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STLDSteel Dynamics · Insider ownership research

Steel Dynamics insiders sold $8.9M in the past 12 months. How much of their stake is that?

About 0.4% overall. As a group they ended with more shares than they started with. The biggest individual seller, James Anderson, sold shares equal to 9.8% of starting holdings, but more vested, so the stake grew.

Updated Oct 9, 2026 from SEC filings · covers Oct 10, 2025 to Oct 9, 2026
How this comparesMore of their stake sold than at 73 of the 416 other companies we can measure (#344 of 417)See ranking
0
buyers among officers and directors, past 12 months
0%
of sales were under disclosed trading plans, past 12 months
5 of 18
officers and directors sold shares, past 12 months
Recent activity · past 30 days, Sep 10, 2026 to Oct 9, 2026

No officer or director trades were reported for the past 30 days. The most recent before that:

Jul 28, 2026Mark Millett gave away 300 shares as a gift. That is under 0.1% of the total stake held that day.
WhoSharesPrice% of total stakeTotal stake afterTrade dateFiled
Mark Millett
Chairman and CEO, Director
300n/aunder 0.1%3.02MJul 28, 2026Jul 28, 2026

"% of total stake" is the shares in this event against all the vested shares the person held that day, across every share class and holding entity, after that day's vesting. "n/a" means the person's holdings don't reconcile, or the row is a purchase. "Holdings record incomplete" means more shares were sold than the filings show the person held that day, so a percentage would be wrong.

Is this normal? Less than usual: about one-fifth of the 5-year average. 5 insiders sold; the average is 5 a year. Year by year
Latest filing: Filed Aug 14 for a stock award on Aug 13. Jennifer Hamann received an award of 72 shares. Filing
95 SEC ownership filings in the period · See the evidence

What stands out

Four insiders sold $8.4M with no disclosed plan: James Anderson ($2.7M, 9.8% of holdings), Miguel Alvarez ($2.4M, 10%) and Christopher Graham ($2.1M, 13%), plus 1 more. The filings don't state a reason.James Anderson: largest such sale, Jun 5, 2026 · Miguel Alvarez: largest such sale, Oct 29, 2025 · Christopher Graham: largest such sale, May 13, 2026
Three officers sold shares but ended with larger stakes, because more shares came in than were sold: James Anderson (sold 10K, 9.8% of starting holdings; 19K added), Christopher Graham (sold 9K, 13% of starting holdings; 22K added) and Richard Poinsatte (sold 2.3K, 9.0% of starting holdings; 8.9K added).James Anderson: largest sale, Jun 5, 2026 · Christopher Graham: largest sale, May 13, 2026 · Richard Poinsatte: largest sale, May 12, 2026
Tax withholding outweighed market sales: the company withheld $19.6M of officers' and directors' shares for taxes, against $8.9M sold on the open market. The largest was Mark Millett ($5.9M withheld).Largest withholding, Mar 13, 2026

Percentages cover all 18 officers and directors. Disclosed company stock is not an insider's whole wealth.

Who sold, and how much of their stake

Officers and directors, past 12 months. Each bar is 100% of that person's own stake; not comparable between people. The stake is the vested shares held at the start of the period (Oct 9, 2025); the gold part is what they sold.

SoldRest of starting stake
James Anderson
Senior Vice President
9.8% · $2.7MNo plan disclosed
Miguel Alvarez
Senior Vice President
10% · $2.4MNo plan disclosed
Christopher Graham
Senior Vice President
13% · $2.1MNo plan disclosed
Kenneth Cornew
Director
14% · $1.1MNo plan disclosed
Richard Poinsatte
Senior Vice President
9.0% · $538KNo plan disclosed
Amounts, filings and trading plans for each seller

Selling by month

Officers and directors, Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.

No plan disclosedOne dollar scale for every month; the tallest bar is labeled
Oct 2025: $1.3M no plan disclosedOctNovDecJanFebMarApr 2026: $2.2M no plan disclosedAprMay 2026: $2.7M no plan disclosedMayJun 2026: $2.7M no plan disclosed$2.7MJunJulAugSepOct

Outside holders, reported separately

Richard Teets Jr. reported no open-market sales in the past 12 months. Large shareholders and the funds or companies that board members represent are not part of management, so they are left out of the figures above.

Details

Common questions

Is the Steel Dynamics CEO selling stock?

No. Mark Millett reported no open-market sales in the past 12 months.

Why are Steel Dynamics insiders selling?

Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 0% of sales by value ran under 10b5-1 trading plans disclosed in the filings and 100% had no disclosed plan. A trading plan schedules sales in advance.

Are any Steel Dynamics insiders buying?

No. Officers and directors reported no purchases in the past 12 months.

How much of their stake did Steel Dynamics insiders sell?

About 0.4% overall. As a group they ended with more shares than they started with. The biggest individual seller, James Anderson, sold shares equal to 9.8% of starting holdings, but more vested, so the stake grew. That covers the 12 months to Oct 9, 2026 and counts vested shares reported on SEC Forms 3, 4 and 5, which is not an insider's whole wealth.

The evidence

Who sold5 officers and directors: amount, % of holdings, trading plan
Who soldAmount% of holdingsTrading plan
James Anderson
Senior Vice President
$2.7M
10K shares
9.8%No plan disclosed
Miguel Alvarez
Senior Vice President
$2.4M
13K shares
10%No plan disclosed
Christopher Graham
Senior Vice President
$2.1M
9K shares
13%No plan disclosed
Kenneth Cornew
Director
$1.1M
5K shares
14%No plan disclosed
Richard Poinsatte
Senior Vice President
$538K
2.3K shares
9.0%No plan disclosed

Sold by a charitable foundation the insider reports: Teets Family Foundation, reported by Richard Teets Jr.. A foundation's shares are not the insider's own stake, so they are left out of the figures above.

The full ownership picture18 of 18 insiders fully reconciled · 18 officers and directors

Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.

InsiderHeld Oct 9, 2025SoldHeld Oct 9, 2026Still held
Richard Teets Jr.
i
Includes unvested RSUs, amount not disclosed. Additional holdings last reported more than 3 years ago are shown separately and excluded from totals. Shares owned by Teets Family Foundation are a charitable foundation's, listed separately and not counted here.
Director
5.07M05.07Mno sales
Vesting, gifts, unvested awards and holding lines for Richard Teets Jr.
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
  • Includes unvested RSUs, amount not disclosed.
  • Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.
  • Shares owned by Teets Family Foundation are a charitable foundation's, listed separately and not counted here.
Held throughShare classOct 9, 2025Oct 9, 2026
Direct
includes unvested RSUs, amount not disclosed
Common Stock4,979,6234,980,252
SpouseCommon Stock93,11993,119

Additional holdings last reported Feb 25, 2022, not confirmed since: 115,441 shares. Not included in any total or percentage on this page.

Mark Millett
i
Includes unvested RSUs, amount not disclosed.
Chairman and CEO, Director
2.99M03.02Mno sales
Vesting, gifts, unvested awards and holding lines for Mark Millett
0shares vested or exercised
−300gifted (net of own trusts)
−32Kwithheld by the company for taxes
none reportedunvested awards, start → end
  • Includes unvested RSUs, amount not disclosed.
Held throughShare classOct 9, 2025Oct 9, 2026
Direct
includes unvested RSUs, amount not disclosed
Common Stock2,988,9413,016,401
Theresa Wagler
i
Includes unvested RSUs, amount not disclosed.
Executive Vice President & CFO
482K0495Kno sales
Vesting, gifts, unvested awards and holding lines for Theresa Wagler
0shares vested or exercised
0gifted (net of own trusts)
−14Kwithheld by the company for taxes
none reportedunvested awards, start → end
  • Includes unvested RSUs, amount not disclosed.
Held throughShare classOct 9, 2025Oct 9, 2026
Direct
includes unvested RSUs, amount not disclosed
Common Stock482,173495,038
Barry Schneider
i
Includes unvested RSUs, amount not disclosed.
President and COO
230K0246Kno sales
Vesting, gifts, unvested awards and holding lines for Barry Schneider
0shares vested or exercised
0gifted (net of own trusts)
−16Kwithheld by the company for taxes
none reportedunvested awards, start → end
  • Includes unvested RSUs, amount not disclosed.
Held throughShare classOct 9, 2025Oct 9, 2026
Direct
includes unvested RSUs, amount not disclosed
Common Stock229,688246,399
Glenn Pushis
i
Includes unvested RSUs, amount not disclosed.
Senior Vice President
141K0133Kno sales
Vesting, gifts, unvested awards and holding lines for Glenn Pushis
0shares vested or exercised
0gifted (net of own trusts)
−8.7Kwithheld by the company for taxes
none reportedunvested awards, start → end
  • Includes unvested RSUs, amount not disclosed.
Held throughShare classOct 9, 2025Oct 9, 2026
Direct
includes unvested RSUs, amount not disclosed
Common Stock141,350133,008
Miguel Alvarez
i
Includes unvested RSUs, amount not disclosed.
Senior Vice President
125K−13K122K98%
Vesting, gifts, unvested awards and holding lines for Miguel Alvarez
0shares vested or exercised
0gifted (net of own trusts)
−11Kwithheld by the company for taxes
none reportedunvested awards, start → end
  • Includes unvested RSUs, amount not disclosed.
Held throughShare classOct 9, 2025Oct 9, 2026
Direct
includes unvested RSUs, amount not disclosed
Common Stock125,319122,257
James Anderson
i
Includes unvested RSUs, amount not disclosed.
Senior Vice President
103K−10K103K+0.3%
Vesting, gifts, unvested awards and holding lines for James Anderson
0shares vested or exercised
0gifted (net of own trusts)
−9Kwithheld by the company for taxes
none reportedunvested awards, start → end
  • Includes unvested RSUs, amount not disclosed.
Held throughShare classOct 9, 2025Oct 9, 2026
Direct
includes unvested RSUs, amount not disclosed
Common Stock102,556102,837
Gabriel Shaheen
Director
82K083Kno sales
Vesting, gifts, unvested awards and holding lines for Gabriel Shaheen
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock82,01382,520
Christopher Graham
i
Includes unvested RSUs, amount not disclosed.
Senior Vice President
67K−9K69K+3%
Vesting, gifts, unvested awards and holding lines for Christopher Graham
0shares vested or exercised
0gifted (net of own trusts)
−11Kwithheld by the company for taxes
none reportedunvested awards, start → end
  • Includes unvested RSUs, amount not disclosed.
Held throughShare classOct 9, 2025Oct 9, 2026
Direct
includes unvested RSUs, amount not disclosed
Common Stock66,73868,747
Traci Dolan
Director
60K059Kno sales
Vesting, gifts, unvested awards and holding lines for Traci Dolan
0shares vested or exercised
−2Kgifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock59,76858,970
Bradley Seaman
Director
50K052Kno sales
Vesting, gifts, unvested awards and holding lines for Bradley Seaman
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock50,36051,600
Kenneth Cornew
Director
36K−5K32K88%
Vesting, gifts, unvested awards and holding lines for Kenneth Cornew
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock36,28332,013
Sheree Bargabos
Director
26K027Kno sales
Vesting, gifts, unvested awards and holding lines for Sheree Bargabos
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock25,56727,105
Richard Poinsatte
i
Includes unvested RSUs, amount not disclosed.
Senior Vice President
25K−2.3K28K+12%
Vesting, gifts, unvested awards and holding lines for Richard Poinsatte
0shares vested or exercised
−200gifted (net of own trusts)
−3.4Kwithheld by the company for taxes
none reportedunvested awards, start → end
  • Includes unvested RSUs, amount not disclosed.
Held throughShare classOct 9, 2025Oct 9, 2026
Direct
includes unvested RSUs, amount not disclosed
Common Stock25,40828,418
Chad Bickford
i
Includes unvested RSUs, amount not disclosed.
Vice President
21K024Kno sales
Vesting, gifts, unvested awards and holding lines for Chad Bickford
0shares vested or exercised
0gifted (net of own trusts)
−554withheld by the company for taxes
none reportedunvested awards, start → end
  • Includes unvested RSUs, amount not disclosed.
Held throughShare classOct 9, 2025Oct 9, 2026
Direct
includes unvested RSUs, amount not disclosed
Common Stock20,83824,025
Luis Sierra
Director
11K012Kno sales
Vesting, gifts, unvested awards and holding lines for Luis Sierra
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock10,76311,523
Jennifer Hamann
Director
4.2K05.4Kno sales
Vesting, gifts, unvested awards and holding lines for Jennifer Hamann
0shares vested or exercised
0gifted (net of own trusts)
none reportedunvested awards, start → end
Held throughShare classOct 9, 2025Oct 9, 2026
DirectCommon Stock4,2275,376
Matthew Bell
i
Includes unvested RSUs, amount not disclosed. Started reporting during the period; starting holdings are from the Form 3.
Vice President
43302Kno sales
Vesting, gifts, unvested awards and holding lines for Matthew Bell
0shares vested or exercised
0gifted (net of own trusts)
−125withheld by the company for taxes
none reportedunvested awards, start → end
  • Includes unvested RSUs, amount not disclosed.
  • Started reporting during the period; starting holdings are from the Form 3.
Held throughShare classOct 9, 2025Oct 9, 2026
Direct
includes unvested RSUs, amount not disclosed
Common Stock4162,017
Roth IRACommon Stock1717

18 of 18 insiders fully reconciled: starting holdings plus reported transactions match ending holdings (18 exactly, 0 with a minor or footnoted difference). Percentages cover all 18 officers and directors. "Still held" compares ending with starting vested shares; a plus sign means the holding grew.

What explains the selling$8.9M of sales by plan status, purpose, seller and month

Officer and director open-market sales: $8.9M across 39,376 shares. Plan status and stated purpose are separate questions, and a sale can have both.

By plan status

No plan disclosed · $8.9M

Sales with no 10b5-1 plan and no tax reference in the filing. $2.7M of it is James Anderson. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: Miguel Alvarez, Oct 29, 2025

Taxes

106,323 shares ($19.6M) were withheld by the company for taxes, which isn't a market sale.

SellerShares soldProceedsUnder a disclosed planShare of totalSales dates
James Anderson
Senior Vice President
10K$2.7M0%30%Jun 5, 2026 to Jun 5, 2026
Miguel Alvarez
Senior Vice President
13K$2.4M0%27%Oct 29, 2025 to Apr 23, 2026
Christopher Graham
Senior Vice President
9K$2.1M0%24%May 13, 2026 to May 13, 2026
Kenneth Cornew
Director
5K$1.1M0%13%Apr 23, 2026 to Apr 23, 2026
Richard Poinsatte
Senior Vice President
2.3K$538K0%6%May 12, 2026 to May 12, 2026

Sales by month

MonthSale proceedsDisclosed planTo cover taxesNo plan disclosed
Oct 2025$1.3M$0$0$1.3M
Nov 2025$0$0$0$0
Dec 2025$0$0$0$0
Jan 2026$0$0$0$0
Feb 2026$0$0$0$0
Mar 2026$0$0$0$0
Apr 2026$2.2M$0$0$2.2M
May 2026$2.7M$0$0$2.7M
Jun 2026$2.7M$0$0$2.7M
Jul 2026$0$0$0$0
Aug 2026$0$0$0$0
Sep 2026$0$0$0$0
Oct 2026$0$0$0$0
Is this normal? Selling year by year5 earlier years to compare with

Less than usual: about one-fifth of the 5-year average. 5 insiders sold; the average is 5 a year.

12 months endingShares soldInsiders who soldProceeds
Oct 9, 2026
Latest 12 months
39K5$8.9M
Oct 9, 2025
1 year earlier
83K7$11.1M
Oct 9, 2024
2 years earlier
69K6$8.7M
Oct 10, 2023
3 years earlier
75K4$7.6M
Oct 10, 2022
4 years earlier
60K3$4.5M
Oct 10, 2021
5 years earlier
769K5$51.0M

Open-market sales (Form 4 code S) by people who were officers or directors, in split-adjusted shares. Earlier years include people who have since left. A sale that an outside holder also reports (a family trust, a fund) is counted with outside holders in every year. Shares, not dollars, are compared, so a change in the stock price doesn't look like a change in selling. Years the filings don't fully cover are shown but left out of the average.

Known gaps and uncertaintyEvery officer and director reconciles

Every officer and director reconciles for this period.

Inferred rename: "Estate" is treated as the same holder as "As Executor of Spouse's Estate", because the old name was never reported again and the new one opened with the same balance (310,000 shares). Old name, new name

Inferred rename: "Custodian for minor child" is treated as the same holder as "Custodian for child", because the old name was never reported again and the new one opened with the same balance (10,676 shares). Old name, new name

External context: we only cite outside events when a documented connection exists. None is shown for this period.

Sources and methodology1,827 filings from SEC EDGAR, and how we read them

All 1,827 Forms 3, 4 and 5 filed for Steel Dynamics (SEC CIK 1022671) from Nov 20, 1996 to Aug 14, 2026, retrieved from SEC EDGAR on Oct 9, 2026. Prices are the ones reported in each filing, often weighted averages. 18 older filings exist only on paper and could not be read.

Probable 2-for-1 stock split on or before Nov 21, 2006 (first filing that shows post-split balances). Splits aren't reported as transactions; 16 holding lines changed by exactly this ratio, so earlier share counts are restated.

Probable 2-for-1 stock split on or before Mar 19, 2008 (split date stated in a footnote). Splits aren't reported as transactions; 9 holding lines changed by exactly this ratio, so earlier share counts are restated.

Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.

Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".

Full methodology

Former or inactive filers (24)No filing in 18 months; last reported balances, not in any total
NameLast filedLast reported balance
James MarcuccilliOct 11, 202461,985 shares, last reported balance as of Oct 11, 2024
Steven SonnenbergApr 15, 202422,561 shares, last reported balance as of Apr 12, 2024
Keith BusseApr 18, 20231,306,717 shares, last reported balance as of Apr 14, 2023
Russell RinnAug 31, 2022303,502 shares, last reported balance as of Aug 29, 2022
Frank ByrneApr 22, 202282,326 shares, last reported balance as of Apr 21, 2022
Jurgen KolbApr 16, 201936,533 shares, last reported balance as of Apr 12, 2019
STEEL DYNAMICS INCFeb 13, 2019No balance on record
John BatesJul 11, 201730,898,883 shares, last reported balance as of Jul 7, 2017
Paul EdgerleyNov 20, 20155,201,856 shares, last reported balance as of Nov 18, 2015
James TretheweyOct 15, 201318,157 shares, last reported balance as of Oct 11, 2013
Richard FreelandJan 15, 201374,691 shares, last reported balance as of Jun 1, 2012
Gary HeasleyNov 26, 201273,870 shares, last reported balance as of Nov 21, 2012
Joseph RuffoloJun 3, 201147,936 shares, last reported balance as of Jun 2, 2010
John NolanMay 23, 2008112,916 shares, last reported balance as of Mar 5, 2008
Daniel RifkinMay 23, 20085,635,534 shares, last reported balance as of Oct 26, 2007
Bert HollmanMay 23, 2008660 shares, last reported balance as of Feb 21, 2008
Richard BradyMay 23, 200812,046 shares, last reported balance as of Feb 1, 2008
Thomas CrawfordMay 23, 200889,198 shares, last reported balance as of Feb 1, 2008
Timothy DukeMay 23, 200871,192 shares, last reported balance as of Feb 1, 2008
Mary FinkMay 23, 20086,754 shares, last reported balance as of Feb 28, 2008
Thomas HartmanFeb 5, 200815,346 shares, last reported balance as of Feb 1, 2008
Naoki HidakaMay 23, 20052,096,788 shares, last reported balance as of Feb 27, 2004
James KelleyNov 23, 2004No balance on record
Tracy ShellabargerMay 25, 20041,021,416 shares, last reported balance as of May 18, 2004

Spotted something wrong on this page? Report an error. We check every report against the SEC filing and list what we fix in the corrections log.