PEPG · PepGen Inc.

$3.11 -0.07 (-2.20%) At close · Sep 4

Market Cap

$215.40M

69.26M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP →

Quarter:

Holders: 72

Total Value: $93,774,693

Total Shares: 52,097,938

Institutional Ownership Trend

17 quarters

Superinvestors Holding PEPG

All superinvestors →

Andreas Halvorsen $6,268,381

Holder Concentration

Across 72 13F filers · Δ vs Mar 31, 2026

Top Holder

38.5%

+3.1 pts

Top 5

64.0%

+5.7 pts

Top 10

81.1%

+7.3 pts

HHI

1,731

Moderately concentrated+262

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: -23

Institutional value: -6.6%

Shares held: -8.1%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Large RENAISSANCE TECHNOLOGIES LLC	+1,463,446	1,520,246
Mid ADAR1 Capital Management, LLC	+983,447	2,591,085
Mid GSA CAPITAL PARTNERS LLP	+814,566	852,852
Large MARSHALL WACE, LLP	+568,424	866,992
Large Squarepoint Ops LLC	+382,487	529,083

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mid AWM Investment Company, Inc.	−1,230,925	600,000
Mega MORGAN STANLEY	−950,145	48,842
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP	−791,252	96,216
Mega Qube Research & Technologies Ltd	−607,891	98,581
Small Ikarian Capital, LLC	−300,000	447,165

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Small Rosalind Advisors, Inc.	350,000	$630,000
Small Bronte Capital Management Pty Ltd.	17,776	$31,996
Large Vanguard Personalized Indexing Management, LLC	17,629	$31,732
Small Aigen Investment Management, LP	12,877	$23,178
Small Rialto Wealth Management, LLC	318	$572

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Large Woodline Partners LP	1,311,021	$2,320,507
Mega Pictet Asset Management Holding SA	1,306,783	$2,313,005
Small Kalehua Capital Management LLC	729,961	$1,292,030
Mid Nantahala Capital Management, LLC	681,158	$1,205,649
Small LUMINUS MANAGEMENT LLC	150,000	$265,500

Filter: New 7 Increased 20 Reduced 27 Sold out 30 Unchanged 18

Showing 75 of 75

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

RA CAPITAL MANAGEMENT, L.P.

$36,116,181

38.51%

20,064,545

Commodore Capital LP

$8,055,000

8.59%

4,475,000

VIKING GLOBAL INVESTORS LP

$6,268,381

6.68%

3,482,434

Laurion Capital Management LP

$4,951,539

5.28%

2,750,855

ADAR1 Capital Management, LLC

$4,663,953

4.97%

2,591,085

Vivo Capital, LLC

$4,185,000

4.46%

2,325,000

VANGUARD CAPITAL MANAGEMENT LLC

$3,484,656

3.72%

1,935,920

MILLENNIUM MANAGEMENT LLC

$3,216,177

3.43%

1,786,765

RENAISSANCE TECHNOLOGIES LLC

$2,736,442

2.92%

1,520,246

BlackRock, Inc.

$2,347,669

2.50%

1,304,262

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BlackRock Investment Management, LLC	10,314	$18,565	0.8%	Sole
BlackRock Fund Advisors	597,341	$1,075,213	45.8%	Sole
BlackRock Institutional Trust Company, N.A.	638,816	$1,149,868	49.0%	Sole
BlackRock Asset Management Ireland Ltd	57,677	$103,818	4.4%	Sole
Aperio Group, LLC	114	$205	0.0%	Sole

MARSHALL WACE, LLP

$1,560,585

1.66%

866,992

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Marshall Wace North America L.P. joint	866,992	$1,560,585	100.0%	Other

GSA CAPITAL PARTNERS LLP

$1,535,133

1.64%

852,852

CITADEL ADVISORS LLC

$1,185,085

1.26%

658,381

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	657,107	$1,182,792	99.8%	Defined
Held directly	1,274	$2,293	0.2%	Defined

AWM Investment Company, Inc.

$1,080,000

1.15%

600,000

MONIMUS CAPITAL MANAGEMENT, LP

$1,057,838

1.13%

587,688

Squarepoint Ops LLC

$952,349

1.02%

529,083

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	529,083	$952,349	100.0%	Defined

GEODE CAPITAL MANAGEMENT, LLC

$942,251

1.00%

523,473

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	98,989	$178,180	18.9%	Defined
Held directly	424,484	$764,071	81.1%	Defined

Creek Drive Management Group LLC

$810,000

0.86%

450,000

Ikarian Capital, LLC

$804,897

0.86%

447,165

DIADEMA PARTNERS LP

$671,911

0.72%

373,284

BOOTHBAY FUND MANAGEMENT, LLC

$659,053

0.70%

366,141

Rosalind Advisors, Inc.

$630,000

0.67%

350,000

Driehaus Capital Management LLC

$503,836

0.54%

279,909

Boxer Capital Management, LLC

$491,205

0.52%

272,892

VANGUARD FIDUCIARY TRUST CO

$470,656

0.50%

261,476

XTX Topco Ltd

$441,624

0.47%

245,347

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	245,347	$441,624	100.0%	Defined

STATE STREET CORP

$412,902

0.44%

229,390

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS TRUST COMPANY	229,390	$412,902	100.0%	Defined

Artia Global Partners LP

$369,583

0.39%

205,324

JANE STREET GROUP, LLC

$310,341

0.33%

172,412

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	162,717	$292,890	94.4%	Defined
Jane Street Global Trading, LLC	9,695	$17,451	5.6%	Defined

GOLDMAN SACHS GROUP INC

$302,598

0.32%

168,110

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	168,110	$302,598	100.0%	Defined

Connor, Clark & Lunn Investment Management Ltd.

$201,727

0.22%

112,071

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Manager 1	112,071	$201,727	100.0%	Sole

UBS Group AG

$199,211

0.21%

110,673

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	59,073	$106,331	53.4%	Defined
UBS Europe SE	51,600	$92,880	46.6%	Defined

NORTHERN TRUST CORP

$177,728

0.19%

98,738

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	98,738	$177,728	100.0%	Defined

Qube Research & Technologies Ltd

$177,445

0.19%

98,581

RBF Capital, LLC

$171,075

0.18%

95,042

Persistent Asset Partners Ltd

$171,005

0.18%

95,003

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$168,660

0.18%

93,700

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$135,748

0.14%

75,416

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	62,099	$111,778	82.3%	Other
G1 EXECUTION SERVICES, LLC	13,317	$23,970	17.7%	Other

Rangeley Capital, LLC

$126,000

0.13%

70,000

Verdad Advisers, LP

$120,384

0.13%

66,880

TWO SIGMA INVESTMENTS, LP

$119,282

0.13%

66,268

DIMENSIONAL FUND ADVISORS LP

$97,402

0.10%

54,113

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Fund Advisors Ltd.	4,196	$7,552	7.8%	Defined
Dimensional Ireland Ltd	20,179	$36,322	37.3%	Defined
Held directly	29,738	$53,528	55.0%	Sole

MORGAN STANLEY

$87,914

0.09%

48,842

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO. LLC	12	$21	0.0%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	48,657	$87,582	99.6%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	173	$311	0.4%	Defined

AMERICAN CENTURY COMPANIES INC

$76,681

0.08%

42,601

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
AMERICAN CENTURY INVESTMENT MANAGEMENT INC	42,601	$76,681	100.0%	Defined

Quadrature Capital Ltd

$73,684

0.08%

40,936

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Quadrature US Inc.	40,936	$73,684	100.0%	Other

Point72 Asset Management, L.P.

$71,496

0.08%

39,720

Rathbones Group PLC

$57,605

0.06%

32,003

READYSTATE ASSET MANAGEMENT LP

$51,082

0.05%

28,379

Bronte Capital Management Pty Ltd.

$31,996

0.03%

17,776

Vanguard Global Advisers, LLC

$31,901

0.03%

17,723

Vanguard Personalized Indexing Management, LLC

$31,732

0.03%

17,629

CITADEL ADVISORS LLC

$23,580

0.03%

13,100

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	13,100	$23,580	100.0%	Defined

Aigen Investment Management, LP

$23,178

0.02%

12,877

China Universal Asset Management Co., Ltd.

$19,814

0.02%

11,008

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$19,080

0.02%

10,600

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	10,600	$19,080	100.0%	Other

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$18,360

0.02%

10,200

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	10,200	$18,360	100.0%	Other

GROUP ONE TRADING LLC

$17,537

0.02%

9,743

Tower Research Capital LLC (TRC)

$10,002

0.01%

5,557

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	5,557	$10,002	100.0%	Defined

JPMORGAN CHASE & CO

$9,100

0.01%

5,056

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JPMorgan Chase Bank, N.A.	171	$307	3.4%	Defined
J.P. Morgan Securities plc	4,885	$8,793	96.6%	Defined

Zurcher Kantonalbank (Zurich Cantonalbank)

$8,071

0.01%

4,484

BARCLAYS PLC

$7,899

0.01%

4,389

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	4,301	$7,741	98.0%	Defined
BARCLAYS CAPITAL INC.	88	$158	2.0%	Defined

Mirae Asset Global Investments Co., Ltd.

$5,569

0.01%

3,094

BNP PARIBAS ARBITRAGE, SA

$4,854

0.01%

2,697

FMR LLC

$2,995

0.00%

1,664

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	1,664	$2,995	100.0%	Defined

CITIGROUP INC

$2,928

0.00%

1,627

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	1,627	$2,928	100.0%	Defined

GF FUND MANAGEMENT CO. LTD.

$2,568

0.00%

1,427

Bare Financial Services, Inc

$588

0.00%

327

JONES FINANCIAL COMPANIES LLLP

$586

0.00%

326

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	326	$586	100.0%	Sole

Rialto Wealth Management, LLC

$572

0.00%

318

NISA INVESTMENT ADVISORS, LLC

$351

0.00%

195

Cornerstone Financial Management LLC

$217

0.00%

121

ROYAL BANK OF CANADA

$109

0.00%

Integrated Wealth Concepts LLC

$108

0.00%

Caitong International Asset Management Co., Ltd

$23

0.00%

ACADIAN ASSET MANAGEMENT LLC

0.00%

869

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	869	$1	100.0%	Defined

Key facts CIK 1835597 CUSIP 713317105 13F (30d) 59 filings 59 filers Visit website Investor relations