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 | |
|---|---|---|---|---|---|---|
251
PUT
Arista Networks
ANET
$222B
| $70.2M | 0.04% |
968,400
-129,200
| -12% | -$8.71M |
|
252
PUT
Newmont
NEM
$103B
| $70.2M | 0.04% |
1,958,500
+780,600
| +66% | +$26.9M |
|
253
PUT
iShares Silver Trust
SLV
$29B
| $70M | 0.04% |
3,076,400
+207,900
| +7% | +$4.44M |
|
254
PUT
Linde
LIN
$235B
| $69.9M | 0.04% |
150,500
+13,000
| +9% | +$5.63M |
|
255
PUT
Intuit
INTU
$78.8B
| $69.5M | 0.04% |
106,900
-68,100
| -39% | -$43.5M |
|
256
CALL
Deere & Co
DE
$164B
| $69M | 0.04% |
168,100
-24,500
| -13% | -$9.39M |
|
257
PUT
Moderna
MRNA
$23.5B
| $68.4M | 0.04% |
641,700
+103,900
| +19% | +$10.5M |
|
258
CALL
Archer Daniels Midland
ADM
$41.7B
| $67.9M | 0.04% |
1,080,900
+710,900
| +192% | +$41.7M |
|
259
CALL
Royal Caribbean
RCL
$77.1B
| $67.6M | 0.04% |
486,300
-129,200
| -21% | -$16.1M |
|
260
CALL
Vertiv
VRT
$115B
| $67.4M | 0.04% |
825,100
-1,100
| -0.1% | -$69.1K |
|
|
261
PUT
Vertiv
VRT
$115B
| $67.4M | 0.04% |
824,900
+763,300
| +1,239% | +$48M |
|
262
PUT
SLB Ltd
SLB
$71B
| $67.3M | 0.04% |
1,227,700
+117,200
| +11% | +$5.91M |
|
263
CALL
Baidu
BIDU
$36.6B
| $67.3M | 0.04% |
639,100
+242,000
| +61% | +$25.8M |
|
264
PUT
T-Mobile US
TMUS
$206B
| $66.8M | 0.04% |
409,400
-96,500
| -19% | -$15.7M |
|
265
CALL
ARK Space & Defense Innovation ETF
ARKX
$829M
| $66.7M | 0.04% |
1,488,000
-1,746,500
| -54% | -$25.6M |
|
|
266
Boeing
BA
$163B
| $66.7M | 0.04% |
+345,653
| New | +$71M |
|
267
PUT
Datadog
DDOG
$88.3B
| $66.6M | 0.04% |
539,100
+96,900
| +22% | +$12.2M |
|
268
CALL
Vistra
VST
$56.3B
| $66.6M | 0.04% |
956,300
+799,000
| +508% | +$39.5M |
|
269
PUT
Sea Limited
SE
$64.8B
| $66.4M | 0.04% |
1,235,700
-193,200
| -14% | -$8.89M |
|
|
SCHW
270
CALL
Charles Schwab
SCHW
$173B
| $66M | 0.04% |
912,900
-780,700
| -46% | -$51.4M |
|
271
CALL
RH
RH
$3.32B
| $65.9M | 0.04% |
189,100
-84,700
| -31% | -$23.1M |
|
272
PUT
Albemarle
ALB
$14B
| $65.8M | 0.04% |
499,400
-278,000
| -36% | -$34.2M |
|
273
PUT
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$252M
| $65.8M | 0.04% |
2,196,000
+216,300
| +11% | +$7.16M |
|
274
CALL
First Solar
FSLR
$22.8B
| $65.3M | 0.04% |
387,000
+37,000
| +11% | +$5.69M |
|
275
PUT
AbbVie
ABBV
$453B
| $64.9M | 0.04% |
356,300
+23,100
| +7% | +$3.98M |
|
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.