CenterBook Partners LP — 13F Holdings & Portfolio

CIK 1872738 · latest 13F-HR filed 2026-11-02

CenterBook Partners LP manages $2.18B in 13F-reported U.S. long-equity assets across 855 reported positions as of its 2026-09-30 13F-HR filing. Its largest disclosed positions are AMZN (1.47%), META (1.24%), GOOGL (1.18%). Quarter over quarter (versus its 2026-06-30 filing) the fund opened 382 new positions and exited 220; 239 existing positions rose in reported value and 215 fell.

AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.

AUM

$2.18B

Long-equity book

Holdings

855

Distinct positions

Period

2026-09-30

Filed 2026-11-02

Q/Q Activity

+382 / −220 / ↑239 / ↓215

vs 2026-06-30

Portfolio charts

Latest quarter's book, what changed, and how the portfolio has evolved across filings.

Portfolio map

Q3 26

AMZN1.5% · -39%META1.2% · -51%GOOGL1.2% · -42%NVDA1.1% · -39%MSFT1.1% · -55%TSM1.1% · -27%AAPL1.0% · -34%MU1.0% · +31%BRK.B0.9% · -28%SNOW0.9% · +123%TKO0.9% · +236%MOD0.9% · +2128%JPM0.9% · -14%ORCL0.9% · +1486%INTC0.8% · +1382%AMAT0.8% · +324%LIN0.8% · new NU0.8% · +95%SPCX0.8% · -10%MA0.7% · -43%FTAI0.7% · +69%COST0.7% · new TLN0.7% · +107%ON0.7% · +162%AVGO0.7% · -41%AESI0.7% · +85%ABVX0.6% · +321%ASML0.6% · +80%FN0.6% · +65%KLAC0.6% · +1205%COHR0.6% · +274%PLTR0.6% · -48%INSM0.6% · +10%CLS0.6% · +472%SNDK0.6% · new NBIS0.6% · +273%V0.6% · -64%AEIS0.6% · +32%UBER0.6% · +30%ARGX0.5% · +2474%PRAX0.5% · new AMP0.5% · +231%AEO0.5% · +1121%LPTH0.5% · +118%PCAR0.5% · new PRM0.5% · +140%LLY0.5% · -62%NOW0.5% · +51%FSLR0.5% · +121%ABNB0.5% · new REGN0.4% · -17%FIP0.4% · +78%BNTX0.4% · -62%HD0.4% · new STX0.4% · new GE0.4% · new AIOT0.4% · -24%MWH0.4% · +91%CMPS0.4% · +454%HNRG0.4% · +82%

Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.

Sector mix

% of 13F value

Sectors from each company's SIC code; funds and ETFs grouped separately.

Biggest buys and sells

Q2 26 → Q3 26

Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.

13F assets and positions

4 quarters

Total reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.

Top positions over time

reported value

The eight largest current positions, valued at each quarter end.

Concentration

top 10 = 11%

Cumulative share of the portfolio held in the largest N positions.

Firm Profile & Key People

As of the firm’s regulatory filing dated Aug 26, 2026.

Assets Under Management

$2.91B

Discretionary

$2.91B

Employees

Accounts

Address

55 RAILROAD AVENUE
GREENWICH, CT 06830

Phone

(203) 485-5200

Website

www.centerbook.com
www.linkedin.com/company/centerbook-partners-lp
centerbookpartners.com

Name	Title / Status	Ownership	Type
CBP-AT MEMBERS LP Control	LIMITED PARTNER since Dec 2020	75% or more	Domestic Entity
CENTERBOOK PARTNERS, LLC Control	GENERAL PARTNER since Dec 2020	Less than 5%	Domestic Entity
MENNITT, MARK, PHILIP Control	CHIEF OPERATING OFFICER, CHIEF FINANCIAL OFFICER since Dec 2020	Less than 5%	Individual
STEMERMAN, DAVID, ISRAEL Control	CHIEF EXECUTIVE OFFICER, CHIEF INVESTMENT OFFICER since Dec 2020	Less than 5%	Individual
BREEN, CARRIE, ELLEN	CHIEF COMPLIANCE OFFICER since Apr 2026	Less than 5%	Individual
ALPHA THEORY, LLC Control Indirect owner via CENTERBOOK PARTNERS, LLC	MANAGING MEMBER since Jan 2020	75% or more	Domestic Entity
ALPHA THEORY, LLC Control Indirect owner via CBP-AT MEMBERS LP	LIMITED PARTNER since Jan 2020	75% or more	Domestic Entity
HIGHT, CAMERON, BRANT Control Indirect owner via ALPHA THEORY, LLC	MANAGING MEMBER since Dec 2005	25–50%	Individual

Ownership & leadership changes · 3 filings with changes since May 18, 2021

From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.

Apr 21, 2026 filing

AddedBREEN, CARRIE, ELLEN · CHIEF COMPLIANCE OFFICER · Less than 5%
ChangedMENNITT, MARK, PHILIP · title CHIEF OPERATING OFFICER, CHIEF FINANCIAL OFFICER, CHIEF COMPLIANCE OFFICER → CHIEF OPERATING OFFICER, CHIEF FINANCIAL OFFICER

Mar 27, 2023 filing

ChangedALPHA THEORY, LLC · indirect via CBP-AT MEMBERS LP: ownership 25–50% → 75% or more

Feb 4, 2022 filing

No longer listedHIGHT, CAMERON, BRANT · LIMITED PARTNER · 25–50% · indirect via CBP-AT MEMBERS LP · control person · listed since Jan 2020
AddedALPHA THEORY, LLC · LIMITED PARTNER · 25–50% · indirect via CBP-AT MEMBERS LP · control person

May 18, 2021 filing (earliest on record)

ListedALPHA THEORY, LLC · MANAGING MEMBER · 75% or more · indirect via CENTERBOOK PARTNERS, LLC · control person
ListedCBP-AT MEMBERS LP · LIMITED PARTNER · 75% or more · control person
ListedCENTERBOOK PARTNERS, LLC · GENERAL PARTNER · Less than 5% · control person
ListedHIGHT, CAMERON, BRANT · MANAGING MEMBER · 25–50% · indirect via ALPHA THEORY, LLC · control person
ListedHIGHT, CAMERON, BRANT · LIMITED PARTNER · 25–50% · indirect via CBP-AT MEMBERS LP · control person
ListedMENNITT, MARK, PHILIP · CHIEF OPERATING OFFICER, CHIEF FINANCIAL OFFICER, CHIEF COMPLIANCE OFFICER · Less than 5% · control person
ListedSTEMERMAN, DAVID, ISRAEL · CHIEF EXECUTIVE OFFICER, CHIEF INVESTMENT OFFICER · Less than 5% · control person

Quarter-over-quarter changes

Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.

Top Adds (vs prior quarter)

MODINE MFG CO$18.7M +1462.4%
ORACLE CORP$18.0M +1386.1%
INTEL CORP$17.0M +1176.3%
TKO GROUP HOLDINGS INC$13.4M +199.8%
SNOWFLAKE INC$13.3M +197.3%

Show all 239 →

Top Trims

TEXAS INSTRS INC-$26.6M -87.6%
NETFLIX INC.-$21.1M -83.1%
VISA INC-$20.7M -62.1%
ADVANCED MICRO DEVICES INC-$20.2M -95.5%
ALPHABET INC-$20.0M -43.7%

Show all 215 →

New Positions

Show all 382 →

Exited Positions

Show all 220 →

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#	Issuer	Symbol	CUSIP	Value	Δ

CenterBook Partners LP Holdings (2026-09-30)

#	Issuer	Symbol	CUSIP	Value	Weight	Shares	Type
1	AMAZON COM INC	AMZN	023135106	$32.1M	1.47%	128,799	SH
2	META PLATFORMS INC	META	30303M102	$26.9M	1.24%	37,149	SH
3	ALPHABET INC	GOOGL	02079K305	$25.8M	1.18%	74,947	SH
4	NVIDIA CORPORATION	NVDA	67066G104	$25.0M	1.15%	109,433	SH
5	MICROSOFT CORP	MSFT	594918104	$24.1M	1.11%	47,080	SH
6	TAIWAN SEMICONDUCTOR MANUFAC	TSM	874039100	$23.9M	1.10%	52,350	SH
7	APPLE INC	AAPL	037833100	$21.6M	0.99%	64,782	SH
8	MICRON TECHNOLOGY INC	MU	595112103	$21.1M	0.97%	19,854	SH
9	BERKSHIRE HATHAWAY INC DEL	BRK.B	084670702	$20.3M	0.93%	40,716	SH
10	SNOWFLAKE INC	SNOW	833445109	$20.1M	0.92%	59,184	SH
11	TKO GROUP HOLDINGS INC	TKO	87256C101	$20.1M	0.92%	111,589	SH
12	MODINE MFG CO	MOD	607828100	$20.0M	0.92%	106,992	SH
13	JPMORGAN CHASE & CO	JPM	46625H100	$19.6M	0.90%	59,341	SH
14	ORACLE CORP	ORCL	68389X105	$19.3M	0.89%	140,622	SH
15	INTEL CORP	INTC	458140100	$18.5M	0.85%	153,514	SH
16	APPLIED MATLS INC	AMAT	038222105	$18.5M	0.85%	36,079	SH
17	LINDE PLC	LIN	G54950103	$17.3M	0.79%	36,426	SH
18	NU HLDGS LTD	NU	G6683N103	$17.2M	0.79%	1,354,881	SH
19	SPACE EXPLORATION TECHN CORP	SPCX	84615Q103	$16.5M	0.75%	109,105	SH
20	MASTERCARD INCORPORATED	MA	57636Q104	$16.2M	0.74%	29,325	SH
21	FTAI AVIATION LTD	FTAI	G3730V105	$15.6M	0.71%	93,225	SH
22	COSTCO WHOLESALE CORPORATION	COST	22160K105	$14.9M	0.69%	16,417	SH
23	TALEN ENERGY CORP	TLN	87422Q109	$14.4M	0.66%	46,080	SH
24	ON SEMICONDUCTOR CORP	ON	682189105	$14.4M	0.66%	187,420	SH
25	BROADCOM INC	AVGO	11135F101	$14.2M	0.65%	40,564	SH
26	ATLAS ENERGY SOLUTIONS INC	AESI	642045108	$14.2M	0.65%	1,180,943	SH
27	ABIVAX SA	ABVX	00370M103	$14.1M	0.65%	142,496	SH
28	ASML HLDG NV	ASML	N07059210	$13.8M	0.63%	7,597	SH
29	FABRINET	FN	G3323L100	$13.4M	0.62%	31,691	SH
30	KLA CORP	KLAC	482480100	$13.3M	0.61%	68,290	SH
31	COHERENT CORP	COHR	19247G107	$13.2M	0.61%	45,932	SH
32	PALANTIR TECHNOLOGIES INC	PLTR	69608A108	$13.2M	0.60%	70,369	SH
33	INSMED INC	INSM	457669307	$13.0M	0.60%	113,720	SH
34	CELESTICA INC	CLS	15101Q207	$13.0M	0.59%	35,892	SH
35	SANDISK CORP	SNDK	80004C200	$12.7M	0.58%	7,303	SH
36	NEBIUS GROUP N.V.	NBIS	N97284108	$12.7M	0.58%	53,652	SH
37	VISA INC	V	92826C839	$12.6M	0.58%	35,157	SH
38	ADVANCED ENERGY INDS	AEIS	007973100	$12.4M	0.57%	44,006	SH
39	UBER TECHNOLOGIES INC	UBER	90353T100	$12.1M	0.56%	176,740	SH
40	ARGENX SE	ARGX	04016X101	$11.7M	0.54%	12,226	SH
41	PRAXIS PRECISION MEDICINES I	PRAX	74006W207	$11.2M	0.51%	38,537	SH
42	AMERIPRISE FINL INC	AMP	03076C106	$11.2M	0.51%	22,698	SH
43	AMERICAN EAGLE OUTFITTERS IN	AEO	02553E106	$11.1M	0.51%	622,116	SH
44	LIGHTPATH TECHNOLOGIES INC	LPTH	532257805	$10.7M	0.49%	1,042,156	SH
45	PACCAR INC	PCAR	693718108	$10.5M	0.48%	96,063	SH
46	PERIMETER SOLUTIONS INC	PRM	71385M107	$10.2M	0.47%	387,773	SH
47	ELI LILLY & CO	LLY	532457108	$10.1M	0.46%	8,749	SH
48	SERVICENOW INC	NOW	81762P102	$10.1M	0.46%	75,438	SH
49	FIRST SOLAR INC	FSLR	336433107	$10.0M	0.46%	57,068	SH
50	AIRBNB INC	ABNB	009066101	$9.9M	0.45%	61,470	SH

Filing History

Period	Filed	AUM	Holdings	Accession
2026-09-30	2026-11-02	$2.18B	855	0001872738-26-000012
2026-06-30	2026-08-11	$2.04B	693	0001872738-26-000010
2026-03-31	2026-05-05	$1.86B	628	0001872738-26-000008
2025-12-31	2026-02-11	$2.05B	541	0000902664-26-000841

Filer Information

Address

55 RAILROAD AVENUE
SUITE 302
GREENWICH, CT 06830

Phone

(203) 485-5280

Filing Manager

CenterBook Partners LP

GREENWICH, CT

Signatory

Carrie Breen

CCO & Counsel