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 | |
|---|---|---|---|---|---|---|
6676
PUT
Halozyme
HALO
$9.88B
| $26K | ﹤0.01% |
500
-1,300
| -72% | -$57K |
|
6677
PUT
Houlihan Lokey
HLI
$9.72B
| $26K | ﹤0.01% |
+200
| New | +$26.2K |
|
6678
PUT
Kaiser Aluminum
KALU
$2.48B
| $26K | ﹤0.01% |
+300
| New | +$27.9K |
|
6679
AdvisorShares MSOS 2X Daily ETF
MSOX
$45.3M
| $26K | ﹤0.01% |
468
+326
| +230% | +$28.9K |
|
6680
CALL
Neonode
NEON
$12.6M
| $26K | ﹤0.01% |
12,900
-8,700
| -40% | -$18.6K |
|
|
NFGC
6681
PUT
New Found Gold
NFGC
$526M
| $26K | ﹤0.01% |
9,400
+3,400
| +57% | +$12K |
|
|
ADAM
6682
CALL
Adamas Trust
ADAM
$777M
| $26K | ﹤0.01% |
4,600
+3,500
| +318% | +$22.4K |
|
6683
PUT
Paysign
PAYS
$517M
| $26K | ﹤0.01% |
6,100
+5,200
| +578% | +$22.9K |
|
6684
PJT Partners
PJT
$4.26B
| $26K | ﹤0.01% |
+247
| New | +$24.8K |
|
6685
PUT
Outdoor Holding Co
POWW
$249M
| $26K | ﹤0.01% |
15,600
+6,800
| +77% | +$16.4K |
|
6686
PUT
Quest Resource Holding
QRHC
$27.6M
| $26K | ﹤0.01% |
+3,000
| New | +$27.6K |
|
|
RGLS
6687
PUT
DELISTED
Regulus Therapeutics
RGLS
| $26K | ﹤0.01% |
15,000
-1,700
| -10% | -$3.94K |
|
6688
CALL
Solid Biosciences
SLDB
$792M
| $26K | ﹤0.01% |
4,600
-4,400
| -49% | -$39.4K |
|
6689
PUT
Suburban Propane Partners
SPH
$1.21B
| $26K | ﹤0.01% |
1,400
+200
| +17% | +$3.94K |
|
|
NSLR
6690
Neostellar Capital Corp
NSLR
$258M
| $26K | ﹤0.01% |
6,498
+5,257
| +424% | +$21.1K |
|
6691
Mammoth Energy Services
TUSK
$122M
| $26K | ﹤0.01% |
+8,061
| New | +$27.7K |
|
6692
CALL
Metallus
MTUS
$833M
| $26K | ﹤0.01% |
1,300
-14,100
| -92% | -$308K |
|
|
HAYN
6693
DELISTED
Haynes International, Inc.
HAYN
| $26K | ﹤0.01% |
459
-2,543
| -85% | -$151K |
|
|
ASTR
6694
DELISTED
Astra Space, Inc. Class A Common Stock
ASTR
| $26K | ﹤0.01% |
+51,703
| New | +$31.6K |
|
|
CHCT
6695
PUT
Community Healthcare Trust
CHCT
$536M
| $25K | ﹤0.01% |
1,100
+300
| +38% | +$7.29K |
|
6696
PUT
Comtech Telecommunications
CMTL
$49.7M
| $25K | ﹤0.01% |
+8,500
| New | +$20.1K |
|
6697
Cavco Industries
CVCO
$4.36B
| $25K | ﹤0.01% |
73
-225
| -76% | -$81.9K |
|
6698
Dave Inc
DAVE
$4.82B
| $25K | ﹤0.01% |
856
+582
| +212% | +$23.6K |
|
6699
PUT
Delcath Systems
DCTH
$400M
| $25K | ﹤0.01% |
3,100
-3,600
| -54% | -$22.8K |
|
6700
PUT
VanEck Energy Income ETF
EINC
$77.6M
| $25K | ﹤0.01% |
1,600
-300
| -16% | -$23K |
|
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.