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 | |
|---|---|---|---|---|---|---|
2051
InMode
INMD
$872M
| $2.93M | ﹤0.01% |
135,423
+98,183
| +264% | +$2.2M |
|
2052
CALL
BWX Technologies
BWXT
$16B
| $2.92M | ﹤0.01% |
28,500
+13,400
| +89% | +$1.2M |
|
2053
CALL
Tandem Diabetes Care
TNDM
$1.17B
| $2.92M | ﹤0.01% |
82,600
+13,200
| +19% | +$354K |
|
2054
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
$351M
| $2.92M | ﹤0.01% |
87,547
-8,899
| -9% | -$245K |
|
2055
PUT
UGI
UGI
$8B
| $2.92M | ﹤0.01% |
118,900
-74,100
| -38% | -$1.78M |
|
2056
PUT
Murphy Oil
MUR
$5.58B
| $2.92M | ﹤0.01% |
63,800
-6,300
| -9% | -$254K |
|
2057
CALL
Nano X Imaging
NNOX
$62.4M
| $2.91M | ﹤0.01% |
298,300
-161,600
| -35% | -$1.29M |
|
2058
CALL
Sprout Social
SPT
$455M
| $2.91M | ﹤0.01% |
48,800
-900
| -2% | -$54.7K |
|
2059
PUT
Modine Manufacturing
MOD
$12.8B
| $2.91M | ﹤0.01% |
30,600
+11,200
| +58% | +$866K |
|
|
SGI
2060
PUT
Somnigroup International
SGI
$15.1B
| $2.91M | ﹤0.01% |
51,200
-47,400
| -48% | -$2.47M |
|
2061
KeyCorp
KEY
$24.3B
| $2.9M | ﹤0.01% |
183,425
-44,597
| -20% | -$644K |
|
2062
CALL
Rocket Lab Corp
RKLB
$39.9B
| $2.89M | ﹤0.01% |
704,300
+510,900
| +264% | +$2.36M |
|
2063
CALL
Liberty Global Class C
LBTYK
$3.27B
| $2.89M | ﹤0.01% |
171,000
+13,400
| +9% | +$258K |
|
|
DVAX
2064
PUT
DELISTED
Dynavax Technologies
DVAX
| $2.89M | ﹤0.01% |
233,100
+197,700
| +558% | +$2.58M |
|
2065
Atlassian
TEAM
$22B
| $2.89M | ﹤0.01% |
+14,810
| New | +$3.23M |
|
2066
TG Therapeutics
TGTX
$8.58B
| $2.89M | ﹤0.01% |
189,849
-27,872
| -13% | -$444K |
|
2067
CALL
Albertsons Companies
ACI
$5.4B
| $2.88M | ﹤0.01% |
134,500
+9,500
| +8% | +$204K |
|
2068
Burlington
BURL
$22B
| $2.88M | ﹤0.01% |
12,394
+10,853
| +704% | +$2.21M |
|
2069
S&P Global
SPGI
$126B
| $2.88M | ﹤0.01% |
+6,763
| New | +$2.93M |
|
2070
PUT
Webster Financial
WBS
$12.3B
| $2.86M | ﹤0.01% |
56,400
+52,500
| +1,346% | +$2.57M |
|
2071
PUT
Exelon
EXC
$48.6B
| $2.86M | ﹤0.01% |
76,200
-1,400
| -2% | -$50K |
|
2072
CALL
Gaotu Techedu
GOTU
$372M
| $2.86M | ﹤0.01% |
436,800
+233,500
| +115% | +$1.24M |
|
|
VTLE
2073
CALL
DELISTED
Vital Energy
VTLE
| $2.85M | ﹤0.01% |
54,300
+8,900
| +20% | +$413K |
|
2074
CALL
Evolv Technologies
EVLV
$943M
| $2.85M | ﹤0.01% |
639,400
+119,600
| +23% | +$517K |
|
2075
Cipher Digital
CIFR
$9.47B
| $2.84M | ﹤0.01% |
552,391
+399,184
| +261% | +$1.38M |
|
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.