Ryerson Holding Corp - Common Stock, $0.01 par value, 100,000,000 shares authorized (RYZ)

Q: What does CUSIP 783754104 represent in this 13F holders report?

CUSIP 783754104 is the security identifier for RYZ - Ryerson Holding Corp - Common Stock, $0.01 par value, 100,000,000 shares authorized used to aggregate holder disclosures.

Q: How many institutions held RYZ - Ryerson Holding Corp - Common Stock, $0.01 par value, 100,000,000 shares authorized in Q1 2023?

182 institutional investors reported RYZ - Ryerson Holding Corp - Common Stock, $0.01 par value, 100,000,000 shares authorized for Q1 2023. Use the holders table for investor-level position and value details.

CUSIP: 783754104

Q1 2023 13F Holders as of 31 Mar 2023

Security type / class: Equity / Common Stock, $0.01 par value, 100,000,000 shares authorized
Total 13F shares: 33,246,371
Total 13F value: $1,209,410,800
Share change: -1,766,952
Put/Call ratio: 286%
SEC-reported price per share: $36.38
Number of holders: 182
Value change: -$61,975,933
Number of buys: 92
Number of sells: 79
Shares outstanding: 51,934,753

Security key

783754104

Report period

Q1 2023

Institutions

182

Top holders

RYZ full security history Ownership snapshot Full 13F holder table Newer quarter: Q4 2025 Ryerson Holding Corp SEC filings Ryerson Holding Corp company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 783754104

Newer quarter: Q4 2025

Recent filing periods:

Q2 2026 Q4 2025

Ownership snapshot

Top reported holders of RYZ - Ryerson Holding Corp - Common Stock, $0.01 par value, 100,000,000 shares authorized (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

Platinum Equity Advisors,...

Disclosed value leader

Platinum Equity Advisors,...

Comparable rows

15/15

Latest evidence

31 Dec 2022

13F Lead comparable stake: 31% Showing 1-6 of 15 holder rows.

Quick read

Platinum Equity Advisors, LLC/DE leads the comparable SEC ownership view at 31%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Platinum Equity Advisors, LLC/DE's linked filing trail.

Comparable ownership Top 5

Platinum Equity Advisors, LLC/DE 31%

BlackRock Finance, Inc. 3.8%

JB CAPITAL PARTNERS LP 3.6%

DIMENSIONAL FUND ADVISORS LP 3.3%

VANGUARD GROUP INC 2.4%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Platinum Equity Advisors, LLC/DE	13F Company 13F	31%	$481,874,704 15,924,478 shares	—	31 Dec 2022
BlackRock Finance, Inc.	13F Company 13F	3.8%	$59,733,028 1,973,993 shares	—	31 Dec 2022
JB CAPITAL PARTNERS LP	13F Company 13F	3.6%	$56,041,308 1,851,993 shares	—	31 Dec 2022
DIMENSIONAL FUND ADVISORS LP	13F Company 13F	3.3%	$51,900,000 1,715,201 shares	—	31 Dec 2022
VANGUARD GROUP INC	13F Company 13F	2.4%	$37,238,017 1,230,602 shares	—	31 Dec 2022
STATE STREET CORP	13F Company 13F	1.8%	$28,272,856 934,331 shares	—	31 Dec 2022

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2023

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

182

33,246,371

Rows available

182

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2023 vs Q4 2025 Across Filers

Q4 2025 holders

144

Q1 2023 holders

182

Holder diff

Investor	Q4 2025 Shares	Q1 2023 Shares	Share Diff	Share Chg %	Q4 2025 value	Q1 2023 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend