Friday 6/28 Insider Buying Report: BSTZ, TGTX (6/28, 10:52 AM ET) -- As the saying goes, there are many possible reasons for an insider to sell a stock, but only one reason to buy — they expect to make money. So let's look at two noteworthy recent insider buys.

On Tuesday, Blackrock Science and Technology Trust II (BSTZ)'s , Tony Kim, made a $540,000 purchase of BSTZ, buying 27,000 shares at a cost of $20.00 a piece. So far Kim is in the green, up about 0.4% on their purchase based on today's trading high of $20.09. Blackrock Science and Technology Trust II is trading up about 0.1% on the day Friday. This buy marks the first one filed by Kim in the past year.

And at TG Therapeutics (TGTX), there was insider buying on Wednesday, by CEO and President Michael S. Weiss who bought 50,000 shares for a cost of $7.04 each, for a trade totaling $351,750. TG Therapeutics is trading up about 0.2% on the day Friday. Weiss was up about 14.7% on the buy at the high point of today's trading session, with TGTX trading as high as $8.07 at last check today.

For MarketNewsVideo.com, I'm Sayoko Murase.