CUSIP: 85256A109 | NYSE | Communication Services · Advertising Agencies | Small Cap | 397 institutional holders
5%+ stakes reported outside the quarterly cycle. A 13D is due within five business days of the event below, so these figures lead the holders table until the filer's next 13F catches up to them.
| Holder | Shares | % of Class | Change | Event Date | vs 13F |
|---|---|---|---|---|---|
| 13D/APenn Mark Jeffery with Stagwell Group LLC, Stagwell Agency Holdings LLC, Stagwell Media LP | 29,368,697 | 11.6% | New 5%+ stake | Dec 15, 2025 | No 13F filer matched |
| Style | Turnover | Location | Filed | ||||
|---|---|---|---|---|---|---|---|
| 7,235,872 | $58.9M | 0.0% | Index | Low | Austin, TX | 2026-11-04 | |
| 1,987,023 | $16.2M | 1.2% | Value | High | Philadelphia, PA | 2026-11-04 | |
| 1,719,653 | $15.7M | 0.2% | Growth | Medium | Sandy, UT | 2026-10-20 | |
| 1,719,653 | $15.7M | 0.2% | Growth | Low | Sandy, UT | 2026-10-20 | |
| 1,556,607 | $12.7M | 2.0% | ETF | Low | Scottsdale, AZ | 2026-10-14 | |
| 521,785 | $4.2M | 0.0% | Core | Low | New York, NY | 2026-11-05 | |
| 425,121 | $3.5K | 0.0% | Value | High | Chicago, IL | 2026-10-22 | |
| 379,663 | $3.1M | 0.0% | GARP | Very High | Chicago, IL | 2026-11-05 | |
| 306,213 | $2.5M | 1.2% | Core | Medium | Ramsey, NJ | 2026-10-27 | |
| 183,916 | $1.5M | 0.0% | Core | Medium | New York, NY | 2026-11-04 | |
| 179,511 | $1.5M | 0.2% | Core | Low | New York, NY | 2026-10-13 | |
| 175,699 | $1.4K | 0.0% | Value | Very High | Castle Rock, CO | 2026-11-04 | |
| 126,831 | $1.0M | 0.0% | Core | Very High | Chicago, IL | 2026-11-04 | |
| 114,811 | $934.6K | 0.2% | ETF | Very Low | San Francisco, CA | 2026-10-15 | |
| 101,830 | $828.9K | 0.0% | Deep Value | Very High | Chicago, IL | 2026-11-02 | |
| 83,911 | $683.0K | 0.1% | Deep Value | Very High | San Diego, CA | 2026-10-16 | |
| 74,344 | $605.2K | 0.0% | Growth | Low | Austin, TX | 2026-10-30 | |
| 41,600 | $338.6K | 0.0% | Growth | Medium | Foster City, CA | 2026-10-13 | |
| 41,550 | $338.2K | 0.0% | GARP | Medium | Charlotte, NC | 2026-10-22 | |
| 37,800 | $307.7K | 0.0% | Core | Medium | Columbus, OH | 2026-10-30 | |
| 35,338 | $287.7K | 0.0% | Core | High | Seattle, WA | 2026-11-04 | |
| 35,220 | $298.0K | 0.1% | GARP | Medium | Sandy, UT | 2026-10-20 | |
| 34,753 | $282 | 0.0% | Core | Very Low | Juneau, AK | 2026-10-15 | |
| 29,558 | $240.6K | 0.0% | Index | Very Low | Overland Park, KS | 2026-11-02 | |
| 26,751 | $217.8K | 0.0% | Core | Low | Zurich, Switzerland | 2026-11-03 | |
| 26,109 | $212.5K | 0.0% | Growth | Low | Bethesda, MD | 2026-10-29 | |
| 24,446 | $199.0K | 0.0% | Index | Very Low | Phoenix, AZ | 2026-11-03 | |
| 20,878 | $182.9K | 0.0% | Core | Low | Plymouth, MN | 2026-10-13 | |
| 20,291 | $165.2K | 0.0% | Growth | Medium | Tampa, FL | 2026-10-16 | |
| 20,204 | $164.5K | 0.0% | ETF | Low | Waltham, MA | 2026-10-16 | |
| 17,294 | $140.8K | 0.0% | Agg Growth | Very High | Chicago, IL | 2026-11-05 | |
| 16,197 | $131.8K | 0.0% | Growth | Medium | Carouge, Switzerland | 2026-11-03 | |
| 15,654 | $127.4K | 0.0% | Growth | Low | Naperville, IL | 2026-11-03 | |
| 14,597 | $118.8K | 0.0% | Growth | Medium | New York, NY | 2026-11-05 | |
| 12,075 | $98.3K | 0.0% | Core | Medium | New York, NY | 2026-10-27 | |
| 11,305 | $92.0K | 0.0% | Core | Very Low | Saint Louis, MO | 2026-10-27 | |
| 10,700 | $87.1K | 0.0% | Core | Medium | Richmond, VA | 2026-10-28 | |
| 10,166 | $82.8K | 0.0% | Core | Medium | Charlotte, NC | 2026-10-15 | |
| 3,046 | $24.8K | 0.0% | Growth | Very High | Hong Kong, South Korea | 2026-10-29 | |
| 2,573 | $20.9K | 0.0% | Index | Very Low | St. Louis, MO | 2026-10-20 | |
| 2,536 | $20.6K | 0.0% | ETF | N/A | Rapid City, SD | 2026-11-02 | |
| 1,908 | $15.5K | 0.0% | Index | Low | San Francisco, CA | 2026-10-08 | |
| 1,000 | $8.1K | 0.0% | ETF | Low | Owings Mills, MD | 2026-10-26 | |
| 974 | $7.9K | 0.0% | Core | Very High | New York, NY | 2026-11-05 | |
| 893 | $7.3K | 0.0% | ETF | Very Low | Sylvania, OH | 2026-10-26 | |
| 740 | $6.0K | 0.0% | Growth | Low | Tampa, FL | 2026-10-16 | |
| 644 | $5.2K | 0.0% | Core | Medium | Birmingham, AL | 2026-11-04 | |
| 541 | $4.4K | 0.0% | Value | Medium | Rancho Santa Fe, CA | 2026-10-14 | |
| 372 | $3.0K | 0.0% | Index | Low | San Francisco, CA | 2026-11-03 | |
| 168 | $1.4K | 0.0% | Index | Very Low | Foster City, CA | 2026-10-08 | |
| 141 | $1.1K | 0.0% | ETF | Medium | Encinitas, CA | 2026-10-21 | |
| 140 | $1.1K | 0.0% | Growth | Low | St Louis, MO | 2026-11-05 | |
| 134 | $1.1K | 0.0% | ETF | Medium | Akron, OH | 2026-10-13 | |
| 120 | $977 | 0.0% | ETF | Low | Fort Lauderdale, FL | 2026-10-30 | |
| 105 | $855 | 0.0% | ETF | Very Low | O'Fallon, IL | 2026-10-19 | |
| 100 | $814 | 0.0% | Agg Growth | Low | Dallas, TX | 2026-11-03 | |
| 85 | $692 | 0.0% | ETF | Very Low | Naperville, IL | 2026-10-23 | |
| 58 | $0 | 0.0% | Value | High | London, United Kingdom | 2026-10-30 | |
| 51 | $415 | 0.0% | GARP | Low | Phoenix, AZ | 2026-10-02 | |
| 44 | $358 | 0.0% | Agg Growth | Low | Tokyo, Mexico | 2026-10-22 | |
| 4 | $33 | 0.0% | ETF | Low | Beaver, PA | 2026-10-16 | |
| 1 | $9 | 0.0% | ETF | Very Low | Hermitage, PA | 2026-11-03 |