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 | |
|---|---|---|---|---|---|---|
4301
PUT
TETRA Technologies
TTI
$1.02B
| $284K | ﹤0.01% |
82,300
+46,700
| +131% | +$186K |
|
4302
PUT
Walker & Dunlop
WD
$1.75B
| $284K | ﹤0.01% |
2,900
+2,200
| +314% | +$209K |
|
4303
CALL
Achieve Life Sciences
ACHV
$627M
| $283K | ﹤0.01% |
60,300
-23,700
| -28% | -$114K |
|
4304
iShares MSCI Hong Kong ETF
EWH
$1.23B
| $283K | ﹤0.01% |
18,536
-7,423
| -29% | -$120K |
|
4305
CALL
Byrna Technologies
BYRN
$97.6M
| $282K | ﹤0.01% |
28,300
+22,400
| +380% | +$276K |
|
4306
Matador Resources
MTDR
$5.95B
| $282K | ﹤0.01% |
4,743
-18,412
| -80% | -$1.16M |
|
4307
Global X Artificial Intelligence & Technology ETF
AIQ
$8.94B
| $281K | ﹤0.01% |
7,899
-650
| -8% | -$22K |
|
4308
Paylocity
PCTY
$7.86B
| $281K | ﹤0.01% |
2,134
+887
| +71% | +$137K |
|
4309
CALL
Quest Resource Holding
QRHC
$28M
| $281K | ﹤0.01% |
32,000
-20,000
| -38% | -$184K |
|
4310
CALL
Honda
HMC
$39.9B
| $280K | ﹤0.01% |
8,700
+300
| +4% | +$10.2K |
|
4311
OptimizeRx
OPRX
$119M
| $280K | ﹤0.01% |
28,034
+22,676
| +423% | +$249K |
|
4312
CALL
Calix
CALX
$2.25B
| $279K | ﹤0.01% |
7,900
-4,200
| -35% | -$135K |
|
4313
PUT
NOV
NOV
$6.87B
| $279K | ﹤0.01% |
14,700
+8,300
| +130% | +$156K |
|
4314
PUT
A.O. Smith
AOS
$8.54B
| $278K | ﹤0.01% |
3,400
-1,200
| -26% | -$102K |
|
4315
PUT
Banco Bradesco
BBD
$37.5B
| $278K | ﹤0.01% |
124,500
-239,300
| -66% | -$619K |
|
|
CSW
4316
CSW Industrials
CSW
$4.51B
| $278K | ﹤0.01% |
1,048
+286
| +38% | +$70.9K |
|
|
ITOS
4317
PUT
DELISTED
iTeos Therapeutics
ITOS
| $278K | ﹤0.01% |
18,800
-3,600
| -16% | -$51.6K |
|
4318
PUT
abrdn Physical Silver Shares ETF
SIVR
$3.96B
| $278K | ﹤0.01% |
10,000
+1,700
| +20% | +$46.8K |
|
4319
Sportradar
SRAD
$4.41B
| $278K | ﹤0.01% |
24,915
-98,726
| -80% | -$1.03M |
|
4320
Devon Energy
DVN
$51.1B
| $277K | ﹤0.01% |
5,851
-26,867
| -82% | -$1.34M |
|
4321
PUT
EVgo
EVGO
$223M
| $276K | ﹤0.01% |
112,800
+51,700
| +85% | +$106K |
|
4322
SSR Mining
SSRM
$5.08B
| $276K | ﹤0.01% |
+61,271
| New | +$314K |
|
4323
CALL
Arcturus Therapeutics
ARCT
$160M
| $275K | ﹤0.01% |
11,300
-3,000
| -21% | -$91K |
|
4324
Innoviz Technologies
INVZ
$95.4M
| $275K | ﹤0.01% |
297,209
+226,532
| +321% | +$254K |
|
4325
iShares National Muni Bond ETF
MUB
$45.3B
| $275K | ﹤0.01% |
+2,583
| New | +$275K |
|
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.