Simplex Trading Portfolio holdings
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.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
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 | |
|---|---|---|---|---|---|---|
|
QVCGA
3926
PUT
DELISTED
QVC Group Inc Series A
QVCGA
| $281K | ﹤0.01% |
5,696
+5,670
| +21,808% | +$255K |
|
3927
CALL
Gartner
IT
$10.4B
| $280K | ﹤0.01% |
800
-8,100
| -91% | -$2.64M |
|
|
3928
Gartner
IT
$10.4B
| $280K | ﹤0.01% |
801
-1,722
| -68% | -$561K |
|
3929
LiveRamp
RAMP
$2.29B
| $280K | ﹤0.01% |
9,812
+5,798
| +144% | +$144K |
|
3930
Xometry
XMTR
$4.58B
| $280K | ﹤0.01% |
13,247
+12,139
| +1,096% | +$212K |
|
|
IRBT
3931
DELISTED
iRobot
IRBT
| $279K | ﹤0.01% |
+6,170
| New | +$246K |
|
3932
Primerica
PRI
$10B
| $279K | ﹤0.01% |
1,413
+838
| +146% | +$154K |
|
3933
PUT
Voya Financial
VOYA
$9.07B
| $279K | ﹤0.01% |
3,900
-41,100
| -91% | -$2.95M |
|
|
ABK
3934
CALL
DELISTED
Ambac Financial Group
ABK
| $279K | ﹤0.01% |
19,600
-124,100
| -86% | -$1.77M |
|
3935
CALL
Arbutus Biopharma
ABUS
$871M
| $278K | ﹤0.01% |
121,200
-75,700
| -38% | -$197K |
|
3936
PUT
Telus
TU
$16.7B
| $278K | ﹤0.01% |
14,300
+8,800
| +160% | +$177K |
|
3937
State Street Technology Select Sector SPDR ETF
XLK
$112B
| $278K | ﹤0.01% |
3,200
-243,414
| -99% | -$19.2M |
|
|
AMED
3938
DELISTED
Amedisys
AMED
| $277K | ﹤0.01% |
+3,038
| New | +$249K |
|
3939
CALL
Reinsurance Group of America
RGA
$15.9B
| $277K | ﹤0.01% |
2,000
+1,700
| +567% | +$242K |
|
|
UCAR
3940
PUT
U Power Ltd
UCAR
$25.7M
| $277K | ﹤0.01% |
+39
| New | +$251K |
|
|
ERF
3941
CALL
DELISTED
Enerplus Corporation
ERF
| $277K | ﹤0.01% |
19,200
+5,900
| +44% | +$86K |
|
3942
PUT
Appian
APPN
$2.01B
| $276K | ﹤0.01% |
5,800
-1,600
| -22% | -$67.4K |
|
|
RC
3943
PUT
Ready Capital
RC
$261M
| $276K | ﹤0.01% |
24,500
+4,900
| +25% | +$51.7K |
|
3944
CALL
Valaris
VAL
$5.16B
| $276K | ﹤0.01% |
4,400
+3,700
| +529% | +$223K |
|
3945
PUT
Arhaus
ARHS
$1.12B
| $275K | ﹤0.01% |
26,400
-1,400
| -5% | -$11.4K |
|
3946
PUT
BioXcel Therapeutics
BTAI
$26.1M
| $275K | ﹤0.01% |
2,588
+1,575
| +155% | +$524K |
|
|
RVPH
3947
PUT
DELISTED
REVIVA PHARMA HLDGS INC
RVPH
| $275K | ﹤0.01% |
2,350
+1,065
| +83% | +$135K |
|
3948
CALL
NextDecade
NEXT
$1.63B
| $274K | ﹤0.01% |
33,400
+27,100
| +430% | +$166K |
|
3949
CALL
Digimarc Corp
DMRC
$145M
| $273K | ﹤0.01% |
9,300
+5,300
| +133% | +$130K |
|
|
NNDM
3950
Nano Dimension
NNDM
$314M
| $273K | ﹤0.01% |
+94,752
| New | +$235K |
|
Similar funds
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.