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 | |
|---|---|---|---|---|---|---|
|
DF
1201
DELISTED
Dean Foods Company
DF
| $35K | ﹤0.01% |
2,083
-3,950
| -65% | -$66.4K |
|
|
MATR
1202
DELISTED
Mattersight Corp.
MATR
| $35K | ﹤0.01% |
13,935
+12,041
| +636% | +$30.2K |
|
1203
Carpenter Technology
CRS
$12B
| $34K | ﹤0.01% |
909
-4,648
| -84% | -$174K |
|
1204
Dorchester Minerals
DMLP
$1.21B
| $34K | ﹤0.01% |
2,356
+1,707
| +263% | +$24.6K |
|
1205
Flowserve
FLS
$7.41B
| $34K | ﹤0.01% |
735
-2,007
| -73% | -$92.8K |
|
1206
Omeros
OMER
$284M
| $34K | ﹤0.01% |
1,758
+358
| +26% | +$6.92K |
|
1207
SuRo Capital
SSSS
$218M
| $34K | ﹤0.01% |
9,561
-464
| -5% | -$1.65K |
|
1208
VirnetX
VHC
$77.7M
| $34K | ﹤0.01% |
376
+186
| +98% | +$16.8K |
|
|
HRC
1209
DELISTED
HILL-ROM HOLDINGS, INC.
HRC
| $34K | ﹤0.01% |
+429
| New | +$34K |
|
|
CVO
1210
DELISTED
Cenevo, Inc.
CVO
| $34K | ﹤0.01% |
5,730
-30,598
| -84% | -$182K |
|
1211
AB InBev
BUD
$114B
| $33K | ﹤0.01% |
300
-43,642
| -99% | -$4.8M |
|
1212
Frontline
FRO
$5.16B
| $33K | ﹤0.01% |
+5,864
| New | +$33K |
|
1213
MidCap Financial Investment
MFIC
$1.16B
| $33K | ﹤0.01% |
+1,759
| New | +$33K |
|
1214
Invesco Solar ETF
TAN
$726M
| $33K | ﹤0.01% |
1,662
+528
| +47% | +$10.5K |
|
1215
Tejon Ranch
TRC
$452M
| $33K | ﹤0.01% |
+1,661
| New | +$33K |
|
1216
Universal Electronics
UEIC
$62.8M
| $33K | ﹤0.01% |
+497
| New | +$33K |
|
1217
Vanguard Russell 2000 ETF
VTWO
$12.8B
| $33K | ﹤0.01% |
+600
| New | +$33K |
|
|
MORE
1218
DELISTED
Monogram Residential Trust, Inc.
MORE
| $33K | ﹤0.01% |
+3,469
| New | +$33K |
|
1219
Baytex Energy
BTE
$1.85B
| $32K | ﹤0.01% |
13,337
-5,924
| -31% | -$14.2K |
|
1220
NXP Semiconductors
NXPI
$55.6B
| $32K | ﹤0.01% |
300
-100
| -25% | -$10.7K |
|
1221
Rigel Pharmaceuticals
RIGL
$674M
| $32K | ﹤0.01% |
+1,194
| New | +$32K |
|
1222
Vanguard Energy ETF
VDE
$7.34B
| $32K | ﹤0.01% |
365
-218
| -37% | -$19.1K |
|
|
JOBS
1223
DELISTED
51job, Inc.
JOBS
| $32K | ﹤0.01% |
727
+627
| +627% | +$27.6K |
|
|
STML
1224
DELISTED
Stemline Therapeutics, Inc.
STML
| $32K | ﹤0.01% |
3,558
-3,597
| -50% | -$32.4K |
|
|
SNAK
1225
DELISTED
Inventure Foods, Inc.
SNAK
| $32K | ﹤0.01% |
7,652
+6,052
| +378% | +$25.3K |
|