Institutional filer · SEC 13F · Q3 2025
Little Harbor Advisors, LLC
The reported 13F portfolio of Little Harbor Advisors, LLC (CIK 1539639) - top holdings, how concentrated the book is, and what changed last quarter.
- $200K
- Reported book
- 8
- Positions
- #352
- of 360 filers
The verdict
According to SEC Form 13F-HR filings in this corpus, Little Harbor Advisors, LLC ranks #352 of 360 institutional filers by reported book value (largest first), matching the /funds listing. As of Q3 2025 the reported book is $200K across 8 positions, a concentrated portfolio led by a few core positions.
- $200K
- reported 13F value
- 8
- disclosed positions
- 75.0%
- in SPDR S&P 500 ETF TR
- #352
- of 360 filers
Top-5 share 91.4% → TOP-HEAVY book (largest five positions vs the rest of the reported 13F book).
According to SEC Form 13F-HR filings in this corpus, Little Harbor Advisors, LLC ranks #352 of 360 institutional filers by reported book value (largest first), matching the /funds listing.
Where Little Harbor Advisors, LLC sits by disclosed position count
Little Harbor Advisors, LLC reports 8 13F positions among 360 filers with holdings (inventory signal, not a quality ranking). Orthogonal to book-value rank.
Little Harbor Advisors, LLC vs all filers by holding count
Where this filer's disclosed position inventory sits among every tracked 13F manager
8 340th of 360 higher than 20 of 360 filers
Filers, banded by disclosed position count
Each bar is a band; taller bars hold more filers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source SEC Form 13F-HR filings · 2026-05-16
How 13F filings are computed · All institutional filers · Largest filers by value
SEC Form 13F-HR filing desk
CIK 1539639 · Q3 2025 $0M book
BOOK-LIGHT · POS-CORE · CONC-DOM · LEAD-DOM · PHOTO-UNK · TREND-FLAT · FY-SNAPSHOT
- BOOK-LIGHT #352/360
- POS-CORE 8 names
- CONC-DOM 91% top-5
- LEAD-DOM 75.0% SPDR S&P 500 ETF TR
- PHOTO-UNK No peer
- TREND-FLAT Book steady
- FY-SNAPSHOT Q3 2025
Read with: Ownership concentration guide - Little Harbor Advisors, LLC's top-five positions weigh 91% of its reported book — read concentration before inferring strategy.
How the reported book breaks down
$200K decomposed into the top 5 reported positions (shown below) versus every other disclosed position.
Top Reported Holdings
| # | Security | Value | % of book |
|---|---|---|---|
| 1 | SPDR S&P 500 ETF TR | $150K | 75.0% |
| 2 | INVESCO QQQ TR | $15K | 7.7% |
| 3 | SPDR SERIES TRUST | $6K | 2.9% |
| 4 | ISHARES TR | $6K | 2.9% |
| 5 | SSGA ACTIVE ETF TR | $6K | 2.9% |
| 6 | SPDR SER TR | $6K | 2.9% |
| 7 | FIRST TR EXCHANGE-TRADED FD | $6K | 2.9% |
| 8 | ISHARES TR | $6K | 2.8% |
Latest Quarter Trades · Q3 2025
New positions (8)
Frequently Asked Questions
- How big is Little Harbor Advisors, LLC's 13F portfolio?
- Little Harbor Advisors, LLC reports $200K of long US-equity positions across 8 securities as of Q3 2025. This reflects 13F-disclosed holdings only, it is not the firm's total assets under management.
- Where does Little Harbor Advisors, LLC sit among tracked 13F filers?
- According to SEC Form 13F-HR filings in this corpus, Little Harbor Advisors, LLC ranks #352 of 360 institutional filers by reported book value (largest first), matching the /funds listing. The ordinal is recomputed live from filers with reported book value > 0. See /methodology/#corpus-placement.
- What is Little Harbor Advisors, LLC's largest position?
- Little Harbor Advisors, LLC's largest reported position is SPDR S&P 500 ETF TR at $150K, about 75.0% of its reported book as of Q3 2025.
- What did Little Harbor Advisors, LLC trade last quarter?
- In its Q3 2025 filing, Little Harbor Advisors, LLC opened 8 new positions. Each change is drawn from a line in the firm's 13F-HR filing and can be verified on SEC EDGAR.
Using this filing
- The rankings sort every tracked filer the same way Little Harbor Advisors, LLC was placed above, so you can see exactly how the rest of the field compares. View the rankings
- 13F book size and holding count both vary widely by manager, see how Little Harbor Advisors, LLC stacks up against the full filer population. Browse filers
- 13F-HR reports long US-listed equity positions only, not total AUM, short positions, or non-equity holdings, treat the reported book as a partial picture. Read the methodology
Form 13F-HR discloses long US-listed equity positions of managers with $100M+ qualifying assets, filed within 45 days of period end. Reported value is not total AUM.
Source: U.S. Securities and Exchange Commission (SEC) - EDGAR Form 13F-HR institutional holdings filings · Q3 2025 13F-HR discloses long US-listed equity positions of managers with $100M+ qualifying assets, filed within 45 days of period end. Reported value is not total AUM.
PlainFundData is rendered directly from SEC EDGAR Form 13F-HR institutional holdings filings, no number is typed in by an editor. Filer holdings, changes, and reported book on this page are aggregated live from those 13F-HR extracts. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-05-16.