FORRESTER RESEARCH INC (FORR) Institutional Shareholders
FORRESTER RESEARCH INC (FORR) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $84.15M in FORR holdings during the latest filing period.
Portolan Capital Management, Llc is currently the largest disclosed institutional shareholder of FORR tracked by InsiderSet, reporting ownership valued at approximately $13.66M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $18.27M, representing an estimated gain of +33.77% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 62% of the total disclosed FORR value among the investors covered in this analysis. Major shareholders include Portolan Capital Management, Llc, Nantahala Capital Management, Llc, First Manhattan Co. Llc., and several other long-term asset managers with concentrated positions in FORRESTER RESEARCH INC (FORR).
This page ranks the largest institutional FORR shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
96
Total Reported Value
$84.15M
Largest Holder
Portolan Capital Management, Llc
Largest Position
$13.66M
Insider Transactions (90d)
13
Latest Filing Quarter
Q2 2026
New Institutional Positions
137
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Portolan Capital Management, Llc | 0.51% | 1,623,925 | $13,657,209 | $18,269,156 | +$4,611,947 | +33.77% | |
| Nantahala Capital Management, Llc | 0.39% | 763,446 | $6,420,581 | $8,588,768 | +$2,168,187 | +33.77% | |
| First Manhattan Co. Llc. | 0.02% | 750,000 | $6,307,500 | $8,437,500 | +$2,130,000 | +33.77% | |
| Pacific Ridge Capital Partners, Llc | 1.08% | 705,344 | $5,931,943 | $7,935,120 | +$2,003,177 | +33.77% | |
| Vanguard Capital Management Llc | 0.00% | 500,395 | $4,208,322 | $5,629,444 | +$1,421,122 | +33.77% | |
| Acadian Asset Management Llc | 0.00% | 429,610 | $3,609,000 | $4,833,113 | +$1,224,113 | +33.92% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 418,206 | $3,517,112 | $4,704,818 | +$1,187,706 | +33.77% |
| Hotchkis & Wiley Capital Management Llc | 0.01% | 366,689 | $3,083,854 | $4,125,251 | +$1,041,397 | +33.77% | |
| Aqr Capital Management Llc | 0.00% | 357,665 | $3,007,962 | $4,023,731 | +$1,015,769 | +33.77% | |
| Quantinno Capital Management Lp | 0.00% | 289,195 | $2,432,130 | $3,253,444 | +$821,314 | +33.77% | |
| Blackrock, Inc. | 0.00% | 270,105 | $2,271,582 | $3,038,681 | +$767,099 | +33.77% | |
| Ancora Advisors Llc | 0.04% | 269,891 | $2,269,783 | $3,036,274 | +$766,491 | +33.77% | |
| Arrowmark Colorado Holdings Llc | 0.08% | 231,808 | $1,949,505 | $2,607,840 | +$658,335 | +33.77% | |
| Dimensional Fund Advisors Lp | 0.00% | 211,963 | $1,782,632 | $2,384,584 | +$601,952 | +33.77% | |
| Sei Investments Co | 0.00% | 200,406 | $1,685,429 | $2,254,568 | +$569,139 | +33.77% | |
| Russell Investments Group, Ltd. | 0.00% | 199,012 | $1,673,697 | $2,238,885 | +$565,188 | +33.77% | |
| Geode Capital Management, Llc | 0.00% | 169,088 | $1,422,325 | $1,902,240 | +$479,915 | +33.74% | |
| Jane Street Group, Llc | 0.00% | 168,333 | $1,415,680 | $1,893,746 | +$478,066 | +33.77% | |
| Morgan Stanley | 0.00% | 163,788 | $1,377,466 | $1,842,615 | +$465,149 | +33.77% | |
| Two Sigma Investments, Lp | 0.00% | 132,202 | $1,111,819 | $1,487,273 | +$375,454 | +33.77% | |
| Nierenberg Investment Management Company, Llc | 0.55% | 131,110 | $1,102,635 | $1,474,988 | +$372,353 | +33.77% | |
| Bridgeway Capital Management, Llc | 0.02% | 123,617 | $1,039,619 | $1,390,691 | +$351,072 | +33.77% | |
| Kestrel Investment Management Corp | 0.42% | 91,500 | $769,515 | $1,029,375 | +$259,860 | +33.77% | |
| Trexquant Investment Lp | 0.00% | 76,916 | $646,864 | $865,305 | +$218,441 | +33.77% | |
| Susquehanna International Group, Llp | 0.00% | 74,551 | $626,974 | $838,699 | +$211,725 | +33.77% | |
| Vanguard Fiduciary Trust Co | 0.00% | 70,016 | $588,835 | $787,680 | +$198,845 | +33.77% | |
| Qube Research & Technologies Ltd | 0.00% | 68,992 | $580,223 | $776,160 | +$195,937 | +33.77% | |
| Goldman Sachs Group Inc | 0.00% | 66,865 | $562,335 | $752,231 | +$189,896 | +33.77% | |
| Marshall Wace, Llp | 0.00% | 65,977 | $554,867 | $742,241 | +$187,374 | +33.77% | |
| State Street Corp | 0.00% | 65,213 | $548,441 | $733,646 | +$185,205 | +33.77% | |
| Charles Schwab Investment Management Inc | 0.00% | 64,854 | $545,422 | $729,608 | +$184,186 | +33.77% | |
| Gsa Capital Partners Llp | 0.03% | 64,275 | $541,000 | $723,094 | +$182,094 | +33.66% | |
| Price T Rowe Associates Inc | 0.00% | 54,743 | $461,000 | $615,859 | +$154,859 | +33.59% | |
| Federated Hermes, Inc. | 0.00% | 52,118 | $438,312 | $586,328 | +$148,016 | +33.77% | |
| Cooper Creek Partners Management Llc | 0.02% | 46,779 | $393,000 | $526,264 | +$133,264 | +33.91% | |
| Millennium Management Llc | 0.00% | 43,759 | $368,013 | $492,289 | +$124,276 | +33.77% | |
| Ameriprise Financial Inc | 0.00% | 40,105 | $337,283 | $451,181 | +$113,898 | +33.77% | |
| Mercer Global Advisors Inc | 0.00% | 38,578 | $324,441 | $434,003 | +$109,562 | +33.77% | |
| Hsbc Holdings Plc | 0.00% | 38,425 | $322,002 | $432,281 | +$110,279 | +34.25% | |
| Bank Of America Corp | 0.00% | 35,203 | $296,057 | $396,034 | +$99,977 | +33.77% | |
| Barclays Plc | 0.00% | 33,648 | $282,979 | $378,540 | +$95,561 | +33.77% | |
| Vanguard Portfolio Management Llc | 0.00% | 32,792 | $275,781 | $368,910 | +$93,129 | +33.77% | |
| Northern Trust Corp | 0.00% | 28,997 | $243,865 | $326,216 | +$82,351 | +33.77% | |
| Bank Of New York Mellon Corp | 0.00% | 27,636 | $232,419 | $310,905 | +$78,486 | +33.77% | |
| Ieq Capital, Llc | 0.00% | 27,040 | $227,406 | $304,200 | +$76,794 | +33.77% | |
| Vanguard Personalized Indexing Management, Llc | 0.00% | 26,893 | $226,170 | $302,546 | +$76,376 | +33.77% | |
| Aster Capital Management (Difc) Ltd | 0.05% | 25,610 | $215,380 | $288,113 | +$72,733 | +33.77% | |
| Xtx Topco Ltd | 0.00% | 23,659 | $198,972 | $266,164 | +$67,192 | +33.77% | |
| D. E. Shaw & Co., Inc. | 0.00% | 21,389 | $179,881 | $240,626 | +$60,745 | +33.77% | |
| Inscription Capital, Llc | 0.01% | 19,856 | $166,989 | $223,380 | +$56,391 | +33.77% |
Frequently asked questions about FORR
Who owns the most FORR stock?
The largest holders of FORR are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for FORRESTER RESEARCH INC (FORR).
Is FORR widely held by superinvestors?
Many widely followed stocks like FORR appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly FORR is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.