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Atom Investors LP — 13F Holdings & Portfolio

CIK 1738902 · latest 13F-HR filed 2026-08-14

Backtest portfolio

Atom Investors LP manages $1.12B in 13F-reported U.S. long-equity assets across 818 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are VOO (4.09%), VTRS (1.00%), INTC (0.94%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 418 new positions and exited 241; 155 existing positions rose in reported value and 225 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.

Loading holdings…
AUM
$1.12B

Long-equity book

Holdings
818

Distinct positions

Period
2026-06-30

Filed 2026-08-14

Q/Q Activity
+418 / −241 / ↑155 / ↓225

vs 2026-03-31

Portfolio charts

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

Portfolio map

Q2 26
VOO4.1% · -0%VTRS1.0% · +561%INTC0.9% · +262%HPE0.9% · newRYTM0.7% · +29%ESAB0.7% · +238%EWZ0.7% · newGXO0.7% · +44%AMAT0.6% · -50%AVGO0.6% · -51%NVDA0.6% · -41%VSEC0.6% · newAAPL0.6% · newIMNM0.6% · -3%JBTM0.5% · newVRSN0.5% · +308%EQIX0.5% · -52%RSP0.5% · newHD0.5% · newRARE0.5% · +84%GGG0.5% · newAME0.5% · +62%MSFT0.5% · +31%TTMI0.5% · +244%AMZN0.5% · -54%GOOG0.5% · -1%ZETA0.5% · newSLGN0.4% · newFERG0.4% · newSMTC0.4% · +303%MU0.4% · newABT0.4% · +140%LECO0.4% · +5%LRCX0.4% · newED0.4% · +300%MGRC0.3% · newLOW0.3% · newMA0.3% · newNPK0.3% · +7%HNI0.3% · +42%RS0.3% · -66%SUPN0.3% · +75%GILD0.3% · newDNTH0.3% · -66%CNM0.3% · +941%CELC0.3% · -55%PEP0.3% · newSNDX0.3% · +4%NRG0.3% · -48%MBUU0.3% · -45%FAST0.3% · newEXP0.3% · newAXSM0.3% · +73%CVBF0.3% · -14%BXC0.3% · -6%FDX0.3% · newSBUX0.3% · newBSY0.3% · +39%IOSP0.3% · +0%AMTM0.3% · +605%

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

Q1 26 → Q2 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 Jul 27, 2026.

Assets Under Management
$6.83B
Discretionary
$6.83B
Employees
24
Accounts
7
Address
3711 S MOPAC EXPY, BUILDING ONE
SUITE 100
AUSTIN, TX 78746
Phone
(737) 249-0292
Website
This firm reports 1 disclosure item on its registration.
Name Title / Status Ownership Type
ATOM GP LLC ControlGENERAL PARTNER
since Feb 2018
Less than 5%Domestic Entity
ATOM STRATEGIES LLC ControlLIMITED PARTNER
since Dec 2019
50–75%Domestic Entity
AVITABILE, LAWRENCE, ALLEN ControlCHIEF OPERATING OFFICER / CHIEF FINANCIAL OFFICER
since Sep 2022
Less than 5%Individual
FUSION INVESTORS LLC ControlLIMITED PARTNER
since May 2018
25–50%Domestic Entity
GOLDBERG, ELIZA, KATZTER ControlCHIEF COMPLIANCE OFFICER
since Aug 2022
Less than 5%Individual
QUNIBI, BASIL ControlCHAIRMAN / CHIEF EXECUTIVE OFFICER / CHIEF INVESTMENT OFFICER
since Feb 2018
Less than 5%Individual
FAI HOLDINGS LLCLIMITED PARTNER
since Dec 2021
5–10%Domestic Entity
FUSION INVESTORS LLC Control
Indirect owner via ATOM GP LLC
MANAGING MEMBER
since Feb 2018
25–50%Domestic Entity
QUNIBI, BASIL Control
Indirect owner via FUSION INVESTORS LLC
MEMBER
since Feb 2018
25–50%Individual
QUNIBI, BASIL Control
Indirect owner via FAI HOLDINGS LLC
MANAGING MEMBER
since Dec 2021
50–75%Individual
Ownership & leadership changes · 7 filings with changes since Apr 19, 2018

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.

Mar 28, 2023 filing
  • ChangedATOM STRATEGIES LLC · ownership 25–50% → 50–75%
  • ChangedFAI HOLDINGS LLC · ownership 10–25% → 5–10%
  • ChangedFUSION INVESTORS LLC · indirect via ATOM GP LLC: ownership 75% or more → 25–50%
  • ChangedFUSION INVESTORS LLC · ownership 50–75% → 25–50%
  • ChangedQUNIBI, BASIL · indirect via FAI HOLDINGS LLC: ownership 75% or more → 50–75%
Oct 3, 2022 filing
  • No longer listedCUNNINGHAM, JOHN, PAUL · CHIEF OPERATING OFFICER / CHIEF FINANCIAL OFFICER · Less than 5% · control person · listed since Feb 2018
  • No longer listedFISHER, CRAIG, ANDREW · GENERAL COUNSEL / CHIEF COMPLIANCE OFFICER · Less than 5% · control person · listed since Mar 2018
  • AddedAVITABILE, LAWRENCE, ALLEN · CHIEF OPERATING OFFICER / CHIEF FINANCIAL OFFICER · Less than 5% · control person
  • AddedGOLDBERG, ELIZA, KATZTER · CHIEF COMPLIANCE OFFICER · Less than 5% · control person
Mar 30, 2022 filing
  • AddedFAI HOLDINGS LLC · LIMITED PARTNER · 10–25%
  • AddedQUNIBI, BASIL · MANAGING MEMBER · 75% or more · indirect via FAI HOLDINGS LLC · control person
Mar 31, 2021 filing
  • ChangedFUSION INVESTORS LLC · indirect via ATOM GP LLC: ownership 50–75% → 75% or more
Mar 27, 2020 filing
  • AddedATOM STRATEGIES LLC · LIMITED PARTNER · 25–50% · control person
  • ChangedCUNNINGHAM, JOHN, PAUL · ownership 5–10% → Less than 5%
  • ChangedFUSION INVESTORS LLC · indirect via ATOM GP LLC: ownership 75% or more → 50–75%
  • ChangedQUNIBI, BASIL · ownership 5–10% → Less than 5%
Mar 29, 2019 filing
  • ChangedCUNNINGHAM, JOHN, PAUL · ownership Less than 5% → 5–10%
Jun 15, 2018 filing
  • AddedFUSION INVESTORS LLC · LIMITED PARTNER · 50–75% · control person
  • ChangedATOM GP LLC · ownership 75% or more → Less than 5%
  • ChangedQUNIBI, BASIL · ownership 25–50% → 5–10%
Apr 19, 2018 filing (earliest on record)
  • ListedATOM GP LLC · GENERAL PARTNER · 75% or more · control person
  • ListedCUNNINGHAM, JOHN, PAUL · CHIEF OPERATING OFFICER / CHIEF FINANCIAL OFFICER · Less than 5% · control person
  • ListedFISHER, CRAIG, ANDREW · GENERAL COUNSEL / CHIEF COMPLIANCE OFFICER · Less than 5% · control person
  • ListedFUSION INVESTORS LLC · MANAGING MEMBER · 75% or more · indirect via ATOM GP LLC · control person
  • ListedQUNIBI, BASIL · CHAIRMAN / CHIEF EXECUTIVE OFFICER / CHIEF INVESTMENT OFFICER · 25–50% · control person
  • ListedQUNIBI, BASIL · MEMBER · 25–50% · indirect via FUSION INVESTORS LLC · 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)

Show all 155 →

Top Trims

Show all 225 →

New Positions

Show all 418 →

Exited Positions

Show all 241 →

Atom Investors LP Holdings (2026-06-30)

Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).

# Issuer Symbol CUSIP Value Weight Shares Type
1 VANGUARD INDEX FDS VOO 922908363 $46.0M 4.09% 66,972 SH
2 VIATRIS INC VTRS 92556V106 $11.2M 1.00% 705,683 SH
3 INTEL CORP INTC 458140100 $10.6M 0.94% 76,015 SH
4 HEWLETT PACKARD ENTERPRISE C HPE 42824C109 $9.7M 0.86% 215,283 SH
5 RHYTHM PHARMACEUTICALS INC RYTM 76243J105 $8.2M 0.73% 73,465 SH
6 ESAB CORPORATION ESAB 29605J106 $8.1M 0.72% 82,405 SH
7 ISHARES INC EWZ 464286400 $8.1M 0.72% 234,771 SH
8 GXO LOGISTICS INCORPORATED GXO 36262G101 $8.0M 0.71% 156,873 SH
9 APPLIED MATLS INC AMAT 038222105 $7.0M 0.62% 9,715 SH
10 BROADCOM INC AVGO 11135F101 $6.8M 0.61% 18,060 SH
11 NVIDIA CORPORATION NVDA 67066G104 $6.8M 0.60% 33,901 SH
12 VSE CORP VSEC 918284100 $6.5M 0.58% 28,386 SH
13 APPLE INC AAPL 037833100 $6.3M 0.56% 21,814 SH
14 IMMUNOME INC IMNM 45257U108 $6.3M 0.56% 297,489 SH
15 JBT MAREL CORPORATION JBTM 477839104 $6.2M 0.55% 42,492 SH
16 VERISIGN INC VRSN 92343E102 $6.1M 0.54% 24,293 SH
17 EQUINIX INC EQIX 29444U700 $6.0M 0.53% 5,714 SH
18 INVESCO EXCHANGE TRADED FD T RSP 46137V357 $5.9M 0.53% 27,764 SH
19 HOME DEPOT INC HD 437076102 $5.9M 0.52% 16,683 SH
20 ULTRAGENYX PHARMACEUTICAL IN RARE 90400D108 $5.7M 0.51% 171,771 SH
21 GRACO INC GGG 384109104 $5.7M 0.50% 74,973 SH
22 AMETEK INC AME 031100100 $5.5M 0.49% 22,891 SH
23 MICROSOFT CORP MSFT 594918104 $5.4M 0.48% 14,579 SH
24 TTM TECHNOLOGIES INC TTMI 87305R109 $5.4M 0.48% 28,908 SH
25 AMAZON COM INC AMZN 023135106 $5.4M 0.48% 22,644 SH
26 ALPHABET INC GOOG 02079K107 $5.4M 0.48% 15,198 SH
27 ZETA GLOBAL HOLDINGS CORP ZETA 98956A105 $5.2M 0.46% 264,086 SH
28 SILGAN HLDGS INC SLGN 827048109 $5.0M 0.44% 107,324 SH
29 FERGUSON ENTERPRISES INC FERG 31488V107 $5.0M 0.44% 20,966 SH
30 SEMTECH CORP SMTC 816850101 $4.9M 0.43% 30,064 SH
31 MICRON TECHNOLOGY INC MU 595112103 $4.7M 0.42% 4,068 SH
32 ABBOTT LABORATORIES ABT 002824100 $4.6M 0.41% 50,174 SH
33 LINCOLN ELEC HLDGS INC LECO 533900106 $4.5M 0.40% 16,908 SH
34 LAM RESEARCH CORP LRCX 512807306 $4.1M 0.37% 9,535 SH
35 CONSOLIDATED EDISON INC ED 209115104 $3.9M 0.35% 35,657 SH
36 MCGRATH RENTCORP MGRC 580589109 $3.9M 0.34% 32,013 SH
37 LOWES COS INC LOW 548661107 $3.9M 0.34% 17,565 SH
38 MASTERCARD INCORPORATED MA 57636Q104 $3.8M 0.34% 7,408 SH
39 NATIONAL PRESTO INDS INC NPK 637215104 $3.8M 0.34% 30,383 SH
40 HNI CORP HNI 404251100 $3.8M 0.34% 93,877 SH
41 RELIANCE INC RS 759509102 $3.7M 0.33% 10,023 SH
42 SUPERNUS PHARMACEUTICALS SUPN 868459108 $3.7M 0.33% 79,936 SH
43 GILEAD SCIENCES INC GILD 375558103 $3.7M 0.33% 29,028 SH
44 DIANTHUS THERAPEUTICS INC DNTH 252828108 $3.6M 0.32% 37,228 SH
45 CORE & MAIN INC CNM 21874C102 $3.6M 0.32% 74,801 SH
46 CELCUITY INC CELC 15102K100 $3.6M 0.32% 34,488 SH
47 PEPSICO INC PEP 713448108 $3.6M 0.32% 26,345 SH
48 SYNDAX PHARMACEUTICALS INC SNDX 87164F105 $3.6M 0.32% 162,524 SH
49 NRG ENERGY INC NRG 629377508 $3.5M 0.31% 24,183 SH
50 MALIBU BOATS INC MBUU 56117J100 $3.5M 0.31% 127,366 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-14 $1.12B 818 0001214659-26-010164
2026-03-31 2026-05-15 $1.40B 641 0001214659-26-006309
2025-12-31 2026-02-17 $1.26B 556 0001214659-26-001839
2025-09-30 2025-11-14 $1.32B 584 0001214659-25-016495
Filer Information
Address
3711 S MOPAC EXPY
BUILDING ONE, SUITE 100
AUSTIN, TX 78746
Phone
(737) 249-0292
Filing Manager
Atom Investors LP
AUSTIN, TX
Signatory
Eliza Goldberg
General Counsel and Chief Compliance Officer