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
| 1 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$32.1M |
| 2 |
PARA
Paramount Global Class B
PARA
|
$23.3M |
| 3 |
Pinduoduo
PDD
|
$17.3M |
| 4 |
Pfizer
PFE
|
$16.8M |
| 5 |
American Airlines Group
AAL
|
$14.5M |
Top Sells
| 1 |
Amazon
AMZN
|
$64.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
$38.1M |
| 3 |
AutoZone
AZO
|
$32.2M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
$25.3M |
| 5 |
Apple
AAPL
|
$22.5M |
Sector Composition
| 1 | Technology | 20.25% |
| 2 | Consumer Discretionary | 15.22% |
| 3 | Healthcare | 10.03% |
| 4 | Financials | 9.2% |
| 5 | Industrials | 9.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
201
LendingClub
LC
$1.9B
| $2M | ﹤0.01% |
121,135
+96,496
| +392% | +$1.59M |
|
202
Paysafe
PSFE
$852M
| $2M | ﹤0.01% |
+12,339
| New | +$2M |
|
203
Chegg
CHGG
$179M
| $1.99M | ﹤0.01% |
+23,188
| New | +$1.99M |
|
204
Capri Holdings
CPRI
$2.58B
| $1.98M | ﹤0.01% |
38,872
-14,623
| -27% | -$746K |
|
205
Akero Therapeutics
AKRO
$3.61B
| $1.97M | ﹤0.01% |
+68,063
| New | +$1.97M |
|
206
GMS Inc
GMS
| $1.97M | ﹤0.01% |
47,289
+46,574
| +6,514% | +$1.94M |
|
207
Halliburton
HAL
$19B
| $1.96M | ﹤0.01% |
91,524
+1,763
| +2% | +$37.8K |
|
208
ProShares Ultra Bloomberg Crude Oil
UCO
$352M
| $1.96M | ﹤0.01% |
148,448
-37,012
| -20% | -$489K |
|
209
Blackbaud
BLKB
$3.25B
| $1.95M | ﹤0.01% |
27,475
+14,431
| +111% | +$1.03M |
|
210
Teradata
TDC
$1.98B
| $1.95M | ﹤0.01% |
50,607
+24,927
| +97% | +$960K |
|
211
Fifth Third Bancorp
FITB
$30.3B
| $1.93M | ﹤0.01% |
+51,629
| New | +$1.93M |
|
212
Guardant Health
GH
$7.42B
| $1.92M | ﹤0.01% |
12,601
+10,048
| +394% | +$1.53M |
|
|
ELMS
213
DELISTED
Electric Last Mile Solutions, Inc. Class A Common stock
ELMS
| $1.92M | ﹤0.01% |
+192,189
| New | +$1.92M |
|
214
Spirit AeroSystems
SPR
$4.76B
| $1.9M | ﹤0.01% |
+39,123
| New | +$1.9M |
|
215
American Express
AXP
$227B
| $1.9M | ﹤0.01% |
13,454
-2,716
| -17% | -$384K |
|
216
BHP
BHP
$138B
| $1.9M | ﹤0.01% |
+30,695
| New | +$1.9M |
|
217
Huntsman Corp
HUN
$1.93B
| $1.9M | ﹤0.01% |
+65,857
| New | +$1.9M |
|
218
Five Below
FIVE
$8.43B
| $1.89M | ﹤0.01% |
9,916
-5,960
| -38% | -$1.14M |
|
219
Whirlpool
WHR
$5.32B
| $1.89M | ﹤0.01% |
8,559
+337
| +4% | +$74.2K |
|
|
PSTH
220
DELISTED
Pershing Square Tontine Holdings, Ltd.
PSTH
| $1.88M | ﹤0.01% |
78,439
-137,042
| -64% | -$3.29M |
|
221
The RealReal
REAL
$990M
| $1.87M | ﹤0.01% |
82,719
+75,388
| +1,028% | +$1.71M |
|
222
TripAdvisor
TRIP
$2.01B
| $1.86M | ﹤0.01% |
34,646
-4,731
| -12% | -$254K |
|
|
BFX
223
DELISTED
BowFlex Inc.
BFX
| $1.86M | ﹤0.01% |
118,796
+91,843
| +341% | +$1.44M |
|
224
Roblox
RBLX
$87.6B
| $1.85M | ﹤0.01% |
+28,537
| New | +$1.85M |
|
225
Sonos
SONO
$1.76B
| $1.84M | ﹤0.01% |
49,179
-54,881
| -53% | -$2.06M |
|