Why insider trading matters?

Numerous studies have examined whether there is evidence that U.S. insiders systematically trade on private information despite the legal deterrence. The consensus appears to be that insider purchases (but not sales) tend to be followed by positive abnormal stock price performance, particularly for small growth stocks.

- Prof. B. Espen Eckbo, Dartmouth College
The Liberty SiriusXM Group (LSXMA)
Sector: Communication Services; Industry: Broadcasting

Formula One Group operates in the motorsports business. Formula One Group operates as a subsidiary of Liberty Media Corporation.


Trade Date Insider Title Buy/Sell #Shares Price Value Option
2021-12-02 MALONE JOHN C Chairman of the Board Sell 399,000 $50.30 $20,068,668 No
2021-11-09 RAPLEY DAVID E Director Sell 3,872 $53.61 $207,585 Yes
2021-11-01 BERKSHIRE HATHAWAY INC 10%-Owner Buy 5,347,320 $50.02 $267,449,418 No
2021-11-01 WESCHLER, R. TED Member of 10% owner group Buy 5,347,320 $50.02 $267,449,418 No
2021-08-31 ROSENTHALER ALBERT E Chief Corp. Dev. Officer Sell 11,816 $25.77 $304,520 Yes
2021-08-30 Wendling Brian J CAO/PFO Sell 12,215 $49.59 $605,784 Yes
2021-08-18 Wendling Brian J CAO/PFO Sell 11,405 $48.00 $547,440 Yes
2021-07-02 GAMCO INVESTORS, INC. ET AL 10%-Owner Buy 100 $27.92 $2,792 No
2021-06-04 MALONE JOHN C Chairman of the Board Sell 51,500 $44.13 $2,272,700 No
2021-06-04 MALONE JOHN C Chairman of the Board Sell 51,500 $44.13 $2,272,700 No
2021-05-10 GAMCO INVESTORS, INC. ET AL 10%-Owner Sell 2,000 $27.40 $54,793 No
2021-03-09 Wendling Brian J CAO/PFO Sell 16,317 $43.10 $703,199 No
2021-03-04 RAPLEY DAVID E Director Sell 1,125 $44.16 $49,677 No
2021-02-17 GAMCO INVESTORS, INC. ET AL 10%-Owner Sell 1,000 $28.48 $28,480 No
2020-12-03 MALONE JOHN C Chairman of the Board Sell 60,302 $41.52 $2,503,582 No
2020-12-02 MALONE JOHN C Chairman of the Board Sell 104,571 $41.31 $4,319,638 No
2020-11-30 MALONE JOHN C Chairman of the Board Sell 65,935 $41.52 $2,737,305 No
2020-11-25 MALONE JOHN C Chairman of the Board Sell 143,884 $42.22 $6,075,021 No
2020-11-23 MALONE JOHN C Chairman of the Board Sell 360,724 $39.01 $14,073,561 No
2020-11-19 MALONE JOHN C Chairman of the Board Sell 349,584 $39.12 $13,675,525 No
2020-08-13 RAPLEY DAVID E Director Sell 2,021 $36.10 $72,958 No
2020-07-21 GAMCO INVESTORS, INC. ET AL 10%-Owner Buy 600 $19.58 $11,751 No
2020-07-15 GAMCO INVESTORS, INC. ET AL 10%-Owner Buy 7,694 $18.27 $140,552 No
2020-06-18 MALONE JOHN C Chairman of the Board Sell 500,000 $36.21 $18,104,167 No
2020-06-05 Ancient Art, L.P. 10%-Owner Sell 50,000 $35.84 $1,791,930 No
2020-06-03 Ancient Art, L.P. 10%-Owner Sell 7,304 $35.69 $260,697 No
2020-06-01 WESCHLER, R. TED Member of 10% owner group Buy 450,000 $37.35 $16,807,500 No
2020-06-01 BERKSHIRE HATHAWAY INC 10%-Owner Buy 450,000 $37.35 $16,807,500 No
2020-05-29 WESCHLER, R. TED Member of 10% owner group Buy 2,374,180 $36.15 $85,824,685 Yes
2020-05-29 BERKSHIRE HATHAWAY INC 10%-Owner Buy 2,374,180 $36.15 $85,824,685 Yes

Insider Smart

PENN NATIONAL GAMING INC (PENN) - PENN took a deep dive from $36 to $5 due to the crash, anyone who was bold enough to pick up some shares in March or April could have made a 900% profit in 2 months. But bottom fishing is always easier said than done, if one took a safer bet and followed multiple insider buying around $18, a 100% profit is still impressive.

Insider Smart

SYSCO CORP (SYY) - PELTZ NELSON and Frank Joshua D are insiders of SYSCO CORP, check their transactions to see how they sell high and buy low. Would that be more persuasive than just buy or sell?