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 | |
|---|---|---|---|---|---|---|
5101
KB Home
KBH
$3.45B
| $129K | ﹤0.01% |
+1,849
| New | +$126K |
|
5102
CALL
Leslie's
LESL
$8.12M
| $129K | ﹤0.01% |
1,540
-640
| -29% | -$62.2K |
|
5103
CALL
Ocugen
OCGN
$427M
| $129K | ﹤0.01% |
83,600
-43,700
| -34% | -$68.1K |
|
5104
CALL
Ocular Therapeutix
OCUL
$1.85B
| $129K | ﹤0.01% |
19,000
-35,800
| -65% | -$221K |
|
5105
CALL
OneWater Marine
ONEW
$206M
| $129K | ﹤0.01% |
4,700
+200
| +4% | +$5.15K |
|
5106
CALL
Phinia Inc
PHIN
$2.7B
| $129K | ﹤0.01% |
3,300
-7,400
| -69% | -$305K |
|
|
PVBC
5107
DELISTED
Provident Bancorp
PVBC
| $129K | ﹤0.01% |
12,717
+11,606
| +1,045% | +$107K |
|
5108
CALL
Rackspace Technology
RXT
$1.07B
| $129K | ﹤0.01% |
43,500
-2,900
| -6% | -$5.82K |
|
5109
CALL
Alta Equipment Group
ALTG
$197M
| $128K | ﹤0.01% |
16,000
+12,300
| +332% | +$124K |
|
5110
CALL
Backblaze
BLZE
$758M
| $128K | ﹤0.01% |
20,800
-17,900
| -46% | -$140K |
|
5111
PUT
Coherus Oncology
CHRS
$227M
| $128K | ﹤0.01% |
74,000
+54,500
| +279% | +$110K |
|
|
DSL
5112
CALL
DoubleLine Income Solutions Fund
DSL
$1.23B
| $128K | ﹤0.01% |
10,300
+5,400
| +110% | +$67.2K |
|
5113
CALL
Global Net Lease
GNL
$1.86B
| $128K | ﹤0.01% |
17,500
-1,500
| -8% | -$10.9K |
|
5114
PUT
Garrett Motion
GTX
$5.78B
| $128K | ﹤0.01% |
15,000
-14,700
| -49% | -$136K |
|
5115
Marqeta
MQ
$1.86B
| $128K | ﹤0.01% |
5,879
-1,609
| -21% | -$35.4K |
|
|
NUVL
5116
PUT
DELISTED
Nuvalent
NUVL
| $128K | ﹤0.01% |
+1,700
| New | +$121K |
|
|
PRO
5117
CALL
DELISTED
PROS Holdings
PRO
| $128K | ﹤0.01% |
4,500
-5,300
| -54% | -$168K |
|
5118
CALL
Revolve Group
RVLV
$1.82B
| $128K | ﹤0.01% |
8,100
-1,100
| -12% | -$21.1K |
|
5119
ProShares UltraShort Russell2000
TWM
$43.8M
| $128K | ﹤0.01% |
2,296
+580
| +34% | +$33.1K |
|
5120
CALL
Twist Bioscience
TWST
$5.69B
| $128K | ﹤0.01% |
2,600
-3,100
| -54% | -$126K |
|
5121
PUT
Textron
TXT
$15B
| $128K | ﹤0.01% |
1,500
-73,200
| -98% | -$6.52M |
|
5122
Delcath Systems
DCTH
$416M
| $127K | ﹤0.01% |
15,279
+4,342
| +40% | +$27.5K |
|
5123
CALL
Editas Medicine
EDIT
$413M
| $127K | ﹤0.01% |
27,200
-78,700
| -74% | -$444K |
|
5124
Gartner
IT
$10.2B
| $127K | ﹤0.01% |
+285
| New | +$127K |
|
5125
Lamar Advertising Co
LAMR
$16.3B
| $127K | ﹤0.01% |
1,068
-16,429
| -94% | -$1.91M |
|
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.