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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5151
iShares US Medical Devices ETF
IHI
$3.14B
| $94K | ﹤0.01% |
1,669
-6,906
| -81% | -$380K |
|
5152
CALL
TriNet
TNET
$3.29B
| $94K | ﹤0.01% |
+1,000
| New | +$91K |
|
5153
ProShares VIX Short-Term Futures ETF
VIXY
$206M
| $94K | ﹤0.01% |
+943
| New | +$134K |
|
|
VRNT
5154
PUT
DELISTED
Verint Systems
VRNT
| $94K | ﹤0.01% |
2,700
-11,100
| -80% | -$400K |
|
|
ZUO
5155
CALL
DELISTED
Zuora, Inc.
ZUO
| $94K | ﹤0.01% |
8,600
-6,800
| -44% | -$64.4K |
|
|
GRTS
5156
CALL
DELISTED
Gritstone bio, Inc. Common Stock
GRTS
| $94K | ﹤0.01% |
48,300
+40,400
| +511% | +$94.6K |
|
5157
PUT
ABM Industries
ABM
$2.79B
| $93K | ﹤0.01% |
2,200
-2,100
| -49% | -$91K |
|
|
AEVA
5158
CALL
Aeva Technologies
AEVA
$1.13B
| $93K | ﹤0.01% |
14,920
-1,040
| -7% | -$5.93K |
|
|
GOLD
5159
PUT
Gold.com Inc
GOLD
$1.22B
| $93K | ﹤0.01% |
2,500
-500
| -17% | -$18.1K |
|
5160
Cinemark Holdings
CNK
$4.22B
| $93K | ﹤0.01% |
5,646
-26,795
| -83% | -$445K |
|
5161
PUT
Warrior Met Coal
HCC
$4.25B
| $93K | ﹤0.01% |
2,400
-3,100
| -56% | -$112K |
|
5162
Hagerty
HGTY
$1.17B
| $93K | ﹤0.01% |
10,032
+437
| +5% | +$4.03K |
|
|
LX
5163
CALL
LexinFintech Holdings
LX
$246M
| $93K | ﹤0.01% |
40,800
+1,200
| +3% | +$2.91K |
|
|
MAG
5164
DELISTED
MAG Silver
MAG
| $93K | ﹤0.01% |
8,398
-40,296
| -83% | -$502K |
|
5165
PLAYSTUDIOS Inc
MYPS
$76.3M
| $93K | ﹤0.01% |
18,990
+8,544
| +82% | +$37.4K |
|
5166
PUT
Nabors Industries
NBR
$1.22B
| $93K | ﹤0.01% |
1,000
-7,500
| -88% | -$762K |
|
|
NEXN
5167
PUT
Nexxen International
NEXN
$584M
| $93K | ﹤0.01% |
13,000
-4,400
| -25% | -$27K |
|
5168
Red Robin
RRGB
$144M
| $93K | ﹤0.01% |
6,751
+1,724
| +34% | +$23.1K |
|
5169
PUT
VirnetX Holding Corp
VHC
$54.7M
| $93K | ﹤0.01% |
10,010
-620
| -6% | -$7.62K |
|
5170
PUT
Zeta Global
ZETA
$5.33B
| $93K | ﹤0.01% |
11,000
-6,200
| -36% | -$56.7K |
|
|
WHWK
5171
CALL
Whitehawk Therapeutics
WHWK
$190M
| $93K | ﹤0.01% |
13,600
+12,900
| +1,843% | +$100K |
|
|
CGC
5172
Canopy Growth
CGC
$388M
| $92K | ﹤0.01% |
23,915
+10,207
| +74% | +$107K |
|
5173
CALL
Emcor
EME
$35.7B
| $92K | ﹤0.01% |
500
-1,000
| -67% | -$167K |
|
|
TDAY
5174
CALL
USA Today Co
TDAY
$1.28B
| $92K | ﹤0.01% |
41,300
+4,000
| +11% | +$7.98K |
|
5175
CALL
Fusion Fuel Green
HTOO
$8.57M
| $92K | ﹤0.01% |
1,029
-1,551
| -60% | -$159K |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.