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 | |
|---|---|---|---|---|---|---|
3426
CALL
Customers Bancorp
CUBI
$2.66B
| $550K | ﹤0.01% |
11,300
+10,400
| +1,156% | +$523K |
|
3427
CALL
CryoPort
CYRX
$764M
| $550K | ﹤0.01% |
70,700
-10,300
| -13% | -$76.8K |
|
3428
PUT
Visteon
VC
$2.82B
| $550K | ﹤0.01% |
6,200
+5,500
| +786% | +$503K |
|
3429
CALL
Blink Charging
BLNK
$79.5M
| $549K | ﹤0.01% |
395,100
-24,100
| -6% | -$42.6K |
|
3430
PUT
BorgWarner
BWA
$13.1B
| $549K | ﹤0.01% |
17,300
-3,900
| -18% | -$133K |
|
3431
HEICO Corp
HEI
$49.9B
| $549K | ﹤0.01% |
+2,312
| New | +$599K |
|
3432
CALL
Mitek Systems
MITK
$768M
| $549K | ﹤0.01% |
49,400
+42,000
| +568% | +$392K |
|
3433
PUT
Remitly
RELY
$4.77B
| $548K | ﹤0.01% |
24,300
+16,500
| +212% | +$304K |
|
3434
PUT
Equitable Holdings
EQH
$13.3B
| $547K | ﹤0.01% |
11,600
-60,900
| -84% | -$2.81M |
|
3435
KeyCorp
KEY
$24.1B
| $547K | ﹤0.01% |
31,918
+11,623
| +57% | +$209K |
|
3436
CALL
U-Haul Holding Co Series N
UHAL.B
$12.5B
| $545K | ﹤0.01% |
+7,900
| New | +$519K |
|
3437
Healthpeak Properties
DOC
$15.5B
| $544K | ﹤0.01% |
26,853
+8,615
| +47% | +$187K |
|
3438
CALL
Ero Copper
ERO
$2.73B
| $544K | ﹤0.01% |
40,400
-500
| -1% | -$8.47K |
|
3439
PUT
Vivid Seats
SEAT
$84.8M
| $544K | ﹤0.01% |
5,885
-4,415
| -43% | -$329K |
|
3440
CALL
SELLAS Life Sciences
SLS
$2.13B
| $542K | ﹤0.01% |
521,800
-147,800
| -22% | -$169K |
|
3441
PUT
Barnes & Noble Education
BNED
$445M
| $541K | ﹤0.01% |
+267,600
| New | +$2.74M |
|
3442
CALL
Corporacion America
CAAP
$4.28B
| $541K | ﹤0.01% |
29,000
+6,700
| +30% | +$126K |
|
3443
PUT
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.91B
| $541K | ﹤0.01% |
20,200
-41,600
| -67% | -$1.3M |
|
3444
CALL
LSB Industries
LXU
$824M
| $541K | ﹤0.01% |
71,400
+42,100
| +144% | +$362K |
|
3445
PUT
Public Service Enterprise Group
PEG
$39.5B
| $540K | ﹤0.01% |
6,400
-64,900
| -91% | -$5.74M |
|
3446
PUT
Park Hotels & Resorts
PK
$3.03B
| $540K | ﹤0.01% |
38,400
-12,300
| -24% | -$181K |
|
3447
CALL
BGC Group
BGC
$5.65B
| $539K | ﹤0.01% |
59,600
+59,100
| +11,820% | +$569K |
|
3448
Republic Services
RSG
$66.7B
| $539K | ﹤0.01% |
+2,680
| New | +$555K |
|
3449
Elanco Animal Health
ELAN
$12.7B
| $538K | ﹤0.01% |
44,439
-210,903
| -83% | -$2.76M |
|
3450
PUT
Houlihan Lokey
HLI
$9.75B
| $538K | ﹤0.01% |
+3,100
| New | +$546K |
|
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.