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 | |
|---|---|---|---|---|---|---|
2726
CALL
EverQuote
EVER
$886M
| $1.46M | ﹤0.01% |
78,400
+77,500
| +8,611% | +$1.14M |
|
2727
CALL
Kanzhun
BZ
$6.89B
| $1.45M | ﹤0.01% |
83,000
+54,000
| +186% | +$851K |
|
2728
Evolv Technologies
EVLV
$943M
| $1.45M | ﹤0.01% |
+326,925
| New | +$1.41M |
|
2729
CALL
NuScale Power
SMR
$2.8B
| $1.45M | ﹤0.01% |
273,900
+148,500
| +118% | +$533K |
|
|
JPGE
2730
PUT
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $1.45M | ﹤0.01% |
25,200
-50,000
| -66% | -$2.88M |
|
2731
CALL
Magnite
MGNI
$2.65B
| $1.45M | ﹤0.01% |
135,200
-156,500
| -54% | -$1.56M |
|
2732
Spotify
SPOT
$99.2B
| $1.45M | ﹤0.01% |
5,497
-48,055
| -90% | -$11.3M |
|
2733
PUT
Morningstar
MORN
$6.56B
| $1.45M | ﹤0.01% |
4,700
+4,600
| +4,600% | +$1.33M |
|
2734
CALL
National Healthcare
NHC
$3.53B
| $1.45M | ﹤0.01% |
+15,300
| New | +$1.45M |
|
2735
PUT
Zai Lab
ZLAB
$2.17B
| $1.45M | ﹤0.01% |
90,300
+63,100
| +232% | +$1.33M |
|
2736
PUT
Doximity
DOCS
$3.67B
| $1.45M | ﹤0.01% |
53,700
+3,500
| +7% | +$99.8K |
|
2737
PUT
Sterling Infrastructure
STRL
$20.3B
| $1.45M | ﹤0.01% |
13,100
+10,300
| +368% | +$935K |
|
2738
Asana
ASAN
$1.58B
| $1.44M | ﹤0.01% |
93,227
-6,562
| -7% | -$117K |
|
2739
PUT
IDT Corp
IDT
$1.6B
| $1.44M | ﹤0.01% |
38,200
+24,700
| +183% | +$882K |
|
2740
ICL Group
ICL
$6.81B
| $1.44M | ﹤0.01% |
267,992
+267,928
| +418,638% | +$1.32M |
|
|
PPLC
2741
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $1.44M | ﹤0.01% |
16,000
-19,200
| -55% | -$1.73M |
|
2742
Sportradar
SRAD
$4.23B
| $1.44M | ﹤0.01% |
123,641
+70,273
| +132% | +$741K |
|
2743
CALL
McEwen Inc
MUX
$1.03B
| $1.44M | ﹤0.01% |
145,900
+75,300
| +107% | +$544K |
|
2744
PUT
American Coastal Insurance
ACIC
$498M
| $1.44M | ﹤0.01% |
134,500
+111,900
| +495% | +$1.27M |
|
2745
PUT
Howmet Aerospace
HWM
$116B
| $1.44M | ﹤0.01% |
21,000
+900
| +4% | +$55.2K |
|
2746
Liberty Global Class A
LBTYA
$3.31B
| $1.44M | ﹤0.01% |
84,854
-346
| -0.4% | -$6.31K |
|
2747
ProShares Ultra Silver
AGQ
$1.16B
| $1.43M | ﹤0.01% |
49,896
+27,352
| +121% | +$704K |
|
|
LOGC
2748
PUT
DELISTED
ContextLogic
LOGC
| $1.43M | ﹤0.01% |
251,900
+8,900
| +4% | +$49K |
|
2749
CALL
Kyndryl
KD
$2.66B
| $1.43M | ﹤0.01% |
65,800
-56,400
| -46% | -$1.2M |
|
2750
PUT
Frontline
FRO
$8.75B
| $1.43M | ﹤0.01% |
61,200
-115,300
| -65% | -$2.6M |
|
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.