Century Aluminum Company
US ˙ NasdaqGS ˙ US1564311082

Introduction

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

Security Title Latest Reported Holdings
US:PLL / Piedmont Lithium Inc. Director 0
Director 447
US:CNA / CNA Financial Corporation Director 2,500
US:CENX / Century Aluminum Company President and CEO, Director 353,989
US:SSD / Simpson Manufacturing Co., Inc. Director 2,587
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by Michael A Bless. 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 CENX / Century Aluminum Company - Short Term Profit Analysis

In this section, we analyze the profitability of every unplanned, open-market insider purchase made in CENX / Century Aluminum Company. 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 (%)
There are no known unplanned open-market trades for this insider and security combination

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

CENX / Century Aluminum Company Insider Trades
Insider Sales CENX / Century Aluminum Company - Short Term Loss Analysis

In this section, we analyze the short-term loss avoidance of every unplanned, open-market insider sale made in CENX / Century Aluminum Company. 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 (%)
2021-03-03 CENX BLESS MICHAEL A 15,000 17.6200 15,000 17.6200 264,300 169 10.5800 -105,600 -39.95
2021-03-02 CENX BLESS MICHAEL A 25,000 16.4000 25,000 16.4000 410,000
2021-03-02 CENX BLESS MICHAEL A 10,000 16.4000 10,000 16.4000 164,000
2021-03-01 CENX BLESS MICHAEL A 7,500 14.4500 7,500 14.4500 108,375
2021-02-25 CENX BLESS MICHAEL A 15,000 14.9500 15,000 14.9500 224,250
2021-02-24 CENX BLESS MICHAEL A 25,000 14.7900 25,000 14.7900 369,750
2021-02-24 CENX BLESS MICHAEL A 15,000 15.2200 15,000 15.2200 228,300
2021-02-22 CENX BLESS MICHAEL A 12,500 14.3400 12,500 14.3400 179,250
2020-12-17 CENX BLESS MICHAEL A 10,000 11.2700 10,000 11.2700 112,700
2020-12-15 CENX BLESS MICHAEL A 15,000 10.7600 15,000 10.7600 161,400
2020-12-10 CENX BLESS MICHAEL A 25,000 11.8300 25,000 11.8300 295,750
2020-12-09 CENX BLESS MICHAEL A 13,439 11.6300 13,439 11.6300 156,296
2020-08-13 CENX BLESS MICHAEL A 37,324 10.1300 37,324 10.1300 378,092
2020-08-12 CENX BLESS MICHAEL A 44,282 10.2600 44,282 10.2600 454,333
2020-08-11 CENX BLESS MICHAEL A 35,000 10.2700 35,000 10.2700 359,450
2020-06-26 CENX BLESS MICHAEL A 15,000 6.6800 15,000 6.6800 100,200
2020-06-25 CENX BLESS MICHAEL A 40,000 6.6100 40,000 6.6100 264,400
2020-06-24 CENX BLESS MICHAEL A 50,000 6.9400 50,000 6.9400 347,000
2020-06-23 CENX BLESS MICHAEL A 46,912 7.2300 46,912 7.2300 339,174
2020-06-22 CENX BLESS MICHAEL A 44,714 6.8600 44,714 6.8600 306,738
2019-12-26 CENX BLESS MICHAEL A 25,000 7.5500 25,000 7.5500 188,750
2019-12-23 CENX BLESS MICHAEL A 25,000 7.5600 25,000 7.5600 189,000
2019-11-08 CENX BLESS MICHAEL A 50,000 8.2600 50,000 8.2600 413,000
2019-03-21 CENX BLESS MICHAEL A 25,000 8.9600 25,000 8.9600 224,000
2017-05-25 CENX BLESS MICHAEL A 27,618 14.8800 27,618 14.8800 410,956

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

CENX / Century Aluminum Company Insider Trades
Insider Purchases CNA / CNA Financial Corporation - Short Term Profit Analysis

In this section, we analyze the profitability of every unplanned, open-market insider purchase made in CENX / Century Aluminum Company. 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 (%)
2022-05-10 CNA BLESS MICHAEL A 2,500 44.1800 2,500 44.1800 110,450 28 46.5200 5,850 5.30

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

CNA / CNA Financial Corporation Insider Trades
Insider Sales CNA / CNA Financial Corporation - Short Term Loss Analysis

In this section, we analyze the short-term loss avoidance of every unplanned, open-market insider sale made in CENX / Century Aluminum Company. 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 (%)
There are no known unplanned open-market trades for this insider and security combination

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

CNA / CNA Financial Corporation Insider Trades
Insider Purchases SSD / Simpson Manufacturing Co., Inc. - Short Term Profit Analysis

In this section, we analyze the profitability of every unplanned, open-market insider purchase made in CENX / Century Aluminum Company. 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 (%)
There are no known unplanned open-market trades for this insider and security combination

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

SSD / Simpson Manufacturing Co., Inc. Insider Trades
Insider Sales SSD / Simpson Manufacturing Co., Inc. - Short Term Loss Analysis

In this section, we analyze the short-term loss avoidance of every unplanned, open-market insider sale made in CENX / Century Aluminum Company. 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 (%)
2021-02-12 SSD BLESS MICHAEL A 904 95.0900 904 95.0900 85,961 0 95.53 398 0.46
2021-02-12 SSD BLESS MICHAEL A 346 95.5100 346 95.5100 33,046
2021-02-11 SSD BLESS MICHAEL A 2,000 93.4900 2,000 93.4900 186,980

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

SSD / Simpson Manufacturing Co., Inc. Insider Trades
Insider Trading History

This table shows the complete list of insider trades made by Michael A Bless 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
2025-08-29 2025-08-29 4 PLL Piedmont Lithium Inc.
Common Stock, par value $0.0001
D - Sale to Issuer -11,065 0 -100.00
2024-06-13 2024-06-13 4 PLL Piedmont Lithium Inc.
Common Stock, par value $0.0001
A - Award 7,724 11,065 231.19
2023-06-15 2023-06-13 4 PLL Piedmont Lithium Inc.
Common Stock, par value $0.0001
A - Award 1,591 3,341 90.91
2023-03-10 2023-03-08 4 PLL Piedmont Lithium Inc.
Common Stock, par value $0.0001
P - Purchase 1,750 1,750 60.14 105,254 105,254
2022-05-31 2022-05-26 4 ACT Enact Holdings, Inc.
Deferred Stock Units
A - Award 3 447 0.68
2022-05-16 2022-05-12 4 ACT Enact Holdings, Inc.
Deferred Stock Units
A - Award 6,452 6,896 1,454.73
2022-05-12 2022-05-10 4 ACT Enact Holdings, Inc.
Common Stock
P - Purchase 5,000 5,000 22.04 110,180 110,180
2022-05-11 2022-05-10 4 CNA CNA FINANCIAL CORP
Common Stock
P - Purchase 2,500 2,500 44.18 110,450 110,450
2022-04-04 2022-03-31 4 ACT Enact Holdings, Inc.
Deferred Stock Units
A - Award 444 444
2021-03-05 2021-03-03 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -15,000 353,989 -4.07 17.62 -264,300 6,237,286
2021-03-03 2021-03-02 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -10,000 368,989 -2.64 16.40 -164,000 6,051,420
2021-03-03 2021-03-02 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -25,000 378,989 -6.19 16.40 -410,000 6,215,420
2021-03-03 2021-03-01 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -7,500 403,989 -1.82 14.45 -108,375 5,837,641
2021-02-26 2021-02-25 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -15,000 411,489 -3.52 14.95 -224,250 6,151,761
2021-02-26 2021-02-24 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -15,000 426,489 -3.40 15.22 -228,300 6,491,163
2021-02-26 2021-02-24 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -25,000 441,489 -5.36 14.79 -369,750 6,529,622
2021-02-24 2021-02-22 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -12,500 466,489 -2.61 14.34 -179,250 6,689,452
2021-02-16 2021-02-12 4 SSD Simpson Manufacturing Co., Inc.
Common Stock
S - Sale -346 2,587 -11.80 95.51 -33,046 247,084
2021-02-16 2021-02-12 4 SSD Simpson Manufacturing Co., Inc.
Common Stock
S - Sale -904 2,933 -23.56 95.09 -85,961 278,899
2021-02-16 2021-02-11 4 SSD Simpson Manufacturing Co., Inc.
Common Stock
S - Sale -2,000 3,837 -34.26 93.49 -186,980 358,721
2021-01-05 2021-01-01 4 CENX CENTURY ALUMINUM CO
Common Stock
A - Award 67,152 478,989 16.31
2021-01-05 2020-12-31 4 CENX CENTURY ALUMINUM CO
Common Stock
F - Taxes -77,955 411,837 -15.92 11.03 -859,844 4,542,562
2021-01-05 2020-12-31 4 CENX CENTURY ALUMINUM CO
Common Stock
A - Award 175,969 489,792 56.07
2021-01-05 2020-12-31 4 CENX CENTURY ALUMINUM CO
Common Stock
F - Taxes -22,286 313,823 -6.63 11.03 -245,815 3,461,468
2020-12-18 2020-12-17 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -10,000 336,109 -2.89 11.27 -112,700 3,787,948
2020-12-17 2020-12-15 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -15,000 346,109 -4.15 10.76 -161,400 3,724,133
2020-12-11 2020-12-10 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -25,000 361,109 -6.47 11.83 -295,750 4,271,919
2020-12-11 2020-12-09 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -13,439 386,109 -3.36 11.63 -156,296 4,490,448
2020-08-14 2020-08-13 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -37,324 399,548 -8.54 10.13 -378,092 4,047,421
2020-08-13 2020-08-12 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -44,282 436,872 -9.20 10.26 -454,333 4,482,307
2020-08-13 2020-08-11 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -35,000 481,154 -6.78 10.27 -359,450 4,941,452
2020-06-29 2020-06-26 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -15,000 516,154 -2.82 6.68 -100,200 3,447,909
2020-06-26 2020-06-25 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -40,000 531,154 -7.00 6.61 -264,400 3,510,928
2020-06-26 2020-06-24 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -50,000 571,154 -8.05 6.94 -347,000 3,963,809
2020-06-24 2020-06-23 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -46,912 621,154 -7.02 7.23 -339,174 4,490,943
2020-06-24 2020-06-22 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -44,714 668,066 -6.27 6.86 -306,738 4,582,933
2020-04-27 2020-04-23 4 SSD Simpson Manufacturing Co., Inc.
Common Stock
A - Award 1,272 5,837 27.86
2020-03-26 2020-03-24 4 CENX CENTURY ALUMINUM CO
Common Stock
F - Taxes -70,832 712,780 -9.04 3.67 -259,953 2,615,903
2020-03-26 2020-03-24 4 CENX CENTURY ALUMINUM CO
Common Stock
A - Award 159,891 783,612 25.64
2020-02-14 2019-10-25 5 SSD Simpson Manufacturing Co., Inc.
Common Stock
L - Other 10 4,565 0.22 75.51 755 344,703
2020-02-14 2019-07-26 5 SSD Simpson Manufacturing Co., Inc.
Common Stock
L - Other 12 4,555 0.26 65.50 786 298,352
2020-02-14 2019-04-26 5 SSD Simpson Manufacturing Co., Inc.
Common Stock
L - Other 8 4,543 0.18 62.15 497 282,347
2020-02-14 2019-01-25 5 SSD Simpson Manufacturing Co., Inc.
Common Stock
L - Other 7 4,535 0.15 60.94 427 276,363
2020-01-03 2020-01-01 4 CENX CENTURY ALUMINUM CO
Common Stock
A - Award 99,857 623,721 19.06
2020-01-03 2019-12-31 4 CENX CENTURY ALUMINUM CO
Common Stock
F - Taxes -25,388 523,864 -4.62 7.76 -197,011 4,065,185
2019-12-30 2019-12-26 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -25,000 549,252 -4.35 7.55 -188,750 4,146,853
2019-12-26 2019-12-23 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -25,000 574,252 -4.17 7.56 -189,000 4,341,345
2019-11-12 2019-11-08 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -50,000 599,252 -7.70 8.26 -413,000 4,949,822
2019-04-30 2019-04-26 4 SSD SIMPSON MANUFACTURING CO INC /CA/
Common Stock
A - Award 1,582 4,495 54.31
2019-03-25 2019-03-25 4 CENX CENTURY ALUMINUM CO
Common Stock
F - Taxes -189,483 649,252 -22.59 8.23 -1,559,445 5,343,344
2019-03-25 2019-03-25 4 CENX CENTURY ALUMINUM CO
Common Stock
A - Award 427,723 838,735 104.07
2019-03-25 2019-03-21 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -25,000 411,012 -5.73 8.96 -224,000 3,682,668
2019-01-03 2019-01-01 4 CENX CENTURY ALUMINUM CO
Common Stock
A - Award 90,597 436,012 26.23
2019-01-03 2018-12-31 4 CENX CENTURY ALUMINUM CO
Common Stock
F - Taxes -34,458 345,415 -9.07 7.31 -251,888 2,524,984
2018-04-26 2018-04-24 4 SSD SIMPSON MANUFACTURING CO INC /CA/
Common Stock (RSU awarded April 24, 2018)
A - Award 1,475 1,475 55.34 81,626 81,626
2018-03-27 2018-03-26 4 CENX CENTURY ALUMINUM CO
Common Stock
A - Award 9,666 379,873 2.61
2018-03-16 2018-03-16 4 CENX CENTURY ALUMINUM CO
Common Stock
G - Gift -1,100 370,207 -0.30
2018-01-03 2018-01-02 4 CENX CENTURY ALUMINUM CO
Common Stock
A - Award 40,640 371,307 12.29
2018-01-03 2017-12-31 4 CENX CENTURY ALUMINUM CO
Common Stock
F - Taxes -16,667 330,667 -4.80 19.64 -327,340 6,494,300
2017-10-18 3 CNA CNA FINANCIAL CORP
Common Stock
0
2017-05-26 2017-05-25 4 CENX CENTURY ALUMINUM CO
Employee Stock Option (Right to Buy)
A - Award 27,618 0 -100.00
2017-05-26 2017-05-25 4 CENX CENTURY ALUMINUM CO
Common Stock
S - Sale -27,618 347,334 -7.37 14.88 -410,956 5,168,330
2017-05-26 2017-05-25 4 CENX CENTURY ALUMINUM CO
Common Stock
M - Exercise 27,618 374,952 7.95 6.55 180,898 2,455,936
2017-05-16 2017-05-16 4 SSD SIMPSON MANUFACTURING CO INC /CA/
Common Stock (RSU awarded May 16, 2017)
A - Award 1,438 1,438 41.52 59,706 59,706
2017-05-01 2017-04-28 4 CENX CENTURY ALUMINUM CO
Common Stock
G - Gift -8,000 347,334 -2.25
2017-01-04 2017-01-01 4 CENX CENTURY ALUMINUM CO
Common Stock
A - Award 57,309 355,334 19.23
2017-01-04 2016-12-31 4 CENX CENTURY ALUMINUM CO
Common Stock
F - Taxes -19,268 298,025 -6.07 8.56 -164,934 2,551,094
2016-03-24 2016-03-22 4 CENX CENTURY ALUMINUM CO
Common Stock
A - Award 77,782 317,293 32.48
2016-01-04 2015-12-31 4 CENX CENTURY ALUMINUM CO
Common Stock
F - Taxes -20,678 239,511 -7.95 4.42 -91,397 1,058,639
2015-04-03 2015-04-01 4 CENX CENTURY ALUMINUM CO
Common Stock
F - Taxes -64,379 260,189 -19.84 14.12 -909,031 3,673,869
2015-04-03 2015-04-01 4 CENX CENTURY ALUMINUM CO
Common Stock
A - Award 150,967 324,568 86.96
2015-03-25 2015-03-23 4 CENX CENTURY ALUMINUM CO
Common Stock
A - Award 35,536 173,601 25.74
2015-01-05 2014-12-31 4 CENX CENTURY ALUMINUM CO
Common Stock
F - Taxes -17,387 138,065 -11.18 24.40 -424,243 3,368,786
2014-03-26 2014-03-24 4 CENX CENTURY ALUMINUM CO
Common Stock
A - Award 42,161 155,452 37.21
2014-01-02 2013-12-31 4 CENX CENTURY ALUMINUM CO
Common Stock
F - Taxes -4,184 113,291 -3.56
2013-03-21 2013-03-19 4 CENX CENTURY ALUMINUM CO
Common Stock
A - Award 45,246 117,475 62.64
2013-03-21 2013-03-19 4 CENX CENTURY ALUMINUM CO
Common Stock
A - Award 37,834 72,229 110.00
2013-01-03 2012-12-31 4 CENX CENTURY ALUMINUM CO
Common Stock
F - Taxes -5,579 34,395 -13.96
2010-03-24 2010-03-22 4 CENX CENTURY ALUMINUM CO
Common Stock
A - Award 11,950 95,611 14.28
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)