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 | |
|---|---|---|---|---|---|---|
1051
CALL
Nutanix
NTNX
$14.2B
| $7.71M | 0.01% |
274,900
-63,400
| -19% | -$1.68M |
|
|
HZNP
1052
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $7.71M | 0.01% |
74,963
+44,457
| +146% | +$4.69M |
|
1053
iShares Russell 1000 Growth ETF
IWF
$123B
| $7.7M | 0.01% |
111,876
+105,712
| +1,715% | +$6.72M |
|
1054
CALL
DigitalOcean
DOCN
$15.3B
| $7.68M | 0.01% |
191,400
+81,000
| +73% | +$2.99M |
|
1055
CALL
Stellantis
STLA
$16.7B
| $7.67M | 0.01% |
437,200
+191,400
| +78% | +$3.21M |
|
|
SWAV
1056
CALL
DELISTED
Shockwave Medical, Inc. Common Stock
SWAV
| $7.65M | 0.01% |
26,800
+17,400
| +185% | +$4.83M |
|
|
BNY
1057
CALL
Bank of New York Mellon
BNY
$109B
| $7.63M | 0.01% |
171,500
-59,400
| -26% | -$2.55M |
|
1058
CALL
Chord Energy
CHRD
$7.82B
| $7.61M | 0.01% |
49,500
-11,400
| -19% | -$1.65M |
|
1059
CALL
PENN Entertainment
PENN
$2.71B
| $7.59M | 0.01% |
315,700
+113,600
| +56% | +$3.03M |
|
1060
PUT
ArcelorMittal
MT
$49.9B
| $7.58M | 0.01% |
277,200
-63,200
| -19% | -$1.74M |
|
1061
PUT
AvalonBay Communities
AVB
$27.1B
| $7.55M | 0.01% |
39,900
+34,800
| +682% | +$6.21M |
|
1062
CALL
Universal Display
OLED
$3.71B
| $7.54M | 0.01% |
52,300
+3,500
| +7% | +$502K |
|
1063
CALL
Equinix
EQIX
$102B
| $7.53M | 0.01% |
9,600
+400
| +4% | +$293K |
|
1064
CALL
Dynatrace
DT
$11.8B
| $7.52M | 0.01% |
146,200
-11,700
| -7% | -$548K |
|
1065
CALL
Kohl's
KSS
$2.06B
| $7.5M | 0.01% |
325,200
-74,800
| -19% | -$1.62M |
|
1066
PUT
Yum! Brands
YUM
$40.6B
| $7.5M | 0.01% |
54,100
+23,200
| +75% | +$3.15M |
|
1067
PUT
Rambus
RMBS
$11.2B
| $7.48M | 0.01% |
116,600
+87,300
| +298% | +$4.81M |
|
1068
Agnico Eagle Mines
AEM
$72.3B
| $7.45M | 0.01% |
+149,036
| New | +$8.06M |
|
1069
CALL
Plains All American Pipeline
PAA
$17.4B
| $7.43M | 0.01% |
526,800
+47,700
| +10% | +$630K |
|
|
AYX
1070
CALL
DELISTED
Alteryx Inc
AYX
| $7.42M | 0.01% |
163,500
+33,400
| +26% | +$1.46M |
|
1071
PUT
Aflac
AFL
$63.3B
| $7.4M | 0.01% |
106,000
+3,600
| +4% | +$241K |
|
1072
PUT
Tapestry
TPR
$28.1B
| $7.39M | 0.01% |
172,700
+39,300
| +29% | +$1.64M |
|
1073
AbbVie
ABBV
$454B
| $7.36M | 0.01% |
54,641
-12,885
| -19% | -$1.89M |
|
1074
PUT
Ralph Lauren
RL
$22.1B
| $7.36M | 0.01% |
59,700
-60,100
| -50% | -$6.94M |
|
1075
PUT
NetEase
NTES
$76.9B
| $7.32M | 0.01% |
75,700
-4,800
| -6% | -$433K |
|
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.