System1, Inc. (SST) — Institutional Holders, Q2 2026
21 institutional investment managers reported a SST position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $1.4M. Every filer is listed below, ranked by position value. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
SST in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- VANGUARD CAPITAL MANAGEMENTAdded · +90,444 sh+$208.9K
- Crescent Grove AdvisorsNew · +75,545 sh+$174.5K
- BlackRockAdded · +19,106 sh+$44.1K
- MORGAN STANLEYNew · +13,134 sh+$30.3K
- Leonteq Securities AGNew · +12,500 sh+$28.9K
Biggest sellers
- CannaeSold out · -356,797 sh-$824.2K
- MILLENNIUM MANAGEMENTSold out · -32,619 sh-$75.4K
- NINE MASTS CAPITAL LtdSold out · -18,548 sh-$42.8K
- RENAISSANCE TECHNOLOGIESSold out · -18,320 sh-$42.3K
- GEODE CAPITAL MANAGEMENTTrimmed · -11,320 sh-$26.1K
SST 13F holders ranked 1–21 of 21
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | BANK OF AMERICA#1 · 161,513 sh | 161,513 | $373.1K | 0.00% | 0.0% |
| 2 | VANGUARD CAPITAL MANAGEMENT#2 · 127,576 sh | 127,576 | $294.7K | 0.00% | +243.6% |
| 3 | Cerity Partners#3 · 116,844 sh | 116,844 | $269.9K | <0.01% | 0.0% |
| 4 | Crescent Grove Advisors#4 · 75,545 sh | 75,545 | $174.5K | — | New |
| 5 | BlackRock#5 · 43,353 sh | 43,353 | $100.1K | 0.00% | +78.8% |
| 6 | MORGAN STANLEY#6 · 13,134 sh | 13,134 | $30.3K | 0.00% | New |
| 7 | GEODE CAPITAL MANAGEMENT#7 · 12,519 sh | 12,519 | $28.9K | 0.00% | -47.5% |
| 8 | Leonteq Securities AG#8 · 12,500 sh | 12,500 | $28.9K | <0.01% | New |
| 9 | PRICE T ROWE ASSOCIATES#9 · 11,731 sh | 11,731 | $28.0K | 0.00% | New |
| 10 | STATE STREET#10 · 11,502 sh | 11,502 | $26.6K | 0.00% | 0.0% |
| 11 | VANGUARD FIDUCIARY#11 · 9,141 sh | 9,141 | $21.1K | 0.00% | 0.0% |
| 12 | ROYAL BANK OF CANADA#12 · 1,314 sh | 1,314 | $3.0K | 0.00% | +3269.2% |
| 13 | UBS Group AG#13 · 618 sh | 618 | $1.4K | 0.00% | -53.3% |
| 14 | JONES FINANCIAL COMPANIES LLLP#14 · 366 sh | 366 | $919.00 | 0.00% | New |
| 15 | BNP PARIBAS FINANCIAL MARKETS#15 · 86 sh | 86 | $199.00 | 0.00% | 0.0% |
| 16 | SBI Securities , Ltd.#16 · 60 sh | 60 | $139.00 | — | 0.0% |
| 17 | JPMORGAN CHASE#17 · 42 sh | 42 | $102.00 | 0.00% | -99.3% |
| 18 | OSAIC#18 · 35 sh | 35 | $80.00 | 0.00% | 0.0% |
| 19 | GROUP ONE TRADING, L.P.#19 · 33 sh | 33 | $76.00 | 0.00% | -85.2% |
| 20 | BARCLAYS PLC#20 · 9 sh | 9 | $21.00 | 0.00% | New |
| 21 | SIGNATUREFD#21 · 1 sh | 1 | $2.00 | — | New |
Funds that sold out of SST in Q2 2026 (10)
Held SST at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| Cannae356,797 sh | 356,797 | $1.1M |
| MILLENNIUM MANAGEMENT32,619 sh | 32,619 | $98.5K |
| NINE MASTS CAPITAL Ltd18,548 sh | 18,548 | $56.0K |
| RENAISSANCE TECHNOLOGIES18,320 sh | 18,320 | $55.3K |
| Tower Research Capital (TRC)7,332 sh | 7,332 | $22.1K |
| Vanguard Global Advisers660 sh | 660 | $2.0K |
| Physician Wealth Advisors301 sh | 301 | $910.00 |
| Farther Finance Advisors150 sh | 150 | $783.00 |
| Strategic Wealth Partners, Ltd.100 sh | 100 | $302.00 |
| SHP Wealth Management100 sh | 100 | $302.00 |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.