SEC ownership of HMH Holding Inc

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002021880.

Comparable stake leader

PRICE T ROWE ASSOCIATES INC /MD/

Disclosed value leader

PRICE T ROWE ASSOCIATES INC /MD/

Comparable rows

4/22

Latest evidence

31 Jul 2026

Top shareholders Insider holders Latest transactions
Public ticker
HMH on Nasdaq
Parsed ownership sources
13D/G and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder
PRICE T ROWE ASSOCIATES INC /MD/
Ranking: Comparable ownership first, then disclosed value
Ownership snapshot CIK-linked ownership evidence from parsed SEC filings. 3 signals
Comparable ownership rows
4 of 22
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder
PRICE T ROWE ASSOCIATES INC /MD/
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date
31 Jul 2026
Freshness: Most recent filing date in this holder set
Issuer Names, identifiers, and filing context for this profile. 2 identity fields
Issuer CIK
0002021880
Issuer location
Houston, TX

Ownership snapshot

Top shareholders of HMH Holding Inc (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
PRICE T ROWE ASSOCIATES I...
Disclosed value leader
PRICE T ROWE ASSOCIATES I...
Comparable rows
4/22
Latest evidence
31 Jul 2026
13D/G 3/4/5 Lead comparable stake: 24% 18 rows are not safely comparable across share classes. 13D/G row: PRICE T ROWE ASSOCIATES INC /MD/ Showing 1-8 of 22 holder rows.

Quick read

PRICE T ROWE ASSOCIATES INC /MD/ leads the comparable SEC ownership view at 24%.

4 of 22 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 PRICE T ROWE ASSOCIATES INC /MD/'s linked filing trail.
Comparable ownership Top 4
PRICE T ROWE ASSOCIATES INC /MD/ 24%
FMR LLC 12%
BlackRock, Inc. 6.5%
MILLENNIUM MANAGEMENT LLC 1.4%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 22 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
PRICE T ROWE ASSOCIATES INC /MD/
13D/G
T. Rowe Price Associates, Inc.
13D/G
24%
$52,255,890
2,788,468 shares
 $0 31 Jul 2026
FMR LLC
13D/G
13D/G
12%
$24,737,793
1,320,053 shares
 $0 31 Jul 2026
BlackRock, Inc.
13D/G
13D/G
6.5%
$13,834,505
738,234 shares
 $0 30 Jun 2026
MILLENNIUM MANAGEMENT LLC
13D/G
13D/G
1.4%
$3,608,852
160,894 shares
 $0 30 Jun 2026
As Akastor
3/4/5
Director, Director by Deputization, 10%+ Owner
3/4/5
—
mixed-class rows
—
64,469,148 shares
mixed-class rows
 — 30 Apr 2026
Asa Akastor
3/4/5
10%+ Owner
3/4/5
—
mixed-class rows
—
64,469,148 shares
mixed-class rows
 — 30 Apr 2026
Baker Hughes Co
3/4/5
Director, Director by Deputization, 10%+ Owner
3/4/5
—
mixed-class rows
—
64,469,148 shares
mixed-class rows
 — 30 Apr 2026
Baker Hughes Holdings LLC
3/4/5
Director, Director by Deputization, 10%+ Owner
3/4/5
—
mixed-class rows
—
64,469,148 shares
mixed-class rows
 — 30 Apr 2026
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.

Forms 3/4/5 flow

Insider trading overview

Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 14 Aug 2025.

Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value Sell value
Shares: 0 Shares: 0
Window (months) Buy shares Sell shares Buy value Sell value Net value
0-3 0 0 $0 $0 $0
3-6 0 0 $0 $0 $0
6-9 0 0 $0 $0 $0
9-12 0 0 $0 $0 $0

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-20 of 20 reporting-owner rows connected to HMH Holding Inc. Open a relationship link for the CIK-to-CIK filing trail.

Rows
20
Largest Forms 3/4/5 holder
As Akastor
Net 12M change
$0
Latest report
18 May 2026
Name Relationship Holdings Value Past Year Net Change Change % Valuation Report Date
As Akastor Director, Director by Deputization, 10%+ Owner Mixed 30 Apr 2026
Mercury HoldCo AS 10%+ Owner Mixed 30 Apr 2026
Mercury HoldCo Inc. Director, Director by Deputization, 10%+ Owner Mixed 30 Apr 2026
Asa Akastor 10%+ Owner Mixed 30 Apr 2026
Roy A. Dyrseth Chief Commercial Officer Mixed 18 May 2026
E. Charls Chauviere Chief Operations Officer Mixed 18 May 2026
Daniel Wayne Rabun Director Mixed 02 Apr 2026
Baker Hughes Co Director, Director by Deputization, 10%+ Owner Mixed 30 Apr 2026
Baker Hughes Holdings LLC Director, Director by Deputization, 10%+ Owner Mixed 30 Apr 2026
Dwight W. Rettig Chf Admn Officer, GC, Corp Sec Mixed 18 May 2026
Thomas W. McGee Chief Financial Officer Mixed 18 May 2026
Judson E. Bailey Director Mixed 31 Mar 2026
Karl Erik Kjelstad Director Mixed 02 Apr 2026
Hunain Qureshi Chief Accounting Officer Mixed 18 May 2026
Svein Oskar Stoknes Director Mixed 02 Apr 2026
Eirik Bergsvik Chief Executive Officer Mixed 18 May 2026
Pal Skogerbo Chief Technology Officer Mixed 18 May 2026
Maria Georgia Magno Director Mixed 31 Mar 2026
Kathleen S. McAllister Director Mixed 02 Apr 2026
Lance Loeffler Director Mixed 02 Apr 2026

Recent insider transactions for HMH Holding Inc

Showing up to 300 recent insider transactions from the last 12 months.

Insider Symbol Class Transaction % SEC-reported value SEC-reported price Shares Shares owned Date Ownership
Pal Skogerbo HMH Class A Common Stock Award 28.5% 13,398 60,429 19 Jun 2026 Direct
Eirik Bergsvik HMH Class A Common Stock Award 51.6% 48,232 141,669 19 Jun 2026 Direct
E. Charls Chauviere HMH Class A Common Stock Award 29.1% 20,096 89,109 19 Jun 2026 Direct
Thomas W. McGee HMH Class A Common Stock Award 18.9% 24,116 151,810 19 Jun 2026 Direct
Dwight W. Rettig HMH Class A Common Stock Award 31% 24,116 101,810 19 Jun 2026 Direct
Hunain Qureshi HMH Class A Common Stock Award 18.4% 4,019 25,904 19 Jun 2026 Direct
Roy A. Dyrseth HMH Class A Common Stock Award 34.7% 18,757 72,788 19 Jun 2026 Direct
Pal Skogerbo HMH Class A Common Stock Tax liability -36.2% -26,713 47,031 18 May 2026 Direct
Eirik Bergsvik HMH Class A Common Stock Tax liability -35.6% -51,559 93,437 18 May 2026 Direct
E. Charls Chauviere HMH Class A Common Stock Tax liability -33.1% -34,147 69,013 18 May 2026 Direct
Thomas W. McGee HMH Class A Common Stock Tax liability -23.8% -39,779 127,694 18 May 2026 Direct
Dwight W. Rettig HMH Class A Common Stock Tax liability -33.9% -39,779 77,694 18 May 2026 Direct
Hunain Qureshi HMH Class A Common Stock Tax liability -26.3% -7,798 21,885 18 May 2026 Direct
Roy A. Dyrseth HMH Class A Common Stock Tax liability -33.1% -26,713 54,031 18 May 2026 Direct
Dwight W. Rettig HMH Class A Common Stock Award 20.7% 20,135 117,473 05 May 2026 Direct
E. Charls Chauviere HMH Class A Common Stock Award 20.7% 17,682 103,160 05 May 2026 Direct
Eirik Bergsvik HMH Class A Common Stock Award 19% 23,138 144,996 05 May 2026 Direct
Hunain Qureshi HMH Class A Common Stock Award 20.7% 5,089 29,683 05 May 2026 Direct
Pal Skogerbo HMH Class A Common Stock Award 20.4% 12,468 73,744 05 May 2026 Direct
Thomas W. McGee HMH Class A Common Stock Award 13.7% 20,135 167,473 05 May 2026 Direct
Roy A. Dyrseth HMH Class A Common Stock Award 18.3% 12,468 80,744 05 May 2026 Direct
Akastor ASA HMH Class B Common Stock Other -1.06% -171,461 15,945,826 30 Apr 2026 Akastor AS See footnotes
Asa Akastor HMH Class B Common Stock Other -1.06% -171,461 15,945,826 30 Apr 2026 Akastor AS See footnotes
Asa Akastor HMH Class B Common Stock Other -1.06% -171,461 15,945,826 30 Apr 2026 Akastor AS See footnotes
Asa Akastor HMH Class B Common Stock Other -1.06% -171,461 15,945,826 30 Apr 2026 Akastor AS See footnotes
Akastor ASA HMH Class B Common Stock Other -1.05% -171,461 16,117,287 30 Apr 2026 Mercury HoldCo Inc. See footnotes
Asa Akastor HMH Class B Common Stock Other -1.05% -171,461 16,117,287 30 Apr 2026 Mercury HoldCo Inc. See footnotes
Asa Akastor HMH Class B Common Stock Other -1.05% -171,461 16,117,287 30 Apr 2026 Mercury HoldCo Inc. See footnotes
Asa Akastor HMH Class B Common Stock Other -1.05% -171,461 16,117,287 30 Apr 2026 Mercury HoldCo Inc. See footnotes
Akastor ASA HMH B.V. Non-Voting Class B Shares Other -2.11% -342,922 15,945,826 30 Apr 2026 Akastor AS See footnotes
Asa Akastor HMH B.V. Non-Voting Class B Shares Other -2.11% -342,922 15,945,826 30 Apr 2026 Akastor AS See footnotes
Asa Akastor HMH B.V. Non-Voting Class B Shares Other -2.11% -342,922 15,945,826 30 Apr 2026 Akastor AS See footnotes
Asa Akastor HMH B.V. Non-Voting Class B Shares Other -2.11% -342,922 15,945,826 30 Apr 2026 Akastor AS See footnotes
Akastor ASA HMH B.V. Non-Voting Class A Shares Other -2.11% -342,922 15,945,826 30 Apr 2026 Mercury HoldCo Inc. See footnotes
Asa Akastor HMH B.V. Non-Voting Class A Shares Other -2.11% -342,922 15,945,826 30 Apr 2026 Mercury HoldCo Inc. See footnotes
Asa Akastor HMH B.V. Non-Voting Class A Shares Other -2.11% -342,922 15,945,826 30 Apr 2026 Mercury HoldCo Inc. See footnotes
Asa Akastor HMH B.V. Non-Voting Class A Shares Other -2.11% -342,922 15,945,826 30 Apr 2026 Mercury HoldCo Inc. See footnotes
Baker Hughes Co HMH Class B Common Stock Other -2.11% -342,922 15,945,826 30 Apr 2026 Baker Hughes Holdings LLC See footnotes
Baker Hughes Co HMH Class B Common Stock Other -2.11% -342,922 15,945,826 30 Apr 2026 Baker Hughes Holdings LLC See footnotes
Baker Hughes Co HMH B.V. Non-Voting Class B Shares Other -2.11% -342,922 15,945,826 30 Apr 2026 Baker Hughes Holdings LLC See footnotes
Baker Hughes Co HMH B.V. Non-Voting Class B Shares Other -2.11% -342,922 15,945,826 30 Apr 2026 Baker Hughes Holdings LLC See footnotes
Baker Hughes Co HMH B.V. Non-Voting Class A Shares Other -2.11% -342,922 15,945,826 30 Apr 2026 Baker Hughes Holdings LLC See footnotes
Baker Hughes Co HMH B.V. Non-Voting Class A Shares Other -2.11% -342,922 15,945,826 30 Apr 2026 Baker Hughes Holdings LLC See footnotes
Svein Oskar Stoknes HMH Class A Common Stock Award 8,486 8,486 02 Apr 2026 Direct
Roy A. Dyrseth HMH Class A Common Stock Purchase 13.3% 8,000 68,276 02 Apr 2026 Direct
Roy A. Dyrseth HMH Class A Common Stock Award 60,276 60,276 02 Apr 2026 Direct
Pal Skogerbo HMH Class A Common Stock Purchase 1.66% 1,000 61,276 02 Apr 2026 Direct
Pal Skogerbo HMH Class A Common Stock Award 60,276 60,276 02 Apr 2026 Direct
Lance Loeffler HMH Class A Common Stock Purchase 58.9% 5,000 13,486 02 Apr 2026 Direct
Lance Loeffler HMH Class A Common Stock Award 8,486 8,486 02 Apr 2026 Direct
* marks a reported price that did not pass the local price check.
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