M - Exercise 2,521 74,301 3.51
2021-01-04 2021-01-01 4 PSA Public Storage
Stock Option (Right to Buy)
A - Award 15,000 15,000
2020-12-07 2020-12-04 4 WELL WELLTOWER INC.
Common Stock
A - Award 4,868 71,780 7.28
2020-12-03 2020-05-31 4 WELL WELLTOWER INC.
Common Stock
A - Award 300 66,912 0.45 43.07 12,921 2,881,900
2020-02-19 2020-02-14 4 WELL WELLTOWER INC.
Deferred Stock Units
M - Exercise -2,521 2,521 -50.00
2020-02-19 2020-02-14 4 WELL WELLTOWER INC.
Common Stock
A - Award 15,598 66,612 30.58
2020-02-19 2020-02-14 4 WELL WELLTOWER INC.
Common Stock
F - Taxes -1,290 51,014 -2.47 89.32 -115,223 4,556,570
2020-02-19 2020-02-14 4 WELL WELLTOWER INC.
Common Stock
M - Exercise 2,521 52,304 5.06
2020-01-17 2020-01-15 4 WELL WELLTOWER INC.
Common Stock
F - Taxes -5,366 49,783 -9.73 84.95 -455,842 4,229,066
2020-01-03 2019-12-31 4 WELL WELLTOWER INC.
Deferred Stock Units
M - Exercise -2,876 0 -100.00
2020-01-03 2019-12-31 4 WELL WELLTOWER INC.
Common Stock
F - Taxes -1,124 55,149 -2.00 81.78 -91,921 4,510,085
2020-01-03 2019-12-31 4 WELL WELLTOWER INC.
Common Stock
M - Exercise 2,876 56,273 5.39
2019-12-09 2019-11-29 4 WELL WELLTOWER INC.
Common Stock
A - Award 3 53,397 0.01 69.71 209 3,722,251
2019-12-09 2019-05-31 4 WELL WELLTOWER INC.
Common Stock
A - Award 340 53,394 0.64 61.75 20,996 3,297,240
2019-02-19 2019-02-14 4 WELL WELLTOWER INC.
Common Stock
A - Award 9,682 53,054 22.32
2019-02-11 2019-02-07 4 WELL WELLTOWER INC.
Deferred Stock Units
M - Exercise -2,876 2,876 -50.00
2019-02-11 2019-02-07 4 WELL WELLTOWER INC.
Common Stock
F - Taxes -1,319 43,372 -2.95 77.05 -101,629 3,341,813
2019-02-11 2019-02-07 4 WELL WELLTOWER INC.
Commom Stock
M - Exercise 2,876 44,691 6.88
2019-01-17 2019-01-15 4 WELL WELLTOWER INC.
Common Stock
F - Taxes -3,322 41,815 -7.36 72.39 -240,480 3,026,988
2019-01-08 2019-01-04 4 WELL WELLTOWER INC.
Common Stock
F - Taxes -1,223 45,137 -2.64 68.28 -83,506 3,081,954
2018-12-10 2018-11-30 4 WELL WELLTOWER INC.
Common Stock
A - Award 97 46,360 0.21 49.32 4,784 2,286,336
2018-12-10 2018-05-31 4 WELL WELLTOWER INC.
Common Stock
A - Award 285 46,263 0.62 49.00 13,966 2,267,026
2018-08-13 2018-08-10 4 WELL WELLTOWER INC.
Common Stock
G - Gift -62 45,978 -0.13
2018-08-13 2018-08-10 4 WELL WELLTOWER INC.
Common Stock
P - Purchase 62 46,040 0.13 63.55 3,940 2,925,842
2018-08-13 2018-08-09 4 WELL WELLTOWER INC.
Common Stock
A - Award 3,173 45,978 7.41
2018-02-20 2018-02-15 4 HCN WELLTOWER INC.
Common Stock
A - Award 3,626 42,805 9.25
2018-02-12 2018-02-08 4 HCN WELLTOWER INC.
Common Stock
A - Award 13,719 39,179 53.88
2018-01-17 2018-01-15 4 HCN WELLTOWER INC.
Common Stock
F - Taxes -1,499 25,460 -5.56 59.16 -88,681 1,506,214
2018-01-08 2018-01-04 4 HCN WELLTOWER INC.
Common Stock
F - Taxes -430 26,959 -1.57 62.76 -26,987 1,691,947
2017-08-03 2017-08-01 4 HCN WELLTOWER INC.
Performance-Based Restricted Stock Units
A - Award 526 526
2017-08-03 2017-08-01 4 HCN WELLTOWER INC.
Performance-Based Restricted Stock Units
A - Award 943 943
2017-02-22 3 HCN WELLTOWER INC.
Common Stock
54,778
2017-02-22 3 HCN WELLTOWER INC.
Common Stock
54,778
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)