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 | |
|---|---|---|---|---|---|---|
|
BPMC
2626
PUT
DELISTED
Blueprint Medicines
BPMC
| $1.25M | ﹤0.01% |
14,400
-22,300
| -61% | -$2.04M |
|
|
NNDM
2627
PUT
Nano Dimension
NNDM
$309M
| $1.25M | ﹤0.01% |
506,200
-6,400
| -1% | -$14.7K |
|
2628
PUT
Brookfield
BN
$102B
| $1.25M | ﹤0.01% |
32,700
-5,700
| -15% | -$215K |
|
2629
PUT
Molina Healthcare
MOH
$10.3B
| $1.25M | ﹤0.01% |
4,300
-13,700
| -76% | -$4.23M |
|
|
ANSS
2630
CALL
DELISTED
Ansys
ANSS
| $1.25M | ﹤0.01% |
3,700
-2,000
| -35% | -$671K |
|
2631
PUT
Intellia Therapeutics
NTLA
$1.5B
| $1.25M | ﹤0.01% |
107,100
+3,500
| +3% | +$54.6K |
|
2632
CALL
Lattice Semiconductor
LSCC
$17.6B
| $1.25M | ﹤0.01% |
22,000
-11,600
| -35% | -$637K |
|
2633
CALL
Middleby
MIDD
$6.05B
| $1.25M | ﹤0.01% |
9,200
-700
| -7% | -$96.5K |
|
2634
Bausch + Lomb
BLCO
$5.77B
| $1.24M | ﹤0.01% |
68,852
+41,248
| +149% | +$805K |
|
2635
CALL
Blend Labs
BLND
$409M
| $1.24M | ﹤0.01% |
295,400
+243,300
| +467% | +$1.05M |
|
2636
CALL
QuinStreet
QNST
$870M
| $1.24M | ﹤0.01% |
53,900
-17,200
| -24% | -$362K |
|
2637
CALL
Winnebago Industries
WGO
$870M
| $1.24M | ﹤0.01% |
26,000
-82,000
| -76% | -$4.65M |
|
2638
CALL
NeoGenomics
NEO
$1.81B
| $1.24M | ﹤0.01% |
75,300
-14,700
| -16% | -$228K |
|
2639
PUT
Guardant Health
GH
$19.5B
| $1.24M | ﹤0.01% |
40,500
-12,300
| -23% | -$346K |
|
2640
CALL
BRC Group Holdings
RILY
$277M
| $1.24M | ﹤0.01% |
269,500
+130,800
| +94% | +$682K |
|
|
JKS
2641
CALL
JinkoSolar
JKS
$775M
| $1.24M | ﹤0.01% |
49,600
+8,300
| +20% | +$203K |
|
2642
PUT
Tower Semiconductor
TSEM
$26.4B
| $1.23M | ﹤0.01% |
23,900
-28,100
| -54% | -$1.32M |
|
2643
PUT
Chord Energy
CHRD
$7.79B
| $1.23M | ﹤0.01% |
12,400
+7,700
| +164% | +$968K |
|
|
GES
2644
CALL
DELISTED
Guess Inc
GES
| $1.23M | ﹤0.01% |
87,500
-134,100
| -61% | -$2.28M |
|
2645
Perrigo
PRGO
$1.4B
| $1.23M | ﹤0.01% |
47,787
+10,289
| +27% | +$270K |
|
2646
PUT
LKQ Corp
LKQ
$6.58B
| $1.23M | ﹤0.01% |
33,400
-23,800
| -42% | -$910K |
|
|
HOLX
2647
CALL
DELISTED
Hologic
HOLX
| $1.23M | ﹤0.01% |
17,000
-17,700
| -51% | -$1.38M |
|
|
FYBR
2648
PUT
DELISTED
Frontier Communications
FYBR
| $1.22M | ﹤0.01% |
35,200
-82,200
| -70% | -$2.88M |
|
2649
PUT
Global Ship Lease
GSL
$1.57B
| $1.22M | ﹤0.01% |
55,900
+2,400
| +4% | +$56K |
|
2650
PUT
Freshworks
FRSH
$2.84B
| $1.22M | ﹤0.01% |
75,300
+72,500
| +2,589% | +$1.03M |
|
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.