Among active 13F managers last quarter, 21 opened and none reduced or exited; the largest holder to move was Price T Rowe Associates Inc (new position). Over the last 180 days, 5 insiders bought and none sold, a net +$1.5M in open-market trades.
Funds lean in and no leg opposes.
31 tracked 13F filers disclose a position in HMH as of the latest SEC 13F filings, a combined $138.5M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Shares | Position value | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Price T Rowe Associates Inc | 2.8M | $52.6M | ▲New +2.8M sh | Q2 2026 | |
| 2 | BlackRock, Inc. | 738K | $13.8M | ▲New +738K sh | Q2 2026 | |
| 3 | T. Rowe Price Investment Management, Inc. | 694K | Withheld | ▲New +694K sh | Q2 2026 | |
| 4 | Citadel Advisors LLC | 674K | $12.6M | ▲New +674K sh | Q2 2026 | |
| 5 | FMR LLC | 564K | $10.6M | ▲New +564K sh | Q2 2026 | |
| 6 | Vanguard Capital Management LLC | 474K | $8.9M | ▲New +474K sh | Q2 2026 | |
| 7 | GeoSphere Capital Management, LLC | 375K | $7.0M | ▲New +375K sh | Q2 2026 | |
| 8 | Alyeska Investment Group, L.P. | 300K | $5.6M | ▲New +300K sh | Q2 2026 | |
| 9 | Cannell & Spears LLC | 277K | $5.2M | ▲New +277K sh | Q2 2026 | |
| 10 | Geode Capital Management, LLC | 273K | $5.1M | ▲New +273K sh | Q2 2026 | |
| 11 | Thomist Capital Management, LP | 158K | $3.0M | ▲New +158K sh | Q2 2026 | |
| 12 | Marex Group Ltd | 127K | $2.4M | ▲New +127K sh | Q2 2026 | |
| 13 | Ghisallo Capital Management LLC | 125K | $2.3M | ▲New +125K sh | Q2 2026 | |
| 14 | Walleye Capital LLC | 83K | $1.6M | ▲New +83K sh | Q2 2026 | |
| 15 | Readystate Asset Management LP | 80K | $1.5M | ▲New +80K sh | Q2 2026 | |
| 16 | Vanguard Fiduciary Trust Co | 74K | $1.4M | ▲New +74K sh | Q2 2026 | |
| 17 | Vanguard Portfolio Management LLC | 69K | $1.3M | ▲New +69K sh | Q2 2026 | |
| 18 | LMR Partners LLP | 60K | $1.1M | ▲New +60K sh | Q2 2026 | |
| 19 | Woodline Partners LP | 40K | $750K | ▲New +40K sh | Q2 2026 | |
| 20 | Weiss Asset Management LP | 30K | $562K | ▲New +30K sh | Q2 2026 | |
| 21 | Capricorn Fund Managers Ltd | 21K | $394K | ▲New +21K sh | Q2 2026 | |
| 22 | Tudor Investment Corp Et Al | 16K | $298K | ▲New +16K sh | Q2 2026 | |
| 23 | Texas Permanent School Fund Corp | 10K | $187K | ▲New +10K sh | Q2 2026 | |
| 24 | MetLife Investment Management, LLC | 7K | $123K | ▲New +7K sh | Q2 2026 | |
| 25 | Vanguard Global Advisers, LLC | 5K | $99K | ▲New +5K sh | Q2 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership. 1 value row is withheld because the reported units disagree with same-security peers; share counts are unchanged.
Last quarter, 21 funds opened a new position in HMH, while none reduced or exited. Based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Their position there |
|---|---|---|
| Alphabet Inc-CL AGOOGL | 17 funds | $38.7B |
| Microsoft CorpMSFT | 17 funds | $37.0B |
| Amazon.com IncAMZN | 17 funds | $31.1B |
| Micron Technology IncMU | 17 funds | $19.3B |
| Nvidia CorpNVDA | 16 funds | $80.8B |
| Eli Lilly & CoLLY | 16 funds | $18.6B |
| Tesla IncTSLA | 16 funds | $12.6B |
| Arista Networks IncANET | 16 funds | $5.2B |
| Abbott LaboratoriesABT | 16 funds | $3.3B |
| Merck & Co. Inc.MRK | 16 funds | $3.2B |
| Valero Energy CorpVLO | 16 funds | $1.2B |
| Cerebras Systems Inc - ACBRS | 16 funds | $1.1B |
Ranked by how many of HMH's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in HMH.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Apr 2, 2026 | Bergsvik Eirik | Chief Executive Officer | Buy (P) | 10K | $200K |
| Apr 2, 2026 | Dyrseth Roy A. | Chief Commercial Officer | Buy (P) | 8K | $160K |
| Apr 2, 2026 | Loeffler Lance | Director | Buy (P) | 5K | $100K |
| Apr 2, 2026 | McGee Thomas W. | Chief Financial Officer | Buy (P) | 50K | $1.0M |
| Apr 2, 2026 | Skogerbo Pal | Chief Technology Officer | Buy (P) | 1K | $20K |
Where institutional funds (13F), corporate insiders (Form 4) and US House members (STOCK Act) are buying or selling the same name in the same window. Green is buying, red is selling.
Insiders and Congress: last 180 days. Funds: latest 13F, top 100 holders incl. passive
| Source | Buying | Selling | Net |
|---|---|---|---|
13F funds Top 100 holders by value, passive included; the hero counts active managers only | 0 | 0 | – |
Insiders Form 4 open-market | 5 | 0 | +$1.5M |
US House STOCK Act trades | 0 | 0 | $0 |
Capital Rotation reports where institutional capital disclosed rotating, as of the latest public SEC 13F filings. It is data, not investment advice, a recommendation, or a prediction. Filings lag about 45 days and cover long US equity positions only. Past disclosed flows do not indicate future prices. Do your own research; consult a licensed advisor.
Connected entities for HMH
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/HMH/capital-change-brief"
Use Arkolith's capital_change_brief for HMH. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for HMH. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.