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 | |
|---|---|---|---|---|---|---|
5601
eBay
EBAY
$50.6B
| $80K | ﹤0.01% |
+1,493
| New | +$77.8K |
|
|
ETNB
5602
PUT
DELISTED
89bio
ETNB
| $80K | ﹤0.01% |
10,000
-36,300
| -78% | -$324K |
|
5603
PUT
Lifestance Health
LFST
$4B
| $80K | ﹤0.01% |
16,400
-89,900
| -85% | -$542K |
|
5604
PUT
Outset Medical
OM
$84.7M
| $80K | ﹤0.01% |
1,400
+153
| +12% | +$7.5K |
|
|
RVPH
5605
CALL
DELISTED
REVIVA PHARMA HLDGS INC
RVPH
| $80K | ﹤0.01% |
3,160
-715
| -18% | -$32.5K |
|
5606
SGHC Ltd
SGHC
$7.11B
| $80K | ﹤0.01% |
25,034
+19,589
| +360% | +$66.1K |
|
5607
United States Gasoline Fund
UGA
$142M
| $80K | ﹤0.01% |
+1,184
| New | +$80.8K |
|
5608
PUT
American States Water
AWR
$3.36B
| $79K | ﹤0.01% |
1,100
| – | – |
|
5609
CALL
BioLife Solutions
BLFS
$1.53B
| $79K | ﹤0.01% |
3,700
-100
| -3% | -$1.94K |
|
5610
HF Sinclair
DINO
$16.5B
| $79K | ﹤0.01% |
+1,492
| New | +$83.9K |
|
|
DVAX
5611
DELISTED
Dynavax Technologies
DVAX
| $79K | ﹤0.01% |
7,042
-62,949
| -90% | -$733K |
|
5612
CALL
F&G Annuities & Life
FG
$3.79B
| $79K | ﹤0.01% |
2,100
+1,300
| +163% | +$50.9K |
|
5613
PUT
Heron Therapeutics
HRTX
$93.9M
| $79K | ﹤0.01% |
22,700
-13,600
| -37% | -$41.8K |
|
|
IAS
5614
CALL
DELISTED
Integral Ad Science
IAS
| $79K | ﹤0.01% |
8,200
+6,100
| +290% | +$58.4K |
|
5615
iShares US Oil Equipment & Services ETF
IEZ
$361M
| $79K | ﹤0.01% |
3,567
+1,353
| +61% | +$30.6K |
|
|
IRS
5616
PUT
IRSA Inversiones y Representaciones
IRS
$1.29B
| $79K | ﹤0.01% |
10,257
+104
| +1% | +$1K |
|
5617
CALL
InvenTrust Properties
IVT
$2.76B
| $79K | ﹤0.01% |
3,200
-3,500
| -52% | -$86.6K |
|
5618
CALL
MasterCraft Boat Holdings
MCFT
$579M
| $79K | ﹤0.01% |
4,200
+1,300
| +45% | +$27K |
|
5619
PUT
Sonos
SONO
$1.73B
| $79K | ﹤0.01% |
5,400
+700
| +15% | +$11.6K |
|
|
TGB
5620
PUT
Trekor Metals
TGB
$2.48B
| $79K | ﹤0.01% |
+32,300
| New | +$81.9K |
|
|
BELFB
5621
CALL
Bel Fuse Inc Class B
BELFB
$3.87B
| $78K | ﹤0.01% |
1,200
| – | – |
|
5622
PUT
Coastal Financial
CCB
$625M
| $78K | ﹤0.01% |
+1,700
| New | +$71.5K |
|
5623
Crown Holdings
CCK
$12.8B
| $78K | ﹤0.01% |
+1,058
| New | +$85.3K |
|
5624
CALL
CION Investment
CION
$297M
| $78K | ﹤0.01% |
6,500
-800
| -11% | -$9.45K |
|
5625
Corbus Pharmaceuticals
CRBP
$166M
| $78K | ﹤0.01% |
1,727
-263
| -13% | -$11.1K |
|
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.