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 | |
|---|---|---|---|---|---|---|
3101
PUT
The Bancorp
TBBK
$2.8B
| $778K | ﹤0.01% |
14,800
+6,300
| +74% | +$345K |
|
3102
CALL
Aldeyra Therapeutics
ALDX
$95.3M
| $776K | ﹤0.01% |
155,700
+23,100
| +17% | +$119K |
|
|
CRON
3103
PUT
Cronos Group
CRON
$1.06B
| $775K | ﹤0.01% |
383,800
+45,300
| +13% | +$94.5K |
|
3104
The Honest Company
HNST
$424M
| $775K | ﹤0.01% |
111,917
+101,453
| +970% | +$574K |
|
3105
PUT
Melco Resorts & Entertainment
MLCO
$2.16B
| $775K | ﹤0.01% |
134,000
-8,400
| -6% | -$56.6K |
|
3106
CALL
ARK 21Shares Bitcoin ETF
ARKB
$2.47B
| $774K | ﹤0.01% |
+24,900
| New | +$688K |
|
|
SUM
3107
DELISTED
Summit Materials, Inc. Class A Common Stock
SUM
| $774K | ﹤0.01% |
15,301
+12,655
| +478% | +$591K |
|
3108
CALL
JFrog
FROG
$9.86B
| $773K | ﹤0.01% |
26,300
-2,700
| -9% | -$81.9K |
|
3109
Root
ROOT
$950M
| $773K | ﹤0.01% |
+10,654
| New | +$736K |
|
3110
PUT
Ocular Therapeutix
OCUL
$1.89B
| $772K | ﹤0.01% |
90,500
+50,000
| +123% | +$488K |
|
3111
CALL
SiTime
SITM
$15.7B
| $772K | ﹤0.01% |
3,600
+2,700
| +300% | +$550K |
|
3112
Wintrust Financial
WTFC
$10.8B
| $772K | ﹤0.01% |
+6,196
| New | +$765K |
|
|
BECN
3113
CALL
DELISTED
Beacon Roofing Supply, Inc.
BECN
| $772K | ﹤0.01% |
7,600
+2,900
| +62% | +$292K |
|
|
VRNT
3114
CALL
DELISTED
Verint Systems
VRNT
| $771K | ﹤0.01% |
28,100
+21,400
| +319% | +$535K |
|
3115
EVgo
EVGO
$217M
| $770K | ﹤0.01% |
190,272
-1,541
| -0.8% | -$9.8K |
|
3116
PUT
Genuine Parts
GPC
$17.7B
| $770K | ﹤0.01% |
6,600
+3,100
| +89% | +$387K |
|
|
VRNA
3117
PUT
DELISTED
Verona Pharma
VRNA
| $770K | ﹤0.01% |
16,600
-138,100
| -89% | -$5.18M |
|
3118
CALL
United States Copper Index Fund
CPER
$750M
| $769K | ﹤0.01% |
30,600
-47,000
| -61% | -$1.26M |
|
3119
PUT
Levi Strauss
LEVI
$9.78B
| $769K | ﹤0.01% |
44,500
-16,700
| -27% | -$296K |
|
|
NKLA
3120
DELISTED
Nikola Corporation Common Stock
NKLA
| $769K | ﹤0.01% |
+646,921
| New | +$1.85M |
|
3121
CALL
Factset
FDS
$9.39B
| $768K | ﹤0.01% |
1,600
+700
| +78% | +$333K |
|
3122
CALL
Argan
AGX
$7.57B
| $767K | ﹤0.01% |
5,600
+5,500
| +5,500% | +$756K |
|
3123
PUT
Philips
PHG
$24.3B
| $764K | ﹤0.01% |
32,646
-43,673
| -57% | -$1.13M |
|
3124
PUT
Host Hotels & Resorts
HST
$17B
| $763K | ﹤0.01% |
43,600
+15,800
| +57% | +$284K |
|
3125
CALL
IES Holdings
IESC
$12B
| $763K | ﹤0.01% |
3,800
+500
| +15% | +$120K |
|
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.