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 | |
|---|---|---|---|---|---|---|
4751
PUT
Yext
YEXT
$573M
| $182K | ﹤0.01% |
34,200
-117,500
| -77% | -$633K |
|
4752
PUT
GoPro
GPRO
$120M
| $181K | ﹤0.01% |
127,500
+92,000
| +259% | +$154K |
|
4753
Ceragon Networks
CRNT
$188M
| $180K | ﹤0.01% |
72,053
+67,100
| +1,355% | +$183K |
|
4754
CALL
Green Dot
GDOT
$750M
| $180K | ﹤0.01% |
19,100
+7,900
| +71% | +$73.5K |
|
4755
CALL
Regenxbio
RGNX
$616M
| $180K | ﹤0.01% |
15,400
+7,500
| +95% | +$117K |
|
4756
CALL
Rentokil
RTO
$14.8B
| $180K | ﹤0.01% |
6,100
-14,900
| -71% | -$413K |
|
4757
CALL
Atara Biotherapeutics
ATRA
$72.6M
| $179K | ﹤0.01% |
21,100
+20,244
| +2,365% | +$304K |
|
4758
CALL
Bally's
BALY
$708M
| $179K | ﹤0.01% |
15,000
-56,600
| -79% | -$724K |
|
|
CHX
4759
CALL
DELISTED
ChampionX
CHX
| $179K | ﹤0.01% |
5,400
-6,200
| -53% | -$211K |
|
4760
PUT
iShares S&P GSCI Commodity-Indexed Trust
GSG
$1B
| $179K | ﹤0.01% |
8,100
-2,200
| -21% | -$48.9K |
|
4761
CALL
Lands' End
LE
$378M
| $179K | ﹤0.01% |
13,200
-800
| -6% | -$10.8K |
|
4762
PUT
Olin
OLN
$2.53B
| $179K | ﹤0.01% |
3,800
-7,800
| -67% | -$417K |
|
4763
CALL
Sinclair Inc
SBGI
$1.02B
| $179K | ﹤0.01% |
13,500
-2,100
| -13% | -$26.9K |
|
4764
Shutterstock
SSTK
$209M
| $179K | ﹤0.01% |
4,646
+205
| +5% | +$8.33K |
|
|
VTYX
4765
PUT
DELISTED
Ventyx Biosciences
VTYX
| $179K | ﹤0.01% |
77,700
+69,000
| +793% | +$287K |
|
4766
PUT
IAMGOLD
IAG
$8.05B
| $178K | ﹤0.01% |
47,500
+8,200
| +21% | +$31.2K |
|
4767
Larimar Therapeutics
LRMR
$377M
| $178K | ﹤0.01% |
24,554
-36,346
| -60% | -$278K |
|
4768
CALL
Meritage Homes
MTH
$4.78B
| $178K | ﹤0.01% |
2,200
-4,800
| -69% | -$404K |
|
4769
CALL
Phreesia
PHR
$689M
| $178K | ﹤0.01% |
8,400
-4,200
| -33% | -$91.1K |
|
|
4770
PUT
Phreesia
PHR
$689M
| $178K | ﹤0.01% |
8,400
-2,200
| -21% | -$47.7K |
|
4771
UroGen Pharma
URGN
$1.97B
| $178K | ﹤0.01% |
10,619
+7,814
| +279% | +$111K |
|
4772
iShares MSCI USA Min Vol Factor ETF
USMV
$23.6B
| $178K | ﹤0.01% |
+2,123
| New | +$175K |
|
|
DESP
4773
PUT
DELISTED
Despegar.com
DESP
| $177K | ﹤0.01% |
13,400
-4,500
| -25% | -$59.3K |
|
4774
Equinor
EQNR
$97.3B
| $177K | ﹤0.01% |
+6,217
| New | +$173K |
|
4775
PUT
Global Partners
GLP
$1.65B
| $177K | ﹤0.01% |
3,900
-1,100
| -22% | -$50.8K |
|
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.