Grips - holding the blade

Firstly, there is no right or wrong way to throw a knife or other pointed object. If you can throw it accurately, comfortably and with minimum effort then chances are you have found your style. If you haven't then perhaps you'll find an option here that will make it easy for you to do so.

The GRIP is one of the four basics of throwing. The others are STANCE, POWER and STYLE of throw.

Gripping a throwing knife 1 A. This is the side pinch that a lot of throwers use. It seems to be an instinctive grip. Always try to hold the knife at exactly the same point of the knife for every throw. If not then you will be throwing at various lengths of knife. This will affect your performance.
Gripping a throwing knife 2 B. The thumb is on top and is a difficult grip to master from the start. But quite a few top throwers use this style and maintain that you can get a lot more accuracy from it.
Gripping a throwing knife 3 C. This is the bouquet grip. So called because it is like holding a bouquet of flowers. With this grip you can positively hold the knife and provide a smooth follow through. But you are shortening the spin of the knife as you are holding a lot more of it in your hand, compared with the two above. You may have to stand slightly forward to compensate for this.
Gripping a throwing knife 4 D. This is used for the underhand throw, as opposed to the overhand throw for the three grips above. The knife is held horizontal to the target and is allowed to flow out of the hand, like loosing a ball underhand. This grip is good for some fun and fine tuning of your release of the knife. Don't expect a lot of power to be in this grip/ throw. If you time your release and power right you can make half spins some distance from the target.
Gripping a throwing knife 7 E. This is called choking the knife. You are actually altering where you hold the knife and this alters the length of the knife, when it is thrown. By choking back as in the 1st photograph above ( thumb grip ) you are lengthening your knife and will have to stand back from your usual throwing distance. The other photograph ( side pinch - image b) achieves the opposite effect.
Gripping a throwing knife 9 F. Choked grip with thumb on top.
Gripping a throwing knife 8 G. This is the military throw, so called because it is to be used with bayonets, which usually have one side sharpened. With practice the length of a half spin, with this grip, can be extended to easily 20'. By releasing far more earlier than usual, that is, behind your head with an overhand throw, you can control the spin of the bayonet and slow it right down.
Gripping a throwing knife 10 H. Forward choking of the thumb grip
Gripping a throwing knife 6 I. Extended choke grip with thumb on top

The same grips can be used when thrown by the handle.
Experiment with all these grips. When you find the one that seems natural to you, stick with it !!!