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 | |
|---|---|---|---|---|---|---|
6751
PUT
Pangaea Logistics
PANL
$484M
| $30K | ﹤0.01% |
4,400
+2,400
| +120% | +$19.7K |
|
6752
ProQR Therapeutics
PRQR
$244M
| $30K | ﹤0.01% |
13,550
+11,756
| +655% | +$25.1K |
|
6753
Radiant Logistics
RLGT
$400M
| $30K | ﹤0.01% |
5,688
+4,214
| +286% | +$25K |
|
6754
CALL
Relmada Therapeutics
RLMD
$540M
| $30K | ﹤0.01% |
6,500
+5,100
| +364% | +$24.6K |
|
6755
Seadrill
SDRL
$2.59B
| $30K | ﹤0.01% |
+616
| New | +$28K |
|
|
SNBR
6756
DELISTED
Sleep Number
SNBR
| $30K | ﹤0.01% |
1,909
-8,268
| -81% | -$107K |
|
6757
CALL
Spire
SR
$4.79B
| $30K | ﹤0.01% |
500
+200
| +67% | +$12K |
|
6758
CALL
Mammoth Energy Services
TUSK
$122M
| $30K | ﹤0.01% |
8,300
+5,800
| +232% | +$21.9K |
|
6759
PUT
Vanguard FTSE Developed Markets ETF
VEA
$223B
| $30K | ﹤0.01% |
600
-1,200
| -67% | -$58K |
|
6760
PUT
Verrica Pharmaceuticals
VRCA
$89M
| $30K | ﹤0.01% |
510
-370
| -42% | -$20.4K |
|
6761
PUT
Woodward
WWD
$23B
| $30K | ﹤0.01% |
200
-900
| -82% | -$127K |
|
|
SMC
6762
CALL
Summit Midstream
SMC
$420M
| $30K | ﹤0.01% |
1,100
-2,900
| -73% | -$54.2K |
|
|
GOL
6763
PUT
DELISTED
Gol Linhas Aéreas Inteligentes S.A. American Depositary Shares (Each representing Ten Preferred Shares)
GOL
| $30K | ﹤0.01% |
28,900
+2,000
| +7% | +$5.91K |
|
6764
CAE Inc. Common Shares
CAE
$8.44B
| $29K | ﹤0.01% |
1,432
-1,279
| -47% | -$25.7K |
|
6765
PUT
Compugen
CGEN
$212M
| $29K | ﹤0.01% |
11,300
+3,700
| +49% | +$8.62K |
|
6766
PUT
Camden Property Trust
CPT
$11.5B
| $29K | ﹤0.01% |
300
-100
| -25% | -$9.68K |
|
6767
PUT
Embecta
EMBC
$218M
| $29K | ﹤0.01% |
2,200
+1,200
| +120% | +$18.6K |
|
6768
Farmers National Banc Corp
FMNB
$945M
| $29K | ﹤0.01% |
+2,244
| New | +$30.3K |
|
6769
CALL
Funko
FNKO
$346M
| $29K | ﹤0.01% |
4,800
-9,200
| -66% | -$64.6K |
|
|
INZY
6770
CALL
DELISTED
Inozyme Pharma
INZY
| $29K | ﹤0.01% |
3,900
-4,700
| -55% | -$25.8K |
|
6771
MediaAlpha
MAX
$746M
| $29K | ﹤0.01% |
1,452
+198
| +16% | +$3.16K |
|
6772
CALL
MSC Industrial Direct
MSM
$6.76B
| $29K | ﹤0.01% |
300
-8,300
| -97% | -$814K |
|
6773
Novanta
NOVT
$4.91B
| $29K | ﹤0.01% |
+166
| New | +$27.2K |
|
|
PTN
6774
Palatin Technologies
PTN
$14.4M
| $29K | ﹤0.01% |
310
-80
| -21% | -$11.7K |
|
6775
CALL
Rimini Street
RMNI
$457M
| $29K | ﹤0.01% |
9,100
-15,100
| -62% | -$48.2K |
|
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.