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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
226
CALL
Bristol-Myers Squibb
BMY
$125B
| $78.3M | 0.05% |
1,444,300
-172,600
| -11% | -$8.79M |
|
227
CALL
Verizon
VZ
$186B
| $78.1M | 0.05% |
1,860,900
+307,400
| +20% | +$12.4M |
|
228
CALL
Moderna
MRNA
$23.5B
| $77.5M | 0.04% |
727,300
-189,200
| -21% | -$19.1M |
|
229
PUT
VanEck Durable High Dividend ETF
DURA
$38.4M
| $77.2M | 0.04% |
286,800
+120,800
| +73% | +$3.76M |
|
230
PUT
MongoDB
MDB
$24.6B
| $76.8M | 0.04% |
214,100
-41,100
| -16% | -$16.8M |
|
231
PUT
Procter & Gamble
PG
$350B
| $76.7M | 0.04% |
472,600
-427,300
| -47% | -$67M |
|
232
CALL
Lam Research
LRCX
$400B
| $76.7M | 0.04% |
789,000
-115,000
| -13% | -$10.1M |
|
233
CALL
Spotify
SPOT
$98.1B
| $76M | 0.04% |
288,100
-239,000
| -45% | -$56.1M |
|
234
PUT
Blackstone
BX
$150B
| $75.9M | 0.04% |
577,800
-57,100
| -9% | -$7.13M |
|
235
CALL
Delta Air Lines
DAL
$55.5B
| $75.8M | 0.04% |
1,583,800
-42,000
| -3% | -$1.74M |
|
236
CALL
Union Pacific
UNP
$174B
| $75.6M | 0.04% |
307,500
-94,300
| -23% | -$23.2M |
|
237
PUT
Home Depot
HD
$332B
| $75.6M | 0.04% |
197,000
-241,500
| -55% | -$88.2M |
|
238
PUT
Accenture
ACN
$86B
| $75M | 0.04% |
216,400
-62,600
| -22% | -$22.8M |
|
239
CALL
iShares MSCI Australia ETF
EWA
$1.35B
| $74.9M | 0.04% |
2,347,900
+982,700
| +72% | +$23.4M |
|
240
CALL
Eaton
ETN
$158B
| $74.5M | 0.04% |
238,400
+89,400
| +60% | +$24.4M |
|
241
CALL
Lockheed Martin
LMT
$119B
| $73.9M | 0.04% |
162,500
-65,100
| -29% | -$28.5M |
|
242
CALL
Zscaler
ZS
$23.3B
| $73.5M | 0.04% |
381,400
+62,200
| +19% | +$13.9M |
|
243
PUT
Amgen
AMGN
$198B
| $73.4M | 0.04% |
258,300
-11,800
| -4% | -$3.45M |
|
244
CALL
ServiceNow
NOW
$99.7B
| $73.4M | 0.04% |
481,500
+28,500
| +6% | +$4.32M |
|
|
KFYP
245
PUT
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $72.8M | 0.04% |
2,772,400
-1,734,400
| -38% | -$45.5M |
|
246
PUT
PepsiCo
PEP
$185B
| $72.5M | 0.04% |
414,200
+116,800
| +39% | +$19.7M |
|
247
PUT
Baidu
BIDU
$36.6B
| $72.3M | 0.04% |
686,700
+166,200
| +32% | +$17.7M |
|
248
PUT
Starbucks
SBUX
$118B
| $71.8M | 0.04% |
785,100
-71,100
| -8% | -$6.61M |
|
249
PUT
Royal Caribbean
RCL
$77.1B
| $71.1M | 0.04% |
684,300
-463,300
| -40% | -$57.9M |
|
250
CALL
Coca-Cola
KO
$355B
| $70.6M | 0.04% |
1,154,500
-190,800
| -14% | -$11.5M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.