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 | |
|---|---|---|---|---|---|---|
4951
CALL
Ardagh Metal Packaging
AMBP
$2.96B
| $147K | ﹤0.01% |
43,300
+37,900
| +702% | +$143K |
|
|
DAWN
4952
CALL
DELISTED
Day One Biopharmaceuticals
DAWN
| $147K | ﹤0.01% |
10,700
-1,800
| -14% | -$26.3K |
|
4953
Dorchester Minerals
DMLP
$1.3B
| $147K | ﹤0.01% |
+4,795
| New | +$156K |
|
4954
CALL
Karyopharm Therapeutics
KPTI
$155M
| $147K | ﹤0.01% |
11,353
+9,600
| +548% | +$159K |
|
4955
CALL
PRA Group
PRAA
$672M
| $147K | ﹤0.01% |
7,500
-9,200
| -55% | -$212K |
|
|
RNAM
4956
CALL
DELISTED
Avidity Biosciences
RNAM
| $147K | ﹤0.01% |
3,600
-600
| -14% | -$17.2K |
|
4957
PUT
Teleflex
TFX
$5.96B
| $147K | ﹤0.01% |
700
-1,400
| -67% | -$293K |
|
4958
Voya Financial
VOYA
$8.96B
| $147K | ﹤0.01% |
+2,078
| New | +$150K |
|
|
AFMD
4959
CALL
DELISTED
Affimed
AFMD
| $146K | ﹤0.01% |
+26,900
| New | +$151K |
|
4960
PUT
AGCO
AGCO
$8.41B
| $146K | ﹤0.01% |
1,500
-27,300
| -95% | -$3.04M |
|
4961
PUT
Intuitive Machines
LUNR
$1.83B
| $146K | ﹤0.01% |
44,300
-48,700
| -52% | -$242K |
|
4962
CALL
Vera Bradley
VRA
$98.7M
| $146K | ﹤0.01% |
23,400
-15,200
| -39% | -$106K |
|
4963
CALL
West Fraser Timber
WFG
$5.21B
| $146K | ﹤0.01% |
1,900
+700
| +58% | +$55.6K |
|
4964
Aemetis
AMTX
$99.2M
| $145K | ﹤0.01% |
48,382
-9,678
| -17% | -$36.9K |
|
4965
CALL
Gossamer Bio
GOSS
$101M
| $145K | ﹤0.01% |
161,000
+41,600
| +35% | +$31.1K |
|
4966
CALL
Renaissance International IPO ETF
IPOS
$10.7M
| $145K | ﹤0.01% |
3,600
-3,400
| -49% | -$47.4K |
|
4967
PUT
Lloyds Banking Group
LYG
$85.2B
| $145K | ﹤0.01% |
53,200
+6,900
| +15% | +$18.5K |
|
4968
Mercury Systems
MRCY
$5.41B
| $145K | ﹤0.01% |
+5,386
| New | +$157K |
|
4969
PUT
Pacira BioSciences
PCRX
$1.04B
| $145K | ﹤0.01% |
5,100
-7,400
| -59% | -$211K |
|
|
PLL
4970
CALL
DELISTED
Piedmont Lithium
PLL
| $145K | ﹤0.01% |
14,600
-54,600
| -79% | -$697K |
|
4971
PUT
Syndax Pharmaceuticals
SNDX
$1.7B
| $145K | ﹤0.01% |
7,100
-9,300
| -57% | -$195K |
|
|
SBDS
4972
DELISTED
Solo Brands Inc
SBDS
| $145K | ﹤0.01% |
1,591
+108
| +7% | +$8.51K |
|
4973
PUT
Carlyle Group
CG
$16.1B
| $144K | ﹤0.01% |
3,600
-10,100
| -74% | -$436K |
|
4974
CALL
Genco Shipping & Trading
GNK
$1.1B
| $144K | ﹤0.01% |
6,800
-31,100
| -82% | -$669K |
|
4975
CALL
Roundhill Ball Metaverse ETF
METV
$212M
| $144K | ﹤0.01% |
11,000
+1,700
| +18% | +$21.1K |
|
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.