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 | |
|---|---|---|---|---|---|---|
4826
Zevra Therapeutics
ZVRA
$570M
| $205K | ﹤0.01% |
35,466
+30,235
| +578% | +$186K |
|
4827
Compass Minerals
CMP
$1.25B
| $204K | ﹤0.01% |
+12,962
| New | +$272K |
|
4828
EVgo
EVGO
$236M
| $204K | ﹤0.01% |
+81,557
| New | +$212K |
|
4829
PUT
Harmony Gold Mining
HMY
$10.1B
| $204K | ﹤0.01% |
25,000
-4,700
| -16% | -$30K |
|
4830
CALL
Medallion Financial
MFIN
$233M
| $204K | ﹤0.01% |
25,900
-2,400
| -8% | -$21.6K |
|
4831
Praxis Precision Medicines
PRAX
$8.58B
| $204K | ﹤0.01% |
3,355
+1,963
| +141% | +$88.1K |
|
4832
PUT
Champion Homes
SKY
$4.41B
| $204K | ﹤0.01% |
2,400
+1,400
| +140% | +$108K |
|
|
SPTN
4833
CALL
DELISTED
SpartanNash
SPTN
| $204K | ﹤0.01% |
10,100
+9,400
| +1,343% | +$203K |
|
4834
PUT
Bitdeer Technologies
BTDR
$2.7B
| $203K | ﹤0.01% |
+29,000
| New | +$213K |
|
4835
PUT
Clean Energy Fuels
CLNE
$425M
| $203K | ﹤0.01% |
75,800
+56,800
| +299% | +$169K |
|
4836
PUT
Cogent Biosciences
COGT
$7.07B
| $203K | ﹤0.01% |
+30,300
| New | +$187K |
|
4837
Editas Medicine
EDIT
$413M
| $203K | ﹤0.01% |
+27,466
| New | +$228K |
|
4838
PUT
Genmab
GMAB
$17.6B
| $203K | ﹤0.01% |
6,800
+4,000
| +143% | +$118K |
|
|
GOGL
4839
DELISTED
Golden Ocean Group
GOGL
| $203K | ﹤0.01% |
15,716
-103,409
| -87% | -$1.19M |
|
4840
Mitsubishi UFJ Financial
MUFG
$254B
| $203K | ﹤0.01% |
19,862
+7,049
| +55% | +$68.2K |
|
4841
Enpro
NPO
$6.61B
| $203K | ﹤0.01% |
1,204
+32
| +3% | +$4.97K |
|
4842
CALL
Protolabs
PRLB
$1.79B
| $203K | ﹤0.01% |
5,700
-1,600
| -22% | -$57.8K |
|
4843
PUT
Revolution Medicines
RVMD
$40.9B
| $203K | ﹤0.01% |
6,300
-6,200
| -50% | -$184K |
|
4844
abrdn Physical Gold Shares ETF
SGOL
$7.01B
| $203K | ﹤0.01% |
9,565
-17,971
| -65% | -$356K |
|
4845
Shutterstock
SSTK
$198M
| $203K | ﹤0.01% |
4,441
-80
| -2% | -$3.81K |
|
4846
PUT
Tetra Tech
TTEK
$8.42B
| $203K | ﹤0.01% |
5,500
-11,500
| -68% | -$398K |
|
|
ABK
4847
PUT
DELISTED
Ambac Financial Group
ABK
| $203K | ﹤0.01% |
13,000
+5,500
| +73% | +$85.9K |
|
4848
CALL
Arcos Dorados Holdings
ARCO
$1.73B
| $202K | ﹤0.01% |
18,200
-3,100
| -15% | -$36.8K |
|
4849
BCE
BCE
$20.2B
| $202K | ﹤0.01% |
+5,966
| New | +$227K |
|
|
VISN
4850
CALL
Vistance Networks Inc
VISN
$2.64B
| $202K | ﹤0.01% |
154,900
+31,600
| +26% | +$62.3K |
|
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.