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 | |
|---|---|---|---|---|---|---|
5326
PUT
Zevra Therapeutics
ZVRA
$562M
| $128K | ﹤0.01% |
25,200
-133,600
| -84% | -$821K |
|
|
NPKI
5327
NPK International
NPKI
$1.06B
| $128K | ﹤0.01% |
17,794
-3,273
| -16% | -$21.4K |
|
|
SBDS
5328
DELISTED
Solo Brands Inc
SBDS
| $128K | ﹤0.01% |
1,483
+1,338
| +923% | +$154K |
|
5329
Arcos Dorados Holdings
ARCO
$1.72B
| $127K | ﹤0.01% |
11,498
-38,527
| -77% | -$457K |
|
|
BRAG
5330
Bragg Gaming Group
BRAG
$50.6M
| $127K | ﹤0.01% |
20,710
-21,509
| -51% | -$113K |
|
5331
PUT
Cabaletta Bio
CABA
$437M
| $127K | ﹤0.01% |
7,500
+2,600
| +53% | +$55.8K |
|
5332
CALL
Crescent Capital BDC
CCAP
$403M
| $127K | ﹤0.01% |
7,400
+2,600
| +54% | +$43.7K |
|
5333
CALL
Torrid Holdings
CURV
$254M
| $127K | ﹤0.01% |
26,200
-100
| -0.4% | -$493 |
|
5334
CALL
Curtiss-Wright
CW
$26.7B
| $127K | ﹤0.01% |
500
+400
| +400% | +$93K |
|
5335
PUT
Funko
FNKO
$326M
| $127K | ﹤0.01% |
20,400
-300
| -1% | -$2.11K |
|
5336
Grab
GRAB
$14.3B
| $127K | ﹤0.01% |
40,615
+14,269
| +54% | +$45.8K |
|
5337
CALL
Talkspace
TALK
$874M
| $127K | ﹤0.01% |
35,800
-60,600
| -63% | -$165K |
|
5338
CALL
Afya
AFYA
$1.31B
| $126K | ﹤0.01% |
6,800
+6,600
| +3,300% | +$135K |
|
5339
CALL
Alto Ingredients
ALTO
$369M
| $126K | ﹤0.01% |
58,200
-63,900
| -52% | -$135K |
|
5340
CALL
Artivion
AORT
$1.3B
| $126K | ﹤0.01% |
6,000
+5,900
| +5,900% | +$110K |
|
5341
Orthofix Medical
OFIX
$477M
| $126K | ﹤0.01% |
8,732
+8,012
| +1,113% | +$111K |
|
5342
CALL
OneWater Marine
ONEW
$204M
| $126K | ﹤0.01% |
+4,500
| New | +$121K |
|
5343
Spire Global
SPIR
$444M
| $126K | ﹤0.01% |
10,500
+4,896
| +87% | +$48.6K |
|
|
SUPV
5344
CALL
Grupo Supervielle
SUPV
$828M
| $126K | ﹤0.01% |
22,200
+8,900
| +67% | +$39.3K |
|
5345
PUT
Veritone
VERI
$101M
| $126K | ﹤0.01% |
24,000
+13,600
| +131% | +$32.1K |
|
|
APLT
5346
PUT
DELISTED
Applied Therapeutics
APLT
| $125K | ﹤0.01% |
18,500
+17,300
| +1,442% | +$77.7K |
|
5347
CALL
Fulgent Genetics
FLGT
$470M
| $125K | ﹤0.01% |
5,800
-300
| -5% | -$7.45K |
|
5348
CALL
KRONOS Worldwide
KRO
$693M
| $125K | ﹤0.01% |
10,600
+9,300
| +715% | +$90.1K |
|
5349
PUT
Mitsubishi UFJ Financial
MUFG
$253B
| $125K | ﹤0.01% |
+12,300
| New | +$119K |
|
5350
PUT
Nu Skin
NUS
$252M
| $125K | ﹤0.01% |
9,100
-3,100
| -25% | -$48.4K |
|
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.