Mr Dalgleish exercised 334,000 vested options last week, at a cost of $130,260.
He simultaneously sold 41,352 shares on-market at $3.15 per share, so that the net cost of the exercise was zero.
The company said the 292,648 shares he acquitted at zero cost (in net terms) were worth $921,841, based on the prevailing share price.
In tandem with these transactions, Mr Dalgleish sold 83,657 shares at a price of $3.22 per share to fully discharge a margin loan over shares registered in the name of UBS Wealth Management Nominees.
Mr Dalgleish undertook similar exercised last September and October, when he acquired shares worth about $10 million at zero cost.
After the latest transactions, Mr Dalgleish holds 5.5 million RCR Tomlinson shares valued at $17.3 million.
He also holds 1.8 million performance rights and 1.4 million share options, subject to predefined performance hurdles.
Mr Dalgleish was granted a total of 8 million options when he joined RCR, with the exercise price of 39 cents based on the prevailing share price when he commenced in May 2009.