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 | |
|---|---|---|---|---|---|---|
3626
Delek US
DK
$3.95B
| $461K | ﹤0.01% |
+24,929
| New | +$447K |
|
3627
HighPeak Energy
HPK
$855M
| $461K | ﹤0.01% |
31,364
+15,910
| +103% | +$228K |
|
3628
CALL
Neurogene
NGNE
$691M
| $461K | ﹤0.01% |
+20,200
| New | +$752K |
|
|
ORC
3629
Orchid Island Capital
ORC
$1.3B
| $461K | ﹤0.01% |
59,265
+5,830
| +11% | +$45.8K |
|
3630
Ovintiv
OVV
$16.6B
| $461K | ﹤0.01% |
11,405
+18
| +0.2% | +$750 |
|
3631
PUT
TMC The Metals Company
TMC
$1.64B
| $461K | ﹤0.01% |
412,200
+48,500
| +13% | +$45.7K |
|
3632
State Street SPDR Bloomberg 1-3 Month T-Bill ETF
BIL
$47.1B
| $459K | ﹤0.01% |
5,028
+3,143
| +167% | +$288K |
|
|
ITOS
3633
PUT
DELISTED
iTeos Therapeutics
ITOS
| $459K | ﹤0.01% |
59,800
+58,800
| +5,880% | +$505K |
|
3634
State Street SPDR S&P Insurance ETF
KIE
$654M
| $459K | ﹤0.01% |
+8,138
| New | +$473K |
|
|
SLNO
3635
DELISTED
Soleno Therapeutics
SLNO
| $459K | ﹤0.01% |
+10,216
| New | +$529K |
|
|
KEEL
3636
PUT
Keel Infrastructure Corp
KEEL
$2.45B
| $458K | ﹤0.01% |
307,900
-76,100
| -20% | -$152K |
|
3637
CALL
Genco Shipping & Trading
GNK
$1.09B
| $458K | ﹤0.01% |
32,900
+26,700
| +431% | +$434K |
|
3638
CALL
Matsons
MATX
$6.22B
| $458K | ﹤0.01% |
3,400
+3,300
| +3,300% | +$481K |
|
3639
PUT
Tradeweb Markets
TW
$21.7B
| $458K | ﹤0.01% |
3,500
-34,400
| -91% | -$4.54M |
|
3640
Aurinia Pharmaceuticals
AUPH
$1.96B
| $457K | ﹤0.01% |
50,995
-180,272
| -78% | -$1.47M |
|
3641
Cipher Digital
CIFR
$8.86B
| $457K | ﹤0.01% |
98,508
-131,699
| -57% | -$748K |
|
3642
CALL
Krispy Kreme
DNUT
$562M
| $457K | ﹤0.01% |
46,100
+6,900
| +18% | +$74.7K |
|
3643
Comfort Systems
FIX
$60.9B
| $457K | ﹤0.01% |
1,080
-480
| -31% | -$211K |
|
3644
CALL
Oshkosh
OSK
$9.66B
| $456K | ﹤0.01% |
4,800
+1,600
| +50% | +$168K |
|
3645
CALL
WEX
WEX
$6.07B
| $455K | ﹤0.01% |
2,600
+400
| +18% | +$75K |
|
3646
CALL
Par Pacific Holdings
PARR
$3.94B
| $454K | ﹤0.01% |
27,700
+2,400
| +9% | +$40.5K |
|
3647
Corteva
CTVA
$58.6B
| $453K | ﹤0.01% |
+7,953
| New | +$470K |
|
3648
Opendoor
OPEN
$3.71B
| $453K | ﹤0.01% |
292,617
-529,649
| -64% | -$960K |
|
3649
PUT
Open Text
OTEX
$5.73B
| $453K | ﹤0.01% |
16,000
-17,700
| -53% | -$545K |
|
3650
CALL
Alignment Healthcare
ALHC
$3.86B
| $452K | ﹤0.01% |
40,200
+40,000
| +20,000% | +$468K |
|
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.