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 | |
|---|---|---|---|---|---|---|
2576
nVent Electric
NVT
$24.5B
| $1.69M | ﹤0.01% |
+22,471
| New | +$1.44M |
|
2577
CALL
Virtu Financial
VIRT
$5.2B
| $1.69M | ﹤0.01% |
82,600
+49,800
| +152% | +$918K |
|
2578
CALL
Booz Allen Hamilton
BAH
$8.7B
| $1.69M | ﹤0.01% |
11,400
-700
| -6% | -$98.6K |
|
|
SPWR
2579
PUT
DELISTED
SunPower Corporation Common Stock
SPWR
| $1.69M | ﹤0.01% |
563,900
-857,200
| -60% | -$2.82M |
|
2580
CALL
Moody's
MCO
$81.7B
| $1.69M | ﹤0.01% |
4,300
-39,600
| -90% | -$15.3M |
|
2581
CALL
FLEX LNG
FLNG
$1.67B
| $1.69M | ﹤0.01% |
66,400
-29,400
| -31% | -$805K |
|
2582
PUT
Atea Pharmaceuticals
AVIR
$379M
| $1.69M | ﹤0.01% |
+417,400
| New | +$1.63M |
|
2583
CALL
Kinetik
KNTK
$3.71B
| $1.68M | ﹤0.01% |
+42,200
| New | +$1.45M |
|
2584
CALL
Universal Health Services
UHS
$9.43B
| $1.68M | ﹤0.01% |
9,200
+6,200
| +207% | +$1.02M |
|
|
ALTM
2585
CALL
DELISTED
Arcadium Lithium plc
ALTM
| $1.68M | ﹤0.01% |
+389,500
| New | +$1.95M |
|
2586
CALL
Camping World
CWH
$363M
| $1.68M | ﹤0.01% |
60,200
-185,400
| -75% | -$4.78M |
|
|
LAC
2587
CALL
Lithium Americas
LAC
$986M
| $1.67M | ﹤0.01% |
276,500
+20,500
| +8% | +$106K |
|
2588
CALL
Bruker
BRKR
$9.2B
| $1.67M | ﹤0.01% |
17,800
+5,600
| +46% | +$451K |
|
2589
PUT
Braze
BRZE
$2.45B
| $1.67M | ﹤0.01% |
37,700
+35,600
| +1,695% | +$1.92M |
|
2590
Barclays
BCS
$94.1B
| $1.67M | ﹤0.01% |
176,459
+136,840
| +345% | +$1.12M |
|
2591
CALL
Leonardo DRS
DRS
$12.8B
| $1.67M | ﹤0.01% |
75,500
+31,700
| +72% | +$658K |
|
|
ANSS
2592
PUT
DELISTED
Ansys
ANSS
| $1.67M | ﹤0.01% |
4,800
-45,000
| -90% | -$15.2M |
|
2593
PUT
MINISO
MNSO
$3.64B
| $1.66M | ﹤0.01% |
81,200
-43,600
| -35% | -$834K |
|
2594
CALL
Royalty Pharma
RPRX
$26.1B
| $1.66M | ﹤0.01% |
54,800
-13,000
| -19% | -$383K |
|
2595
PUT
Ormat Technologies
ORA
$6.11B
| $1.66M | ﹤0.01% |
25,100
+5,200
| +26% | +$347K |
|
2596
Navios Maritime Partners
NMM
$2.25B
| $1.65M | ﹤0.01% |
38,775
+27,895
| +256% | +$935K |
|
2597
CALL
Asbury Automotive
ABG
$4.19B
| $1.65M | ﹤0.01% |
7,000
+4,200
| +150% | +$892K |
|
2598
PUT
Aramark
ARMK
$15B
| $1.65M | ﹤0.01% |
59,400
-1,600
| -3% | -$48.2K |
|
2599
CALL
Church & Dwight Co
CHD
$23.1B
| $1.65M | ﹤0.01% |
15,800
+10,900
| +222% | +$1.09M |
|
2600
PUT
Copa Holdings
CPA
$5.56B
| $1.65M | ﹤0.01% |
15,800
-8,200
| -34% | -$815K |
|
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.