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 | |
|---|---|---|---|---|---|---|
2876
CALL
Blue Bird Corp
BLBD
$2.37B
| $1.03M | ﹤0.01% |
19,200
+11,200
| +140% | +$516K |
|
|
TPH
2877
CALL
DELISTED
Tri Pointe Homes
TPH
| $1.03M | ﹤0.01% |
27,700
-21,400
| -44% | -$806K |
|
2878
CALL
Biohaven
BHVN
$2.17B
| $1.03M | ﹤0.01% |
29,700
+10,000
| +51% | +$395K |
|
2879
CALL
Credit Acceptance
CACC
$5.92B
| $1.03M | ﹤0.01% |
2,000
-1,200
| -38% | -$611K |
|
2880
PUT
Axalta
AXTA
$7.27B
| $1.03M | ﹤0.01% |
30,100
+28,900
| +2,408% | +$988K |
|
|
GPGI
2881
PUT
GPGI Inc
GPGI
$4.16B
| $1.03M | ﹤0.01% |
+181,804
| New | +$1M |
|
2882
PUT
Twist Bioscience
TWST
$5.39B
| $1.02M | ﹤0.01% |
20,800
+2,400
| +13% | +$97.9K |
|
|
QLTB
2883
CALL
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $1.02M | ﹤0.01% |
8,300
-37,300
| -82% | -$4.61M |
|
2884
Blackstone
BX
$106B
| $1.02M | ﹤0.01% |
+8,277
| New | +$1.02M |
|
|
SAGE
2885
CALL
DELISTED
Sage Therapeutics
SAGE
| $1.02M | ﹤0.01% |
94,300
+35,500
| +60% | +$455K |
|
2886
PUT
Sociedad Química y Minera de Chile
SQM
$19.5B
| $1.02M | ﹤0.01% |
25,100
-7,500
| -23% | -$347K |
|
2887
PUT
Willis Towers Watson
WTW
$28.5B
| $1.02M | ﹤0.01% |
3,900
-900
| -19% | -$232K |
|
2888
CALL
United Parks & Resorts
PRKS
$2.11B
| $1.02M | ﹤0.01% |
18,800
+6,100
| +48% | +$319K |
|
2889
PUT
Aaon
AAON
$8.25B
| $1.02M | ﹤0.01% |
11,700
+10,900
| +1,363% | +$889K |
|
2890
PUT
Aurinia Pharmaceuticals
AUPH
$2B
| $1.02M | ﹤0.01% |
178,700
-29,900
| -14% | -$157K |
|
|
NXRT
2891
CALL
NexPoint Residential Trust
NXRT
$680M
| $1.02M | ﹤0.01% |
25,800
+25,400
| +6,350% | +$892K |
|
2892
CALL
Copa Holdings
CPA
$5.62B
| $1.02M | ﹤0.01% |
10,700
+5,100
| +91% | +$509K |
|
2893
CALL
Sally Beauty Holdings
SBH
$1.43B
| $1.02M | ﹤0.01% |
94,700
-18,900
| -17% | -$208K |
|
2894
CALL
Solventum
SOLV
$14B
| $1.01M | ﹤0.01% |
+19,200
| New | +$1.17M |
|
2895
PUT
Amylyx Pharmaceuticals
AMLX
$2.11B
| $1.01M | ﹤0.01% |
533,800
-289,000
| -35% | -$560K |
|
2896
First Majestic Silver
AG
$7.97B
| $1.01M | ﹤0.01% |
170,858
+77,827
| +84% | +$539K |
|
2897
CALL
Gaotu Techedu
GOTU
$374M
| $1.01M | ﹤0.01% |
206,400
-230,400
| -53% | -$1.45M |
|
2898
BWX Technologies
BWXT
$16.1B
| $1.01M | ﹤0.01% |
+10,642
| New | +$987K |
|
2899
PUT
Ascendis Pharma A/S
ASND
$16.7B
| $1.01M | ﹤0.01% |
7,400
+6,800
| +1,133% | +$925K |
|
2900
Nextpower Inc
NXT
$15.2B
| $1.01M | ﹤0.01% |
21,489
-36,626
| -63% | -$1.82M |
|
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.