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 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1726
CALL
uniQure
QURE
$2.68B
| $3.54M | ﹤0.01% |
200,400
+189,200
| +1,689% | +$1.63M |
|
1727
CALL
Intellia Therapeutics
NTLA
$1.5B
| $3.52M | ﹤0.01% |
302,300
+268,400
| +792% | +$4.19M |
|
1728
PUT
Qorvo
QRVO
$7.63B
| $3.52M | ﹤0.01% |
50,400
+39,000
| +342% | +$3.12M |
|
1729
PUT
Vodafone
VOD
$34.9B
| $3.52M | ﹤0.01% |
414,800
-521,300
| -56% | -$4.75M |
|
1730
CALL
Moody's
MCO
$81.7B
| $3.5M | ﹤0.01% |
7,400
+800
| +12% | +$382K |
|
1731
CALL
Emcor
EME
$33.1B
| $3.5M | ﹤0.01% |
7,700
-15,900
| -67% | -$7.52M |
|
1732
PUT
Aurora
AUR
$11.7B
| $3.49M | ﹤0.01% |
553,900
+44,900
| +9% | +$281K |
|
1733
CALL
Virtu Financial
VIRT
$5.2B
| $3.49M | ﹤0.01% |
97,800
+5,000
| +5% | +$172K |
|
1734
Dave & Buster's
PLAY
$343M
| $3.49M | ﹤0.01% |
119,523
+113,533
| +1,895% | +$3.95M |
|
1735
PUT
Booz Allen Hamilton
BAH
$8.7B
| $3.49M | ﹤0.01% |
27,100
+26,500
| +4,417% | +$4.12M |
|
1736
CALL
Alphatec Holdings
ATEC
$1.27B
| $3.47M | ﹤0.01% |
377,600
+284,700
| +306% | +$2.27M |
|
1737
PUT
Goodyear
GT
$2.07B
| $3.46M | ﹤0.01% |
384,900
+142,200
| +59% | +$1.3M |
|
1738
CALL
Bank OZK
OZK
$5.49B
| $3.46M | ﹤0.01% |
77,600
-43,700
| -36% | -$2M |
|
1739
Pinterest
PINS
$12.4B
| $3.45M | ﹤0.01% |
119,130
-243,000
| -67% | -$7.64M |
|
|
SMAR
1740
CALL
DELISTED
Smartsheet Inc.
SMAR
| $3.44M | ﹤0.01% |
61,500
-129,800
| -68% | -$7.26M |
|
1741
NRG Energy
NRG
$29.8B
| $3.44M | ﹤0.01% |
+38,151
| New | +$3.53M |
|
|
VSXY
1742
PUT
Victoria's Secret
VSXY
$6.64B
| $3.44M | ﹤0.01% |
83,000
-16,400
| -16% | -$579K |
|
|
ACB
1743
PUT
Aurora Cannabis
ACB
$165M
| $3.43M | ﹤0.01% |
808,200
-5,800
| -0.7% | -$28.5K |
|
1744
PUT
Murphy Oil
MUR
$5.58B
| $3.43M | ﹤0.01% |
113,500
+61,600
| +119% | +$1.98M |
|
1745
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
$293M
| $3.43M | ﹤0.01% |
93,671
+89,121
| +1,959% | +$3M |
|
1746
CALL
Flex
FLEX
$43.4B
| $3.42M | ﹤0.01% |
91,400
+39,400
| +76% | +$1.46M |
|
1747
Micron Technology
MU
$1.04T
| $3.42M | ﹤0.01% |
40,676
-61,371
| -60% | -$6.24M |
|
1748
CALL
Pagaya Technologies
PGY
$1.32B
| $3.42M | ﹤0.01% |
368,500
+16,100
| +5% | +$170K |
|
1749
PUT
UGI
UGI
$8B
| $3.42M | ﹤0.01% |
121,100
+79,900
| +194% | +$2.07M |
|
1750
PUT
FirstEnergy
FE
$28.9B
| $3.41M | ﹤0.01% |
85,700
+29,800
| +53% | +$1.25M |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.