S-8

NTIC Northern Technologies International Corp.

28 Jan 19

Registration of securities for employees

S-3

NTIC Northern Technologies International Corp.

5 Dec 12

Shelf registration

S-8 POS

NTIC Northern Technologies International Corp.

3 Feb 12

Registration of securities for employees (post-effective amendment)

S-8

NTIC Northern Technologies International Corp.

24 Jan 11

Registration of securities for employees

S-8 POS

NTIC Northern Technologies International Corp.

23 Nov 10

Registration of securities for employees (post-effective amendment)

424B5

NTIC Northern Technologies International Corp.

18 Sep 09

Prospectus supplement for primary offering

8-A12B/A

NTIC Northern Technologies International Corp.

11 Sep 09

Registration of securities on exchange (amended)

S-3/A

NTIC Northern Technologies International Corp.

15 Jan 09

Shelf registration (amended)

S-3

NTIC Northern Technologies International Corp.

7 Oct 08

Shelf registration

25

NTIC Northern Technologies International Corp.

27 Jun 08

Voluntary exchange delisting

8-A12B

NTIC Northern Technologies International Corp.

26 Jun 08

Registration of securities on exchange

S-8

NTIC Northern Technologies International Corp.

26 Jan 07

Registration of securities for employees

S-8

NTIC Northern Technologies International Corp.

26 Jan 07

Registration of securities for employees

S-8

NTIC Northern Technologies International Corp.

15 Mar 00

Registration of securities for employees