Monitor for actual execution of this sale in subsequent Form 4 filings; a completed sale of this size by a major pre-IPO holder could create near-term selling pressure. Given the company's strong institutional support (78% analyst bullish) and the seller's status as a venture investor rather than management, the signal is moderate—watch for any acceleration of insider selling patterns.
Price Chart
Executive Summary
Summit Partners Growth Equity Fund IX-A, L.P., a major pre-IPO investor in LifeStance Health Group, Inc., filed a Form 144 on August 10, 2026, indicating intent to sell 1,742,770 shares of common stock, with an approximate market value of $18.5 million based on the filing date. This is a significant secondary sale by a large insider affiliate, representing about 0.46% of the company's $4.2B market cap, and may signal a gradual exit by a long-term investor, though the sale is not yet executed and could be adjusted.
Key Facts
- Summit Partners Growth Equity Fund IX-A, L.P. filed Form 144 to sell 1,742,770 shares of LFST common stock.
- Estimated aggregate market value of the proposed sale is $18,508,217.40, based on the filing date.
- Shares were acquired pre-IPO on June 10, 2021, through equity interests purchased before the IPO.
- The selling entity is a major institutional affiliate and pre-IPO investor, not a company executive.
- The filing represents approximately 0.46% of LFST's $4.2B market cap, a notable but not overwhelming proportion.
- The proposed sale is scheduled for August 10, 2026, and will be executed through Citadel Securities LLC on NASDAQ.
Financial Impact
Proposed sale of 1,742,770 shares valued at approximately $18.5 million, representing about 0.46% of the company's $4.2B market cap.
Risk Factors
- The proposed sale may not be completed; Form 144 is an intent to sell, not a guarantee.
- If executed, the sale could signal a gradual exit by a key pre-IPO investor, potentially weighing on sentiment.
- The filing does not disclose the seller's remaining holdings, limiting assessment of proportional impact.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 144 Filing (Primary) | 0001634415-26-000002 |
| Document: 0001634415-26-000002-index.html | 0001634415-26-000002 |
| Document: 0001634415-26-000002.txt | 0001634415-26-000002 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 20, 2026 7d ago | Court Ruling | $12.33 $12.56 | ▲ +1.87% | ▲ +3.05% | $13.10 (+6.24%) |
Oct 16, 2026 11d ago | 8-K | $11.77 $12.22 | ▲ +3.82% | ▲ +3.49% | $13.10 (+11.30%) |
Oct 15, 2026 12d ago | Press Release | $11.74 | awaiting T+1 | — | $13.10 (+11.58%) |
Oct 5, 2026 22d ago | SC 13G/A | $12.22 $12.12 | ▼ −0.82% | ▼ −1.37% | $13.10 (+7.20%) |
Sep 22, 2026 5w ago | Institutional Cluster | $12.55 $12.08 | ▼ −3.75% | ▼ −3.02% | $13.10 (+4.38%) |
Sep 11, 2026 6w ago | 8-K | $13.38 $13.06 | ▲ +2.39% | ▲ +1.93% | $13.10 (+2.09%) |
Aug 18, 2026 10w ago | Insider Cluster | $12.83 $12.65 | ▲ +1.40% | ▲ +0.56% | $13.10 (−2.10%) |
Aug 14, 2026 10w ago | Insider Cluster | $12.55 $12.36 | ▲ +1.51% | ▲ +0.84% | $13.10 (−4.38%) |
Aug 14, 2026 10w ago | 144 | $12.42 $12.55 | ▲ +1.05% | ▲ +1.52% | $13.10 (+5.48%) |
Aug 13, 2026 10w ago | Insider Cluster | $12.42 $12.55 | ▼ −1.05% | ▼ −1.52% | $13.10 (−5.48%) |
US Market Status
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