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 | |
|---|---|---|---|---|---|---|
601
CALL
Cigna
CI
$75.9B
| $24.1M | 0.01% |
66,300
-86,000
| -56% | -$28.3M |
|
602
CALL
AutoZone
AZO
$47.6B
| $24M | 0.01% |
7,600
-500
| -6% | -$1.43M |
|
603
PUT
Take-Two Interactive
TTWO
$42.7B
| $24M | 0.01% |
161,300
-15,900
| -9% | -$2.47M |
|
604
PUT
Agnico Eagle Mines
AEM
$72.2B
| $23.9M | 0.01% |
401,200
+11,800
| +3% | +$604K |
|
605
CALL
Sarepta Therapeutics
SRPT
$1.68B
| $23.8M | 0.01% |
184,200
-347,500
| -65% | -$42.6M |
|
|
CFLT
606
CALL
DELISTED
Confluent
CFLT
| $23.8M | 0.01% |
780,600
-51,900
| -6% | -$1.47M |
|
607
CALL
Williams-Sonoma
WSM
$25.6B
| $23.8M | 0.01% |
150,000
-68,200
| -31% | -$7.92M |
|
608
CALL
Cboe Global Markets
CBOE
$30B
| $23.7M | 0.01% |
129,000
-7,200
| -5% | -$1.33M |
|
609
Booking.com
BKNG
$134B
| $23.7M | 0.01% |
163,300
+149,850
| +1,114% | +$21.4M |
|
610
CALL
Lyft
LYFT
$5.3B
| $23.6M | 0.01% |
1,221,800
-1,766,500
| -59% | -$27.1M |
|
611
PUT
Chubb
CB
$136B
| $23.6M | 0.01% |
91,200
+18,400
| +25% | +$4.52M |
|
612
PUT
Quanta Services
PWR
$97.6B
| $23.6M | 0.01% |
90,900
+300
| +0.3% | +$66.4K |
|
613
PUT
Antero Resources
AR
$10.9B
| $23.6M | 0.01% |
813,700
-397,400
| -33% | -$9.59M |
|
614
CALL
HCA Healthcare
HCA
$82.7B
| $23.5M | 0.01% |
70,600
-46,100
| -40% | -$14.1M |
|
615
CALL
Ferrari
RACE
$63.3B
| $23.5M | 0.01% |
54,000
+12,100
| +29% | +$4.69M |
|
616
CALL
Energy Transfer Partners
ET
$70.3B
| $23.5M | 0.01% |
1,494,800
-201,400
| -12% | -$2.93M |
|
617
CALL
UBS Group
UBS
$170B
| $23.4M | 0.01% |
761,800
-494,300
| -39% | -$14.6M |
|
618
PUT
HP
HPQ
$22.7B
| $23.4M | 0.01% |
774,100
+159,200
| +26% | +$4.69M |
|
619
CALL
Boston Scientific
BSX
$64.1B
| $23.3M | 0.01% |
340,600
-38,200
| -10% | -$2.46M |
|
620
CALL
Franco-Nevada
FNV
$41.4B
| $23.3M | 0.01% |
195,400
-20,800
| -10% | -$2.29M |
|
621
PUT
Truist Financial
TFC
$62.1B
| $23.3M | 0.01% |
597,200
-248,100
| -29% | -$9.08M |
|
622
CALL
Domino's
DPZ
$10.5B
| $23.2M | 0.01% |
46,600
-51,200
| -52% | -$22.2M |
|
623
PUT
Best Buy
BBY
$17.7B
| $23.1M | 0.01% |
281,800
-72,500
| -20% | -$5.52M |
|
624
CALL
XPO
XPO
$25.2B
| $23.1M | 0.01% |
189,400
-34,700
| -15% | -$3.71M |
|
625
CALL
Cenovus Energy
CVE
$55.6B
| $23.1M | 0.01% |
1,155,600
+418,100
| +57% | +$7.14M |
|
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.