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 | |
|---|---|---|---|---|---|---|
5226
CALL
New Mountain Finance
NMFC
$653M
| $116K | ﹤0.01% |
9,500
+8,200
| +631% | +$103K |
|
|
PBPB
5227
CALL
DELISTED
Potbelly
PBPB
| $116K | ﹤0.01% |
14,500
-16,300
| -53% | -$151K |
|
5228
Rexford Industrial Realty
REXR
$8.56B
| $116K | ﹤0.01% |
2,623
-3,205
| -55% | -$144K |
|
5229
CALL
Ryanair
RYAAY
$31.2B
| $116K | ﹤0.01% |
2,500
-6,000
| -71% | -$312K |
|
5230
PUT
Teledyne Technologies
TDY
$30.1B
| $116K | ﹤0.01% |
300
| – | – |
|
5231
CALL
Tradeweb Markets
TW
$20.8B
| $116K | ﹤0.01% |
1,100
-1,000
| -48% | -$106K |
|
|
PRFT
5232
DELISTED
Perficient Inc
PRFT
| $116K | ﹤0.01% |
+1,555
| New | +$99.3K |
|
5233
Allegiant Air
ALGT
$2.66B
| $115K | ﹤0.01% |
2,292
-19,562
| -90% | -$1.1M |
|
5234
CALL
Amcor
AMCR
$20.9B
| $115K | ﹤0.01% |
2,360
+1,300
| +123% | +$63.1K |
|
|
HIVE
5235
PUT
HIVE Digital Technologies
HIVE
$821M
| $115K | ﹤0.01% |
37,500
-128,300
| -77% | -$360K |
|
5236
PUT
KBR
KBR
$4.36B
| $115K | ﹤0.01% |
1,800
-146,700
| -99% | -$9.48M |
|
|
NSA
5237
CALL
DELISTED
National Storage Affiliates Trust
NSA
| $115K | ﹤0.01% |
2,800
-27,800
| -91% | -$1.05M |
|
5238
PUT
Grupo Aeroportuario Centro Norte
OMAB
$5.22B
| $115K | ﹤0.01% |
1,700
+400
| +31% | +$31.8K |
|
|
REFI
5239
CALL
Chicago Atlantic Real Estate Finance
REFI
$249M
| $115K | ﹤0.01% |
7,500
-8,500
| -53% | -$133K |
|
|
5240
PUT
Rexford Industrial Realty
REXR
$8.56B
| $115K | ﹤0.01% |
2,600
-79,200
| -97% | -$3.57M |
|
|
SEM
5241
PUT
DELISTED
Select Medical
SEM
| $115K | ﹤0.01% |
6,125
+5,939
| +3,193% | +$101K |
|
5242
CALL
ProShares UltraShort Industrials
SIJ
$5.97M
| $115K | ﹤0.01% |
625
-8,625
| -93% | -$339K |
|
|
VRNT
5243
CALL
DELISTED
Verint Systems
VRNT
| $115K | ﹤0.01% |
3,600
-3,300
| -48% | -$105K |
|
5244
Denali Therapeutics
DNLI
$3.86B
| $114K | ﹤0.01% |
4,934
+6
| +0.1% | +$115 |
|
5245
CALL
Ivanhoe Electric
IE
$1.48B
| $114K | ﹤0.01% |
12,200
+8,600
| +239% | +$91.4K |
|
5246
Kamada
KMDA
$410M
| $114K | ﹤0.01% |
22,939
+1,371
| +6% | +$7.23K |
|
5247
CALL
Prime Medicine
PRME
$545M
| $114K | ﹤0.01% |
22,200
+21,800
| +5,450% | +$132K |
|
5248
Perella Weinberg Partners
PWP
$1.09B
| $114K | ﹤0.01% |
7,067
-7,065
| -50% | -$107K |
|
5249
CALL
Qualys
QLYS
$4.99B
| $114K | ﹤0.01% |
800
-3,600
| -82% | -$548K |
|
5250
CALL
Banco Santander
SAN
$202B
| $114K | ﹤0.01% |
24,700
-15,500
| -39% | -$76.3K |
|
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.