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 | |
|---|---|---|---|---|---|---|
7301
Minerals Technologies
MTX
$2.29B
| $12K | ﹤0.01% |
+155
| New | +$12.3K |
|
7302
NB Bancorp
NBBK
$983M
| $12K | ﹤0.01% |
+832
| New | +$12.1K |
|
7303
Noodles & Co
NDLS
$85M
| $12K | ﹤0.01% |
1,019
+393
| +63% | +$5.61K |
|
7304
PUT
Old National Bancorp
ONB
$10.1B
| $12K | ﹤0.01% |
700
+200
| +40% | +$3.32K |
|
|
ONL
7305
Orion Office REIT
ONL
$150M
| $12K | ﹤0.01% |
3,550
-17,534
| -83% | -$60K |
|
|
ONTF
7306
CALL
DELISTED
ON24
ONTF
| $12K | ﹤0.01% |
2,000
-5,500
| -73% | -$34.9K |
|
7307
CALL
Paysign
PAYS
$497M
| $12K | ﹤0.01% |
3,000
-5,500
| -65% | -$24.3K |
|
7308
CALL
Precigen
PGEN
$1.93B
| $12K | ﹤0.01% |
7,700
-100
| -1% | -$145 |
|
7309
CALL
Purple Innovation
PRPL
$35.8M
| $12K | ﹤0.01% |
476
+280
| +143% | +$9.85K |
|
|
PRPH
7310
PUT
DELISTED
ProPhase Labs
PRPH
| $12K | ﹤0.01% |
+310
| New | +$16.2K |
|
|
RAPT
7311
PUT
DELISTED
RAPT Therapeutics
RAPT
| $12K | ﹤0.01% |
525
-29,000
| -98% | -$1.34M |
|
|
RDUS
7312
CALL
DELISTED
Radius Recycling
RDUS
| $12K | ﹤0.01% |
800
-800
| -50% | -$14K |
|
7313
PUT
Rigetti Computing
RGTI
$5.2B
| $12K | ﹤0.01% |
11,300
-101,100
| -90% | -$117K |
|
7314
PUT
Rogers Corp
ROG
$2.31B
| $12K | ﹤0.01% |
100
-400
| -80% | -$46.9K |
|
|
RPTX
7315
DELISTED
Repare Therapeutics
RPTX
| $12K | ﹤0.01% |
3,924
-1,353
| -26% | -$4.83K |
|
|
RPTX
7316
PUT
DELISTED
Repare Therapeutics
RPTX
| $12K | ﹤0.01% |
3,900
+100
| +3% | +$357 |
|
7317
Smith Micro Software
SMSI
$14.1M
| $12K | ﹤0.01% |
1,131
+235
| +26% | +$2.76K |
|
7318
PUT
Spire
SR
$4.87B
| $12K | ﹤0.01% |
+200
| New | +$12.1K |
|
7319
CALL
SS&C Technologies
SSNC
$18.1B
| $12K | ﹤0.01% |
200
-4,200
| -95% | -$261K |
|
7320
PUT
Sun Communities
SUI
$15B
| $12K | ﹤0.01% |
+100
| New | +$11.9K |
|
7321
PUT
SunCoke Energy
SXC
$765M
| $12K | ﹤0.01% |
1,300
+100
| +8% | +$1.03K |
|
7322
PUT
Theravance Biopharma
TBPH
$874M
| $12K | ﹤0.01% |
1,500
+1,300
| +650% | +$11.7K |
|
|
TSE
7323
DELISTED
Trinseo
TSE
| $12K | ﹤0.01% |
5,543
+5,384
| +3,386% | +$16.8K |
|
7324
CALL
US Commodity Index
USCI
$365M
| $12K | ﹤0.01% |
200
-200
| -50% | -$12.5K |
|
7325
CALL
United States 12 Month Oil Fund,
USL
$44.8M
| $12K | ﹤0.01% |
300
| – | – |
|
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.