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 | |
|---|---|---|---|---|---|---|
2676
PUT
Marriott Vacations Worldwide
VAC
$3.24B
| $920K | ﹤0.01% |
7,500
-7,900
| -51% | -$1.02M |
|
|
FIRY
2677
CALL
Firy Inc
FIRY
$127M
| $918K | ﹤0.01% |
100,900
+93,715
| +1,304% | +$1.08M |
|
|
BPMC
2678
DELISTED
Blueprint Medicines
BPMC
| $917K | ﹤0.01% |
14,524
+14,234
| +4,908% | +$774K |
|
2679
PUT
TC Energy
TRP
$73.5B
| $917K | ﹤0.01% |
22,700
+5,200
| +30% | +$212K |
|
2680
CALL
Wendy's
WEN
$1.33B
| $917K | ﹤0.01% |
42,200
+19,800
| +88% | +$441K |
|
2681
CALL
Greif
GEF
$4.47B
| $916K | ﹤0.01% |
13,300
-23,100
| -63% | -$1.48M |
|
2682
CALL
HDFC Bank
HDB
$119B
| $913K | ﹤0.01% |
26,200
-37,600
| -59% | -$1.27M |
|
2683
PUT
Ubiquiti
UI
$31.8B
| $913K | ﹤0.01% |
5,200
+4,700
| +940% | +$948K |
|
2684
CALL
Aviat Networks
AVNW
$262M
| $911K | ﹤0.01% |
27,300
-1,200
| -4% | -$38.2K |
|
2685
CALL
EVgo
EVGO
$200M
| $911K | ﹤0.01% |
227,800
+37,500
| +20% | +$191K |
|
2686
PUT
W.R. Berkley
WRB
$28B
| $911K | ﹤0.01% |
22,950
+21,750
| +1,813% | +$855K |
|
2687
PUT
Arvinas
ARVN
$518M
| $910K | ﹤0.01% |
36,700
+28,500
| +348% | +$733K |
|
|
CNH
2688
CNH Industrial
CNH
$13.8B
| $909K | ﹤0.01% |
63,188
+26,636
| +73% | +$374K |
|
2689
PUT
SouthState Bank Corp
SSB
$10.3B
| $908K | ﹤0.01% |
13,800
+12,600
| +1,050% | +$841K |
|
2690
Amplify Junior Silver Miners ETF
SILJ
$3.27B
| $907K | ﹤0.01% |
96,792
+21,049
| +28% | +$219K |
|
2691
PUT
SIGA Technologies
SIGA
$223M
| $906K | ﹤0.01% |
179,600
+52,800
| +42% | +$300K |
|
2692
Kohl's
KSS
$2.03B
| $905K | ﹤0.01% |
39,268
-71,359
| -65% | -$1.54M |
|
2693
PUT
Ashland
ASH
$3.04B
| $903K | ﹤0.01% |
10,400
+4,600
| +79% | +$425K |
|
2694
Kornit Digital
KRNT
$706M
| $902K | ﹤0.01% |
30,715
+6,337
| +26% | +$143K |
|
2695
CALL
Autoliv
ALV
$8.6B
| $901K | ﹤0.01% |
10,600
-14,100
| -57% | -$1.22M |
|
2696
PUT
Prothena Corp
PRTA
$458M
| $901K | ﹤0.01% |
13,200
+8,000
| +154% | +$516K |
|
2697
PUT
Global E Online
GLBE
$6.08B
| $900K | ﹤0.01% |
22,000
+13,100
| +147% | +$431K |
|
2698
PUT
Stride
LRN
$3.69B
| $900K | ﹤0.01% |
24,200
+10,400
| +75% | +$416K |
|
|
FIRY
2699
PUT
Firy Inc
FIRY
$127M
| $900K | ﹤0.01% |
99,000
+95,500
| +2,729% | +$1.1M |
|
|
GAP
2700
The Gap Inc
GAP
$6.84B
| $899K | ﹤0.01% |
100,740
-101,104
| -50% | -$902K |
|
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.