# REPLIGEN CORP COM

REPLIGEN CORP COM is a security (CUSIP 759916109) tracked across SEC portfolio filings. 478 institutional managers reported $7.3B on Form 13F as of 2026-06-30; 75 registered fund positions totaling $869.7M via N-PORT as of 2026-05-31.

## Summary

- Issuer: REPLIGEN CORP
- Class: COM
- CUSIP: 759916109
- Asset category: EC
- 13F holders: 478
- 13F value: $7.3B
- 13F period: 2026-06-30
- N-PORT fund positions: 75
- N-PORT value: $869.7M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 478 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $818.3M | 4,993,945 |
| BlackRock, Inc. | New York, NY | $706.1M | 5,993,054 |
| FMR LLC | BOSTON, MA | $340.1M | 2,886,786 |
| [UNITED CAPITAL FINANCIAL ADVISERS, LLC](https://search.stillhousedata.com/firm/134600) | NEWPORT BEACH, CA | $326.8M | 2,773,980 |
| [MASSACHUSETTS FINANCIAL SERVICES CO /MA/](https://search.stillhousedata.com/firm/110045) | Boston, MA | $220.6M | 1,617,021 |
| [WASATCH ADVISORS LP](https://search.stillhousedata.com/firm/6081) | SALT LAKE CITY, UT | $217.0M | 1,590,251 |
| STATE STREET CORP | BOSTON, MA | $209.4M | 1,777,285 |
| Bank of New York Mellon Corp | NEW YORK, NY | $207.8M | 1,522,859 |
| [MAVERICK CAPITAL LTD](https://search.stillhousedata.com/firm/108262) | DALLAS, TX | $178.9M | 1,518,805 |
| [RTW INVESTMENTS, LP](https://search.stillhousedata.com/firm/153232) | NEW YORK, NY | $142.1M | 1,206,000 |
| FRANKLIN RESOURCES INC | San Mateo, CA | $140.6M | 1,193,139 |
| CONGRESS ASSET MANAGEMENT CO /MA | BOSTON, MA | $138.1M | 1,012,226 |
| [CITADEL ADVISORS LLC](https://search.stillhousedata.com/firm/148826) | MIAMI, FL | $136.8M | 1,099,181 |
| [ALLIANCEBERNSTEIN L.P.](https://search.stillhousedata.com/firm/108477) | NASHVILLE, TN | $136.3M | 831,792 |
| Conestoga Capital Advisors, LLC | WAYNE, PA | $133.8M | 980,983 |

## Top fund holders (N-PORT)

_Showing 15 of 75 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| State Street SPDR S&P MidCap 400SM ETF Trust | SPDR S&P MIDCAP 400 ETF TRUST | $188.0M | 77.61% |
| [T. Rowe Price New Horizons Fund, Inc.](https://search.stillhousedata.com/fund/S000002106) | T. ROWE PRICE NEW HORIZONS FUND, INC. | $141.7M | 110.96% |
| [T. Rowe Price All-Cap Opportunities Fund](https://search.stillhousedata.com/fund/S000002104) | T. Rowe Price All-Cap Opportunities Fund, Inc. | $88.2M | 61.43% |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $69.5M | 8.53% |
| [T. Rowe Price Small-Cap Stock Fund, Inc.](https://search.stillhousedata.com/fund/S000002120) | T. ROWE PRICE SMALL-CAP STOCK FUND, INC. | $62.0M | 76.81% |
| [VANGUARD EXPLORER FUND](https://search.stillhousedata.com/fund/S000002578) | VANGUARD EXPLORER FUND | $40.0M | 18.38% |
| [T. Rowe Price Institutional Small-Cap Stock Fund](https://search.stillhousedata.com/fund/S000002094) | T. Rowe Price Equity Funds, Inc. | $33.5M | 77.37% |
| [Fidelity Advisor Health Care Fund](https://search.stillhousedata.com/fund/S000005329) | Fidelity Advisor Series VII | $25.4M | 88.11% |
| [AB DISCOVERY GROWTH FUND, INC.](https://search.stillhousedata.com/fund/S000010117) | AB DISCOVERY GROWTH FUND, INC. | $21.3M | 79.07% |
| [Columbia Acorn Fund](https://search.stillhousedata.com/fund/S000009184) | COLUMBIA ACORN TRUST | $18.8M | 83.75% |
| [Nationwide Geneva Small Cap Growth Fund](https://search.stillhousedata.com/fund/S000041104) | Nationwide Mutual Funds | $18.3M | 166.18% |
| [Fidelity Advisor Stock Selector Mid Cap Fund](https://search.stillhousedata.com/fund/S000005114) | Fidelity Advisor Series I | $14.3M | 56.07% |
| [CONESTOGA SMID CAP FUND](https://search.stillhousedata.com/fund/S000043859) | Conestoga Funds | $13.6M | 274.03% |
| [T. Rowe Price Health Sciences Fund, Inc.](https://search.stillhousedata.com/fund/S000002088) | T. ROWE PRICE HEALTH SCIENCES FUND, INC. | $12.8M | 11.76% |
| [Baird Small/Mid Cap Growth Fund](https://search.stillhousedata.com/fund/S000063403) | Baird Funds Inc | $11.1M | 1441.85% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/759916109.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

---

Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.