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 | |
|---|---|---|---|---|---|---|
201
PUT
McDonald's
MCD
$187B
| $87.7M | 0.05% |
310,900
-176,400
| -36% | -$51.3M |
|
202
PUT
Enphase Energy
ENPH
$5.28B
| $87.6M | 0.05% |
724,000
+103,200
| +17% | +$12M |
|
203
CALL
Amgen
AMGN
$200B
| $87.5M | 0.05% |
307,600
+43,300
| +16% | +$12.7M |
|
204
PUT
American Airlines Group
AAL
$9.91B
| $87.2M | 0.05% |
5,678,400
-717,900
| -11% | -$10.4M |
|
205
CALL
Robinhood
HOOD
$94.4B
| $86.3M | 0.05% |
4,286,200
+80,300
| +2% | +$1.13M |
|
206
PUT
Humana
HUM
$48.1B
| $86.2M | 0.05% |
248,700
-24,300
| -9% | -$9.21M |
|
207
PUT
Lam Research
LRCX
$397B
| $85.5M | 0.05% |
880,000
-1,046,000
| -54% | -$92M |
|
208
PUT
ConocoPhillips
COP
$145B
| $85.5M | 0.05% |
671,400
+53,000
| +9% | +$6.05M |
|
209
PUT
ARK Space & Defense Innovation ETF
ARKX
$826M
| $85.1M | 0.05% |
1,992,500
-2,244,200
| -53% | -$32.8M |
|
210
PUT
United Airlines
UAL
$38B
| $84.8M | 0.05% |
1,771,800
-342,000
| -16% | -$14.7M |
|
211
PUT
Valero Energy
VLO
$93.1B
| $84.2M | 0.05% |
493,000
+141,400
| +40% | +$20.3M |
|
212
CALL
Newmont
NEM
$102B
| $83.9M | 0.05% |
2,442,100
+1,294,800
| +113% | +$44.6M |
|
213
PUT
RH
RH
$3.3B
| $83.8M | 0.05% |
240,600
-44,900
| -16% | -$12.2M |
|
214
CALL
RTX Corp
RTX
$263B
| $83.7M | 0.05% |
858,400
+143,700
| +20% | +$13M |
|
215
CALL
3M
MMM
$90.4B
| $83.4M | 0.05% |
939,936
+513,084
| +120% | +$42.5M |
|
216
PUT
Merck
MRK
$317B
| $82.6M | 0.05% |
626,300
+65,300
| +12% | +$8.05M |
|
217
CALL
Procter & Gamble
PG
$348B
| $82.6M | 0.05% |
509,100
-89,900
| -15% | -$14.1M |
|
218
CALL
CVS Health
CVS
$140B
| $82.6M | 0.05% |
1,035,200
+213,100
| +26% | +$16.3M |
|
219
PUT
Charter Communications
CHTR
$15.7B
| $82.4M | 0.05% |
283,400
+189,000
| +200% | +$60.8M |
|
220
CALL
Linde
LIN
$235B
| $81.3M | 0.05% |
175,000
+69,700
| +66% | +$30.2M |
|
221
CALL
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$256M
| $81.1M | 0.05% |
3,538,600
-975,100
| -22% | -$32.3M |
|
222
PUT
JD.com
JD
$40.8B
| $81M | 0.05% |
2,957,900
+181,000
| +7% | +$4.43M |
|
223
PUT
DraftKings
DKNG
$11.4B
| $80.6M | 0.05% |
2,221,700
+507,200
| +30% | +$20.6M |
|
|
224
CALL
McDonald's
MCD
$187B
| $79.7M | 0.05% |
282,700
-62,600
| -18% | -$18.2M |
|
225
CALL
Lennar Class A
LEN
$19.8B
| $79.3M | 0.05% |
476,110
+149,165
| +46% | +$22.4M |
|
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.