KLA-Tencor

(KLAC) - Get Report

says it still wants to buy

August Technology

(AUGT)

and, to prove it, the equipment company has snapped up 4.2% of August's outstanding stock on the open market.

KLA-Tencor on late Tuesday repeated its $11.50-a-share cash takeover offer for August, which currently has an agreement to merge with

Nanometrics

(NANO) - Get Report

, as well as another takeover offer from

Rudolph Technologies

(RTEC) - Get Report

. All three companies make tools used to manufacture semiconductors.

On Monday, August

entered into a confidentiality agreement with Rudolph to further discuss Rudolph's bid of $2.10 a share in cash, up to $40 million, and 0.4955 a share of Rudolph stock, which values August at $9.40 a share.

August shares closed on Tuesday at $11.99, which makes Rudolph's bid a 22% discount to its current price. August also trades at a discount to its stock-swap agreement with Nanometrics.

The lack of a confidentiality agreement with Rudolph had been

a pivotal obstacle keeping Rudolph from getting a closer look at August's internal operations and financial results. KLA-Tencor too wants to sign a similar term sheet.

"KLA-Tencor remains willing to enter into a confidentiality agreement with August that would not restrict KLA-Tencor's ability to make superior proposals directly to August's shareholders," said the company in a statement. KLA-Tencor says it is still willing to consider the use of its stock as currency to buy out August.

Based on August's current trading price, a 4.2% stake would cost roughly $9 million and amount to almost 750,000 shares.