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 | |
|---|---|---|---|---|---|---|
2551
CALL
Opendoor
OPEN
$3.69B
| $1.74M | ﹤0.01% |
592,927
-1,179,860
| -67% | -$3.68M |
|
|
PINC
2552
PUT
DELISTED
Premier
PINC
| $1.74M | ﹤0.01% |
78,600
+76,700
| +4,037% | +$1.66M |
|
2553
Stellantis
STLA
$16.5B
| $1.74M | ﹤0.01% |
+61,361
| New | +$1.53M |
|
2554
CALL
UGI
UGI
$8B
| $1.73M | ﹤0.01% |
70,700
+4,300
| +6% | +$103K |
|
2555
Western Alliance Bancorporation
WAL
$9.07B
| $1.73M | ﹤0.01% |
+27,028
| New | +$1.66M |
|
2556
CALL
MarketAxess Holdings
MKTX
$4.15B
| $1.73M | ﹤0.01% |
7,900
-5,300
| -40% | -$1.25M |
|
2557
CALL
Lamar Advertising Co
LAMR
$16.2B
| $1.73M | ﹤0.01% |
14,500
+13,800
| +1,971% | +$1.51M |
|
2558
Vanguard Information Technology ETF
VGT
$139B
| $1.73M | ﹤0.01% |
26,424
-29,552
| -53% | -$1.87M |
|
2559
CALL
Vaalco Energy
EGY
$594M
| $1.72M | ﹤0.01% |
247,100
-72,300
| -23% | -$339K |
|
2560
PUT
Beam Therapeutics
BEAM
$2.58B
| $1.72M | ﹤0.01% |
52,100
+43,900
| +535% | +$1.37M |
|
2561
CALL
Broadridge
BR
$17.2B
| $1.72M | ﹤0.01% |
8,400
+1,400
| +20% | +$282K |
|
2562
PUT
Starwood Property Trust
STWD
$6.12B
| $1.72M | ﹤0.01% |
84,400
+1,900
| +2% | +$38.5K |
|
2563
PUT
Alta Equipment Group
ALTG
$210M
| $1.71M | ﹤0.01% |
132,400
+87,500
| +195% | +$1.01M |
|
2564
PUT
Roivant Sciences
ROIV
$25.2B
| $1.71M | ﹤0.01% |
162,600
-251,300
| -61% | -$2.71M |
|
2565
Northrop Grumman
NOC
$77B
| $1.71M | ﹤0.01% |
+3,575
| New | +$1.65M |
|
|
RC
2566
PUT
Ready Capital
RC
$265M
| $1.71M | ﹤0.01% |
187,500
+172,900
| +1,184% | +$1.6M |
|
2567
Atmus Filtration Technologies
ATMU
$4.37B
| $1.71M | ﹤0.01% |
+52,990
| New | +$1.27M |
|
2568
PUT
Ocular Therapeutix
OCUL
$1.86B
| $1.71M | ﹤0.01% |
187,600
+120,900
| +181% | +$858K |
|
2569
CALL
Return Stacked Bonds & Managed Futures ETF
RSBT
$137M
| $1.7M | ﹤0.01% |
101,500
+94,500
| +1,350% | +$1.63M |
|
2570
CALL
Algoma Steel
ASTL
$455M
| $1.7M | ﹤0.01% |
200,500
+80,300
| +67% | +$678K |
|
2571
Murphy Oil
MUR
$5.58B
| $1.7M | ﹤0.01% |
37,242
-6,401
| -15% | -$258K |
|
|
MOMO
2572
CALL
Hello Group
MOMO
$869M
| $1.7M | ﹤0.01% |
273,700
+206,100
| +305% | +$1.31M |
|
2573
iShares Russell 2000 Value ETF
IWN
$14.4B
| $1.7M | ﹤0.01% |
+10,680
| New | +$1.62M |
|
2574
PUT
Lear
LEA
$7.19B
| $1.7M | ﹤0.01% |
11,700
+5,600
| +92% | +$766K |
|
2575
PUT
Masco
MAS
$16B
| $1.7M | ﹤0.01% |
21,500
+17,500
| +438% | +$1.26M |
|
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.