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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
AZEK
2326
CALL
DELISTED
The AZEK Co
AZEK
| $2.17M | ﹤0.01% |
43,300
+11,600
| +37% | +$505K |
|
|
COOP
2327
PUT
DELISTED
Mr. Cooper
COOP
| $2.17M | ﹤0.01% |
27,900
-62,000
| -69% | -$4.32M |
|
2328
PUT
Reliance Steel & Aluminium
RS
$20.8B
| $2.17M | ﹤0.01% |
6,500
+1,000
| +18% | +$304K |
|
2329
PUT
MarketAxess Holdings
MKTX
$4.15B
| $2.17M | ﹤0.01% |
9,900
+1,900
| +24% | +$449K |
|
2330
CALL
Oshkosh
OSK
$9.67B
| $2.17M | ﹤0.01% |
17,400
+13,800
| +383% | +$1.54M |
|
2331
CALL
Burford Capital
BUR
$907M
| $2.17M | ﹤0.01% |
135,700
-85,800
| -39% | -$1.27M |
|
|
RDFN
2332
CALL
DELISTED
Redfin
RDFN
| $2.17M | ﹤0.01% |
326,000
-67,300
| -17% | -$511K |
|
2333
iShares MSCI China ETF
MCHI
$6.04B
| $2.17M | ﹤0.01% |
54,535
+34,612
| +174% | +$1.34M |
|
2334
Cincinnati Financial
CINF
$28.3B
| $2.16M | ﹤0.01% |
+17,420
| New | +$1.97M |
|
|
ZIMV
2335
CALL
DELISTED
ZimVie
ZIMV
| $2.16M | ﹤0.01% |
131,100
+1,600
| +1% | +$28.5K |
|
2336
CALL
CVR Energy
CVI
$3.36B
| $2.16M | ﹤0.01% |
60,600
-19,100
| -24% | -$634K |
|
|
BLD
2337
CALL
DELISTED
TopBuild
BLD
| $2.16M | ﹤0.01% |
4,900
+3,400
| +227% | +$1.33M |
|
2338
PUT
AGNC Investment
AGNC
$12.3B
| $2.15M | ﹤0.01% |
217,300
-198,900
| -48% | -$1.92M |
|
2339
CALL
Cipher Digital
CIFR
$9.47B
| $2.15M | ﹤0.01% |
417,500
-137,500
| -25% | -$476K |
|
2340
Virtu Financial
VIRT
$5.2B
| $2.15M | ﹤0.01% |
104,804
+81,577
| +351% | +$1.5M |
|
2341
PUT
Eldorado Gold
EGO
$8.31B
| $2.15M | ﹤0.01% |
152,600
+118,300
| +345% | +$1.44M |
|
2342
CALL
Knight Transportation
KNX
$11.8B
| $2.15M | ﹤0.01% |
39,000
-32,000
| -45% | -$1.81M |
|
|
SKX
2343
CALL
DELISTED
Skechers
SKX
| $2.14M | ﹤0.01% |
35,000
-57,400
| -62% | -$3.5M |
|
2344
CALL
HF Sinclair
DINO
$15.9B
| $2.14M | ﹤0.01% |
35,500
-200
| -0.6% | -$11.4K |
|
2345
Hewlett Packard
HPE
$63.2B
| $2.14M | ﹤0.01% |
+120,911
| New | +$1.96M |
|
2346
CALL
Ramaco Resources Class A
METC
$676M
| $2.14M | ﹤0.01% |
131,266
+3,514
| +3% | +$62.3K |
|
2347
PUT
Fabrinet
FN
$17.1B
| $2.13M | ﹤0.01% |
11,300
+9,600
| +565% | +$1.93M |
|
2348
Kinross Gold
KGC
$28.5B
| $2.13M | ﹤0.01% |
348,304
+203,574
| +141% | +$1.11M |
|
|
CIVI
2349
CALL
DELISTED
Civitas Resources
CIVI
| $2.13M | ﹤0.01% |
28,100
+14,200
| +102% | +$950K |
|
2350
Bank of America
BAC
$435B
| $2.13M | ﹤0.01% |
56,235
-79,999
| -59% | -$2.75M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.