The relationship between Chubb and the Sun Insurance Companies dates to at least the early 1960s. Sun Indemnity of New York/Sun Insurance Company of New York became Chubb Indemnity in the early 1990s. See January 8, 2010's blog entry for some background.
Here is an excerpt of a 1960s American Insurance Association membership list. Sun Insurance Company of New York (now Chubb Indemnity) and Sun Insurance Office Ltd. were indicated to be affiliated with Chubb.
In addition, in 1980 the asbestos manufacturer Johns-Manville sued some of their insurers and served Chubb with a lawsuit that named Sun Insurance Office Ltd. of Canada. This April 9, 1980 letter discusses Chubb's receipt of the lawsuit. In an April 1980 memorandum, a Johns Manville employee states that an insurance expert he met with in March 1980 said that Chubb manages Sun in the United States.
Chubb Denies Relationship With Sun
On the afternoon of October 22, 2009, oral argument took place at the United States Court of Appeals for the Second Circuit in New York City on issues that arose in part from the Johns Manville bankruptcy. The appeal involves Chubb Indemnity. The attorney for Chubb Indemnity made the following statements to the justices of the Second Circuit:
"The response to that is that Chubb Indemnity Insurance Company, the appellant here, is not Chubb Corporation. Number one. Chubb Indemnity Insurance Company’s a subsidiary of Federal, which is a subsidiary of Chubb Corporation. Perhaps more significantly, until 1992, Chubb Indemnity Insurance Company had no relationship whatsoever with Chubb.”
A justice on the Second Circuit then asked, "So in 1986 there was no relationship?"
The attorney for Chubb Indemnity replied, "Correct, Sir."