Altarock Partners Portfolio | Mark Massey 13F Holdings & Trades

	Hedge Fund	Portfolio Manager	Performance 26Q1	AUM (13F)	# of Holdings	Performance Rank	Allocation
Altarock Partners	Mark Massey	-13.46%	$4126337000	8

Altarock Partners Holdings Map

Top 50 Altarock Partners Holdings

Trade Value: Δ in % of Portf:

% of Portfolio:

Stock	Company Name	% of Portfolio	Δ % of Portf	Shares Owned	Calls/Puts	Value Owned	Trade Value	Latest Activity	Ownership Hist	Net Ownership Hist	Average Buy Price	Price History	Sector	Date

Largest Stock Buys since Q1 2026:

Stock	Company Name	% of Portfolio	Δ % of Portf	Shares Owned	Calls/Puts	Value Owned	Trade Value	Latest Activity	Ownership Hist	Net Ownership Hist	Average Buy Price	Price History	Date

Largest Stock Sells since Q1 2026:

Stock	Company Name	% of Portfolio	Δ % of Portf	Shares Owned	Calls/Puts	Value Owned	Trade Value	Latest Activity	Ownership Hist	Net Ownership Hist	Average Buy Price	Price History	Date

Sector Allocation over time

Portfolio Structure

Data Integrity at Scale

HedgeFollow applies mass data sanitization to improve accuracy, with over 1 million errors corrected across all 13F filings.

Filing-level errors

Filing-level errors affect the entire 13F submission.

Error Type	Affected Quarter	Filing Accession Number
🔒 Results are restricted to reps under the institutional plan This table contains any detected filing-level issues for this fund. Examples: Filing-wide unit inconsistencies Incorrect Amendments

Record-level errors

Record-level errors affect individual holdings.

Error Type	Quarter	Cusip	Incorrect Value	Correct Value	Filing Number
🔒 Results are restricted to reps under the institutional plan This table contains any detected record-level issues for this fund. Examples: Invalid or mismatched CUSIPs Incorrect share counts Incorrect values reported

Includes access to filing diagnostics and additional institutional features.

Altarock Partners Performance History

Performance Metric	3-Year Annualized Return	3-Year Cumulative Return	Compared to other Funds

Performance vs S&P500

Performance compared to other Funds

AI Portfolio Analysis for Q1 2026

AI tries to find strong signals with low noise. Learn More

Signal Strength	Insight

AUM Reported to SEC

AUM reported here may differ from 13F AUM. Why?

Investment Advisor	Discretionary AUM	Non-Discretionary AUM	Total AUM	Reporting Date

AUM for US vs Foreign Investors

AUM for Fund Owners vs Investors

AUM by Client Type

Total AUM vs 13F AUM

Note Firms may now customize their profile and review potential filing errors under the Institutional plan.

Address & Contact Info

Investment Advisor	Business Address	Phone/Fax	Email	Work Days/Hours

Organization

Investment Advisor	Organization Form	Org. State & Country	# of Employees	# of Employees in Research & Investment Advising

# of Clients by Category

Portfolio Management Services Provided

Investment Advisor	For Individuals & Small Business	For Investment/BizDev Companies	For Institutions	For Hedge Funds & Other PIV

Other Investment Services Provided

Investment Advisor	Financial Planning	Security Rating	Pension Consulting	Newsletters	Market Timing	Education	Advisor Selection	Other

Other Business Services Provided

Investment Advisor	Broker/Dealer	Broker/Dealer Rep	Commodity Trading	Futures Merchant	Real Estate	Insurance	Bank	Trust	Municipal Advisor	Swap Dealer	Swap Participant	Accountant	Lawyer	Other

Compensation Policy

Investment Advisor	% of AUM Fees	Performance-Based	Hourly Fees	Subscription Fees	Fixed Fees	Commissions	Other

Owners & Executive Officers

Name	Title	Control Person	% Ownership	Start Date	Type	Indirect Ownership Through

Websites/Socials

Website/Social Address

Mark Massey 13F Portfolio