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 Q3 2021?

97 institutional investors reported RYZ - Ryerson Holding Corp - Common Stock, $0.01 par value, 100,000,000 shares authorized for Q3 2021. Use the holders table for investor-level position and value details.

CUSIP: 783754104

Q3 2021 13F Holders as of 30 Sep 2021

Security type / class: Equity / Common Stock, $0.01 par value, 100,000,000 shares authorized
Total 13F shares: 35,209,291
Total 13F value: $784,067,491
Share change: -543,001
Put/Call ratio: 413%
SEC-reported price per share: $22.27
Number of holders: 97
Value change: -$6,350,312
Number of buys: 45
Number of sells: 57
Shares outstanding: 51,392,864

Security key

783754104

Report period

Q3 2021

Institutions

Top holders

RYZ full security history Ownership snapshot Full 13F holder table Newer quarter: Q4 2021 Previous quarter: Q2 2021 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 2021 Previous quarter: Q2 2021

Recent filing periods:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

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

30 Jun 2021

13F Lead comparable stake: 41% Showing 1-6 of 15 holder rows.

Quick read

Platinum Equity Advisors, LLC/DE leads the comparable SEC ownership view at 41%.

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 41%

BlackRock Finance, Inc. 3.8%

TOWLE & CO 3%

DIMENSIONAL FUND ADVISORS LP 2.6%

JB CAPITAL PARTNERS LP 2.1%

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	41%	$307,148,000 21,037,500 shares	—	30 Jun 2021
BlackRock Finance, Inc.	13F Company 13F	3.8%	$28,586,000 1,957,967 shares	—	30 Jun 2021
TOWLE & CO	13F Company 13F	3%	$22,402,000 1,534,411 shares	—	30 Jun 2021
DIMENSIONAL FUND ADVISORS LP	13F Company 13F	2.6%	$19,343,000 1,324,924 shares	—	30 Jun 2021
JB CAPITAL PARTNERS LP	13F Company 13F	2.1%	$16,007,000 1,096,394 shares	—	30 Jun 2021
ACADIAN ASSET MANAGEMENT LLC	13F Company 13F	1.9%	$13,883,000 950,963 shares	—	30 Jun 2021

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 Q3 2021

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

Institutions

35,209,291

Rows available

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 Q3 2021 vs Q2 2021 Across Filers

Q2 2021 holders

Q3 2021 holders

Holder diff

Investor	Q2 2021 Shares	Q3 2021 Shares	Share Diff	Share Chg %	Q2 2021 value	Q3 2021 value	Value change	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend