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 | |
|---|---|---|---|---|---|---|
|
OLO
6176
PUT
DELISTED
Olo Inc
OLO
| $55K | ﹤0.01% |
+10,100
| New | +$55.1K |
|
6177
CALL
Pacira BioSciences
PCRX
$1.04B
| $55K | ﹤0.01% |
1,900
-42,500
| -96% | -$1.31M |
|
|
SCPH
6178
PUT
DELISTED
scPharmaceuticals
SCPH
| $55K | ﹤0.01% |
11,000
+4,900
| +80% | +$27.4K |
|
6179
CALL
Skywest
SKYW
$4.24B
| $55K | ﹤0.01% |
800
-21,500
| -96% | -$1.27M |
|
6180
CALL
SLR Investment Corp
SLRC
$686M
| $55K | ﹤0.01% |
3,600
-100
| -3% | -$1.51K |
|
6181
PUT
American Financial Group
AFG
$11.8B
| $54K | ﹤0.01% |
400
-200
| -33% | -$24.9K |
|
|
ALE
6182
DELISTED
Allete
ALE
| $54K | ﹤0.01% |
908
+186
| +26% | +$10.9K |
|
6183
Banco de Chile
BCH
$20.9B
| $54K | ﹤0.01% |
+2,438
| New | +$54.9K |
|
6184
CALL
Clean Energy Fuels
CLNE
$427M
| $54K | ﹤0.01% |
20,300
-12,400
| -38% | -$37K |
|
|
CVAC
6185
PUT
DELISTED
CureVac
CVAC
| $54K | ﹤0.01% |
17,900
-600
| -3% | -$2.11K |
|
6186
CALL
First American
FAF
$7.66B
| $54K | ﹤0.01% |
+900
| New | +$53.2K |
|
6187
PUT
Seres Therapeutics
MCRB
$46.8M
| $54K | ﹤0.01% |
3,550
+3,220
| +976% | +$69.4K |
|
6188
CALL
Bank of N.T. Butterfield & Son
NTB
$2.43B
| $54K | ﹤0.01% |
1,700
-8,200
| -83% | -$249K |
|
6189
SiTime
SITM
$16B
| $54K | ﹤0.01% |
588
+333
| +131% | +$35K |
|
6190
Veritone
VERI
$101M
| $54K | ﹤0.01% |
+10,454
| New | +$24.7K |
|
|
DNMR
6191
PUT
DELISTED
Danimer Scientific, Inc.
DNMR
| $54K | ﹤0.01% |
1,240
-135
| -10% | -$5.59K |
|
|
AHT
6192
PUT
Ashford Hospitality Trust
AHT
$20.9M
| $53K | ﹤0.01% |
3,910
-2,470
| -39% | -$38.1K |
|
|
AIV
6193
CALL
Aimco
AIV
$387M
| $53K | ﹤0.01% |
6,500
+1,100
| +20% | +$8.4K |
|
6194
American Vanguard Corp
AVD
$68.4M
| $53K | ﹤0.01% |
4,109
+13
| +0.3% | +$143 |
|
6195
CALL
BlackSky Technology
BKSY
$943M
| $53K | ﹤0.01% |
4,913
-3,037
| -38% | -$33.3K |
|
|
BPT
6196
PUT
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
| $53K | ﹤0.01% |
21,900
-2,600
| -11% | -$6.53K |
|
6197
Forum Energy Technologies
FET
$708M
| $53K | ﹤0.01% |
2,692
-1,142
| -30% | -$22.5K |
|
|
XRN
6198
PUT
Chiron Real Estate Inc
XRN
$514M
| $53K | ﹤0.01% |
1,220
-400
| -25% | -$19.2K |
|
6199
The Honest Company
HNST
$402M
| $53K | ﹤0.01% |
13,235
-90,653
| -87% | -$306K |
|
6200
CALL
Integra LifeSciences
IART
$1.29B
| $53K | ﹤0.01% |
1,500
-2,400
| -62% | -$96K |
|
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.