Whether you're feeling patriotic -- or perhaps even a tad bit jingoistic -- after yesterday's Independence Day holiday, there's another reason for investors to be in the black when it comes to the red, white, and blue.

Most of last quarter's hottest IPOs were American companies. In fact, the six best performers were stateside debutantes.

Let's go over the names.

Company

Date

Offer

June 30

Gain

LinkedIn (NYSE: LNKD)

May 19

$45.00

$90.09

100%

Sagent Pharmaceuticals (Nasdaq: SGNT)

April 20

$16.00

$26.98

69%

Fusion-io (NYSE: FIO)

June 9

$19.00

$30.09

58%

Responsys (Nasdaq: MKTG)

April 21

$12.00

$17.73

48%

RPX (Nasdaq: RPXC)

May 4

$19.00

$28.03

48%

HomeAway (Nasdaq: AWAY)

June 29

$27.00

$38.70

43%

Source: Dealogic.

This was during the same quarter that Russian dot-com darling Yandex (Nasdaq: YNDX) went public. There was no shortage of other international players seeking listings on American exchanges. However, these homegrown names clocked in with the biggest gains by the end of the quarter last week.

The big winners don't have a central theme beyond the shared citizenry.

LinkedIn mans a fast-growing social networking website for career-minded professionals. Sagent is a drugmaker specializing in injectable generics. Fusion-io is introducing a new data storage platform. Responsys offers email and cross-channel marketing solutions. RPX provides patent risk management solutions on a subscription basis. HomeAway allows vacation property owners the ability to rent out their digs to travelers who need more space than a cramped hotel room.

This feat is unlikely to repeat itself in the third quarter, despite some prolific names in the pipeline. Chinese IPOs are racing back into fancy after getting slammed through mid-June, and a few other international darlings may come through with strong introductions on this side of the Atlantic.

It's a small, small world -- but one with potentially big, big gains.

Which of this past quarter's IPOs got your attention? Share your thoughts in the comment box below.