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 March 31, 2026. The institutional investors covered on this page collectively reported approximately $58.29M 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 $8.72M in its March 31, 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 $17.51M, representing an estimated gain of +100.71% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 66% of the total disclosed FORR value among the investors covered in this analysis. Major shareholders include Portolan Capital Management, Llc, Blackrock, Inc., 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
93
Total Reported Value
$58.29M
Largest Holder
Portolan Capital Management, Llc
Largest Position
$8.72M
Insider Transactions (90d)
5
Latest Filing Quarter
Q2 2026
New Institutional Positions
128
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 | 0.46% | 1,541,276 | $8,723,622 | $17,508,895 | +$8,785,273 | +100.71% | |
| Blackrock, Inc. | 0.00% | 907,377 | $5,135,753 | $10,307,803 | +$5,172,050 | +100.71% | |
| First Manhattan Co. Llc. | 0.01% | 750,000 | $4,245,000 | $8,520,000 | +$4,275,000 | +100.71% | |
| Pacific Ridge Capital Partners, Llc | 0.87% | 710,847 | $4,023,394 | $8,075,222 | +$4,051,828 | +100.71% | |
| Nantahala Capital Management, Llc | 0.25% | 694,422 | $3,930,429 | $7,888,634 | +$3,958,205 | +100.71% | |
| Vanguard Capital Management Llc | 0.00% | 486,922 | $2,755,979 | $5,531,434 | +$2,775,455 | +100.71% | |
| Arrowmark Colorado Holdings Llc | 0.07% | 472,952 | $2,676,908 | $5,372,735 | +$2,695,827 | +100.71% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 436,706 | $2,471,756 | $4,960,980 | +$2,489,224 | +100.71% |
| Susquehanna International Group, Llp | 0.00% | 389,254 | $2,203,178 | $4,421,925 | +$2,218,747 | +100.71% | |
| Hotchkis & Wiley Capital Management Llc | 0.01% | 383,589 | $2,171,114 | $4,357,571 | +$2,186,457 | +100.71% | |
| Geode Capital Management, Llc | 0.00% | 316,788 | $1,793,205 | $3,598,712 | +$1,805,507 | +100.69% | |
| Sei Investments Co | 0.00% | 284,424 | $1,609,853 | $3,231,057 | +$1,621,204 | +100.71% | |
| Dimensional Fund Advisors Lp | 0.00% | 266,389 | $1,507,806 | $3,026,179 | +$1,518,373 | +100.70% | |
| State Street Corp | 0.00% | 259,070 | $1,466,336 | $2,943,035 | +$1,476,699 | +100.71% | |
| Quantinno Capital Management Lp | 0.00% | 224,085 | $1,268,321 | $2,545,606 | +$1,277,285 | +100.71% | |
| Aqr Capital Management Llc | 0.00% | 185,922 | $1,052,319 | $2,112,074 | +$1,059,755 | +100.71% | |
| Bridgeway Capital Management, Llc | 0.02% | 150,859 | $853,862 | $1,713,758 | +$859,896 | +100.71% | |
| Nierenberg Investment Management Company, Llc | 0.37% | 131,110 | $742,083 | $1,489,410 | +$747,327 | +100.71% | |
| Goldman Sachs Group Inc | 0.00% | 127,635 | $722,414 | $1,449,934 | +$727,520 | +100.71% | |
| Northern Trust Corp | 0.00% | 102,647 | $580,982 | $1,166,070 | +$585,088 | +100.71% | |
| Morgan Stanley | 0.00% | 102,073 | $577,738 | $1,159,549 | +$581,811 | +100.71% | |
| Two Sigma Investments, Lp | 0.00% | 101,601 | $575,062 | $1,154,187 | +$579,125 | +100.71% | |
| Vanguard Portfolio Management Llc | 0.00% | 98,172 | $555,654 | $1,115,234 | +$559,580 | +100.71% | |
| Kestrel Investment Management Corp | 0.31% | 91,500 | $517,890 | $1,039,440 | +$521,550 | +100.71% | |
| Charles Schwab Investment Management Inc | 0.00% | 88,939 | $503,395 | $1,010,347 | +$506,952 | +100.71% | |
| Jane Street Group, Llc | 0.00% | 86,342 | $488,695 | $980,845 | +$492,150 | +100.71% | |
| Vanguard Fiduciary Trust Co | 0.00% | 73,978 | $418,715 | $840,390 | +$421,675 | +100.71% | |
| Clear Street Group Inc. | 0.00% | 69,942 | $395,872 | $794,541 | +$398,669 | +100.71% | |
| Bank Of New York Mellon Corp | 0.00% | 68,756 | $389,159 | $781,068 | +$391,909 | +100.71% | |
| K2 Principal Fund, L.P. | 0.03% | 50,178 | $284,007 | $570,022 | +$286,015 | +100.71% | |
| Bank Of America Corp | 0.00% | 45,637 | $258,305 | $518,436 | +$260,131 | +100.71% | |
| Ameriprise Financial Inc | 0.00% | 43,337 | $245,288 | $492,308 | +$247,020 | +100.71% | |
| Hsbc Holdings Plc | 0.00% | 39,317 | $224,893 | $446,641 | +$221,748 | +98.60% | |
| Federated Hermes, Inc. | 0.00% | 37,753 | $213,682 | $428,874 | +$215,192 | +100.71% | |
| Barclays Plc | 0.00% | 35,241 | $199,464 | $400,338 | +$200,874 | +100.71% | |
| Squarepoint Ops Llc | 0.00% | 34,846 | $197,228 | $395,851 | +$198,623 | +100.71% | |
| Trexquant Investment Lp | 0.00% | 33,620 | $190,289 | $381,923 | +$191,634 | +100.71% | |
| Xtx Topco Ltd | 0.00% | 26,238 | $148,507 | $298,064 | +$149,557 | +100.71% | |
| D. E. Shaw & Co., Inc. | 0.00% | 25,811 | $146,090 | $293,213 | +$147,123 | +100.71% | |
| Alliancebernstein L.P. | 0.00% | 17,620 | $143,074 | $200,163 | +$57,089 | +39.90% | |
| Wealth Enhancement Advisory Services, Llc | 0.00% | 13,642 | $136,420 | $154,973 | +$18,553 | +13.60% | |
| Mercer Global Advisors Inc | 0.00% | 23,762 | $134,493 | $269,936 | +$135,443 | +100.71% | |
| Simplex Trading, Llc | 0.00% | 22,550 | $127,633 | $256,168 | +$128,535 | +100.71% | |
| Invesco Ltd. | 0.00% | 20,601 | $116,602 | $234,027 | +$117,425 | +100.71% | |
| Qube Research & Technologies Ltd | 0.00% | 20,116 | $113,857 | $228,518 | +$114,661 | +100.71% | |
| Nuveen, Llc | 0.00% | 18,647 | $105,542 | $211,830 | +$106,288 | +100.71% | |
| Inscription Capital, Llc | 0.01% | 17,170 | $97,182 | $195,051 | +$97,869 | +100.71% | |
| Ieq Capital, Llc | 0.00% | 16,338 | $92,473 | $185,600 | +$93,127 | +100.71% | |
| Rhumbline Advisers | 0.00% | 14,559 | $82,397 | $165,390 | +$82,993 | +100.72% | |
| Auxier Asset Management Llc | 0.01% | 13,076 | $74,010 | $148,543 | +$74,533 | +100.71% |
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.