Question: Which production studio did the Wachowskis present their script for Assassins to?
About the article "The Matrix", section "Development".

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The original spec screenplay was written by Lana and Andy Wachowski and sold for a million dollars to producer Joel Silver around the same time he bought their script for "The Matrix", also for a million dollars.
The script was similar to the final product, but with a more developed love story between Rath and Electra and a briefer ending without the character of Nicolai.
Joel Silver offered Richard Donner $10 million to direct, but Donner insisted the script be rewritten to tone down the violence and make the central character more sympathetic and brought in Brian Helgeland, who did a page one rewrite and earned a co-screenwriter credit.
The Wachowskis attempted to remove their name from the film but were refused by the Writers Guild of America.
Later, after watching "Bound", Joel Silver apologized to the brothers over "Assassins" and offered them the chance to direct their script "The Matrix". 
Early work.
Prior to working in the film industry, the Wachowskis wrote comic books for Marvel Comics' Razorline imprint, namely "Ectokid" (created by horror novelist Clive Barker) in 1993 as well as writing for Epic Comics' "Clive Barker's Hellraiser" and "Clive Barker's Nightbreed" comic series.
In the mid-1990s they branched out into film writing, creating the script for "Assassins" in 1994.
Warner Brothers bought the script and included two more pictures in contract.
"Assassins" was "totally rewritten" by Brian Helgeland; the Wachowskis tried to remove their names from the film but failed.
They then moved on to their next project, the neo-noir thriller "Bound", their debut as directors.
The film was well received for its style and craft, and was noted as one of the first mainstream films to prominently feature a homosexual relationship without it being central to the plot.
Taking advantage of the positive buzz, the Wachowskis asked to direct their next picture, "The Matrix". 
In 1994, the Wachowskis presented the script for the film "Assassins" to Warner Brothers.
After Lorenzo di Bonaventura, the president of production of the company at the time, read the script, he decided to buy rights to it and included two more pictures, "Bound" and "The Matrix", in the contract.
The first movie the Wachowskis directed, "Bound", then became a critical success.
Using this momentum, the brothers later asked to direct "The Matrix".
Producer Joel Silver soon joined the project.
Although the project had key supporters like Silver and Di Bonaventura to influence the company, "The Matrix" was still a huge investment for Warner Bros, which had to invest $60 million to create a movie with deep philosophical ideas and difficult special effects.
The Wachowskis therefore hired underground comic book artists Geof Darrow and Steve Skroce to draw a 600-page, shot-by-shot storyboard for the entire film.
The storyboard eventually earned the studio's approval, and it was decided to film in Australia to make the most of the budget.
Soon, "The Matrix" became a co-production of Warner Bros. and the Australian company Village Roadshow Pictures.
"Ninja Assassin" was directed by James McTeigue, and produced by Joel Silver and the Wachowskis.
The project was inspired by the ninja scenes featured in the Wachowskis' 2008 film "Speed Racer", in which the actor Rain had impressed the Wachowskis with his portrayal as a fighter.
The Wachowskis were dissatisfied with the original script, and hired J. Michael Straczynski to write a new draft for the film six weeks before it began production.
Medienboard Berlin-Brandenburg provided filmmakers US$1 million in funding, and Germany's Federal Film Fund provided an additional US$9 million to the film's funding. 
During "The Matrix Reloaded", "The Matrix Revolutions", "Animatrix" and "Enter the Matrix" production, the Wachowskis created EON Entertainment (not to be confused with Eon Productions), their production company to coordinate and direct all involved partners.
It is also where the films were edited together, after the various FX vendors sent their finished work.
EON's internal VFX team, ESC, did a number of visual effect shots for the two Matrix sequels and coordinated the other vendors.
ESC was shut down in summer 2004.
Anarchos Productions (credited in "Cloud Atlas" as Anarchos Pictures) is their production company that has been billed for all their films starting with "V for Vendetta", but EON is still being mentioned at the production credits of their latest film, "Cloud Atlas".
"Kinowerks" is their postproduction and effects studio, based in Ravenswood, Chicago.
It has been acclaimed for its green-friendly design.
Roger Ebert was invited to watch a restored print of "The Godfather" in the "Kinowerks" facilities and met the Wachowskis, but he was oblivious to the fact the studio belonged to them.
The "Chicago Tribune"'s Christopher Pirelli has interviewed the Wachowskis in the facility but was instructed to keep its exact location a secret, as the filmmakers want to avoid having fans showing up on the front door.
Prior to working in the film industry, the Wachowskis wrote comic books for Marvel Comics' Razorline imprint, namely "Ectokid" (created by horror novelist Clive Barker) in 1993 as well as writing for Epic Comics' "Clive Barker's Hellraiser" and "Clive Barker's Nightbreed" comic series.
In 2003, they created Burlyman Entertainment and have released comic books based on "The Matrix" as well as two original bi-monthly series:  "Shaolin Cowboy" – created, written, and art by Geof Darrow (the Wachowskis contributed the opening dialogue to each issue)  "Doc Frankenstein" – created by Geof Darrow and Steve Skroce, written by the Wachowskis, with art by Skroce.