Reliance Steel & Aluminum Co
Ownership
Ownership Structure
Who owns Reliance Steel & Aluminum Co (RS)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.3% of the shares are freely tradable; institutional investors hold 85.3%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 11.38 | 5,811,245 | -0.4 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 6.44 | 3,290,031 | -2.6 | 06/30/2026 |
| State Street Corp | 5.14 | 2,625,386 | -7.2 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.52 | 2,308,297 | -0.9 | 06/30/2026 |
| Boston Partners Global Investors, Inc | 4.30 | 2,196,803 | +4.1 | 06/30/2026 |
| T. Rowe Price Associates, Inc. | 3.02 | 1,542,674 | +0.8 | 06/30/2026 |
| Wellington Management Company LLP | 2.61 | 1,330,345 | -7.7 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Mid-Cap ETF | 3.56 | 1,818,596 | +0.0 | 09/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.18 | 1,625,485 | +0.3 | 09/30/2026 |
| Vanguard Small Cap Index | 2.25 | 1,149,166 | -2.2 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Smith William A II | SVP, General Counsel, Corp Sec | 19,394 | 8,473,239 $ | Jul 28, 2026 | direct |
| Ajemyan Arthur | SVP, CFO | 14,640 | 6,396,216 $ | Jul 31, 2026 | direct |
| Koch Stephen Paul | Exec. VP, COO | 8,209 | 3,586,512 $ | Oct 27, 2026 | direct |
| Colonias Karen Winifred | Director | 7,772 | 3,395,587 $ | Aug 26, 2026 | indirect |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 27, 2026 | Koch Stephen Paul | Exec. VP, COO | Sell | 1,004 | 432.23 | 433,959 |
| Oct 27, 2026 | Koch Stephen Paul | Exec. VP, COO | Sell | 3,136 | 431.22 | 1,352,306 |
| Oct 27, 2026 | Koch Stephen Paul | Exec. VP, COO | Sell | 4,194 | 430.28 | 1,804,594 |
| Aug 26, 2026 | Colonias Karen Winifred | Director | Sell | 1,542 | 390.13 | 601,580 |
| Jul 31, 2026 | Ajemyan Arthur | SVP, CFO | Sell | 2,200 | 410.11 | 902,242 |
| Jul 28, 2026 | Smith William A II | SVP, General Counsel, Corp Sec | Sell | 1,391 | 414.42 | 576,458 |
| Jul 28, 2026 | Smith William A II | SVP, General Counsel, Corp Sec | Sell | 962 | 413.90 | 398,172 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: October 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.