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 | |
|---|---|---|---|---|---|---|
6701
Galectin Therapeutics
GALT
$230M
| $25K | ﹤0.01% |
11,354
+3,477
| +44% | +$10.6K |
|
6702
CALL
StealthGas
GASS
$326M
| $25K | ﹤0.01% |
3,500
+3,300
| +1,650% | +$22.8K |
|
6703
CALL
Gevo
GEVO
$353M
| $25K | ﹤0.01% |
46,300
+2,900
| +7% | +$1.94K |
|
6704
WisdomTree Europe Hedged Equity Fund
HEDJ
$1.81B
| $25K | ﹤0.01% |
568
+468
| +468% | +$22.1K |
|
6705
PUT
iShares iBonds 2030 Term High Yield and Income ETF
IBHJ
$151M
| $25K | ﹤0.01% |
2,400
-100
| -4% | -$2.58K |
|
6706
Lincoln Electric
LECO
$14.1B
| $25K | ﹤0.01% |
134
-223
| -62% | -$48.4K |
|
6707
Lightbridge
LTBR
$251M
| $25K | ﹤0.01% |
7,435
+4,611
| +163% | +$12.4K |
|
6708
PUT
Maximus
MMS
$3.32B
| $25K | ﹤0.01% |
+300
| New | +$25.2K |
|
|
MTA
6709
CALL
Metalla Royalty & Streaming
MTA
$689M
| $25K | ﹤0.01% |
+9,300
| New | +$28.6K |
|
6710
Microvast
MVST
$237M
| $25K | ﹤0.01% |
56,119
-16,948
| -23% | -$7.61K |
|
6711
Invesco NASDAQ Next Gen 100 ETF
QQQJ
$1.11B
| $25K | ﹤0.01% |
911
+841
| +1,201% | +$23.4K |
|
6712
Real Brokerage
REAX
$360M
| $25K | ﹤0.01% |
+6,378
| New | +$26.8K |
|
6713
CALL
SEI Investments
SEIC
$12.3B
| $25K | ﹤0.01% |
400
-800
| -67% | -$53.8K |
|
6714
U-Haul Holding Co
UHAL
$14B
| $25K | ﹤0.01% |
406
+139
| +52% | +$9.05K |
|
|
QVCGA
6715
CALL
DELISTED
QVC Group Inc Series A
QVCGA
| $25K | ﹤0.01% |
794
-634
| -44% | -$26.4K |
|
|
NAGE
6716
Niagen Bioscience
NAGE
$256M
| $25K | ﹤0.01% |
+9,304
| New | +$31.1K |
|
6717
CALL
Arteris
AIP
$1.24B
| $24K | ﹤0.01% |
3,300
+2,400
| +267% | +$18.3K |
|
|
AMRN
6718
Amarin Corp
AMRN
$297M
| $24K | ﹤0.01% |
1,763
+1,734
| +5,979% | +$29.8K |
|
6719
Artivion
AORT
$1.34B
| $24K | ﹤0.01% |
+940
| New | +$21.1K |
|
6720
PUT
Blue Ridge Bankshares
BRBS
$312M
| $24K | ﹤0.01% |
+9,300
| New | +$26K |
|
6721
PUT
Baytex Energy
BTE
$2.96B
| $24K | ﹤0.01% |
7,100
| – | – |
|
6722
PUT
Byrna Technologies
BYRN
$98.3M
| $24K | ﹤0.01% |
2,500
| – | – |
|
6723
CALL
Century Communities
CCS
$1.98B
| $24K | ﹤0.01% |
300
-100
| -25% | -$8.33K |
|
6724
CALL
Ceragon Networks
CRNT
$188M
| $24K | ﹤0.01% |
9,700
+1,500
| +18% | +$4.1K |
|
6725
PUT
California Water Service
CWT
$3.1B
| $24K | ﹤0.01% |
500
+300
| +150% | +$14.6K |
|
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.