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Mill Road Capital III, L.P.

CIK 1767199 · last filed 2026-03-16

Mill Road Capital III, L.P. is a corporate insider who has filed 26 SEC Form 4 insider transactions across 3 companies since 2021. The most recent filing shows the insider bought $1.1M of ALTG on Mar 16, 2026. Across all open-market trades the lifetime net is +$20.5M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $30.9M across reported positions. The firm reports its address in Greenwich, CT. 96 SEC filings were submitted jointly with Mill Road Capital III GP LLC.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$30.87M

Companies

3

Total Filings

26

Lifetime Open-Market Net

$20.50M

Filer Profile

Reported Address
334 PEMBERWICK ROAD
SECOND FLOOR
GREENWICH, CT 06831
Phone
(203) 987-3500
State of Incorporation
Cayman Islands
Related Filers
Mill Road Capital III GP LLC — 96 joint filings, latest 2026-05-19
THOMAS E LYNCH — 95 joint filings, latest 2026-05-19
Mill Road Capital II GP LLC — 32 joint filings, latest 2026-05-19
Mill Road Capital II, L.P. — 32 joint filings, latest 2026-05-19
Deven Petito — 2 joint filings, latest 2024-05-24
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
ALTG 10%+ Owner 4,373,208 $6.10 $26.68M $6.53M 6 2026-03-16
NDLS 10%+ Owner 293,141 $14.32 $4.20M $7.17M 5 2024-05-17
SUPERIOR INDUSTRIES INTERNATIONAL INC (SUP) Delisted 10%+ Owner 4,348,640 $0.32 $1.41M $6.80M 15 2023-09-12

Recent Filings

26 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-03-16 ALTG Buy (P) +185,880 $1.13M EDGAR
2026-03-13 ALTG Buy (P) +54,120 $344.3K EDGAR
2024-12-18 ALTG Exer (X) +105,600 $1.06M EDGAR
2024-08-05 ALTG Buy (P) +282,642 $2.71M EDGAR
2024-07-31 ALTG Mixed +226,458 $2.34M EDGAR
2024-06-17 ALTG Exer (X) +94,800 $1.19M EDGAR
2024-05-17 NDLS Other (J) +135,135 $0 EDGAR
2023-09-20 NDLS Exer (X) +881,000 $4.41M EDGAR
2023-09-12 SUPERIOR INDUSTRIES INTERNATIONAL INC (SUP) Delisted Exer (X) +45,000 $225.0K EDGAR
2023-08-23 SUPERIOR INDUSTRIES INTERNATIONAL INC (SUP) Delisted Exer (X) +600 $3.0K EDGAR
Showing 1–10 of 26
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.