Attorney RecordSan Francisco County
John Michael Grenfell · California Lawyer
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John Michael Grenfell is on California’s State Bar roll, #88500, admitted in 1979; license status: active as of 22 July 2026. The address of record is in San Francisco, San Francisco County. Practice areas listed in the registry: Business Law and Litigation. 21 case appearances are listed on this profile. Registry record updated 19 October 2026; license information comes from the State Bar.
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The record
| State Bar number | #88500 |
|---|---|
| License status | Active |
| Admitted | 1979 |
| Law school | Harvard Univ Law School |
| Firm | Pillsbury Winthrop Shaw Pittman LLP |
| Location | San Francisco, San Francisco County |
| Registry identity | Official State Bar record |
Diamond members practicing Business Law in San Francisco County
Practice areas
Practice areas are self-reported to the State Bar or added by the attorney; listing one is not a State Bar certification.
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Cases of record
From published opinions naming this attorney as counsel. The attorney has not yet confirmed these records.
| Case | Appeared for | Citation | Court | Decided |
|---|---|---|---|---|
| Allan Diamond v. Hogan Lovells US | Counsel for the respondent | 883 F.3d 1140 | U.S. Court of Appeals for the Ninth Circuit | 27 February 2018 |
| Avidity Partners v. State of California | Counsel for the appellant | 221 Cal. App. 4th 1180 | California Court of Appeal | 4 December 2013 |
| In Re Tft-Lcd (Flat Panel) Antitrust Litigation | Counsel for the defendant | 822 F. Supp. 2d 953 | U.S. District Court, Northern District of California | 5 October 2011 |
| Washington v. Chimei Innolux Corp. | Counsel for the appellant | 659 F.3d 842 | U.S. Court of Appeals for the Ninth Circuit | 3 October 2011 |
| In Re Tft-Lcd (Flat Panel) Antitrust Litigation | Counsel for the defendant | 820 F. Supp. 2d 1055 | U.S. District Court, Northern District of California | 26 September 2011 |
| Voices of the Wetlands v. State Water Resources Control Board | Counsel for the appellant | 52 Cal. 4th 499 | California Supreme Court | 15 August 2011 |
| Multiut Corp. v. Dynegy, Inc. | Counsel for the respondent | 263 F. App'x 590 | U.S. Court of Appeals for the Ninth Circuit | 10 January 2008 |
| Western States Wholesale Natural Gas Antitrust Litigation v. AEP Energy Services, Inc. | Counsel for the respondent | 243 F. App'x 328 | U.S. Court of Appeals for the Ninth Circuit | 24 September 2007 |
| Wholesale Electricity Antitrust Cases I & II | Counsel for the respondent | 147 Cal. App. 4th 1293 | California Court of Appeal | 26 February 2007 |
| State v. Altus Finance, S.A. | Counsel for the respondent | 36 Cal. 4th 1284 | California Supreme Court | 15 August 2005 |
| Global Health Sciences Creditor Trust v. Marconi (In re Global Health Sciences, Inc.) | Counsel for the appellant | 122 F. App'x 386 | U.S. Court of Appeals for the Ninth Circuit | 25 February 2005 |
| Global Health Sciences Creditor Trust v. Marconi | Counsel for the appellant | 122 F. App'x 386 | U.S. Court of Appeals for the Ninth Circuit | 25 February 2005 |
| California ex rel. Lockyer v. Dynegy, Inc. | Counsel for the respondent | 387 F.3d 966 | U.S. Court of Appeals for the Ninth Circuit | 29 October 2004 |
| Public Utility District No. 1 of Snohomish County v. Dynegy Power Marketing, Inc. | Counsel for the respondent | 384 F.3d 756 | U.S. Court of Appeals for the Ninth Circuit | 10 September 2004 |
| California ex rel Lockyer v. Dynegy, Inc. | Counsel for the respondent | 375 F.3d 831 | U.S. Court of Appeals for the Ninth Circuit | 6 July 2004 |
| Bowoto v. Chevron Texaco Corp. | Counsel for the defendant | 312 F. Supp. 2d 1229 | U.S. District Court, Northern District of California | 22 March 2004 |
| T & E Pastorino Nursery v. Duke Energy Trading & Marketing, L.L.C. | Counsel for the defendant | 268 F. Supp. 2d 1240 | U.S. District Court, Southern District of California | 19 May 2003 |
| Lane v. Residential Funding Corp. | Counsel for the respondent | 323 F.3d 739 | U.S. Court of Appeals for the Ninth Circuit | 13 March 2003 |
| Twohey v. Lincoln National Life Insurance | Counsel for the respondent | 273 F.3d 817 | U.S. Court of Appeals for the Ninth Circuit | 5 December 2001 |
| De Saracho v. Custom Food Machinery, Inc. | Counsel for the defendant | 182 F.R.D. 601 | U.S. District Court, Northern District of California | 16 September 1998 |
| Morton P. MacLeod v. County of Santa Clara | Counsel for the appellant | 749 F.2d 541 | U.S. Court of Appeals for the Ninth Circuit | 10 December 1984 |
Appearances in published opinions, drawn from public court records. Cases of record are matters of public record and are not a representation of results; past results do not guarantee a similar outcome. Legal information, not legal advice.
Each case name opens the published opinion it comes from. Is a case not this attorney’s? The attorney can claim this profile and mark it as not theirs, which removes it from this page; anyone can report an error through Help & Support.
On the official record
The employer on the official record is Pillsbury Winthrop Shaw Pittman LLP.
A firm or employer website answers at pillsburylaw.com, the domain of the email address on the State Bar record.
The law school on the record is Harvard University Law School.
Admitted to the California Bar in 1979 · 47 years on the roll.
Practice areas on the record: Business Law and Litigation.
21 appearances as counsel in published opinions are on this record.
The address of record is in San Francisco, in San Francisco County, where matters are ordinarily heard at the Superior Court of California, County of San Francisco, seated at San Francisco.
Confirm John Michael Grenfell’s license status, bar number #88500, and official disciplinary or administrative history directly with the State Bar of California at apps.calbar.ca.gov before retaining counsel. This profile does not reproduce the complete official history; missing information does not mean no discipline. This page indexes public-record data and identifies verified claims; it does not rate attorney quality or predict results.
Legal information, not legal advice.
On the record nearby
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