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Simplex Trading

Simplex Trading Portfolio holdings

AUM $149B
1-Year Est. Return 62.07%
 

Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.

This Fund
S&P 500
This Quarter Est. Return
+6.46%
1 Year Est. Return
+62.07%
3 Year Est. Return
+116.86%
5 Year Est. Return
+116.02%
10 Year Est. Return
+774.44%
AUM
$122B
AUM Growth
+$7.84B
Cap. Flow
-$3.39B
Cap. Flow %
-2.78%
Top 10 Hldgs %
42.57%
Holding
10,535
New
1,474
Increased
3,350
Reduced
3,913
Closed
1,517

Top Buys

Rank Stock Value
1
MSFT icon
Microsoft
MSFT
+$53.9M
2
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$52.9M
3
NVDA icon
NVIDIA
NVDA
+$47.1M
4
PYPL icon
PayPal
PYPL
+$41.7M
5
GOOG icon
Alphabet (Google) Class C
GOOG
+$28.4M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$51.4M
2
WMT icon
Walmart Inc
WMT
+$46.4M
3
OIH icon
VanEck Oil Services ETF
OIH
+$34.2M
4
ADBE icon
Adobe
ADBE
+$33.5M
5
SBUX icon
Starbucks
SBUX
+$26.8M

Sector Composition

Rank Sector Weight
1 Technology 0.41%
2 Healthcare 0.21%
3 Consumer Discretionary 0.21%
4 Communication Services 0.2%
5 Financials 0.15%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
PCY icon
9676
Invesco Emerging Markets Sovereign Debt ETF
PCY
$1.37B
– –
-167
Closed -$3K
PDD icon
9677
Pinduoduo
PDD
$117B
– –
-312,591
Closed -$21.5M
PEB icon
9678
CALL
Pebblebrook Hotel Trust
PEB
$2.17B
– –
-1,100
Closed -$15K
PEBO icon
9679
Peoples Bancorp
PEBO
$1.41B
– –
-400
Closed -$10K
PEBO icon
9680
PUT
Peoples Bancorp
PEBO
$1.41B
– –
-500
Closed -$12K
PEGA icon
9681
CALL
Pegasystems
PEGA
$4.29B
– –
-4,200
Closed -$101K
PEGA icon
9682
Pegasystems
PEGA
$4.29B
– –
-2,184
Closed -$52K
PEGA icon
9683
PUT
Pegasystems
PEGA
$4.29B
– –
-10,800
Closed -$261K
PENN icon
9684
PENN Entertainment
PENN
$2.73B
– –
-19,033
Closed -$507K
PESI icon
9685
PUT
Perma-Fix Environmental Services
PESI
$342M
– –
-9,300
Closed -$109K
PEY icon
9686
Invesco High Yield Equity Dividend Achievers ETF
PEY
$1.13B
– –
-5,438
Closed -$108K
PFFD icon
9687
Global X US Preferred ETF
PFFD
$2.14B
– –
-7,503
Closed -$149K
PFS icon
9688
Provident Financial Services
PFS
$3.09B
– –
-165
Closed -$2.81K
PGJ icon
9689
Invesco Golden Dragon China ETF
PGJ
$93.4M
– –
-6,376
Closed -$189K
PGRE
9690
DELISTED
Paramount Group
PGRE
$0 ﹤0.01%
+102
New +$454
PGX icon
9691
Invesco Preferred ETF
PGX
$3.83B
$0 ﹤0.01%
64
-20
-24% -$227
PH icon
9692
Parker-Hannifin
PH
$123B
– –
-1,201
Closed -$406K
PHUN icon
9693
Phunware
PHUN
$44.8M
$0 ﹤0.01%
+29
New +$886
PICK icon
9694
iShares MSCI Global Metals & Mining Producers ETF
PICK
$2.19B
– –
-1,641
Closed -$70K
PINC
9695
DELISTED
Premier
PINC
– –
-959
Closed -$27.4K
PINC
9696
PUT
DELISTED
Premier
PINC
– –
-100
Closed -$3K
PJT icon
9697
CALL
PJT Partners
PJT
$4.23B
– –
-700
Closed -$50K
PJP icon
9698
Invesco Pharmaceuticals ETF
PJP
$423M
– –
-395
Closed -$30K
PKE icon
9699
PUT
Park Aerospace
PKE
$748M
– –
-3,800
Closed -$51K
PKOH icon
9700
Park-Ohio Holdings
PKOH
$537M
– –
-753
Closed -$11.5K
386 387
388
389 390

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Simplex Trading's Q2 2023 Portfolio in Review

As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.

Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.

By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.

  • Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
  • Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
  • Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
  • Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
  • Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
  • Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
  • Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.

Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.