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 | |
|---|---|---|---|---|---|---|
6176
Nurix Therapeutics
NRIX
$2.45B
| $46K | ﹤0.01% |
2,206
-2,419
| -52% | -$37.7K |
|
6177
PUT
OceanFirst Financial
OCFC
$1.71B
| $46K | ﹤0.01% |
+2,900
| New | +$43.8K |
|
6178
CALL
Piper Sandler
PIPR
$5.15B
| $46K | ﹤0.01% |
800
-5,200
| -87% | -$266K |
|
6179
Prothena Corp
PRTA
$440M
| $46K | ﹤0.01% |
2,267
-4,951
| -69% | -$107K |
|
6180
ProShares Ultra S&P500
SSO
$7.76B
| $46K | ﹤0.01% |
+1,118
| New | +$43K |
|
|
TERN
6181
PUT
DELISTED
Terns Pharmaceuticals
TERN
| $46K | ﹤0.01% |
6,800
+1,600
| +31% | +$9.69K |
|
6182
CALL
Mammoth Energy Services
TUSK
$125M
| $46K | ﹤0.01% |
14,200
+5,900
| +71% | +$20.3K |
|
6183
PUT
West Fraser Timber
WFG
$4.99B
| $46K | ﹤0.01% |
600
+500
| +500% | +$39.7K |
|
|
ACCD
6184
CALL
DELISTED
Accolade Inc
ACCD
| $46K | ﹤0.01% |
13,000
+2,000
| +18% | +$15.2K |
|
|
CFB
6185
CALL
DELISTED
CrossFirst Bankshares, Inc. Common Stock
CFB
| $46K | ﹤0.01% |
3,300
-2,800
| -46% | -$36.2K |
|
|
LEV
6186
CALL
DELISTED
The Lion Electric Company
LEV
| $46K | ﹤0.01% |
50,900
-134,600
| -73% | -$143K |
|
|
HAYN
6187
PUT
DELISTED
Haynes International, Inc.
HAYN
| $46K | ﹤0.01% |
800
+600
| +300% | +$35.6K |
|
6188
PUT
Arbutus Biopharma
ABUS
$871M
| $45K | ﹤0.01% |
14,800
-50,300
| -77% | -$151K |
|
|
CRESY
6189
Cresud
CRESY
$823M
| $45K | ﹤0.01% |
5,582
-2,247
| -29% | -$20.5K |
|
6190
CALL
China Yuchai International
CYD
$1.81B
| $45K | ﹤0.01% |
+5,000
| New | +$42.4K |
|
|
EFXT
6191
Enerflex
EFXT
$2.69B
| $45K | ﹤0.01% |
8,366
+7,827
| +1,452% | +$42.5K |
|
6192
PUT
Greif
GEF
$4.96B
| $45K | ﹤0.01% |
800
-400
| -33% | -$25.3K |
|
6193
CALL
IDEAYA Biosciences
IDYA
$3.5B
| $45K | ﹤0.01% |
1,300
-700
| -35% | -$27.7K |
|
|
LADR
6194
CALL
Ladder Capital
LADR
$1.23B
| $45K | ﹤0.01% |
4,000
-10,300
| -72% | -$113K |
|
6195
CALL
Monro
MNRO
$421M
| $45K | ﹤0.01% |
1,900
-900
| -32% | -$24K |
|
|
ORIO
6196
CALL
Orion Digital Corp
ORIO
$15.2M
| $45K | ﹤0.01% |
+30,800
| New | +$53K |
|
|
NFGC
6197
CALL
New Found Gold
NFGC
$549M
| $45K | ﹤0.01% |
16,100
+2,100
| +15% | +$7.4K |
|
6198
Nkarta
NKTX
$154M
| $45K | ﹤0.01% |
+7,653
| New | +$54.2K |
|
6199
PUT
Saratoga Investment
SAR
$307M
| $45K | ﹤0.01% |
2,000
+1,100
| +122% | +$25.6K |
|
6200
abrdn Physical Gold Shares ETF
SGOL
$7.01B
| $45K | ﹤0.01% |
2,046
-7,519
| -79% | -$168K |
|
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.