Forrester Research, Inc. (FORR) ownership: Portolan Capital Management, LLC 46% · institutions 60% · index and ETF funds 4% (13F 2026-03-31). Insider activity, 90 days: 3 sales, 0 open-market buys. SEC EDGAR first-party data.
| Holder | Shares | Market Value | % Outstanding | Reported |
|---|---|---|---|---|
| Portolan Capital Management, LLC | 1541276.00 | $8.72M | 8.1% | 2026-03-31 |
| BlackRock | 907377.00 | $5.14M | 4.8% | 2026-03-31 |
| First Manhattan Co. LLC. | 750000.00 | $4.25M | 3.9% | 2026-03-31 |
| Pacific Ridge Capital Partners, LLC | 710847.00 | $4.02M | 3.7% | 2026-03-31 |
| Nantahala Capital Management, LLC | 694422.00 | $3.93M | 3.6% | 2026-03-31 |
| Vanguard | 663121.00 | $3.75M | 3.5% | 2026-03-31 |
| Tieton Capital Management, LLC | 559041.00 | $3.16M | 2.9% | 2026-03-31 |
| ArrowMark Colorado Holdings LLC | 472952.00 | $2.68M | 2.5% | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-08-20 | |
| Sell | null | 2026-08-20 | |
| Sell | null | 2026-08-13 | |
| Sell | null | 2026-08-01 | |
| Sell | null | 2026-08-01 | |
| Sell | null | 2026-08-01 | |
| Sell | null | 2026-08-01 | |
| Sell | null | 2026-08-01 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.