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 |
Gilead Sciences
GILD
|
$16.8M |
| 2 |
Apple
AAPL
|
$16.2M |
| 3 |
Booking.com
BKNG
|
$15.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
$15.3M |
| 5 |
Wells Fargo
WFC
|
$11.9M |
Top Sells
| 1 |
SPDR Gold Trust
GLD
|
$38M |
| 2 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
$30.7M |
| 3 |
LNKD
LinkedIn Corporation
LNKD
|
$15.2M |
| 4 |
CELG
Celgene Corp
CELG
|
$11.5M |
| 5 |
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
|
$10.5M |
Sector Composition
| 1 | Communication Services | 15.83% |
| 2 | Healthcare | 15.63% |
| 3 | Consumer Discretionary | 12.92% |
| 4 | Technology | 11.44% |
| 5 | Financials | 8.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
INXN
426
DELISTED
Interxion Holding N.V.
INXN
| $283K | 0.02% |
7,837
-1,379
| -15% | -$49.8K |
|
|
TSS
427
DELISTED
Total System Services, Inc.
TSS
| $282K | 0.02% |
+5,988
| New | +$282K |
|
|
OMED
428
DELISTED
OncoMed Pharmaceuticals, Inc.
OMED
| $282K | 0.02% |
24,677
+21,489
| +674% | +$246K |
|
429
Smith & Nephew
SNN
$16.5B
| $281K | 0.02% |
+8,578
| New | +$281K |
|
|
RUTH
430
DELISTED
Ruth's Hospitality Group, Inc.
RUTH
| $279K | 0.02% |
+19,828
| New | +$279K |
|
431
ProShares UltraPro Russell2000
URTY
$397M
| $278K | 0.02% |
5,950
-5,348
| -47% | -$250K |
|
432
Amphastar Pharmaceuticals
AMPH
$1.37B
| $277K | 0.02% |
+14,629
| New | +$277K |
|
|
COL
433
DELISTED
Rockwell Collins
COL
| $274K | 0.02% |
3,250
+3,227
| +14,030% | +$272K |
|
434
Caesars Entertainment
CZR
$5.48B
| $270K | 0.02% |
+19,253
| New | +$270K |
|
435
HF Sinclair
DINO
$9.56B
| $270K | 0.02% |
11,032
+1,691
| +18% | +$41.4K |
|
436
Bank OZK
OZK
$5.9B
| $269K | 0.02% |
+7,026
| New | +$269K |
|
|
GRA
437
DELISTED
W.R. Grace & Co.
GRA
| $269K | 0.02% |
3,645
-3,030
| -45% | -$224K |
|
438
Campbell Soup
CPB
$10.1B
| $268K | 0.02% |
+4,904
| New | +$268K |
|
439
iShares National Muni Bond ETF
MUB
$38.9B
| $268K | 0.02% |
+2,378
| New | +$268K |
|
|
AFAM
440
DELISTED
Almost Family Inc
AFAM
| $268K | 0.02% |
+7,308
| New | +$268K |
|
|
LVLT
441
DELISTED
Level 3 Communications Inc
LVLT
| $267K | 0.02% |
5,774
+3,576
| +163% | +$165K |
|
442
SPDR Euro Stoxx 50 ETF
FEZ
$4.52B
| $266K | 0.02% |
8,149
+1,260
| +18% | +$41.1K |
|
443
LivePerson
LPSN
$89.9M
| $265K | 0.02% |
31,625
+2,381
| +8% | +$20K |
|
444
Gen Digital
GEN
$18.2B
| $264K | 0.02% |
+10,518
| New | +$264K |
|
|
IDTI
445
DELISTED
Integrated Device Technology I
IDTI
| $264K | 0.02% |
+11,435
| New | +$264K |
|
446
Clearway Energy Class C
CWEN
$3.38B
| $262K | 0.02% |
15,458
+10,641
| +221% | +$180K |
|
447
Pacific Biosciences
PACB
$381M
| $262K | 0.02% |
29,302
-14,057
| -32% | -$126K |
|
448
PENN Entertainment
PENN
$2.99B
| $262K | 0.02% |
19,369
+17,164
| +778% | +$232K |
|
449
Transocean
RIG
$2.9B
| $262K | 0.02% |
24,660
-11,978
| -33% | -$127K |
|
|
ACHN
450
DELISTED
Achillion Pharmaceuticals, Inc.
ACHN
| $262K | 0.02% |
32,439
+15,430
| +91% | +$125K |
|