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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3901
BuzzFeed
BZFD
$104M
| $395K | ﹤0.01% |
143,407
+141,739
| +8,498% | +$299K |
|
|
LAC
3902
CALL
Lithium Americas
LAC
$972M
| $395K | ﹤0.01% |
157,500
-119,000
| -43% | -$526K |
|
3903
PUT
Onto Innovation
ONTO
$12B
| $395K | ﹤0.01% |
1,800
-100
| -5% | -$20.7K |
|
|
FIRY
3904
PUT
Firy Inc
FIRY
$154M
| $395K | ﹤0.01% |
55,100
-13,800
| -20% | -$89.8K |
|
3905
CALL
SPS Commerce
SPSC
$2.51B
| $395K | ﹤0.01% |
2,100
-17,400
| -89% | -$3.18M |
|
3906
PUT
LendingTree
TREE
$572M
| $395K | ﹤0.01% |
9,500
+4,800
| +102% | +$203K |
|
|
TE
3907
CALL
T1 Energy
TE
$1.16B
| $395K | ﹤0.01% |
232,700
+21,800
| +10% | +$41.6K |
|
3908
CALL
Anavex Life Sciences
AVXL
$238M
| $394K | ﹤0.01% |
93,400
-53,200
| -36% | -$215K |
|
3909
PUT
Northern Oil and Gas
NOG
$2.16B
| $394K | ﹤0.01% |
10,600
-23,000
| -68% | -$922K |
|
3910
Direxion Daily NVDA Bull 2X ETF
NVDU
$532M
| $394K | ﹤0.01% |
3,546
-14,202
| -80% | -$1.14M |
|
3911
PUT
Newell Brands
NWL
$2.24B
| $394K | ﹤0.01% |
61,500
-1,100
| -2% | -$8.19K |
|
3912
BRC Group Holdings
RILY
$270M
| $394K | ﹤0.01% |
22,357
-63,185
| -74% | -$1.63M |
|
|
KLG
3913
CALL
DELISTED
WK Kellogg Co
KLG
| $393K | ﹤0.01% |
23,900
+15,500
| +185% | +$315K |
|
3914
NuScale Power
SMR
$2.84B
| $393K | ﹤0.01% |
33,653
-37,080
| -52% | -$264K |
|
3915
Global X Robotics & Artificial Intelligence ETF
BOTZ
$3.17B
| $392K | ﹤0.01% |
12,737
+9,584
| +304% | +$295K |
|
3916
PUT
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$276M
| $392K | ﹤0.01% |
6,200
-10,500
| -63% | -$634K |
|
3917
Western Midstream Partners
WES
$19.4B
| $392K | ﹤0.01% |
+9,881
| New | +$364K |
|
3918
CALL
Capital Southwest
CSWC
$1.48B
| $391K | ﹤0.01% |
15,000
+7,700
| +105% | +$198K |
|
3919
Krispy Kreme
DNUT
$564M
| $391K | ﹤0.01% |
36,351
-95,571
| -72% | -$1.19M |
|
3920
CALL
Dentsply Sirona
XRAY
$2.7B
| $391K | ﹤0.01% |
15,700
+15,200
| +3,040% | +$436K |
|
|
UROY
3921
CALL
Uranium Royalty Corp
UROY
$408M
| $390K | ﹤0.01% |
173,400
+88,500
| +104% | +$220K |
|
|
AD
3922
PUT
Array Digital Infrastructure
AD
$3.03B
| $390K | ﹤0.01% |
7,000
+900
| +15% | +$39.6K |
|
|
LICY
3923
CALL
DELISTED
Li-Cycle Holdings Corp.
LICY
| $390K | ﹤0.01% |
59,800
+43,062
| +257% | +$238K |
|
3924
CALL
United States Copper Index Fund
CPER
$742M
| $389K | ﹤0.01% |
14,300
+6,800
| +91% | +$191K |
|
|
OLK
3925
CALL
DELISTED
Olink Holding AB (publ) American Depositary Shares
OLK
| $389K | ﹤0.01% |
15,300
| – | – |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.