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 | |
|---|---|---|---|---|---|---|
6201
PUT
Mercury Systems
MRCY
$5.83B
| $53K | ﹤0.01% |
1,800
+1,500
| +500% | +$45.2K |
|
6202
PUT
NN Inc
NNBR
$255M
| $53K | ﹤0.01% |
11,300
+10,700
| +1,783% | +$49.1K |
|
|
ONTF
6203
CALL
DELISTED
ON24
ONTF
| $53K | ﹤0.01% |
7,500
+1,700
| +29% | +$12.3K |
|
6204
Otter Tail
OTTR
$3.71B
| $53K | ﹤0.01% |
+623
| New | +$54.2K |
|
6205
PUT
STAG Industrial
STAG
$7.38B
| $53K | ﹤0.01% |
1,400
+700
| +100% | +$26.5K |
|
6206
Under Armour Class C
UA
$2.77B
| $53K | ﹤0.01% |
7,526
-172,123
| -96% | -$1.32M |
|
6207
CALL
Urban Edge Properties
UE
$2.86B
| $53K | ﹤0.01% |
3,100
+2,900
| +1,450% | +$50.2K |
|
|
VTNR
6208
PUT
DELISTED
Vertex Energy, Inc
VTNR
| $53K | ﹤0.01% |
38,200
-153,900
| -80% | -$246K |
|
|
MNTX
6209
PUT
DELISTED
Manitex International, Inc.
MNTX
| $53K | ﹤0.01% |
7,800
+100
| +1% | +$728 |
|
6210
PUT
ARKO Corp
ARKO
$896M
| $52K | ﹤0.01% |
+9,200
| New | +$67.1K |
|
6211
PUT
Arrow Financial
AROW
$659M
| $52K | ﹤0.01% |
2,100
| – | – |
|
6212
PUT
Breakwave Tanker Shipping ETF
BWET
$34.9M
| $52K | ﹤0.01% |
3,800
+700
| +23% | +$12.8K |
|
6213
PUT
Century Aluminum
CENX
$4.43B
| $52K | ﹤0.01% |
3,400
-230,500
| -99% | -$2.59M |
|
6214
Delcath Systems
DCTH
$422M
| $52K | ﹤0.01% |
10,937
-2,877
| -21% | -$12.4K |
|
6215
iShares US Oil Equipment & Services ETF
IEZ
$361M
| $52K | ﹤0.01% |
2,214
+1,378
| +165% | +$29.4K |
|
|
MVO
6216
PUT
DELISTED
MV Oil Trust
MVO
| $52K | ﹤0.01% |
4,900
+1,900
| +63% | +$21K |
|
6217
Tradr 1.25X NVDA Bear Daily ETF
NVDS
$16M
| $52K | ﹤0.01% |
273
+270
| +9,000% | +$75.7K |
|
6218
PUT
Ocugen
OCGN
$416M
| $52K | ﹤0.01% |
+32,300
| New | +$27.1K |
|
6219
Orion Group Holdings
ORN
$396M
| $52K | ﹤0.01% |
6,422
-11,000
| -63% | -$71.4K |
|
6220
CALL
Prosperity Bancshares
PB
$8.97B
| $52K | ﹤0.01% |
800
-500
| -38% | -$31.9K |
|
6221
CALL
Sonoco
SON
$5.57B
| $52K | ﹤0.01% |
900
+400
| +80% | +$22.8K |
|
6222
PUT
ARS Pharmaceuticals
SPRY
$509M
| $52K | ﹤0.01% |
5,100
-16,200
| -76% | -$121K |
|
|
STR
6223
DELISTED
Sitio Royalties
STR
| $52K | ﹤0.01% |
2,107
+1,493
| +243% | +$33.6K |
|
6224
PUT
Strategic Education
STRA
$1.85B
| $52K | ﹤0.01% |
500
| – | – |
|
6225
CALL
Willdan Group
WLDN
$1.04B
| $52K | ﹤0.01% |
1,800
| – | – |
|
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.