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 | |
|---|---|---|---|---|---|---|
|
CCEC
5751
CALL
Capital Clean Energy Carriers
CCEC
$1.34B
| $85K | ﹤0.01% |
+4,900
| New | +$86.2K |
|
5752
CALL
Blend Labs
BLND
$431M
| $84K | ﹤0.01% |
26,100
-15,800
| -38% | -$42.6K |
|
5753
Dine Brands
DIN
$456M
| $84K | ﹤0.01% |
+1,826
| New | +$84.8K |
|
5754
PUT
Diodes
DIOD
$3.78B
| $84K | ﹤0.01% |
1,200
+400
| +50% | +$27.8K |
|
5755
Karyopharm Therapeutics
KPTI
$43.5M
| $84K | ﹤0.01% |
3,732
+2,332
| +167% | +$40.9K |
|
5756
Orion
OEC
$381M
| $84K | ﹤0.01% |
3,613
+1,221
| +51% | +$28.2K |
|
5757
OneSpaWorld
OSW
$2.61B
| $84K | ﹤0.01% |
6,357
+5,168
| +435% | +$69.9K |
|
5758
PUT
Prudential
PUK
$37.6B
| $84K | ﹤0.01% |
4,400
+400
| +10% | +$8.26K |
|
5759
PUT
Spok Holdings
SPOK
$228M
| $84K | ﹤0.01% |
5,300
+700
| +15% | +$11.5K |
|
5760
PUT
Tempest Therapeutics
TPST
$13.7M
| $84K | ﹤0.01% |
1,662
+277
| +20% | +$14K |
|
|
CFB
5761
CALL
DELISTED
CrossFirst Bankshares, Inc. Common Stock
CFB
| $84K | ﹤0.01% |
6,100
+5,900
| +2,950% | +$78.9K |
|
|
AXNX
5762
DELISTED
Axonics, Inc. Common Stock
AXNX
| $84K | ﹤0.01% |
1,232
+211
| +21% | +$14.2K |
|
5763
CALL
Associated Banc-Corp
ASB
$5.83B
| $83K | ﹤0.01% |
3,900
+2,500
| +179% | +$52.2K |
|
5764
CALL
Cadre Holdings
CDRE
$1.32B
| $83K | ﹤0.01% |
2,300
+2,000
| +667% | +$69.7K |
|
5765
PUT
Hubbell
HUBB
$25B
| $83K | ﹤0.01% |
200
-300
| -60% | -$109K |
|
|
JBGS
5766
PUT
JBG SMITH
JBGS
$818M
| $83K | ﹤0.01% |
5,200
-800
| -13% | -$13.3K |
|
|
KNDI
5767
PUT
Kandi Technologies Group
KNDI
$67.5M
| $83K | ﹤0.01% |
39,300
+38,000
| +2,923% | +$97.4K |
|
|
MZTI
5768
PUT
The Marzetti Company
MZTI
$2.93B
| $83K | ﹤0.01% |
+400
| New | +$76.1K |
|
5769
CALL
Global X MSCI Norway ETF
NORW
$88M
| $83K | ﹤0.01% |
1,900
-2,000
| -51% | -$48.6K |
|
|
OGI
5770
Organigram Holdings
OGI
$132M
| $83K | ﹤0.01% |
39,051
-86,849
| -69% | -$168K |
|
5771
PUT
Patrick Industries
PATK
$2.74B
| $83K | ﹤0.01% |
1,050
+900
| +600% | +$64.6K |
|
5772
CALL
Protagonist Therapeutics
PTGX
$8.79B
| $83K | ﹤0.01% |
2,900
-1,500
| -34% | -$40.8K |
|
5773
PUT
Red Rock Resorts
RRR
$3.77B
| $83K | ﹤0.01% |
1,400
-7,400
| -84% | -$410K |
|
5774
State Street SPDR S&P Dividend ETF
SDY
$21.7B
| $83K | ﹤0.01% |
634
+218
| +52% | +$27.3K |
|
|
EFUT
5775
DELISTED
VanEck Ethereum Strategy ETF
EFUT
| $83K | ﹤0.01% |
2,958
+1,452
| +96% | +$35.5K |
|
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.