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
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$73.1M |
| 2 |
Western Digital
WDC
|
+$51.8M |
| 3 |
iShares Semiconductor ETF
SOXX
|
+$46M |
| 4 |
Meta Platforms (Facebook)
META
|
+$41.8M |
| 5 |
Alibaba
BABA
|
+$37.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$262M |
| 2 |
Microsoft
MSFT
|
+$194M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$149M |
| 4 |
Apple
AAPL
|
+$119M |
| 5 |
Amazon
AMZN
|
+$107M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.59% |
| 2 | Consumer Discretionary | 0.21% |
| 3 | Healthcare | 0.2% |
| 4 | Industrials | 0.18% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3001
CALL
Cerence
CRNC
$375M
| $678K | ﹤0.01% |
63,400
-25,400
| -29% | -$279K |
|
|
FWDI
3002
CALL
Forward Industries Inc
FWDI
$302M
| $678K | ﹤0.01% |
+102,500
| New | +$1.32M |
|
3003
Adobe
ADBE
$94.5B
| $677K | ﹤0.01% |
1,935
-30,312
| -94% | -$10.3M |
|
3004
Sweetgreen
SG
$733M
| $677K | ﹤0.01% |
100,163
+9,386
| +10% | +$64.5K |
|
|
CRCO
3005
CALL
YieldMax CRCL Option Income Strategy ETF
CRCO
$18.4M
| $676K | ﹤0.01% |
+31,800
| New | +$1.11M |
|
3006
PUT
Portillo's
PTLO
$338M
| $676K | ﹤0.01% |
148,800
-35,300
| -19% | -$184K |
|
3007
PUT
Vanguard Emerging Markets Government Bond ETF
VWOB
$6.16B
| $675K | ﹤0.01% |
5,300
-114,100
| -96% | -$7.7M |
|
3008
CALL
Evergy
EVRG
$19.8B
| $674K | ﹤0.01% |
9,300
+5,500
| +145% | +$417K |
|
|
CWVX
3009
PUT
Tradr 2X Long CRWV Daily ETF
CWVX
$71.1M
| $674K | ﹤0.01% |
+16,500
| New | +$931K |
|
3010
Target Hospitality
TH
$1.6B
| $673K | ﹤0.01% |
84,008
+39,691
| +90% | +$301K |
|
3011
CALL
Hess Midstream
HESM
$5.11B
| $673K | ﹤0.01% |
19,500
-95,000
| -83% | -$3.19M |
|
|
DEA
3012
CALL
Easterly Government Properties
DEA
$1.17B
| $672K | ﹤0.01% |
31,700
+25,600
| +420% | +$556K |
|
|
ORLA
3013
PUT
Orla Mining
ORLA
$3.56B
| $671K | ﹤0.01% |
49,800
+3,200
| +7% | +$38.8K |
|
3014
PUT
BlackLine
BL
$1.8B
| $669K | ﹤0.01% |
12,100
-14,900
| -55% | -$821K |
|
3015
PUT
Chemours
CC
$2.55B
| $668K | ﹤0.01% |
56,700
-9,900
| -15% | -$127K |
|
|
TMQ
3016
CALL
Trilogy Metals
TMQ
$536M
| $668K | ﹤0.01% |
155,000
+49,100
| +46% | +$231K |
|
3017
PUT
Forward Air
FWRD
$466M
| $668K | ﹤0.01% |
26,700
-20,700
| -44% | -$466K |
|
|
ETOR
3018
PUT
eToro Group
ETOR
$3.01B
| $667K | ﹤0.01% |
19,000
-20,500
| -52% | -$792K |
|
|
SRG
3019
CALL
Seritage Growth Properties
SRG
$133M
| $667K | ﹤0.01% |
205,200
+40,700
| +25% | +$154K |
|
|
WYFI
3020
CALL
WhiteFiber Inc
WYFI
$894M
| $667K | ﹤0.01% |
42,200
+41,400
| +5,175% | +$1.02M |
|
3021
Trip.com Group
TCOM
$28.2B
| $666K | ﹤0.01% |
9,268
-11,976
| -56% | -$856K |
|
3022
CALL
APi Group
APG
$17.3B
| $666K | ﹤0.01% |
17,400
-10,000
| -36% | -$370K |
|
3023
BlueLinx
BXC
$453M
| $665K | ﹤0.01% |
+10,833
| New | +$699K |
|
|
ABTC
3024
PUT
American Bitcoin Corp
ABTC
$429M
| $665K | ﹤0.01% |
26,093
+20,393
| +358% | +$1.27M |
|
3025
CALL
National Fuel Gas
NFG
$7.67B
| $664K | ﹤0.01% |
8,300
+2,100
| +34% | +$173K |
|
Similar funds
Simplex Trading's Q4 2025 Portfolio in Review
As of Q4 2025, Simplex Trading held 10,526 positions worth $177B, down 9% from $195B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading withdrew a net $23.2B in Q4 2025, closing 2,184 positions and reducing 4,088 holdings. Its most notable exit was iShares Russell 2000 ETF, an estimated $149M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.59% of assets, down from 0.79% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Western Digital worth $58.9M.
- Simplex Trading's largest Q4 2025 buy was Western Digital: 341,762 shares worth $58.9M.
- Simplex Trading added most to Netflix in Q4 2025, an estimated $73.1M increase.
- Simplex Trading's biggest Q4 2025 reduction was NVIDIA, cutting an estimated $262M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q4 2025, selling an estimated $149M.
- Simplex Trading's ten largest holdings make up 49% of its $177B portfolio in Q4 2025.
- Simplex Trading opened 1,476 new positions and closed 2,184 in Q4 2025.
- Simplex Trading's portfolio value fell 9% quarter-over-quarter to $177B.
Based on Simplex Trading's 13F filing for Q4 2025, filed 11 Feb 2026.