ESSEX INVESTMENT MANAGEMENT CO LLC
Position in OSG — Octave Specialty Group Inc
CIK 201772
BOSTON, MA
Position in OSG
as of Jun 30, 2026
· filed Aug 6, 2026
Position Value
$3,365,163
+$1,420,520 QoQ
Shares Held
539,289
+29.0% QoQ
Ownership
1.20%
of shares outstanding
% of Portfolio
0.45%
of 13F equity value
Holder Rank
#17
of 147 holders
Holding Since
Dec 2025
3 quarters on record
Voting authority
Sole 54%
Shared 0%
None 46%
Common Shares in OSG Over Time
Shares Held
Position Value (USD)
Position in Insurance - Specialty
Financial Services · as of Jun 30, 2026ESSEX INVESTMENT MANAGEMENT CO LLC holds $3,365,163 across 1 Insurance - Specialty name. OSG ranks #1 (100.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | OSG |
Octave Specialty Group Inc
This page
|
539,289 | $3,365,163 |
All Filings in OSG
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3 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $3,365,163 | 539,289 | Shares | Sole | 2026-08-06 | |
| 2026-03-31 | $1,944,643 | 418,203 | Shares | Sole | 2026-05-11 | |
| 2025-12-31 | $3,196,195 | 410,822 | Shares | Sole | 2026-02-13 | |
| No filing history on record for this holder in this stock. | ||||||