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 | |
|---|---|---|---|---|---|---|
6526
ProShares UltraShort Gold
GLL
$127M
| $24K | ﹤0.01% |
345
+295
| +590% | +$20.1K |
|
6527
PUT
Gray Television
GTN
$415M
| $24K | ﹤0.01% |
7,700
-17,900
| -70% | -$83.6K |
|
6528
Intrepid Potash
IPI
$456M
| $24K | ﹤0.01% |
1,133
-1,196
| -51% | -$30.1K |
|
6529
Liberty Global Class C
LBTYK
$3.53B
| $24K | ﹤0.01% |
+1,848
| New | +$31.9K |
|
6530
PUT
Mitek Systems
MITK
$754M
| $24K | ﹤0.01% |
2,200
+2,000
| +1,000% | +$18.7K |
|
6531
MillerKnoll
MLKN
$1.53B
| $24K | ﹤0.01% |
+1,071
| New | +$25.9K |
|
|
MTA
6532
Metalla Royalty & Streaming
MTA
$688M
| $24K | ﹤0.01% |
9,658
+6,037
| +167% | +$19.2K |
|
6533
PUT
NET Power
NPWR
$126M
| $24K | ﹤0.01% |
2,300
+1,900
| +475% | +$18.6K |
|
6534
PUT
Nurix Therapeutics
NRIX
$2.41B
| $24K | ﹤0.01% |
+1,300
| New | +$29.8K |
|
6535
NetSol Technologies
NTWK
$51.2M
| $24K | ﹤0.01% |
9,221
+894
| +11% | +$2.57K |
|
6536
CALL
Patrick Industries
PATK
$2.74B
| $24K | ﹤0.01% |
300
| – | – |
|
6537
Petrobras Class A
PBR.A
$111B
| $24K | ﹤0.01% |
+2,031
| New | +$26.1K |
|
6538
VanEck Preferred Securities ex Financials ETF
PFXF
$2.41B
| $24K | ﹤0.01% |
1,421
+1,015
| +250% | +$18.3K |
|
|
PKST
6539
DELISTED
Peakstone Realty Trust
PKST
| $24K | ﹤0.01% |
2,232
+374
| +20% | +$4.88K |
|
6540
CALL
Quad
QUAD
$536M
| $24K | ﹤0.01% |
3,500
-38,000
| -92% | -$257K |
|
6541
RPC Inc
RES
$1.24B
| $24K | ﹤0.01% |
4,186
+4,096
| +4,551% | +$25.4K |
|
|
RPTX
6542
DELISTED
Repare Therapeutics
RPTX
| $24K | ﹤0.01% |
18,359
+16,111
| +717% | +$48K |
|
6543
CALL
Sun Communities
SUI
$15.2B
| $24K | ﹤0.01% |
200
-116,800
| -100% | -$15M |
|
6544
PUT
Teradata
TDC
$2.92B
| $24K | ﹤0.01% |
800
-2,700
| -77% | -$84.5K |
|
6545
PUT
UFP Technologies
UFPT
$1.97B
| $24K | ﹤0.01% |
100
-700
| -88% | -$204K |
|
|
GGRP
6546
PUT
Glimpse Group
GGRP
$18.8M
| $24K | ﹤0.01% |
+9,800
| New | +$10.8K |
|
|
BTCL
6547
T-Rex 2X Long Bitcoin Daily Target ETF
BTCL
$21.8M
| $24K | ﹤0.01% |
504
+304
| +152% | +$13.2K |
|
|
SARO
6548
CALL
StandardAero Inc
SARO
$9.74B
| $24K | ﹤0.01% |
+1,000
| New | +$28.9K |
|
|
XELA
6549
DELISTED
Exela Technologies, Inc. Common Stock
XELA
| $24K | ﹤0.01% |
+22,402
| New | +$44K |
|
6550
Aegon
AEG
$14B
| $23K | ﹤0.01% |
3,905
-43,269
| -92% | -$271K |
|
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.