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STLD

Steel Dynamics Inc

Company with tickers: STLD

CIK
1022671
CUSIP
858119100
Shares Outstanding
144,212,781
13F Activity (30d)
281 filings 268 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 934
Total Value: $21,507,009,120
Total Shares: 119,483,384
Showing 1–100 of 963 holdings by value · page 1 of 10

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 934 13F filers · Δ vs Dec 31, 2025
Top Holder
10.4%
Jun 2023 → Mar 2026 · range 10.4% – 15.4%
−0.2 pts
Top 5
33.6%
Jun 2023 → Mar 2026 · range 29.9% – 42.3%
+3.6 pts
Top 10
46.6%
Jun 2023 → Mar 2026 · range 43.8% – 53.5%
+2.8 pts
HHI
325
Jun 2023 → Mar 2026 · range 288 – 511
Broadly held+37

Quarterly Activity

vs Dec 31, 2025
New
147
Increased
318
Decreased
308
Sold Out
104
Unchanged
161
Holder count: +43
Institutional value: +84.7%
Shares held: +73.9%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Showing 100 of 963
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Holder Value (USD) % of 13F Shares Open