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 | |
|---|---|---|---|---|---|---|
|
SPRB
7026
Spruce Biosciences
SPRB
$114M
| $22K | ﹤0.01% |
+375
| New | +$95.4K |
|
|
CMRX
7027
DELISTED
Chimerix, Inc.
CMRX
| $22K | ﹤0.01% |
21,638
+10,259
| +90% | +$10.7K |
|
|
OMGA
7028
CALL
DELISTED
Omega Therapeutics, Inc. Common Stock
OMGA
| $22K | ﹤0.01% |
6,200
+3,200
| +107% | +$12.3K |
|
|
USAP
7029
CALL
DELISTED
Universal Stainless & Alloy
USAP
| $22K | ﹤0.01% |
1,000
+500
| +100% | +$10.1K |
|
|
VLD
7030
PUT
DELISTED
Velo3D, Inc.
VLD
| $22K | ﹤0.01% |
1,406
-288
| -17% | -$3.25K |
|
7031
CALL
Alarm.com
ALRM
$2.75B
| $21K | ﹤0.01% |
300
-7,900
| -96% | -$537K |
|
7032
Arena Group
AREN
$55.2M
| $21K | ﹤0.01% |
+18,368
| New | +$27.4K |
|
7033
PUT
Associated Banc-Corp
ASB
$5.8B
| $21K | ﹤0.01% |
1,000
-300
| -23% | -$6.27K |
|
|
BRFS
7034
PUT
DELISTED
BRF SA
BRFS
| $21K | ﹤0.01% |
6,600
| – | – |
|
7035
CALL
BioXcel Therapeutics
BTAI
$24.8M
| $21K | ﹤0.01% |
469
-4,462
| -90% | -$213K |
|
7036
Cadiz
CDZI
$251M
| $21K | ﹤0.01% |
+7,353
| New | +$20.2K |
|
|
CHCT
7037
PUT
Community Healthcare Trust
CHCT
$536M
| $21K | ﹤0.01% |
800
| – | – |
|
7038
Driven Brands
DRVN
$2.47B
| $21K | ﹤0.01% |
1,393
-10,082
| -88% | -$140K |
|
7039
Franklin FTSE Japan ETF
FLJP
$3.86B
| $21K | ﹤0.01% |
700
+303
| +76% | +$8.93K |
|
7040
First Industrial Realty Trust
FR
$8.66B
| $21K | ﹤0.01% |
410
-92
| -18% | -$4.86K |
|
7041
PUT
Green Dot
GDOT
$750M
| $21K | ﹤0.01% |
2,300
+2,100
| +1,050% | +$18.5K |
|
7042
PUT
Harvard Bioscience
HBIO
$27.6M
| $21K | ﹤0.01% |
+500
| New | +$22.5K |
|
7043
Hilton Grand Vacations
HGV
$4.04B
| $21K | ﹤0.01% |
458
+333
| +266% | +$14.6K |
|
7044
CALL
The Honest Company
HNST
$412M
| $21K | ﹤0.01% |
5,200
+4,200
| +420% | +$14.2K |
|
7045
CALL
Hexcel
HXL
$7.97B
| $21K | ﹤0.01% |
300
-3,700
| -93% | -$266K |
|
7046
Kilroy Realty
KRC
$4.59B
| $21K | ﹤0.01% |
+577
| New | +$21.3K |
|
7047
PUT
LanzaTech
LNZA
$59.9M
| $21K | ﹤0.01% |
69
+59
| +590% | +$21.9K |
|
7048
PUT
Marcus Corp
MCS
$767M
| $21K | ﹤0.01% |
+1,500
| New | +$21.2K |
|
7049
PUT
Methode Electronics
MEI
$458M
| $21K | ﹤0.01% |
1,800
-900
| -33% | -$17K |
|
7050
Northeast Community Bancorp
NECB
$373M
| $21K | ﹤0.01% |
+1,360
| New | +$22.1K |
|
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.