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 | |
|---|---|---|---|---|---|---|
176
CALL
CrowdStrike
CRWD
$191B
| $84.2M | 0.07% |
2,294,000
-637,600
| -22% | -$22.2M |
|
177
CALL
Mercado Libre
MELI
$91.2B
| $82.8M | 0.07% |
69,900
+31,800
| +83% | +$40M |
|
178
CALL
Palantir
PLTR
$304B
| $82.3M | 0.07% |
5,366,400
+2,923,500
| +120% | +$33.2M |
|
179
PUT
Super Micro Computer
SMCI
$20.5B
| $81.5M | 0.07% |
3,271,000
+2,767,000
| +549% | +$46.4M |
|
180
PUT
McDonald's
MCD
$187B
| $81.4M | 0.07% |
272,700
-129,500
| -32% | -$37.6M |
|
181
PUT
Intuit
INTU
$79.1B
| $80.6M | 0.07% |
175,900
-17,600
| -9% | -$7.71M |
|
|
182
PUT
CrowdStrike
CRWD
$191B
| $80.6M | 0.07% |
2,194,000
-1,347,600
| -38% | -$47M |
|
183
CALL
American Airlines Group
AAL
$9.93B
| $80.2M | 0.07% |
4,473,000
+820,900
| +22% | +$12M |
|
184
PUT
AbbVie
ABBV
$453B
| $79.9M | 0.07% |
593,000
+18,600
| +3% | +$2.73M |
|
|
185
CALL
McDonald's
MCD
$187B
| $79.8M | 0.07% |
267,400
-86,600
| -24% | -$25.2M |
|
186
CALL
Royal Caribbean
RCL
$76.7B
| $79.7M | 0.07% |
768,600
+11,600
| +2% | +$909K |
|
187
PUT
ServiceNow
NOW
$100B
| $79.6M | 0.07% |
708,000
-15,500
| -2% | -$1.55M |
|
188
CALL
First Solar
FSLR
$22.4B
| $79.2M | 0.07% |
416,800
-64,600
| -13% | -$12.8M |
|
189
CALL
Enphase Energy
ENPH
$5.28B
| $79.1M | 0.07% |
472,200
+29,400
| +7% | +$5.25M |
|
190
PUT
iShares Silver Trust
SLV
$29B
| $78.7M | 0.06% |
3,766,000
-90,400
| -2% | -$2.01M |
|
191
CALL
Unity
U
$12.7B
| $78M | 0.06% |
1,797,300
+988,300
| +122% | +$31.6M |
|
192
PUT
IBM
IBM
$197B
| $77.8M | 0.06% |
583,200
-86,600
| -13% | -$11.2M |
|
193
PUT
PepsiCo
PEP
$185B
| $77.7M | 0.06% |
419,500
-428,800
| -51% | -$80M |
|
194
CALL
Union Pacific
UNP
$174B
| $77.5M | 0.06% |
378,600
-429,500
| -53% | -$85.4M |
|
195
CALL
Citigroup
C
$223B
| $77M | 0.06% |
2,026,600
-1,101,800
| -35% | -$51.6M |
|
196
CALL
MongoDB
MDB
$24.2B
| $75.2M | 0.06% |
183,000
-66,500
| -27% | -$19.4M |
|
197
PUT
Wynn Resorts
WYNN
$9.79B
| $74.2M | 0.06% |
702,800
-190,400
| -21% | -$20.4M |
|
198
CALL
General Motors
GM
$74.2B
| $74M | 0.06% |
1,919,500
-522,900
| -21% | -$18.1M |
|
199
PUT
Verizon
VZ
$187B
| $74M | 0.06% |
1,989,700
-596,400
| -23% | -$22.1M |
|
200
CALL
Applied Materials
AMAT
$444B
| $73.8M | 0.06% |
510,900
-321,700
| -39% | -$40.3M |
|
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.