(Sharecast News) - Two of the companies disclosing director share transactions to markets in London on Thursday involved insiders at SigmaRoc and Sainsbury's.

At AIM-quoted SigmaRoc, non-executive director Tim Hall exercised 750,000 share options granted under the company's 2016 share option plan.

The options were exercised on a cashless basis at 46p per share, resulting in a net transfer of 226,834 shares from the company's employee benefit trust.

Separately, Hall also purchased 80,884 shares at a market price of 103.25p each.

Following the transactions, his total holding in SigmaRoc stood at 750,000 shares, representing 0.067% of the issued share capital.

Meanwhile, J Sainsbury chief executive officer Simon Roberts exercised 994,658 nil-cost options under the group's 2016 long-term incentive plan, originally awarded in May 2020.

To settle tax obligations arising from the award, Roberts sold 468,427 shares at 276.86p, generating proceeds of £1.3m.

He retained 526,231 shares following the transaction.

At 1610 BST, shares in SigmaRoc were down 0.19% at 103p, while those in J Sainsbury were off 0.26% at 276.88p.

Reporting by Josh White for Sharecast.com.

Top Director Buys

Sigmaroc (SRC)

Director name: Hall,Tim

Amount purchased: 80,884 @ 103.25p

Value: £83,512.73

Wheaton Precious Metals Corp.npv (cdi) (WPM)

Director name: Brack,George L.

Amount purchased: 370 @ $51.36

Value: $11,242.50

Top Director Sells

Sainsbury (j) (SBRY)

Director name: Roberts,Simon

Amount sold: 468,427 @ 276.86p

Value: £1,296,886.99

Diaceutics (DXRX)

Director name: Keeling,Peter

Amount sold: 500,000 @ 126.00p

Value: £630,000.00

Wheaton Precious Metals Corp.npv (cdi) (WPM)

Director name: Brack,George L.

Amount sold: 370 @ $108.52

Value: $33,109.92