Among active 13F managers last quarter, 1 opened and 2 added, while 4 reduced; the largest holder to move was Opaleye Management Inc. (+13%). Over the last 180 days, 3 insiders bought and none sold, a net +$4.3M in open-market trades.
The legs disagree, or only one of them leans.
25 tracked 13F filers disclose a position in ACOG as of the latest SEC 13F filings, a combined $75.9M 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 | Opaleye Management Inc. | 2.9M | $20.9M | ▲+13% Added · +334K sh | Q2 2026 | |
| 2 | Solas Capital Management, LLC | 1.9M | $13.9M | —Held | Q2 2026 | |
| 3 | AWM Investment Company, Inc. | 1.7M | $12.1M | —Held | Q2 2026 | |
| 4 | Cable Car Capital, LP | 1.4M | $10.0M | —Held | Q2 2026 | |
| 5 | Ikarian Capital, LLC | 836K | $6.0M | ▼−21% Reduced · −220K sh | Q2 2026 | |
| 6 | Sphera Funds Management LTD. | 546K | $3.9M | ▼−3.8% Reduced · −22K sh | Q2 2026 | |
| 7 | Alyeska Investment Group, L.P. | 365K | $2.6M | —Held | Q2 2026 | |
| 8 | Aristides Capital LLC | 219K | $1.6M | —Held | Q2 2026 | |
| 9 | Boothbay Fund Management, LLC | 189K | $1.4M | ▼−26% Reduced · −67K sh | Q2 2026 | |
| 10 | Cantor Fitzgerald, L. P. | 189K | $1.0M | ▲+15% Added · +25K sh | Q1 2026 | |
| 11 | Citadel Advisors LLC | 98K | $704K | ▲+8.9% Added · +8K sh | Q2 2026 | |
| 12 | Villere ST Denis J & Co LLC | 71K | $514K | —Held | Q2 2026 | |
| 13 | Tudor Investment Corp Et Al | 62K | $445K | —Held | Q2 2026 | |
| 14 | Act Capital Management, LLC | 52K | $372K | —Held | Q2 2026 | |
| 15 | Berkshire Asset Management LLC | 20K | $143K | —Held | Q2 2026 | |
| 16 | Two Sigma Investments, LP | 16K | $87K | ▼−72% Reduced · −42K sh | Q1 2026 | |
| 17 | Geode Capital Management, LLC | 12K | $87K | —Held | Q2 2026 | |
| 18 | Raymond James Financial Inc | 10K | $55K | ▲New +10K sh | Q1 2026 | |
| 19 | National Bank Of Canada | 5K | $28K | —Held | Q1 2026 | |
| 20 | Allworth Financial LP | 750 | $4K | —Held | Q1 2026 | |
| 21 | Royal Bank Of Canada | 679 | $4K | ▲+457% Added · +557 sh | Q1 2026 | |
| 22 | UBS Group AG | 438 | $2K | ▼−53% Reduced · −489 sh | Q1 2026 | |
| 23 | Steward Partners Investment Advisory, LLC | 200 | $1K | —Held | Q2 2026 | |
| 24 | Jones Financial Companies LLLP | 100 | $508 | ▲New +100 sh | Q1 2026 | |
| 25 | Harbour Investments, Inc. | 4 | $25 | ▲New +4 sh | Q1 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.
Last quarter, 1 fund opened a new position in ACOG and 2 added to an existing one, while 4 reduced. 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 |
|---|---|---|
| Amazon.com IncAMZN | 11 funds | $4.9B |
| Microsoft CorpMSFT | 10 funds | $3.4B |
| Nvidia CorpNVDA | 9 funds | $5.5B |
| Alphabet Inc-CL AGOOGL | 9 funds | $2.6B |
| Micron Technology IncMU | 9 funds | $2.3B |
| Tesla IncTSLA | 9 funds | $2.3B |
| Meta Platforms Inc-Class AMETA | 8 funds | $2.2B |
| Broadcom IncAVGO | 8 funds | $2.1B |
| JPMorgan Chase & CoJPM | 8 funds | $2.0B |
| Abbott LaboratoriesABT | 8 funds | $1.7B |
| Palantir Technologies Inc-APLTR | 8 funds | $1.4B |
| Eli Lilly & CoLLY | 8 funds | $1.3B |
Ranked by how many of ACOG's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in ACOG.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Aug 21, 2026 | Wills Robert James | Director | Buy (P) | 10K | $96K |
| Aug 3, 2026 | Opaleye Management Inc. | 10% Owner | Buy (P) | 50K | $400K |
| Jul 31, 2026 | Opaleye Management Inc. | 10% Owner | Buy (P) | 3K | $23K |
| Jul 24, 2026 | Opaleye Management Inc. | 10% Owner | Buy (P) | 130 | $1K |
| Jul 23, 2026 | Opaleye Management Inc. | 10% Owner | Buy (P) | 50K | $389K |
| Jul 22, 2026 | Opaleye Management Inc. | 10% Owner | Buy (P) 2 lots, same day | 150K | $1.2M |
| Jun 26, 2026 | Opaleye Management Inc. | 10% Owner | Buy (P) | 152K | $975K |
| Jun 25, 2026 | Opaleye Management Inc. | 10% Owner | Buy (P) | 197 | $1K |
| Jun 15, 2026 | Opaleye Management Inc. | 10% Owner | Buy (P) | 5K | $27K |
| Jun 12, 2026 | Opaleye Management Inc. | 10% Owner | Buy (P) | 273 | $2K |
| Jun 11, 2026 | Opaleye Management Inc. | 10% Owner | Buy (P) | 3K | $17K |
| Jun 10, 2026 | Opaleye Management Inc. | 10% Owner | Buy (P) | 6K | $35K |
One row per insider, day and transaction code; shares and value are summed across the lots. Every lot is on the full insider page and in the filing.
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 | 4 | 5 | – |
Insiders Form 4 open-market | 3 | 0 | +$4.3M |
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.
No filings captured for this ticker in the live stream yet.
Connected entities for ACOG
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/ACOG/capital-change-brief"
Use Arkolith's capital_change_brief for ACOG. 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 ACOG. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.