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 |
Amazon
AMZN
|
+$84.3M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37M |
| 3 |
Amgen
AMGN
|
+$32.3M |
| 4 |
Micron Technology
MU
|
+$29.4M |
| 5 |
Qualcomm
QCOM
|
+$18M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$29.8M |
| 2 |
Gilead Sciences
GILD
|
+$29.3M |
| 3 |
Goldman Sachs
GS
|
+$27.7M |
| 4 |
Booking.com
BKNG
|
+$26M |
| 5 |
AT&T
T
|
+$20.8M |
Sector Composition
| 1 | Technology | 20.65% |
| 2 | Communication Services | 17.64% |
| 3 | Consumer Discretionary | 14.77% |
| 4 | Healthcare | 11.1% |
| 5 | Financials | 6.35% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
876
Encompass Health
EHC
$12.7B
| $95K | ﹤0.01% |
+2,479
| New | +$95K |
|
|
RDUS
877
DELISTED
Radius Health, Inc.
RDUS
| $95K | ﹤0.01% |
2,111
-32,621
| -94% | -$1.47M |
|
878
Equifax
EFX
$32.1B
| $94K | ﹤0.01% |
+686
| New | +$94K |
|
879
Equity Residential
EQR
$25.5B
| $94K | ﹤0.01% |
1,438
+429
| +43% | +$28K |
|
880
Manitowoc
MTW
$363M
| $94K | ﹤0.01% |
3,944
-262
| -6% | -$6.24K |
|
|
AFTY
881
DELISTED
Pacer CSOP FTSE China A50 ETF
AFTY
| $94K | ﹤0.01% |
6,150
-15,323
| -71% | -$234K |
|
|
ATCO
882
DELISTED
Atlas Corp.
ATCO
| $94K | ﹤0.01% |
13,289
+13,037
| +5,173% | +$92.2K |
|
883
Artisan Partners
APAM
$3.33B
| $93K | ﹤0.01% |
+3,034
| New | +$93K |
|
884
Box
BOX
$4.77B
| $93K | ﹤0.01% |
+5,110
| New | +$93K |
|
885
Gen Digital
GEN
$18.2B
| $93K | ﹤0.01% |
3,300
+2,511
| +318% | +$70.8K |
|
886
UBS Group
UBS
$129B
| $93K | ﹤0.01% |
5,524
-886
| -14% | -$14.9K |
|
887
Peabody Energy
BTU
$2.26B
| $92K | ﹤0.01% |
+3,766
| New | +$92K |
|
888
Coeur Mining
CDE
$9.87B
| $92K | ﹤0.01% |
10,780
-13,450
| -56% | -$115K |
|
889
LivePerson
LPSN
$91.9M
| $92K | ﹤0.01% |
+8,383
| New | +$92K |
|
890
Nova
NVMI
$8.49B
| $92K | ﹤0.01% |
4,165
-2,868
| -41% | -$63.4K |
|
891
Boston Beer
SAM
$2.41B
| $92K | ﹤0.01% |
+702
| New | +$92K |
|
|
ZNGA
892
DELISTED
ZYNGA INC. CL A COMMON
ZNGA
| $91K | ﹤0.01% |
+25,009
| New | +$91K |
|
|
TIVO
893
DELISTED
Tivo Inc
TIVO
| $91K | ﹤0.01% |
+4,902
| New | +$91K |
|
|
MOBL
894
DELISTED
MobileIron, Inc.
MOBL
| $91K | ﹤0.01% |
15,182
+12,235
| +415% | +$73.3K |
|
895
Deluxe
DLX
$882M
| $90K | ﹤0.01% |
1,313
-1,414
| -52% | -$96.9K |
|
896
W.W. Grainger
GWW
$48.4B
| $90K | ﹤0.01% |
+503
| New | +$90K |
|
|
RAD
897
DELISTED
Rite Aid Corporation
RAD
| $89K | ﹤0.01% |
1,525
+940
| +161% | +$54.9K |
|
|
DERM
898
DELISTED
Dermira, Inc.
DERM
| $89K | ﹤0.01% |
3,083
+2,248
| +269% | +$64.9K |
|
899
Dynagas LNG Partners
DLNG
$140M
| $89K | ﹤0.01% |
+5,860
| New | +$89K |
|
900
Fortuna Silver Mines
FSM
$2.56B
| $89K | ﹤0.01% |
18,326
+17,212
| +1,545% | +$83.6K |
|