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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
BRFS
6851
PUT
DELISTED
BRF SA
BRFS
| $18K | ﹤0.01% |
+9,800
| New | +$15.1K |
|
6852
Global X Cybersecurity ETF
BUG
$1.25B
| $18K | ﹤0.01% |
+766
| New | +$17.7K |
|
6853
Betterware México
BWMX
$632M
| $18K | ﹤0.01% |
+1,413
| New | +$17.1K |
|
6854
CALL
BuzzFeed
BZFD
$99M
| $18K | ﹤0.01% |
8,925
-66,775
| -88% | -$180K |
|
|
CEPU
6855
PUT
Central Puerto
CEPU
$2.16B
| $18K | ﹤0.01% |
2,600
| – | – |
|
6856
PUT
CION Investment
CION
$297M
| $18K | ﹤0.01% |
1,800
+700
| +64% | +$6.9K |
|
6857
VanEck Oil Refiners ETF
CRAK
$209M
| $18K | ﹤0.01% |
+625
| New | +$19.1K |
|
6858
CALL
Cardiff Oncology
CRDF
$63M
| $18K | ﹤0.01% |
12,700
-1,000
| -7% | -$1.61K |
|
|
CTO
6859
PUT
CTO Realty Growth
CTO
$756M
| $18K | ﹤0.01% |
1,100
-2,600
| -70% | -$42.9K |
|
|
DESP
6860
DELISTED
Despegar.com
DESP
| $18K | ﹤0.01% |
+2,628
| New | +$16.1K |
|
|
DRD
6861
PUT
DRDGold
DRD
$1.75B
| $18K | ﹤0.01% |
1,700
+700
| +70% | +$7.95K |
|
6862
CALL
Destination XL Group
DXLG
$32.9M
| $18K | ﹤0.01% |
3,800
+2,200
| +138% | +$10.3K |
|
6863
New Oriental
EDU
$9.32B
| $18K | ﹤0.01% |
458
-14,137
| -97% | -$566K |
|
6864
iShares MSCI Australia ETF
EWA
$1.38B
| $18K | ﹤0.01% |
835
-1,644
| -66% | -$37.6K |
|
|
GAMB
6865
CALL
DELISTED
Gambling.com
GAMB
| $18K | ﹤0.01% |
+1,800
| New | +$18.1K |
|
6866
CALL
Hillman Solutions
HLMN
$1.57B
| $18K | ﹤0.01% |
2,000
-7,200
| -78% | -$60K |
|
6867
PUT
Hooker Furnishings Corp
HOFT
$147M
| $18K | ﹤0.01% |
+1,000
| New | +$17K |
|
|
HYFT
6868
PUT
MindWalk Holdings
HYFT
$60.7M
| $18K | ﹤0.01% |
6,300
-3,100
| -33% | -$9.01K |
|
6869
PUT
Kopin
KOPN
$586M
| $18K | ﹤0.01% |
8,400
+6,700
| +394% | +$10K |
|
|
KREF
6870
KKR Real Estate Finance Trust
KREF
$466M
| $18K | ﹤0.01% |
1,484
-2,813
| -65% | -$31.7K |
|
|
KRON
6871
CALL
DELISTED
Kronos Bio
KRON
| $18K | ﹤0.01% |
10,700
+6,600
| +161% | +$10.5K |
|
6872
PUT
Lloyds Banking Group
LYG
$85.2B
| $18K | ﹤0.01% |
8,500
-45,100
| -84% | -$103K |
|
6873
CALL
Noodles & Co
NDLS
$95.1M
| $18K | ﹤0.01% |
675
-563
| -45% | -$18.4K |
|
6874
PUT
Newegg Commerce
NEGG
$273M
| $18K | ﹤0.01% |
800
-110
| -12% | -$2.48K |
|
6875
CALL
Nexa Resources
NEXA
$1.61B
| $18K | ﹤0.01% |
3,900
-8,600
| -69% | -$48.8K |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.