SEG · Seaport Entertainment Group Inc. · Holdings

$25.44 -0.41 (-1.59%) At close · Sep 11

Russell 2000 member Rebalance outlook locked

Market Cap

$325.87M

12.81M

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: 117

Total Value: $296,737,058

Total Shares: 11,155,531

Showing 1–100 of 118 holdings by value · page 1 of 2

Institutional Ownership Trend

8 quarters

Superinvestors Holding SEG

All superinvestors →

Bill Ackman $107,910,794

Holder Concentration

Across 117 13F filers · Δ vs Mar 31, 2026

Top Holder

45.0%

−1.7 pts

Top 5

69.8%

−1.7 pts

Top 10

84.6%

−1.0 pts

HHI

2,247

Moderately concentrated−155

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: -2

Institutional value: +28.6%

Shares held: +3.9%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mega VANGUARD PORTFOLIO MANAGEMENT LLC	+341,138	384,200
Mega BlackRock, Inc.	+47,491	553,120
Small GATE CITY CAPITAL MANAGEMENT, LLC	+33,801	723,248
Mega AQR CAPITAL MANAGEMENT LLC	+27,904	51,134
Small KAHN BROTHERS GROUP INC	+23,778	917,005

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mega DIMENSIONAL FUND ADVISORS LP	−58,581	396,566
Large RENAISSANCE TECHNOLOGIES LLC	−54,301	27,999
Large LAZARD ASSET MANAGEMENT LLC	−32,844	14,624
Small Solas Capital Management, LLC	−10,026	212,892
Mid HORIZON KINETICS ASSET MANAGEMENT LLC	−9,937	42,503

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Large PERSHING SQUARE INC.	5,023,780	$133,632,548
Micro Marquette Asset Management, LLC	14,749	$392,323
Large GABELLI FUNDS LLC	9,182	$244,241
Mega Invesco Ltd.	9,133	$242,936
Mega BANK OF AMERICA CORP /DE/	8,933	$237,617

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Large Pershing Square Capital Management, L.P.	5,023,780	$107,910,794
Mega CITADEL ADVISORS LLC	36,400	$781,871
Small Marnell Management LLC	32,300	$693,804
Mid ArrowMark Colorado Holdings LLC	18,406	$395,360
Small Odyssean, LLC	9,723	$208,850

Filter: New 14 Increased 39 Reduced 24 Sold out 16 Unchanged 40

Showing 100 of 118

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

PERSHING SQUARE INC.

$133,632,548

45.03%

5,023,780

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

Manager	Shares	Value (USD)	% of position	Discretion
Pershing Square Capital Management, L.P. joint	5,023,780	$133,632,548	100.0%	Defined

KAHN BROTHERS GROUP INC

$24,392,333

8.22%

917,005

GATE CITY CAPITAL MANAGEMENT, LLC

$19,238,396

6.48%

723,248

Rubric Capital Management LP

$15,122,898

5.10%

568,530

BlackRock, Inc.

$14,712,988

4.96%

553,120

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

Manager	Shares	Value (USD)	% of position	Discretion
BLACKROCK FINANCIAL MANAGEMENT INC/DE	2,548	$67,776	0.5%	Sole
BlackRock Asset Management Canada Ltd	65	$1,729	0.0%	Sole
BlackRock Investment Management, LLC	21,478	$571,314	3.9%	Sole
BLACKROCK ADVISORS LLC	15,141	$402,750	2.7%	Sole
BlackRock Fund Advisors	298,731	$7,946,244	54.0%	Sole
BlackRock Institutional Trust Company, N.A.	213,528	$5,679,844	38.6%	Sole
Aperio Group, LLC	1,629	$43,331	0.3%	Sole

DIMENSIONAL FUND ADVISORS LP

$10,548,654

3.55%

396,566

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.	343	$9,123	0.1%	Defined
DFA Australia Ltd.	1,790	$47,614	0.5%	Defined
Dimensional Ireland Ltd	10,353	$275,389	2.6%	Defined
Held directly	384,080	$10,216,528	96.9%	Sole

VANGUARD PORTFOLIO MANAGEMENT LLC

$10,219,720

3.44%

384,200

VANGUARD CAPITAL MANAGEMENT LLC

$9,138,403

3.08%

343,549

Cerity Partners LLC

$8,377,802

2.82%

314,955

Solas Capital Management, LLC

$5,662,927

1.91%

212,892

GEODE CAPITAL MANAGEMENT, LLC

$5,536,417

1.87%

208,136

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	28,782	$765,601	13.8%	Defined
Held directly	179,354	$4,770,816	86.2%	Defined

STATE STREET CORP

$4,943,290

1.67%

185,838

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 EUROPE LIMITED joint	185,838	$4,943,290	100.0%	Defined

Rangeley Capital, LLC

$4,083,552

1.38%

153,517

GOLDMAN SACHS GROUP INC

$3,121,349

1.05%

117,344

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	100,391	$2,670,400	85.6%	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	16,953	$450,949	14.4%	Defined

Peapod Lane Capital LLC

$2,922,036

0.98%

109,851

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

$1,691,414

0.57%

63,587

NORTHERN TRUST CORP

$1,608,262

0.54%

60,461

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	59,261	$1,576,342	98.0%	Defined
DWS INVESTMENT MANAGEMENT AMERICAS, INC joint	1,200	$31,920	2.0%	Other

LPL Financial LLC

$1,375,512

0.46%

51,711

AQR CAPITAL MANAGEMENT LLC

$1,360,160

0.46%

51,134

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

Manager	Shares	Value (USD)	% of position	Discretion
RF&L WEALTH MANAGEMENT, LLC	6	$159	0.0%	Other
Prism Planning Partners LLC	11	$292	0.0%	Other
Compound Planning, Inc.	8	$212	0.0%	Other
Arax Advisory Partners	1,233	$32,797	2.4%	Other
HALBERT HARGROVE GLOBAL ADVISORS, LLC	328	$8,724	0.6%	Other
Stokes Family Office, LLC	54	$1,436	0.1%	Other
Held directly	49,494	$1,316,540	96.8%	Defined

VANGUARD FIDUCIARY TRUST CO

$1,353,408

0.46%

50,880

O'Keefe Stevens Advisory, Inc.

$1,305,661

0.44%

49,085

HORIZON KINETICS ASSET MANAGEMENT LLC

$1,130,579

0.38%

42,503

Trexquant Investment LP

$908,948

0.31%

34,171

PRICE T ROWE ASSOCIATES INC /MD/

$842,235

0.28%

31,663

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

Manager	Shares	Value (USD)	% of position	Discretion
T. Rowe Price International Ltd	31,663	$842,235	100.0%	Defined

Gem Investment Advisors, LLC

$745,119

0.25%

28,012

RENAISSANCE TECHNOLOGIES LLC

$744,773

0.25%

27,999

Quantinno Capital Management LP

$735,303

0.25%

27,643

MORGAN STANLEY

$718,917

0.24%

27,027

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

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO INTERNATIONAL PLC	21	$558	0.1%	Defined
MORGAN STANLEY & CO. LLC	2,085	$55,461	7.7%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	11,577	$307,948	42.8%	Defined
MORGAN STANLEY SMITH BARNEY LLC	4,420	$117,572	16.4%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	8,924	$237,378	33.0%	Defined

Bank of New York Mellon Corp

$601,266

0.20%

22,604

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

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Investments Corporation	7,552	$200,883	33.4%	Defined
The Bank of New York Mellon	14,425	$383,705	63.8%	Defined
BNY Mellon, NA joint	625	$16,625	2.8%	Defined
Held directly	2	$53	0.0%	Defined

INGALLS & SNYDER LLC

$587,913

0.20%

22,102

UBS Group AG

$587,301

0.20%

22,079

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

Manager	Shares	Value (USD)	% of position	Discretion
UBS Financial Services Inc	924	$24,578	4.2%	Defined
UBS AG	21,155	$562,723	95.8%	Defined

XTX Topco Ltd

$540,299

0.18%

20,312

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	20,312	$540,299	100.0%	Defined

PRINCIPAL FINANCIAL GROUP INC

$484,810

0.16%

18,226

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

Manager	Shares	Value (USD)	% of position	Discretion
Manager 134	1	$26	0.0%	Defined
Held directly	18,225	$484,784	100.0%	Defined

COMMERCE BANK

$467,016

0.16%

17,557

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

Manager	Shares	Value (USD)	% of position	Discretion
COMMERCE BANCSHARES INC /MO/	17,557	$467,016	100.0%	Sole

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$446,481

0.15%

16,785

State of New Jersey Common Pension Fund D

$422,700

0.14%

15,891

AMERICAN CENTURY COMPANIES INC

$403,788

0.14%

15,180

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	15,180	$403,788	100.0%	Defined

Marquette Asset Management, LLC

$392,323

0.13%

14,749

LAZARD ASSET MANAGEMENT LLC

$388,998

0.13%

14,624

Moran Wealth Management, LLC

$381,178

0.13%

14,330

Tidal Investments LLC

$378,970

0.13%

14,247

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

Manager	Shares	Value (USD)	% of position	Discretion
VISTASHARES ADVISORS LLC	14,247	$378,970	100.0%	Defined

Nuveen, LLC

$367,478

0.12%

13,815

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

Manager	Shares	Value (USD)	% of position	Discretion
Nuveen Asset Management, LLC joint	246	$6,543	1.8%	Defined
TEACHERS ADVISORS, LLC joint	13,569	$360,935	98.2%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$367,080

0.12%

13,800

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

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	13,800	$367,080	100.0%	Other

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$356,440

0.12%

13,400

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

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	13,400	$356,440	100.0%	Other

CITIZENS FINANCIAL GROUP INC/RI

$310,156

0.10%

11,660

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

Manager	Shares	Value (USD)	% of position	Discretion
CITIZENS PRIVATE WEALTH, LLC	11,660	$310,156	100.0%	Defined

DEUTSCHE BANK AG\

$294,222

0.10%

11,061

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

Manager	Shares	Value (USD)	% of position	Discretion
DWS INVESTMENT MANAGEMENT AMERICAS, INC	3,651	$97,116	33.0%	Defined
DWS Investments UK Ltd	7,410	$197,106	67.0%	Defined

GABELLI FUNDS LLC

$244,241

0.08%

9,182

Invesco Ltd.

$242,936

0.08%

9,133

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

Manager	Shares	Value (USD)	% of position	Discretion
Invesco Advisers, Inc. joint	929	$24,711	10.2%	Defined
Invesco Trust Co joint	2,998	$79,746	32.8%	Defined
Invesco Capital Management LLC	5,206	$138,479	57.0%	Defined

BANK OF AMERICA CORP /DE/

$237,617

0.08%

8,933

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

Manager	Shares	Value (USD)	% of position	Discretion
BANK OF AMERICA NA	8,933	$237,617	100.0%	Defined

Empirical Asset Management, LLC

$228,760

0.08%

8,600

RHUMBLINE ADVISERS

$219,343

0.07%

8,246

Quinn Opportunity Partners LLC

$213,225

0.07%

8,016

INDEPENDENT INVESTORS INC

$201,734

0.07%

7,584

WELLS FARGO & COMPANY/MN

$173,431

0.06%

6,520

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

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO BANK N A	6,232	$165,771	95.6%	Defined
WELLS FARGO ADVISORS FINANCIAL NETWORK, LLC	1	$26	0.0%	Defined
WELLS FARGO CLEARING SERVICES, LLC	165	$4,389	2.5%	Defined
Wells Fargo Securities, LLC	122	$3,245	1.9%	Defined

MetLife Investment Management, LLC

$131,829

0.04%

4,956

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

Manager	Shares	Value (USD)	% of position	Discretion
METLIFE INC	4,956	$131,829	100.0%	Defined

Russell Investments Group, Ltd.

$108,845

0.04%

4,092

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

Manager	Shares	Value (USD)	% of position	Discretion
Russell Investment Management, LLC	4,089	$108,767	99.9%	Defined
Russell Investments Capital, LLC	1	$26	0.0%	Defined
Russell Investments France SAS	1	$26	0.0%	Defined
Russell Investments Trust Company	1	$26	0.0%	Defined

CITIGROUP INC

$97,914

0.03%

3,681

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	3,681	$97,914	100.0%	Defined

MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.

$92,913

0.03%

3,493

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

Manager	Shares	Value (USD)	% of position	Discretion
Global X Management CO LLC joint	3,493	$92,913	100.0%	Defined

JPMORGAN CHASE & CO

$83,816

0.03%

3,151

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.	3,144	$83,630	99.8%	Defined
J.P. Morgan Investment Management Inc.	5	$133	0.2%	Defined
J.P. Morgan Securities LLC	2	$53	0.1%	Defined

Vanguard Global Advisers, LLC

$79,613

0.03%

2,993

Police & Firemen's Retirement System of New Jersey

$46,204

0.02%

1,737

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

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Capital	1,737	$46,204	100.0%	Defined

Arax Advisory Partners

$39,155

0.01%

1,472

NEW YORK STATE COMMON RETIREMENT FUND

$38,676

0.01%

1,454

STRS OHIO

$37,240

0.01%

1,400

BNP PARIBAS ARBITRAGE, SA

$34,580

0.01%

1,300

BARCLAYS PLC

$32,451

0.01%

1,220

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

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	1,023	$27,211	83.9%	Defined
BARCLAYS CAPITAL INC.	197	$5,240	16.1%	Defined

Hilltop National Bank

$26,945

0.01%

1,013

FMR LLC

$24,817

0.01%

933

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	873	$23,221	93.6%	Defined
STRATEGIC ADVISERS LLC	60	$1,596	6.4%	Defined

ROYAL BANK OF CANADA

$24,711

0.01%

929

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

Manager	Shares	Value (USD)	% of position	Discretion
RBC CMA LTD.	202	$5,373	21.7%	Defined
RBC Capital Markets, LLC	650	$17,290	70.0%	Defined
RBC Rochdale, LLC	77	$2,048	8.3%	Defined

Ameritas Investment Partners, Inc.

$20,269

0.01%

762

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

Manager	Shares	Value (USD)	% of position	Discretion
EATON VANCE MANAGEMENT	762	$20,269	100.0%	Other

NISA INVESTMENT ADVISORS, LLC

$18,859

0.01%

709

Legal & General Group Plc

$17,955

0.01%

675

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

Manager	Shares	Value (USD)	% of position	Discretion
Legal & General Investment Management America Inc	675	$17,955	100.0%	Defined

Tower Research Capital LLC (TRC)

$12,448

0.00%

468

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)	468	$12,448	100.0%	Defined

Versant Capital Management, Inc

$8,884

0.00%

334

Cullen/Frost Bankers, Inc.

$5,506

0.00%

207

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

Manager	Shares	Value (USD)	% of position	Discretion
Frost Bank - FWA	207	$5,506	100.0%	Defined

ASSETMARK, INC

$4,256

0.00%

160

Sterling Capital Management LLC

$4,069

0.00%

153

MONTAG A & ASSOCIATES INC

$3,537

0.00%

133

Allworth Financial LP

$3,165

0.00%

119

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM

$2,766

0.00%

104

Quent Capital, LLC

$2,447

0.00%

GAMMA Investing LLC

$2,314

0.00%

JONES FINANCIAL COMPANIES LLLP

$1,968

0.00%

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.	74	$1,968	100.0%	Sole

NATIXIS

$1,702

0.00%

EverSource Wealth Advisors, LLC

$1,621

0.00%

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

Manager	Shares	Value (USD)	% of position	Discretion
BMSS Wesson Wealth Solutions, LLC	3	$79	4.9%	Sole
Held directly	58	$1,542	95.1%	Sole

Leonteq Securities AG

$1,170

0.00%

Essential Partners LLC

$1,090

0.00%

Lummis Asset Management, LP

$957

0.00%

Costello Asset Management, INC

$957

0.00%

ROTHSCHILD INVESTMENT LLC

$877

0.00%

Global Retirement Partners, LLC

$824

0.00%

PNC FINANCIAL SERVICES GROUP, INC.

$824

0.00%

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

Manager	Shares	Value (USD)	% of position	Discretion
PNC Bank, National Association	31	$824	100.0%	Defined

IFP Advisors, Inc

$771

0.00%

McMillan Office, Inc.

$744

0.00%

Farther Finance Advisors, LLC

$718

0.00%

Smartleaf Asset Management LLC

$425

0.00%

SBI Securities Co., Ltd.

$372

0.00%

North Star Investment Management Corp.

$345

0.00%

OSAIC HOLDINGS, INC.

$266

0.00%

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

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	10	$266	100.0%	Defined

Ancora Advisors LLC

$239

0.00%

Key facts CIK 2009684 CUSIP 812215200 13F (30d) 34 filings 34 filers Visit website Investor relations