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 | |
|---|---|---|---|---|---|---|
7376
ProQR Therapeutics
PRQR
$244M
| $11K | ﹤0.01% |
6,628
-6,922
| -51% | -$13.4K |
|
7377
CALL
Radiant Logistics
RLGT
$415M
| $11K | ﹤0.01% |
2,000
-1,900
| -49% | -$9.89K |
|
|
RVPH
7378
PUT
DELISTED
REVIVA PHARMA HLDGS INC
RVPH
| $11K | ﹤0.01% |
455
-305
| -40% | -$13.9K |
|
|
BNKK
7379
Bonk Inc
BNKK
$8.88M
| $11K | ﹤0.01% |
278
-242
| -47% | -$12.7K |
|
7380
PUT
Smith Micro Software
SMSI
$14.1M
| $11K | ﹤0.01% |
+1,020
| New | +$12K |
|
7381
CALL
Scholar Rock
SRRK
$5.86B
| $11K | ﹤0.01% |
1,400
-700
| -33% | -$8.56K |
|
7382
Tucows
TCX
$95.5M
| $11K | ﹤0.01% |
611
+558
| +1,053% | +$10.7K |
|
|
TOUR
7383
PUT
Tuniu
TOUR
$55M
| $11K | ﹤0.01% |
1,390
+710
| +104% | +$6.61K |
|
|
TPIC
7384
CALL
DELISTED
TPI Composites
TPIC
| $11K | ﹤0.01% |
2,900
| – | – |
|
7385
GraniteShares 2x Long TSLA Daily ETF
TSLR
$58.4M
| $11K | ﹤0.01% |
+801
| New | +$9.11K |
|
7386
ProShares Ultra Euro
ULE
$4.28M
| $11K | ﹤0.01% |
1,000
-477
| -32% | -$5.39K |
|
7387
CALL
US Gold Corp
USAU
$221M
| $11K | ﹤0.01% |
+2,200
| New | +$10.9K |
|
7388
PUT
Zedge
ZDGE
$38.7M
| $11K | ﹤0.01% |
+3,900
| New | +$10.5K |
|
|
TE
7389
PUT
T1 Energy
TE
$1.37B
| $11K | ﹤0.01% |
6,700
+4,900
| +272% | +$9.36K |
|
|
ICD
7390
DELISTED
Independence Contract Drilling, Inc.
ICD
| $11K | ﹤0.01% |
8,843
+514
| +6% | +$841 |
|
7391
Allegion
ALLE
$13.4B
| $10K | ﹤0.01% |
+90
| New | +$11.1K |
|
|
AMRN
7392
PUT
Amarin Corp
AMRN
$290M
| $10K | ﹤0.01% |
730
-415
| -36% | -$7.13K |
|
|
OPTU
7393
CALL
Optimum Communications Inc
OPTU
$298M
| $10K | ﹤0.01% |
5,300
-86,600
| -94% | -$192K |
|
|
BASE
7394
PUT
DELISTED
Couchbase
BASE
| $10K | ﹤0.01% |
600
-20,700
| -97% | -$482K |
|
|
BCYC
7395
Bicycle Therapeutics
BCYC
$276M
| $10K | ﹤0.01% |
520
-9,310
| -95% | -$210K |
|
|
BLDP
7396
PUT
Ballard Power Systems
BLDP
$865M
| $10K | ﹤0.01% |
4,600
-4,600
| -50% | -$13.1K |
|
7397
CALL
DMC Global
BOOM
$117M
| $10K | ﹤0.01% |
700
-1,700
| -71% | -$25.3K |
|
7398
CALL
BioXcel Therapeutics
BTAI
$26.8M
| $10K | ﹤0.01% |
494
+25
| +5% | +$837 |
|
7399
PUT
Compañía de Minas Buenaventura
BVN
$8.06B
| $10K | ﹤0.01% |
600
-3,800
| -86% | -$64.2K |
|
7400
PUT
Cato Corp
CATO
$64.1M
| $10K | ﹤0.01% |
1,900
+1,100
| +138% | +$5.92K |
|
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.