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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
MGIC
4601
DELISTED
Magic Software Enterprises
MGIC
| $210K | ﹤0.01% |
21,866
+3,129
| +17% | +$35.2K |
|
4602
CALL
Select Water Solutions
WTTR
$2.22B
| $210K | ﹤0.01% |
19,700
+18,100
| +1,131% | +$179K |
|
4603
YPF
YPF
$19.7B
| $210K | ﹤0.01% |
10,481
-88,794
| -89% | -$1.91M |
|
|
RVNC
4604
PUT
DELISTED
Revance Therapeutics, Inc.
RVNC
| $210K | ﹤0.01% |
82,000
+5,800
| +8% | +$19.8K |
|
4605
DocGo
DCGO
$64.2M
| $209K | ﹤0.01% |
67,684
+55,965
| +478% | +$184K |
|
|
NINE
4606
DELISTED
Nine Energy Service
NINE
| $209K | ﹤0.01% |
124,659
+112,242
| +904% | +$227K |
|
|
PSTL
4607
CALL
Postal Realty Trust
PSTL
$703M
| $209K | ﹤0.01% |
15,700
-400
| -2% | -$5.43K |
|
4608
CALL
Snap-on
SNA
$21.5B
| $209K | ﹤0.01% |
800
-3,500
| -81% | -$961K |
|
4609
Vermilion Energy
VET
$1.66B
| $209K | ﹤0.01% |
+19,012
| New | +$226K |
|
4610
CALL
Woodward
WWD
$23B
| $209K | ﹤0.01% |
1,200
-3,700
| -76% | -$630K |
|
4611
CALL
Nordson
NDSN
$16.4B
| $208K | ﹤0.01% |
900
-700
| -44% | -$176K |
|
4612
CALL
Teekay
TK
$996M
| $208K | ﹤0.01% |
23,200
+12,100
| +109% | +$102K |
|
4613
Build-A-Bear
BBW
$445M
| $207K | ﹤0.01% |
8,231
-14,200
| -63% | -$400K |
|
4614
PUT
M/I Homes
MHO
$3.95B
| $207K | ﹤0.01% |
1,700
-2,600
| -60% | -$318K |
|
|
MRUS
4615
PUT
DELISTED
Merus
MRUS
| $207K | ﹤0.01% |
3,500
-1,100
| -24% | -$53.3K |
|
4616
CALL
SurgePays
SURG
$5.9M
| $207K | ﹤0.01% |
64,900
-9,000
| -12% | -$34K |
|
|
UROY
4617
PUT
Uranium Royalty Corp
UROY
$478M
| $207K | ﹤0.01% |
92,100
+75,800
| +465% | +$188K |
|
4618
CALL
1stdibs.com
DIBS
$148M
| $206K | ﹤0.01% |
46,100
+45,700
| +11,425% | +$250K |
|
4619
PUT
Eos Energy Enterprises
EOSE
$1.14B
| $206K | ﹤0.01% |
162,400
-24,300
| -13% | -$20.1K |
|
4620
CALL
American Century Diversified Corporate Bond ETF
KORP
$869M
| $206K | ﹤0.01% |
2,400
+1,300
| +118% | +$59.4K |
|
4621
CALL
TIM SA
TIMB
$9.1B
| $206K | ﹤0.01% |
14,400
+13,700
| +1,957% | +$223K |
|
4622
Atomera
ATOM
$173M
| $205K | ﹤0.01% |
53,888
+3,209
| +6% | +$15.1K |
|
|
DX
4623
CALL
Dynex Capital
DX
$3.17B
| $205K | ﹤0.01% |
17,200
-29,600
| -63% | -$356K |
|
4624
Medpace
MEDP
$16.3B
| $205K | ﹤0.01% |
498
-2,580
| -84% | -$1.02M |
|
|
4625
PUT
Medpace
MEDP
$16.3B
| $205K | ﹤0.01% |
500
-8,200
| -94% | -$3.25M |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.