13D Management
In short: 13D Management LLC is a small New York investment adviser focused on shareholder activism, founded by Ken Squire. It is not a dating company. It matters to the dating industry as an institutional holder that, according to a 13F filing, sold its whole Match Group stake in the fourth quarter of 2025, a small data point on investor sentiment.
Key facts
| Type | Investor |
|---|---|
| Headquarters | New York, United States |
| Founded | 2011 |
| Status | Active |
| Website | 13dactivistfund.com |
| LinkedIn profile | |
| Business type | New York based boutique asset management firm focused on shareholder activism; privately held [13D Management LLC, LinkedIn] |
| Founded | 2011 (per LinkedIn; one Yahoo Finance fund profile says 2010) [13D Management LLC, LinkedIn, 2011] |
| Founder and portfolio manager | Ken Squire, founder of 13D Monitor and the 13D Activist Fund [Principal Management, 13D Monitor] |
| Address | 152 West 57th Street, 16th Floor, New York, NY 10019 [EDGAR filing 0001172661-26-000830 (Form 13F-HR), 17 February 2026] |
| SEC adviser registration | SEC registered investment adviser, CRD 154009, SEC number 801-130908, registration approved 12 August 2024 [13D Management LLC, IAPD, 12 August 2024] |
| Match Group stake exit | 13F-HR filed 17 February 2026 for the period ending 31 December 2025; Motley Fool reports 13D Management sold its entire Match Group holding of 132,779 shares in the fourth quarter, with a value change of $4.69 million [13D Management Exits Match Group After Selling $4.7 Million , 17 February 2026] |
| 13F reportable assets | $84.05 million across 16 positions after the filing [Motley Fool, 17 February 2026] |
| DII coverage | DII reported on 11 March 2026 that 13D sold its Match Group stake, but gave Q4 2024 and 64,350 shares, which conflict with the SEC filing period (31 December 2025) and the Motley Fool share count [Dating Industry Insights, 11 March 2026] |
About 13D Management
13D Management LLC is a privately held investment adviser based at 152 West 57th Street, New York. LinkedIn describes it as a boutique asset management firm focused on shareholder activism, founded in 2011. Its founder and portfolio manager is Ken Squire, who also founded the research service 13D Monitor and the 13D Activist Fund, an event driven mutual fund that invests in companies named in activist investors' 13D filings. The firm is registered with the US Securities and Exchange Commission as an investment adviser, with registration approved on 12 August 2024.
The firm has no products in online dating. Its link to the sector is as a public market investor. A 13F filing made on 17 February 2026, for the period ending 31 December 2025, showed that 13D Management sold its entire holding in Match Group, the owner of Tinder and Hinge, during the fourth quarter. Motley Fool reported the sale as 132,779 shares, with a value change of $4.69 million, and said the fund reported 16 positions and $84.05 million of reportable assets after the filing.
Dating Industry Insights reported the exit on 11 March 2026. Its article dates the sale to the fourth quarter of 2024 and gives 64,350 shares. The SEC filing period and the Motley Fool report point to the fourth quarter of 2025, so those details in the DII article should not be relied on. The stake was small next to Match Group's size, so it is best read as one fund's portfolio decision.
Stories about 13D Management
- 13D Exited Match Group. The Subscription Model Is What They Lost Faith In.
13D Management sold its entire Match Group stake, 64,350 shares worth $4.69M, in Q4 2024, according to SEC filings.
Questions about 13D Management
What is 13D Management?
13D Management LLC is a New York based investment adviser focused on shareholder activism. It was founded by Ken Squire, who also runs 13D Monitor and the 13D Activist Fund.
Is 13D Management a dating company?
No. It is an asset manager. It appears in dating industry coverage because it held, then sold, shares in Match Group.
When did 13D Management sell its Match Group shares?
A 13F filing made on 17 February 2026 for the period ending 31 December 2025 shows the exit in the fourth quarter of 2025. Motley Fool reported the holding as 132,779 shares.
What does 13D Management do?
13D Management LLC is a small New York investment adviser focused on shareholder activism, founded by Ken Squire. It is not a dating company.
Where is 13D Management based?
13D Management is based in New York, United States.
When was 13D Management founded?
13D Management was founded in 2011.
Also known as: 13D.