California Cartwright Act antitrust Bus. & Prof. Code § 16750 attorney fee petition mechanics: date of last overt act in antitrust conspiracy as primary Welch anchor (the ONLY primary anchor in the fee-petition-mechanics series in a COVERT MARKET COMPETITION DATE — embedded in defendants' private bid submission records, price-fixing communications, and customer allocation records and accessible only through civil discovery or government CID production), § 16750(a) mandatory treble damages plus mandatory attorney fees, § 16750(b) indirect purchaser standing rejecting Illinois Brick, concurrent FTC CID calendar, DOJ Antitrust Division CID plus criminal prosecution calendar, California AG parens patriae calendar, JPML MDL Panel transfer calendar for concurrent Sherman Act claims, and Hensley Ketchum/Dague split between Cartwright Act California multiplier and Sherman Act federal no-multiplier fee petition advisory

The DATE OF LAST OVERT ACT identification and § 16750.1 limitations analysis and § 16750(b) indirect purchaser standing advisory call cycle at the COVERT MARKET COMPETITION DATE: 5.39 untracked hours = $1,617–$2,695/year

The DATE OF LAST OVERT ACT IN ANTITRUST CONSPIRACY — the most recent affirmative act taken by any defendant in furtherance of the price-fixing, bid-rigging, or market-allocation conspiracy — is the primary Welch temporal anchor for California Cartwright Act antitrust attorney fee billing documentation. California Cartwright Act practice is the ONLY practice area in the fee-petition-mechanics series where the primary Welch anchor is in a COVERT MARKET COMPETITION DATE. To understand why this anchor is institutionally unique, it is necessary to examine what the DATE OF LAST OVERT ACT is, where it resides, and why it differs from every other document or date that generates a primary anchor in the fee-petition-mechanics series.

The DATE OF LAST OVERT ACT IN ANTITRUST CONSPIRACY is an affirmative step taken by a defendant in furtherance of the unlawful horizontal conspiracy — the last bid submitted at a rigged price, the last price-fixing agreement confirmed in an internal communication, the last customer allocation territory assignment recorded in the defendants' sales management systems, the last meeting at which the conspirators confirmed their collective price floor. This date is not recorded in any public document. It is not filed with any court. It is not reported to any government agency at the time of the act. It is not communicated to the plaintiff-market participant or to any consumer. It exists exclusively in the defendants' own internal business records: bid submission timestamps in the defendants' procurement software, internal email chains confirming price adjustments, territory allocation records in the defendants' customer relationship management systems, internal meeting minutes from sales conferences or trade association meetings at which the conspiracy was maintained. At the moment the solo Cartwright Act plaintiff retains counsel, this date is in the defendants' possession and absent from the plaintiff's. It becomes accessible to the plaintiff only through: (a) civil discovery in the § 16750 action — specifically, production of the defendants' internal documents in response to requests for production targeting the conspiracy's dates of operation; (b) government CID document production — when the FTC or DOJ Antitrust Division compels production of the conspiracy documents through a CID and then publicly discloses those documents in a consent decree appendix, a criminal information factual basis, or a plea agreement statement of facts; or (c) whistleblower disclosure — when an insider provides documents corroborating the conspiracy's dates of operation before civil discovery commences.

This structural characteristic — the primary anchor date is known to the defendants and unknown to the plaintiff at engagement inception — is unique in the entire fee-petition-mechanics series. Every other primary anchor in the series is known to the plaintiff at or before the time of engagement: the California Superior Court complaint filing date (the plaintiff files it and knows the date); the DLSE ODA wage claim case number (the plaintiff files the claim and receives the case number); the CRD FEHA administrative complaint case number (the plaintiff files the complaint and receives the case number); the § 1785.16 consumer credit report dispute letter (the consumer writes and sends it and knows the date); the § 123111 written medical records request (the patient writes and delivers it and knows the date); the § 910 SB 800 homeowner written notice of defect (the homeowner authors and delivers it and knows the date); the § 1950.5 lease vacate date (the tenant participates and knows when they vacated); the § 2775 IC agreement date (both parties sign and both know the execution date); the § 17529.5 spam email received timestamp (visible in the plaintiff's email client at receipt). Only the DATE OF LAST OVERT ACT IN ANTITRUST CONSPIRACY is determined retroactively through adversarial litigation rather than known to the plaintiff at the moment of engagement.

Bus. & Prof. Code § 16750.1 provides the four-year limitations period for California Cartwright Act civil actions: 'Any cause of action under Section 16750 shall be barred unless commenced within four years after the cause of action accrued.' Under the continuing conspiracy doctrine applied to California Cartwright Act actions, each new overt act in furtherance of the conspiracy — each new rigged bid submitted, each new price-fixing communication sent, each new customer allocation territory confirmed — constitutes a new violation that resets the § 16750.1 four-year limitations clock. The limitations computation therefore requires identifying the DATE OF LAST OVERT ACT rather than the date the conspiracy was formed or the date the plaintiff first suffered harm. Two advisory call types generate untracked billing at the COVERT MARKET COMPETITION DATE: (a) DATE OF LAST OVERT ACT identification and continuing conspiracy doctrine limitations advisory (40–48 min) — arrives when the plaintiff presents the antitrust matter for initial case evaluation. The advisory covers: identifying the nature and category of the alleged conspiracy (horizontal price-fixing per se illegal under § 16720 — no rule-of-reason analysis required; bid-rigging per se illegal; market allocation per se illegal; vertical restraints — manufacturer minimum resale price maintenance — subject to rule-of-reason analysis after Leegin Creative Leather Products v. PSKS, Inc. (2007) 551 U.S. 877, though California courts may apply a different analysis under the Cartwright Act); estimating the best-inference date of the last overt act from available pre-discovery evidence (industry pricing patterns, public government enforcement announcements, trade association records, competitor pricing data); computing the § 16750.1 four-year limitations window from that estimated last overt act date; applying the discovery rule (California Business and Professions Code § 16750.1 accrual can be tolled by the discovery rule until the plaintiff knew or reasonably should have known of the injury — relevant when the conspiracy was concealed through secret communications and the plaintiff only learned of it through a government enforcement announcement or a whistleblower); injury-in-fact analysis for standing (did the plaintiff pay an anticompetitive overcharge? was the plaintiff excluded from a market by the conspiracy? is the plaintiff within the class of plaintiffs for whom the Cartwright Act was designed to provide a remedy?). (b) § 16750(b) indirect purchaser standing and pass-through damages advisory (40–48 min) — covers: the California v. ARC America Corp. (1989) 490 U.S. 93 indirect purchaser doctrine (United States Supreme Court's confirmation that state indirect purchaser statutes like § 16750(b) are not preempted by the federal Illinois Brick doctrine; California may permit direct and indirect purchasers to sue simultaneously); identifying the client's supply chain position (is the plaintiff a direct purchaser — purchased directly from the price-fixing defendants at the overcharged price? or an indirect purchaser — purchased from an intermediary who purchased from the defendants, with the overcharge passed through the supply chain?); the econometric pass-through analysis (regression analysis of pre-conspiracy baseline pricing vs. conspiracy-period pricing; estimation of the overcharge percentage at the manufacturer level; estimation of the pass-through rate at each supply chain level between the manufacturer and the indirect purchaser — typically requiring a Ph.D. economist expert retained well before summary judgment); comparison of the California Cartwright Act indirect purchaser damages recovery to the federal Sherman Act's bar on indirect purchaser recovery (direct purchaser plaintiffs may sue in both California Superior Court § 16750 and federal district court § 15; indirect purchaser plaintiffs are limited to California § 16750 — they cannot recover under Sherman Act § 15).

Arithmetic: 7 active California Cartwright Act antitrust clients with DATE OF LAST OVERT ACT identification advisory, § 16750.1 limitations computation advisory, § 16750(b) indirect purchaser standing analysis, California v. ARC America Corp. pass-through damages advisory, and per se illegality vs. rule-of-reason analysis advisory needs during the year × 2 advisory calls (1 DATE OF LAST OVERT ACT identification and continuing conspiracy limitations advisory, 1 § 16750(b) indirect purchaser standing and pass-through damages advisory) × 42 min average × 55% untracked = 5.39 untracked hours = $1,617–$2,695/year at $300–$500/hr.

The Welch temporal anchor for all DATE OF LAST OVERT ACT advisory calls is the DATE OF LAST OVERT ACT IN ANTITRUST CONSPIRACY itself — the date embedded in the defendants' internal records from which the § 16750.1 four-year limitations clock ran and from which the Hensley lodestar begins. A § 16750(a) fee petition that begins the lodestar at the complaint filing date — or at the date the plaintiff first retained the antitrust attorney — misses the initial case evaluation, DATE OF LAST OVERT ACT identification, § 16750.1 limitations analysis, and § 16750(b) indirect purchaser standing analysis hours that are causally connected to the § 16750(a) mandatory fee claim from the DATE OF LAST OVERT ACT under Hensley v. Eckerhart (1983) 461 U.S. 424.

The FTC CID calendar and DOJ Antitrust Division CID plus criminal prosecution calendar and California AG parens patriae calendar and JPML MDL Panel transfer calendar advisory call cycle: 7.26 untracked hours = $2,178–$3,630/year

California Cartwright Act antitrust practice generates the broadest concurrent government enforcement calendar in the fee-petition-mechanics series — four distinct institutional authorities may simultaneously investigate or litigate the same anticompetitive conduct on four independent externally-controlled calendars: the Federal Trade Commission under FTC Act Section 5 and Section 20 CID authority; the DOJ Antitrust Division under Sherman Act Section 1 with both civil CID and criminal grand jury authority; the California Attorney General under § 16760 direct suit authority and Gov. Code § 11182 parens patriae authority; and the JPML MDL Panel under 28 U.S.C. § 1407 when concurrent federal Sherman Act claims filed in multiple districts are transferred to a single consolidated MDL proceeding. No other primary anchor in the fee-petition-mechanics series generates four concurrent government enforcement calendars simultaneously from the same underlying event date. Ketchum v. Moses (2001) 24 Cal.4th 1122. PLCM Group Inc. v. Drexler (2000) 22 Cal.4th 1084. Hensley v. Eckerhart (1983) 461 U.S. 424. Missouri v. Jenkins (1989) 491 U.S. 274.

FTC CID calendar. The Federal Trade Commission has civil antitrust jurisdiction under Section 5 of the FTC Act (15 U.S.C. § 45) — "unfair methods of competition" — which encompasses horizontal price-fixing, bid-rigging, and market-allocation conspiracies even without the need to prove a Sherman Act Section 1 agreement. The FTC issues Civil Investigative Demands (CIDs) under Section 20 of the FTC Act (15 U.S.C. § 57b-1) to compel production of documents, tangible things, electronic communications, and oral testimony from any person or entity that may possess information relevant to an antitrust investigation. FTC CIDs are not filed in any court — the FTC Commission authorizes the CID issuance by staff resolution under the FTC's internal delegated authority, and the CID is issued directly to the recipient by the FTC Bureau of Competition. The FTC's investigation calendar is entirely the FTC's to control: the investigation opening (FTC Commission vote, typically nonpublic), CID issuance (FTC staff action, may be the first public signal of the investigation when the CID recipient discloses receipt in SEC filings or press releases), CID compliance deadline (set in the CID's document request schedule, typically 30–60 days, with extensions granted at FTC staff discretion), supplemental CIDs (additional document requests after initial review), investigational hearings (sworn oral testimony on the FTC's scheduling calendar), and ultimately: an FTC complaint and consent order (if the FTC believes a violation occurred and negotiates a settlement); or an FTC administrative trial before an administrative law judge (if the FTC believes a violation occurred and no settlement is reached); or a recommendation that the DOJ bring a criminal prosecution (if the conduct appears criminally actionable); or a closing letter (if the FTC determines that the evidence is insufficient for enforcement action). Advisory calls arrive on the FTC's enforcement calendar: when the investigation opening is announced or becomes public — does this corroborate the plaintiff's § 16750 damages theory? should the private plaintiff file the § 16750 complaint now to obtain a favorable limitations computation, or wait for the FTC to develop more evidence? when the FTC issues a consent order — does the consent order's factual recitations corroborate the existence and duration of the conspiracy? can the consent order be used as collateral estoppel in the § 16750 civil action? when the FTC closes the investigation without action — does this undercut the § 16750 damages theory, and if so, what is the alternative evidence strategy?

DOJ Antitrust Division calendar. The DOJ Antitrust Division has concurrent civil and criminal jurisdiction over horizontal price-fixing, bid-rigging, and market-allocation conspiracies under Sherman Act Section 1 (15 U.S.C. § 1). Per se illegal conduct — horizontal price-fixing, bid-rigging, market allocation — is criminally prosecutable regardless of market power and without rule-of-reason analysis. DOJ criminal antitrust prosecutions carry: prison sentences up to 10 years per defendant (15 U.S.C. § 1); corporate fines up to the greater of $100 million or twice the conspiracy's gain or loss; individual fines up to $1 million. The DOJ criminal investigation calendar unfolds on the DOJ's own prosecution schedule: grand jury subpoenas (issued by the grand jury on the DOJ's presentation; the subpoena compliance schedule is set by the grand jury on the DOJ's timeline); plea negotiation (conducted between the DOJ and the corporate or individual defendant's counsel on the DOJ's timeline); deferred prosecution agreement negotiation (if the DOJ elects not to indict); criminal information or indictment filing (DOJ's decision when to charge); arraignment; pretrial motions; plea agreement entry or trial; sentencing. The DOJ criminal plea agreement is the most significant document for the private California § 16750 civil action: the plea agreement's factual basis — which must be filed publicly with the federal district court — typically specifies: the nature of the conspiracy (price-fixing, bid-rigging, or market allocation); the products or services affected; the geographic markets involved; the conspiracy period (the start date and the last date of overt conduct — directly corroborating the DATE OF LAST OVERT ACT determination for § 16750.1 limitations purposes); the volume of affected commerce; and the number of transactions affected. Advisory calls arrive on the DOJ criminal prosecution calendar: when the DOJ announces an investigation or public indictment (the announcement may be the private plaintiff's first public confirmation that the conspiracy existed beyond the plaintiff's pre-discovery inference); when a defendant enters a guilty plea (the plea agreement's factual basis may corroborate the DATE OF LAST OVERT ACT and the conspiracy's duration — potentially reducing the discovery burden in the § 16750 civil action); when sentencing occurs (the court's findings at sentencing about the volume of affected commerce and the victims' losses inform the § 16750(a) treble damages computation).

California AG parens patriae calendar. The California Attorney General has independent authority to bring Cartwright Act civil actions under Bus. & Prof. Code § 16760 (direct suit) and parens patriae antitrust actions under Gov. Code § 11182 on behalf of California residents harmed by anticompetitive conduct. When the AG brings a parens patriae action covering the same market and conspiracy period as the private § 16750 civil action, the AG's litigation operates on the AG's own docket calendar in California Superior Court — complaint filing (AG's decision), discovery (AG's discovery plan coordinated with the court's scheduling order), motion practice, summary judgment, and trial. The AG's investigation may also precede the private action: the AG's pre-suit civil investigative demands (similar to FTC CIDs, issued under California Gov. Code § 11180 et seq.) may produce conspiracy documents before the private plaintiff has filed suit. Advisory calls arrive on the AG calendar: when the AG announces an investigation or files a parens patriae complaint — should the private § 16750 plaintiff intervene in the AG action or maintain a separate civil action? what effect does the AG's parens patriae recovery have on the private § 16750 damages recovery? (the AG recovers on behalf of California residents as parens patriae; private plaintiffs recover for their own injury; there is no res judicata bar to the private § 16750 action from the AG's parens patriae recovery under § 16760).

JPML MDL Panel calendar. When the same horizontal price-fixing, bid-rigging, or market-allocation conspiracy generates Sherman Act Section 1 claims filed in multiple federal district courts, the Judicial Panel on Multidistrict Litigation (JPML Panel) under 28 U.S.C. § 1407 may transfer all related federal actions to a single federal district court for coordinated pretrial proceedings. JPML § 1407 transfers are initiated by: a motion for transfer filed by any party in any of the related federal actions; or a sua sponte order to show cause issued by the JPML Panel itself. The JPML Panel holds oral argument before the Panel, considers the parties' briefing on commonality of questions of fact and the convenience of parties and witnesses, and issues a transfer order designating the transferee court. The MDL judge then issues a case management order setting the MDL discovery schedule, bellwether trial selections, and pretrial milestones — entirely on the MDL judge's docket schedule, outside any individual plaintiff's scheduling control. Three advisory call types generate untracked billing across the four concurrent government enforcement calendars: (a) FTC investigation progress and consent order strategy advisory (42–50 min) — arrives when the FTC announces enforcement action or issues a consent order. Covers: FTC consent order factual findings and their corroboration value for the § 16750 DATE OF LAST OVERT ACT determination; collateral estoppel analysis (does the FTC consent order have issue-preclusive effect on the conspiracy's existence in the California § 16750 civil action? typically, FTC consent orders contain a "no-admission-of-liability" clause that limits collateral estoppel, but the factual recitations still corroborate the plaintiff's damages theory); investigation-closing impact on the § 16750 civil strategy. (b) DOJ Antitrust criminal prosecution and plea agreement advisory and AG parens patriae calendar advisory (42–50 min) — arrives when DOJ plea agreements are entered or AG parens patriae actions are filed. Covers: DOJ plea agreement factual basis DATE OF LAST OVERT ACT corroboration analysis; plea agreement scope of conspiracy and affected commerce volume for § 16750(a) treble damages computation; AG parens patriae action intervention analysis; AG/private plaintiff discovery coordination analysis. (c) JPML MDL Panel transfer and MDL strategy advisory (42–50 min) — arrives when a JPML transfer motion is filed or transfer order issued. Covers: MDL transfer strategy (should the private California § 16750 plaintiff remove to federal court and file a tag-along action for MDL transfer, or maintain the state § 16750 action in California Superior Court?); MDL discovery production use in the California state § 16750 action (if the MDL produces conspiracy documents, can those documents be introduced in the parallel California Superior Court § 16750 action?); Ketchum/Dague split preservation (maintaining the California § 16750 Superior Court action separate from the MDL Sherman Act action is critical to preserving the Ketchum multiplier eligibility of the California fee petition — if the § 16750 claim is removed to federal court, the Ketchum multiplier may be displaced by the Dague no-multiplier rule).

Arithmetic: 6 active Cartwright Act antitrust clients with FTC CID investigation progress advisory, DOJ plea agreement factual basis DATE OF LAST OVERT ACT corroboration advisory, consent decree strategy advisory, AG parens patriae calendar advisory, JPML MDL Panel transfer order strategy advisory, and collateral estoppel from government enforcement advisory needs during the year × 3 advisory calls (1 FTC investigation progress and consent order strategy advisory, 1 DOJ criminal prosecution and plea agreement and AG parens patriae advisory, 1 JPML MDL Panel transfer and MDL strategy advisory) × 44 min average × 55% untracked = 7.26 untracked hours = $2,178–$3,630/year at $300–$500/hr.

The unique billing gap driven by the four-concurrent-government-enforcement-calendar structure: unlike any other practice area in the fee-petition-mechanics series — including those with significant concurrent external calendars (the PAGA LWDA 65-day exhaustion period, the CUIAB appeal calendar, the IRS Form SS-8 determination calendar, the Cal/OSHA citation calendar) — the California Cartwright Act § 16750 practice generates four separate institutional-authority enforcement proceedings simultaneously from the DATE OF LAST OVERT ACT IN ANTITRUST CONSPIRACY, each with its own investigative or prosecutorial calendar, its own document production timeline, and its own evidentiary significance for the California § 16750 civil action. No other primary anchor in the fee-petition-mechanics series creates a four-concurrent-government-institution enforcement structure of this type.

The § 16750(a) mandatory treble damages calendar and mandatory attorney fee petition and Ketchum/Dague Hensley segregation between Cartwright Act California claims and concurrent Sherman Act federal claims advisory call cycle on the post-judgment calendar: 4.03 untracked hours = $1,210–$2,017/year

Bus. & Prof. Code § 16750(a) provides: 'Any person who is injured in his business or property by reason of anything forbidden or declared unlawful by this chapter, may sue therefor in any court having jurisdiction in the county where the defendant resides or is found or has an agent, and shall recover three times the damages he has sustained, and shall also be entitled to recover a reasonable attorney's fee, together with the costs of the suit.' The mandatory fee language — 'shall also be entitled to recover a reasonable attorney's fee' — combined with the mandatory treble damages provision ('shall recover three times the damages') creates the strongest combined mandatory fee-and-damages structure in the California Cartwright Act statutory scheme. 'Shall recover three times the damages' is particularly significant: unlike many California fee statutes that provide discretionary damages multipliers or that require additional findings for enhanced damages, § 16750(a)'s treble damages provision is automatic upon a finding of liability — a prevailing plaintiff shall recover treble damages as a matter of statutory mandate, not judicial discretion. This mandatory treble damages plus mandatory attorney fees structure creates a distinct Ketchum contingency analysis.

The Ketchum multiplier analysis in the § 16750(a) California Superior Court mandatory attorney fee petition is anchored to the contingent risk that existed at the DATE OF LAST OVERT ACT IN ANTITRUST CONSPIRACY — the inception of the Hensley lodestar. Ketchum v. Moses (2001) 24 Cal.4th 1122 requires examining the contingent risks assumed when the engagement was accepted. In California Cartwright Act practice, the Ketchum contingency factors at the DATE OF LAST OVERT ACT include: (1) Conspiracy existence uncertainty — at engagement inception, the plaintiff's counsel knows the plaintiff was harmed by anticompetitive pricing or market exclusion, but does not yet know — and cannot prove without discovery — whether the defendants engaged in a horizontal agreement (per se illegal under § 16720 and Sherman Act § 1) rather than parallel but independent business conduct (legal under both statutes). Proving per se illegality — the existence of an explicit or implicit 'meeting of the minds' among horizontal competitors — requires documents from the defendants' internal records (emails, meeting minutes, bid submission records, price-coordination communications) that are in the defendants' possession and not available to the plaintiff at engagement inception. This evidence uncertainty is the core Ketchum contingency in Cartwright Act practice: if civil discovery produces no documentary evidence of agreement (as opposed to mere parallel conduct), the § 16750 claim fails regardless of the economic harm the plaintiff suffered from the pricing outcomes. (2) DATE OF LAST OVERT ACT limitations uncertainty — the § 16750.1 four-year limitations clock runs from the last overt act, which is unknown to the plaintiff until discovery. If civil discovery reveals that the last overt act occurred more than four years before the complaint filing, the § 16750.1 limitations period may bar some or all of the plaintiff's damages — a binary contingency that existed at the DATE OF LAST OVERT ACT and was not resolved until discovery. (3) § 16750(b) indirect purchaser pass-through damages uncertainty — the econometric pass-through analysis required to prove indirect purchaser damages is genuinely uncertain at the DATE OF LAST OVERT ACT: the regression analysis may fail to isolate the anticompetitive overcharge from other market pricing factors; the supply chain pass-through rate may be contested by the defense's competing expert; the indirect purchaser's market position may be disputed. (4) Multi-defendant settlement fragmentation risk — Cartwright Act conspiracy cases typically involve multiple corporate and individual defendants; the uncertainty about which defendants will settle and at what amounts (affecting the remaining non-settling defendants' exposure and the plaintiff's total recovery), which defendants will pursue summary judgment (introducing binary liability uncertainty), and whether the non-settler trial produces a judgment that offsets the settler's contribution — all of this is genuinely uncertain at the DATE OF LAST OVERT ACT.

The Ketchum/Dague split is the defining structural complexity of the post-judgment fee petition in California Cartwright Act matters where the private plaintiff has also filed concurrent Sherman Act Section 1 claims in federal district court or in a JPML MDL proceeding. City of Burlington v. Dague (1992) 505 U.S. 557 held that contingency-based multipliers are categorically unavailable under federal fee-shifting statutes — including the Clayton Act attorney fee provision (15 U.S.C. § 15), which governs attorney fees in private Sherman Act damages actions. The Dague rule prohibits the positive multiplier that Ketchum v. Moses (2001) 24 Cal.4th 1122 permits in California Superior Court proceedings. This Ketchum/Dague split creates a Hensley task-level segregation obligation of the highest complexity: every hour of attorney work from the DATE OF LAST OVERT ACT IN ANTITRUST CONSPIRACY through the entry of judgment in each forum must be allocated between: (a) work exclusively attributable to the California Cartwright Act § 16750 claim in California Superior Court — compensable in the § 16750(a) California Superior Court mandatory fee petition at PLCM Group Inc. v. Drexler (2000) 22 Cal.4th 1084 California prevailing market rates, with Ketchum positive multiplier eligible based on the contingency factors at the DATE OF LAST OVERT ACT; (b) work exclusively attributable to the concurrent Sherman Act § 1 claim in federal district court or MDL — compensable in the Clayton Act § 15 federal mandatory fee petition at federal prevailing market rates, subject to City of Burlington v. Dague (1992) 505 U.S. 557 no-multiplier cap; and (c) common work that served both claims simultaneously — the DATE OF LAST OVERT ACT identification (necessarily common to both the § 16750.1 California limitations analysis and the Sherman Act limitations analysis); the conspiracy existence investigation (common to both claims' per se illegality requirement); the government enforcement calendar monitoring (FTC/DOJ/AG enforcement advisory calls serve both the California § 16750 and the federal Sherman Act claims simultaneously) — allocated between the two fee petition tracks in proportion to the relative significance of each claim, with contemporaneous billing records documenting the subject matter addressed in each advisory call.

Two post-judgment advisory call types generate untracked billing: (a) § 16750(a) mandatory treble damages computation and mandatory attorney fee petition advisory (42–50 min) — arrives at the time of judgment. The advisory covers: § 16750(a) treble damages computation — identifying the plaintiff's actual damages (the anticompetitive overcharge the plaintiff paid, multiplied by three — mandatory, not discretionary, upon liability finding); for § 16750(b) indirect purchaser plaintiffs, computing the pass-through damages using the econometric expert's final regression model (actual overcharge × pass-through rate × volume of indirect purchases during the conspiracy period × 3 mandatory treble multiplier); identifying all defendants jointly and severally liable under § 16750 and computing each defendant's apportioned exposure; computing the § 16750(a) mandatory attorney fee petition lodestar from the DATE OF LAST OVERT ACT through judgment at PLCM California prevailing market rates; identifying and documenting the Ketchum contingency factors at the DATE OF LAST OVERT ACT for the California Superior Court fee petition (conspiracy existence uncertainty, limitations uncertainty, indirect purchaser damages uncertainty, multi-defendant settlement fragmentation risk); computing the Ketchum positive multiplier request based on the documented contingency. (b) Ketchum/Dague Hensley segregation documentation and fees-on-fees assembly advisory for both the § 16750(a) California fee petition and the Clayton Act § 15 federal fee petition (42–50 min) — arrives as counsel prepares the mandatory fee petitions in both forums. The advisory covers: the Hensley task-level segregation analysis — reviewing all billing entries from the DATE OF LAST OVERT ACT through each forum's judgment and allocating each entry between California-exclusive, federal-exclusive, and common work; the California Superior Court § 16750(a) Ketchum multiplier documentation — articulating the contingency factors at the DATE OF LAST OVERT ACT and the multiplier's proportionality to the documented risk; the federal district court Clayton Act § 15 Dague no-multiplier analysis — confirming that no positive multiplier is requested in the federal fee petition and that the lodestar ceiling is the prevailing federal market rate; PLCM Group Inc. v. Drexler (2000) 22 Cal.4th 1084 California prevailing market rate documentation for the California § 16750(a) petition vs. the applicable federal prevailing market rate documentation for the Clayton Act § 15 petition; Missouri v. Jenkins (1989) 491 U.S. 274 fees-on-fees in both petitions — time spent assembling the Hensley lodestar from the DATE OF LAST OVERT ACT through judgment, performing the Ketchum/Dague segregation analysis, computing the § 16750(a) treble damages calendar, and preparing both mandatory fee petitions is itself compensable in both the California and federal fee awards.

Arithmetic: 5 active § 16750(a) / Clayton Act § 15 mandatory fee petition clients requiring DATE-OF-LAST-OVERT-ACT-to-judgment Hensley lodestar assembly, § 16750(a) mandatory treble damages computation, § 16750(b) indirect purchaser pass-through damages documentation, Ketchum positive multiplier documentation for the California Superior Court § 16750(a) fee petition, City of Burlington v. Dague no-multiplier analysis for the concurrent Clayton Act § 15 federal fee petition, Hensley task-level segregation between California Cartwright Act fee petition and federal Sherman Act fee petition, and Missouri v. Jenkins fees-on-fees advisory during the year × 2 advisory calls (1 § 16750(a) mandatory treble damages computation and mandatory attorney fee petition advisory, 1 Ketchum/Dague Hensley segregation documentation and fees-on-fees assembly advisory) × 44 min average × 55% untracked = 4.03 untracked hours = $1,210–$2,017/year at $300–$500/hr.

How ClaimHour fits California Cartwright Act antitrust practice

California Cartwright Act antitrust solos billing hourly on § 16750(a) mandatory attorney fees — with DATE OF LAST OVERT ACT identification advisory calls arriving when the plaintiff presents the antitrust matter for case evaluation and the COVERT MARKET COMPETITION DATE (the ONLY primary Welch anchor in the fee-petition-mechanics series in a DATE KNOWN TO THE DEFENDANTS AND UNKNOWN TO THE PLAINTIFF AT ENGAGEMENT INCEPTION — embedded in defendants' bid submission records, price-fixing communications, and customer allocation records; accessible only through civil discovery or government CID production; determined retroactively through litigation) starts the Hensley lodestar, § 16750(b) indirect purchaser standing and California v. ARC America Corp. pass-through damages advisory calls arriving when the plaintiff's supply chain position is analyzed (earlier than any complaint filing, earlier than any government enforcement announcement), FTC CID investigation progress advisory calls arriving on the FTC's investigation calendar entirely outside the private plaintiff attorney's scheduling control, DOJ Antitrust Division criminal prosecution and plea agreement factual basis DATE OF LAST OVERT ACT corroboration advisory calls arriving on the DOJ's prosecution calendar entirely outside the plaintiff attorney's scheduling control, California AG parens patriae litigation calendar advisory calls arriving on the AG's court docket schedule, JPML MDL Panel transfer order strategy advisory calls arriving on the JPML Panel's transfer order schedule entirely outside any individual plaintiff attorney's scheduling control, and § 16750(a) mandatory treble damages + Ketchum/Dague split post-judgment fee petition advisory calls arriving at judgment in each forum — and if your § 16750(a) mandatory fee petition lodestar documentation must satisfy the Hensley contemporaneous-record standard from the DATE OF LAST OVERT ACT IN ANTITRUST CONSPIRACY (the covert market date embedded in the defendants' internal records) through judgment in California Superior Court and in federal district court or MDL, with Hensley task-level Ketchum/Dague segregation distinguishing California Cartwright Act hours (Ketchum multiplier eligible) from concurrent Sherman Act hours (Dague no-multiplier) from common hours (proportionate allocation between both fee petition tracks), with Missouri v. Jenkins fees-on-fees for both the California § 16750(a) and the federal Clayton Act § 15 fee petition preparation tracks, ClaimHour was built for that gap.

The general antitrust practice area (antitrust attorney fee petition mechanics) covers the broad antitrust fee petition mechanics framework. The California Cartwright Act § 16750 practice area is distinct in three dimensions: (1) the DATE OF LAST OVERT ACT IN ANTITRUST CONSPIRACY is the only primary anchor in the fee-petition-mechanics series in a COVERT MARKET COMPETITION DATE — known to the defendants and unknown to the plaintiff at engagement inception, accessible only through adversarial litigation; (2) § 16750(b) indirect purchaser standing (California v. ARC America Corp. — California rejects Illinois Brick) creates a California-specific plaintiff class that is broader than the federal Sherman Act direct-purchaser-only standing rule; and (3) the Ketchum/Dague split in the post-judgment fee petition — the California § 16750(a) mandatory fee petition in California Superior Court is Ketchum multiplier eligible, while the concurrent Sherman Act Clayton Act § 15 mandatory fee petition in federal district court is subject to the Dague no-multiplier rule — requiring Hensley task-level segregation between the two fee petition tracks from the DATE OF LAST OVERT ACT through each forum's judgment. The securities litigation practice area (securities litigation attorney fee petition mechanics) also involves multi-forum concurrent proceedings; the Cartwright Act practice is distinct because the primary anchor is in a covert market date rather than a securities filing date. The FEHA practice area (FEHA California Civil Rights Department attorney fee petition mechanics) also generates concurrent government enforcement calendars (CRD administrative complaint); the Cartwright Act practice is distinct because the government enforcement spans four institutional authorities (FTC, DOJ, California AG, JPML MDL) rather than one.

The programmatic reference page for the California Cartwright Act antitrust practice area is at California Cartwright Act antitrust Bus. & Prof. Code § 16750 attorney fee petition mechanics.

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