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 | |
|---|---|---|---|---|---|---|
6726
CALL
Voyager Therapeutics
VYGR
$181M
| $31K | ﹤0.01% |
3,400
+2,200
| +183% | +$18.6K |
|
6727
CALL
Workhorse Group
WKHS
$33.4M
| $31K | ﹤0.01% |
45
+27
| +150% | +$23.3K |
|
6728
ProShares Ultra Yen
YCL
$31.7M
| $31K | ﹤0.01% |
1,345
-2,142
| -61% | -$52.6K |
|
|
IBTX
6729
DELISTED
Independent Bank Group, Inc.
IBTX
| $31K | ﹤0.01% |
699
+489
| +233% | +$22.8K |
|
6730
PUT
Aegon
AEG
$13.3B
| $30K | ﹤0.01% |
5,100
-100
| -2% | -$582 |
|
6731
PUT
Amphastar Pharmaceuticals
AMPH
$907M
| $30K | ﹤0.01% |
700
-1,600
| -70% | -$82.6K |
|
6732
CALL
Algonquin Power & Utilities
AQN
$4.59B
| $30K | ﹤0.01% |
4,900
+1,500
| +44% | +$9.09K |
|
6733
CALL
Barings BDC
BBDC
$869M
| $30K | ﹤0.01% |
+3,300
| New | +$30.1K |
|
6734
ProShares Ultra NASDAQ Biotechnology
BIB
$82.9M
| $30K | ﹤0.01% |
522
-1,957
| -79% | -$113K |
|
|
BRDG
6735
DELISTED
Bridge Investment Group
BRDG
| $30K | ﹤0.01% |
4,402
-24,533
| -85% | -$204K |
|
6736
CALL
Babcock & Wilcox
BW
$1.18B
| $30K | ﹤0.01% |
26,800
+11,900
| +80% | +$14.7K |
|
6737
CALL
CareDx
CDNA
$1.83B
| $30K | ﹤0.01% |
2,900
+1,800
| +164% | +$18K |
|
6738
CALL
Certara
CERT
$1.26B
| $30K | ﹤0.01% |
1,700
+400
| +31% | +$6.9K |
|
6739
Pacer US Cash Cows 100 ETF
COWZ
$19B
| $30K | ﹤0.01% |
524
-3,041
| -85% | -$163K |
|
6740
PUT
Champions Oncology
CSBR
$75.9M
| $30K | ﹤0.01% |
+6,300
| New | +$36.9K |
|
6741
CALL
Dana Inc
DAN
$2.88B
| $30K | ﹤0.01% |
2,400
-10,400
| -81% | -$135K |
|
6742
Edgewell Personal Care
EPC
$1.3B
| $30K | ﹤0.01% |
+791
| New | +$29.9K |
|
6743
Essential Properties Realty Trust
EPRT
$6.92B
| $30K | ﹤0.01% |
+1,162
| New | +$29.1K |
|
6744
PUT
Fidelity Enhanced Large Cap Core ETF
FELC
$7.78B
| $30K | ﹤0.01% |
600
+300
| +100% | +$8.4K |
|
|
GB
6745
PUT
DELISTED
Global Blue Group Holding
GB
| $30K | ﹤0.01% |
5,900
-3,800
| -39% | -$17.7K |
|
|
HITI
6746
CALL
High Tide
HITI
$180M
| $30K | ﹤0.01% |
15,000
-4,900
| -25% | -$8.78K |
|
6747
iShares MSCI Saudi Arabia ETF
KSA
$612M
| $30K | ﹤0.01% |
681
+403
| +145% | +$17.6K |
|
6748
CALL
Mama's Creations
MAMA
$846M
| $30K | ﹤0.01% |
6,100
-1,800
| -23% | -$8.52K |
|
6749
PUT
MediaAlpha
MAX
$746M
| $30K | ﹤0.01% |
1,500
| – | – |
|
6750
CALL
Neonode
NEON
$12.6M
| $30K | ﹤0.01% |
21,600
+19,900
| +1,171% | +$33.2K |
|
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.