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 |
NVIDIA
NVDA
|
+$114M |
| 2 |
Citigroup
C
|
+$77M |
| 3 |
Broadcom
AVGO
|
+$53M |
| 4 |
Pinduoduo
PDD
|
+$49.7M |
| 5 |
Intel
INTC
|
+$44.5M |
Top Sells
| 1 |
Energy Select Sector SPDR Fund
XLE
|
+$92.5M |
| 2 |
Pfizer
PFE
|
+$67.5M |
| 3 |
Boeing
BA
|
+$66.7M |
| 4 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
+$44.9M |
| 5 |
PayPal
PYPL
|
+$44.4M |
Sector Composition
| 1 | Technology | 27.91% |
| 2 | Consumer Discretionary | 14.92% |
| 3 | Healthcare | 10.74% |
| 4 | Financials | 10.11% |
| 5 | Materials | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
751
Granite Construction
GVA
$4.79B
| $339K | ﹤0.01% |
5,480
-119
| -2% | -$7.36K |
|
752
Zevra Therapeutics
ZVRA
$446M
| $339K | ﹤0.01% |
69,197
+33,731
| +95% | +$165K |
|
753
ProShares UltraShort QQQ
QID
$276M
| $337K | ﹤0.01% |
8,818
+3,968
| +82% | +$152K |
|
754
TAL Education Group
TAL
$6.55B
| $337K | ﹤0.01% |
31,633
-28,067
| -47% | -$299K |
|
|
OKLO
755
Oklo
OKLO
$11.8B
| $337K | ﹤0.01% |
39,892
+17,595
| +79% | +$149K |
|
756
Casey's General Stores
CASY
$20.7B
| $336K | ﹤0.01% |
881
-3,492
| -80% | -$1.33M |
|
757
National Fuel Gas
NFG
$7.94B
| $336K | ﹤0.01% |
6,202
-6,654
| -52% | -$360K |
|
758
Sensata Technologies
ST
$4.67B
| $336K | ﹤0.01% |
8,996
-58,017
| -87% | -$2.17M |
|
759
Baytex Energy
BTE
$1.82B
| $335K | ﹤0.01% |
96,542
+18,687
| +24% | +$64.8K |
|
|
LAC
760
Lithium Americas
LAC
$689M
| $335K | ﹤0.01% |
125,334
+112,032
| +842% | +$299K |
|
761
Heron Therapeutics
HRTX
$195M
| $334K | ﹤0.01% |
+95,631
| New | +$334K |
|
762
H&R Block
HRB
$6.9B
| $333K | ﹤0.01% |
+6,146
| New | +$333K |
|
763
Listed Funds Trust Roundhill Magnificent Seven ETF
MAGS
$2.77B
| $333K | ﹤0.01% |
7,383
+6,166
| +507% | +$278K |
|
764
Birkenstock
BIRK
$8.72B
| $331K | ﹤0.01% |
6,088
+4,389
| +258% | +$239K |
|
765
Humacyte
HUMA
$233M
| $331K | ﹤0.01% |
69,017
+38,605
| +127% | +$185K |
|
766
YieldMax MSTR Option Income Strategy ETF
MSTY
$4.6B
| $329K | ﹤0.01% |
+11,409
| New | +$329K |
|
767
Editas Medicine
EDIT
$242M
| $328K | ﹤0.01% |
70,292
+42,826
| +156% | +$200K |
|
768
WisdomTree
WT
$2.06B
| $326K | ﹤0.01% |
32,975
+20,106
| +156% | +$199K |
|
|
CNH
769
CNH Industrial
CNH
$14B
| $323K | ﹤0.01% |
+31,893
| New | +$323K |
|
770
Direxion Daily 20+ Year Treasury Bear 3X Shares
TMV
$160M
| $322K | ﹤0.01% |
8,984
-19,805
| -69% | -$710K |
|
771
Palomar
PLMR
$3.18B
| $321K | ﹤0.01% |
3,966
+728
| +22% | +$58.9K |
|
772
L3Harris
LHX
$52.1B
| $320K | ﹤0.01% |
+1,428
| New | +$320K |
|
|
TPC
773
Tutor Perini Corporation
TPC
$3.32B
| $319K | ﹤0.01% |
14,691
+3,292
| +29% | +$71.5K |
|
774
Celldex Therapeutics
CLDX
$1.65B
| $318K | ﹤0.01% |
8,600
-15,501
| -64% | -$573K |
|
775
BorgWarner
BWA
$9.52B
| $317K | ﹤0.01% |
+9,845
| New | +$317K |
|