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 | |
|---|---|---|---|---|---|---|
1026
PUT
Coherent
COHR
$55.5B
| $11.8M | 0.01% |
194,700
+21,200
| +12% | +$1.16M |
|
1027
CALL
Zoetis
ZTS
$31.4B
| $11.8M | 0.01% |
69,600
+300
| +0.4% | +$56.2K |
|
1028
PUT
MGM Resorts International
MGM
$11.7B
| $11.8M | 0.01% |
249,400
-694,300
| -74% | -$30.4M |
|
1029
CVS Health
CVS
$138B
| $11.7M | 0.01% |
147,237
-27,074
| -16% | -$2.07M |
|
1030
CALL
Fox Class B
FOX
$20.9B
| $11.7M | 0.01% |
373,900
+220,300
| +143% | +$6.16M |
|
1031
Invesco QQQ Trust
QQQ
$455B
| $11.7M | 0.01% |
26,321
+24,953
| +1,824% | +$10.7M |
|
1032
PUT
Travelers Companies
TRV
$80.6B
| $11.7M | 0.01% |
50,700
-31,700
| -38% | -$6.77M |
|
1033
PUT
Icon
ICLR
$13B
| $11.7M | 0.01% |
34,700
+31,700
| +1,057% | +$9.35M |
|
1034
CALL
TKO Group
TKO
$13.5B
| $11.7M | 0.01% |
134,900
+30,100
| +29% | +$2.51M |
|
1035
State Street SPDR S&P Regional Banking ETF
KRE
$4.84B
| $11.6M | 0.01% |
+231,474
| New | +$11.4M |
|
1036
PUT
O'Reilly Automotive
ORLY
$71.9B
| $11.6M | 0.01% |
154,500
-60,000
| -28% | -$4.2M |
|
1037
CALL
BioNTech
BNTX
$22.6B
| $11.6M | 0.01% |
125,700
-145,300
| -54% | -$13.9M |
|
1038
CALL
Reddit
RDDT
$32.1B
| $11.5M | 0.01% |
+233,900
| New | +$12.8M |
|
1039
PUT
AES
AES
$10.6B
| $11.5M | 0.01% |
642,200
+119,500
| +23% | +$2M |
|
1040
Datadog
DDOG
$86B
| $11.5M | 0.01% |
+93,023
| New | +$11.7M |
|
1041
PUT
Kohl's
KSS
$2.09B
| $11.5M | 0.01% |
394,300
+22,300
| +6% | +$598K |
|
1042
PUT
Oneok
OKE
$60.3B
| $11.5M | 0.01% |
143,300
-5,300
| -4% | -$387K |
|
1043
PUT
Alpha Metallurgical Resources
AMR
$1.75B
| $11.5M | 0.01% |
34,600
-16,700
| -33% | -$6.12M |
|
1044
United Airlines
UAL
$38B
| $11.4M | 0.01% |
238,467
-15,704
| -6% | -$673K |
|
1045
PUT
Universal Display
OLED
$3.7B
| $11.4M | 0.01% |
67,700
+43,200
| +176% | +$7.52M |
|
|
WCC
1046
PUT
WESCO International
WCC
$15.9B
| $11.4M | 0.01% |
66,500
-27,000
| -29% | -$4.46M |
|
|
1047
PUT
BioNTech
BNTX
$22.6B
| $11.4M | 0.01% |
123,300
+24,200
| +24% | +$2.32M |
|
1048
PUT
PVH
PVH
$3.65B
| $11.3M | 0.01% |
80,600
-61,600
| -43% | -$7.88M |
|
1049
PUT
Norfolk Southern
NSC
$78.6B
| $11.3M | 0.01% |
44,400
-32,800
| -42% | -$8.12M |
|
1050
PUT
Inspire Medical Systems
INSP
$1.47B
| $11.3M | 0.01% |
52,600
+28,000
| +114% | +$5.49M |
|
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.