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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2876
CALL
CNX Resources
CNX
$4.78B
| $1.26M | ﹤0.01% |
53,000
+14,600
| +38% | +$303K |
|
2877
CALL
State Street SPDR Portfolio Europe ETF
SPEU
$716M
| $1.25M | ﹤0.01% |
24,200
-54,400
| -69% | -$2.2M |
|
2878
CALL
Lightspeed Commerce
LSPD
$1.35B
| $1.25M | ﹤0.01% |
89,100
+64,500
| +262% | +$1.02M |
|
2879
CALL
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $1.25M | ﹤0.01% |
12,500
| – | – |
|
2880
NOV
NOV
$7.49B
| $1.25M | ﹤0.01% |
+64,131
| New | +$1.19M |
|
2881
CALL
Teradata
TDC
$2.81B
| $1.25M | ﹤0.01% |
32,300
+400
| +1% | +$16.9K |
|
2882
CALL
NCR Atleos
NATL
$3.49B
| $1.25M | ﹤0.01% |
63,200
+57,300
| +971% | +$1.23M |
|
2883
PUT
Sundial Growers
SNDL
$333M
| $1.25M | ﹤0.01% |
622,800
-340,500
| -35% | -$497K |
|
2884
CALL
Entergy
ETR
$53.3B
| $1.25M | ﹤0.01% |
23,600
-6,400
| -21% | -$324K |
|
2885
2x Bitcoin ETF
BITX
$925M
| $1.25M | ﹤0.01% |
23,408
+20,616
| +738% | +$714K |
|
2886
CALL
Chegg
CHGG
$108M
| $1.25M | ﹤0.01% |
164,500
+28,700
| +21% | +$263K |
|
2887
PUT
Exelixis
EXEL
$14.1B
| $1.25M | ﹤0.01% |
52,500
-39,700
| -43% | -$882K |
|
2888
Rocket Companies
RKT
$38B
| $1.25M | ﹤0.01% |
85,610
+53,410
| +166% | +$663K |
|
2889
Medpace
MEDP
$16.6B
| $1.24M | ﹤0.01% |
3,078
+2,558
| +492% | +$899K |
|
2890
PUT
Freedom Holding
FRHC
$9.77B
| $1.24M | ﹤0.01% |
17,600
-42,300
| -71% | -$3.3M |
|
2891
CALL
Danaos Corp
DAC
$2.53B
| $1.24M | ﹤0.01% |
17,200
-3,900
| -18% | -$288K |
|
2892
Axos Financial
AX
$5.48B
| $1.24M | ﹤0.01% |
22,891
-66,052
| -74% | -$3.48M |
|
2893
PUT
Oscar Health
OSCR
$8.79B
| $1.24M | ﹤0.01% |
83,200
+60,000
| +259% | +$822K |
|
|
IPG
2894
CALL
DELISTED
Interpublic Group of Companies
IPG
| $1.23M | ﹤0.01% |
37,800
+21,100
| +126% | +$683K |
|
2895
CALL
Qiagen
QGEN
$8.55B
| $1.23M | ﹤0.01% |
27,903
+27,620
| +9,760% | +$1.26M |
|
2896
GameStop
GME
$9.64B
| $1.23M | ﹤0.01% |
+98,379
| New | +$1.43M |
|
2897
Fiverr
FVRR
$406M
| $1.23M | ﹤0.01% |
+58,404
| New | +$1.46M |
|
2898
PUT
PagerDuty
PD
$753M
| $1.23M | ﹤0.01% |
54,200
+21,200
| +64% | +$503K |
|
2899
Tenet Healthcare
THC
$21.1B
| $1.23M | ﹤0.01% |
11,702
-2,966
| -20% | -$267K |
|
2900
CALL
Sempra
SRE
$60B
| $1.23M | ﹤0.01% |
17,100
-70,600
| -81% | -$5.06M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.