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 | |
|---|---|---|---|---|---|---|
3201
CALL
Kodiak Gas Services
KGS
$5.83B
| $763K | ﹤0.01% |
28,000
+22,400
| +400% | +$608K |
|
3202
PUT
New York Times
NYT
$11.7B
| $763K | ﹤0.01% |
14,900
-5,100
| -26% | -$240K |
|
3203
PUT
Shutterstock
SSTK
$216M
| $762K | ﹤0.01% |
19,700
+2,500
| +15% | +$102K |
|
3204
CALL
Webster Financial
WBS
$12.5B
| $762K | ﹤0.01% |
17,500
+1,100
| +7% | +$49K |
|
3205
CALL
Middleby
MIDD
$6.15B
| $760K | ﹤0.01% |
6,200
-33,000
| -84% | -$4.48M |
|
|
EQC
3206
PUT
DELISTED
Equity Commonwealth
EQC
| $760K | ﹤0.01% |
39,200
-2,400
| -6% | -$45.7K |
|
3207
PUT
Workiva
WK
$3.13B
| $759K | ﹤0.01% |
10,400
-6,200
| -37% | -$488K |
|
3208
CALL
Albertsons Companies
ACI
$5.57B
| $758K | ﹤0.01% |
38,400
-96,100
| -71% | -$1.96M |
|
3209
CALL
Greif
GEF
$4.56B
| $758K | ﹤0.01% |
13,200
+9,000
| +214% | +$568K |
|
3210
Leonardo DRS
DRS
$12.9B
| $757K | ﹤0.01% |
29,681
+14,309
| +93% | +$327K |
|
3211
PUT
IDT Corp
IDT
$1.63B
| $757K | ﹤0.01% |
21,100
-17,100
| -45% | -$643K |
|
3212
CALL
Crinetics Pharmaceuticals
CRNX
$8.87B
| $756K | ﹤0.01% |
16,900
-66,100
| -80% | -$3.05M |
|
3213
United States Natural Gas Fund
UNG
$458M
| $756K | ﹤0.01% |
43,410
-97,201
| -69% | -$1.67M |
|
3214
PUT
Euronet Worldwide
EEFT
$3.01B
| $755K | ﹤0.01% |
7,300
-300
| -4% | -$32.8K |
|
|
VRN
3215
CALL
DELISTED
Veren
VRN
| $755K | ﹤0.01% |
96,000
+22,500
| +31% | +$189K |
|
3216
PUT
Array Technologies
ARRY
$848M
| $754K | ﹤0.01% |
73,500
-73,800
| -50% | -$937K |
|
3217
CALL
Encompass Health
EHC
$11.3B
| $754K | ﹤0.01% |
8,800
+1,600
| +22% | +$134K |
|
3218
PUT
FerroAtlántica
GSM
$617M
| $754K | ﹤0.01% |
140,800
+55,100
| +64% | +$300K |
|
3219
Carriage Services
CSV
$635M
| $753K | ﹤0.01% |
28,076
+27,151
| +2,935% | +$712K |
|
|
HIMX
3220
Himax Technologies
HIMX
$2.22B
| $753K | ﹤0.01% |
94,876
-14,832
| -14% | -$90.8K |
|
3221
CALL
indie Semiconductor
INDI
$727M
| $753K | ﹤0.01% |
122,100
+44,100
| +57% | +$280K |
|
3222
PUT
Park Hotels & Resorts
PK
$3.03B
| $753K | ﹤0.01% |
50,300
+45,200
| +886% | +$723K |
|
3223
PUT
Yelp
YELP
$1.45B
| $753K | ﹤0.01% |
20,400
-15,700
| -43% | -$601K |
|
3224
PUT
Icon
ICLR
$13B
| $752K | ﹤0.01% |
2,400
-32,300
| -93% | -$10.1M |
|
3225
PUT
Natural Resource Partners
NRP
$1.3B
| $752K | ﹤0.01% |
8,400
-800
| -9% | -$72.2K |
|
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.